JP2014020603A - Heat-transfer element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat-transfer element capable of reducing worsening of draft resistance and improving total heat-transfer efficiency by suppressing contact of partition members with each other due to a warp of the partition members caused by temperature and humidity changes.SOLUTION: A heat-transfer element includes: stacked unit structural members each formed by partition members and a space holding member holding the partition members at a predetermined space, the space holding member including: first space ribs; second space ribs; first warp suppressing ribs connected to the second space ribs, provided between the first space ribs in parallel with respect to each in a predetermined pitch, and lower than the first space ribs, and second warp suppressing ribs connected to the first space ribs, provided between the second space ribs in parallel with respect to each in a predetermined pitch, and lower than the second space ribs, the space holding member being arranged at a position where the first warp suppressing ribs and the second warp suppressing ribs are not opposed to each other, when stacking the unit structural members.

Description

  The present invention relates to a heat exchange element having a laminated structure for exchanging heat and humidity between fluids in an air conditioner 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 popularized and the living area using the air conditioner has expanded, the importance of the total heat exchanger for the air conditioner that can recover temperature and humidity in ventilation has increased. ing. In such total heat exchangers, heat exchange elements are mounted as element parts for heat exchange. This heat exchange element can exchange both sensible heat and latent heat without mixing fresh fresh air sucked indoors from the outside and dirty air exhausted indoors to the outdoors. A high heat exchange rate is required. Furthermore, to reduce the power consumption of the air blower (fan, blower, etc.) that circulates the airflow for ventilation and to reduce the operating noise of the total heat exchanger, the ventilation resistance when each airflow circulates is low. Is also sought.

  Conventional heat exchange elements employ a structure in which a partition member having gas shielding properties, heat transfer properties, and moisture permeability is sandwiched between interval holding members having a corrugated cross section, and stacked on a plurality of layers at predetermined intervals. . For example, the partition member is a rectangular flat plate, and the spacing member is a corrugated plate having a triangular cross-sectional shape. The spacing member is reversed 90 degrees between the partition members for each corrugated direction. There are some in which two-way fluid passages that are alternately stacked and pass the primary air flow and the secondary air flow are formed between the respective layers (Patent Document 1). Since the corrugated plate thickness reduces the effective area of the ventilation path formed between the partition members, the contact area between the partition member and the spacing member is large, and the effective area of the heat exchangeable partition member is small. There is a problem that the total heat exchange efficiency is lowered. In addition, since the spacing member is made of paper or the like, there is a problem in that the cross-sectional shape of the ventilation path is liable to collapse and the ventilation resistance is increased.

  For this reason, in recent years, a method of integrally molding a partition member and a resin by using a resin molded product instead of a corrugated plate as a spacing member of a heat exchange element has been used. This structure increases the degree of freedom of the shape of the heat exchange element, and there are some which have improved total heat exchange efficiency and reduced ventilation resistance. (Patent Document 2) Furthermore, partition members created with higher density and higher density have been developed mainly for the purpose of reducing the amount of air leakage of the total heat exchange element and improving the humidity exchange efficiency. It has a low property (air permeability), excellent moisture permeability, and has very good properties as a partition member for a heat exchange element, but at the same time has a large amount of expansion and contraction.

Japanese Patent Publication No.47-19990 JP 2003-287387 A

  When a heat exchange element using such a partition member is used in a humid environment, the partition member expands and bends so that the partition members forming the upper and lower layers come into contact with each other and block the ventilation path. There is a problem that the resistance increases, and as a result, the total heat exchange efficiency is lowered. In addition, when the partition members are in contact with each other, the area of the partition member that is in contact with the air is reduced, so that there is a problem that the return to the normal state is delayed when the environmental humidity temperature is improved.

  The present invention has been made to solve the above-described conventional problems, and in order to improve the total heat exchange efficiency, even if a dense and high-density material is used for the partition member, the deflection of the partition member due to temperature and humidity changes. An object of the present invention is to obtain a heat exchange element capable of reducing the deterioration of ventilation resistance and improving the total heat exchange efficiency by suppressing the contact between the partition members due to.

The present invention is a partition member having heat conductivity and moisture permeability,
An interval holding member for holding the partition member at a predetermined interval;
Heat that exchanges heat and humidity through the partition member between the primary airflow that passes through the front surface side of the partition member and the secondary airflow that passes through the back surface side of the partition member. In the exchange element,
The spacing member is
First spacing ribs provided at predetermined intervals in parallel with the direction in which the primary airflow flows on the surface of the partition member, and provided at predetermined intervals in parallel with the direction in which the secondary airflow flows on the back surface of the partition member. A second spacing rib,
A first deflection suppressing rib connected to the second spacing rib and having a height lower than the first spacing rib provided in parallel between the first spacing ribs at predetermined intervals;
A second deflection suppression rib connected to the first spacing rib and having a height lower than that of the second spacing rib provided in parallel between the second spacing ribs at predetermined intervals;
When the unit component members are stacked, the first deflection suppressing rib and the second deflection suppressing rib are arranged at positions where they do not face each other.

  The heat exchange element according to the present invention has two flow paths for exchanging heat even when the partition member expands and contracts due to a change in the temperature and humidity environment by arranging the deflection suppression ribs at positions where they do not overlap above and below the flow path. When the partition member is deformed and bent due to the static pressure difference, the position of the central portion where the amount of displacement is greatest is shifted in the upper and lower layers, so that the possibility that the expanded and contracted partition members contact each other is reduced. As a result, even when the partition member is expanded and contracted, the contact area between the fluid and the partition member surface is secured, so that the heat exchange amount can be maintained, and the change of the partition member when the temperature and humidity environment is improved can be accelerated. And can quickly return to the normal state.

The perspective view of the heat exchange element which concerns on Embodiment 1 of this invention. FIG. 3 is a perspective view of one unit component member according to Embodiment 1 of the present invention. The schematic diagram of the 4th page figure for the unit structural member one layer which concerns on Embodiment 1 of this invention. The schematic diagram which shows the ventilation path in the heat exchange element which concerns on Embodiment 1 of this invention. The figure which shows the relationship between the bending suppression rib which concerns on Embodiment 1 of this invention, and the bending of a partition member. The figure which shows the relationship between the bending suppression rib which concerns on Embodiment 2 of this invention, and the bending of a partition member. The perspective view of the heat exchange element which concerns on Embodiment 3 of this invention. EE sectional drawing of FIG.

Embodiment 1
Embodiment 1 of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a heat exchange element according to Embodiment 1 of the present invention, and FIG. 2 is a perspective view of one unit component member according to Embodiment 1 of the present invention.
As shown in FIG. 1, the heat exchange element 1 includes a partition member 3 having heat conductivity, moisture permeability, and shielding properties for exchanging heat passing through the front and back, and a spacing member that holds the partition member 3 at a predetermined interval. 4 and the unit constituting member 2 formed by the deflection suppressing rib 7 that suppresses the deflection of the partition member 3 are inverted by 90 degrees for each sheet and alternately stacked, and passes the front side of the partition member 3. The primary airflow A and the secondary airflow B passing through the back side of the partition member 3 exchange heat and moisture via the partition member 3.
Details of each element constituting the heat exchange element 1 will be described below.

The partition member 3 serves as a medium through which heat and moisture are transmitted when heat and humidity are exchanged between the primary airflow A and the secondary airflow B. When the primary airflow A and the secondary airflow B flow, the temperature difference (or water vapor partial pressure difference) of the heat (or water vapor) in the air flow on the high temperature side (or high humidity side) is utilized on both surfaces of the partition member 3 to increase the temperature. The temperature (humidity) is exchanged by moving through the partition member 3 from the side (high humidity side) to the low temperature side (or low humidity side). At the same time, the partition member 3 needs to prevent mixing of the primary airflow A and the secondary airflow B, and to suppress the transfer of carbon dioxide, odor components, etc. between the airflows. In order to satisfy these requirements, the partition member 3 is a dense and high-density material having a density of 0.95 [g / cm ² ] or more and an air permeability resistance (JIS: P8628) of 200 seconds / 100 cc or more. What has moisture permeability is good. Specifically, as the material of the partition member 3, the raw material is Japanese paper, flame retardant paper containing inorganic additives, other specially processed paper, paper mixed with resin and pulp, and the like. Moisture permeable membranes that have been treated with chemicals to impart functionality such as flame retardancy, polyurethane-based resins containing oxyethylene groups with moisture permeability, polyester-based resins containing oxyethylene groups, and terminal or side chains A porous sheet (nonwoven fabric, expanded PTFE membrane, etc.) bonded to a water-insoluble hydrophilic polymer thin film formed of a resin containing a sulfonic acid group, amino group, hydroxyl group, carboxyl group, etc. by heat or an adhesive. In the case of a sensible heat exchanger, it is a resin sheet or resin film such as polystyrene-based ABS, AS, PS, polyolefin-based PP, PE, etc., which has only heat transfer and gas shielding properties.

Further, in order to improve heat transfer, moisture permeability, and gas shielding properties, the partition member 3 is made by thoroughly beating cellulose fibers (pulp) to fibrillate the fibers, making paper using them, and then calendering with a super calender or the like ( The manufacturing method which performs crushing) is used. The partition member 3 manufactured by this manufacturing method has a thickness of about 20 to 60 μm, a density of 0.9 g / cm ³ or more to nearly 1 g / cm ³ or larger, and a normal paper is also available. Compared to (thickness of about 100 to 150 μm, density of about 0.6 to 0.8 g / cm ³ ), it has a dense and high-density structure. Also, in terms of gas shielding properties, conventionally, polyvinyl alcohol is applied as a sealing material to porous paper or the like to increase the air resistance. However, in the partition member 3 having a high density as described above, For example, even if such processing is not performed, since the holes are closed with the cellulose fibers themselves at a high density, about 5,000 seconds / 100 cc is secured.

  The interval holding member 4 has a role of keeping the height of the ventilation path constant when the unit constituent members 2 are stacked. Specifically, the spacing member 4 constitutes an outer frame of the heat exchange element 1, and in order to prevent air leakage from both ends of the heat exchange element 1, shields provided at both ends in parallel with the airflow direction. A plurality of ribs 5 and a plurality of spaced ribs 6 are provided in parallel with the shielding ribs 5 at predetermined intervals, and the interval ribs 6 keep the intervals of the partition members 3 in the stacking direction and form the ventilation paths when the heat exchange elements 1 are stacked. ing.

As shown in FIG. 2, the shielding rib 5 is formed at the peripheral edge of the unit component member 2, and the first shielding rib 5 a provided in parallel with the direction in which the primary airflow A flows on both sides of the surface of the partition member 3, It is comprised from the 2nd shielding rib 5b provided in parallel with the direction where the secondary airflow B flows on both sides of the back surface of the partition member 3, respectively.
The spacing rib 6 is connected to the second shielding rib 5b, and is connected to the first shielding rib 5a and the first shielding rib 5a provided in parallel between the first shielding ribs 5a at predetermined intervals. It is comprised with the 2nd space | interval rib 6b provided in parallel for every predetermined space between the 2 shielding ribs 5b.
Note that the height of the shielding rib 5 and the spacing rib 6 needs to be set so that the ventilation path is not blocked even when the partition member 3 expands with moisture.
Further, a plurality of deflection suppressing ribs 7 are provided between the adjacent spacing ribs 6 at predetermined intervals in parallel with the spacing ribs 6 so as to suppress air passage blockage due to the deflection of the partition member 3.
Specifically, the deflection suppression rib 7 is connected to the second shielding rib 5b or the second interval rib 6b, and the first deflection suppression rib 7a provided in parallel between the first interval ribs 6a at predetermined intervals. And the second shielding ribs 7b connected to the first shielding ribs 5a or the first spacing ribs 6a and provided in parallel between the second spacing ribs 6b at predetermined intervals.

  Next, a detailed configuration of the first deflection suppression rib 7a and the second deflection suppression rib 7b will be described with reference to FIG. FIG. 3 is a schematic diagram of four views of two unit constituent members according to Embodiment 1 of the present invention.

As shown in FIG. 3, four first deflection suppression ribs 7a configured on the front surface side of the unit component member 2 are provided at equal intervals between the first spacing ribs 6a, and a first configuration configured on the back surface side. Five two deflection suppression ribs 7b are provided at equal intervals between the second spacing ribs 6b. Furthermore, the 1st shielding rib 5a comprised on the surface side of the unit structural member 2, the 1st space | interval rib 6a, the 1st deflection | deviation suppression rib 7a, the 2nd shielding rib 5b comprised on the back surface side, the 2nd space | interval rib 6b, The second deflection suppressing rib 7b is configured to be shifted (orthogonal) by 90 degrees.
The first deflection suppression rib 7a and the second deflection suppression rib 7b secure a wide ventilation path and suppress the pressure loss of the air passing through the ventilation path, so that the first shielding rib 5a, the second shielding rib 5b, The height is lower than the first interval rib 6a and the second interval rib 6b, and the rib width is reduced. Further, the depth of the rib is shortened so as not to hinder the heat transfer area and moisture permeability area of the partition member 3. Specifically, the height of the first spacing rib 6a and the second spacing rib 6b is such that the second deflection suppressing rib 7b of the upper layer and the first deflection suppressing rib 7a of the lower layer do not interfere (contact) at the time of lamination. It is desirable that the rib height is less than 1/2. Moreover, since the rib width of the deflection suppressing rib 7 becomes an impediment to the heat transfer area and the moisture permeable area, it is desirable that the bending suppression rib 7 be as thin as possible by molding.
In addition, four first deflection suppression ribs 7a are formed on the front surface side, and five second deflection suppression ribs 7b are configured on the rear surface side. Therefore, the first deflection suppression rib 7a and the second deflection suppression rib 7b are formed. 7b is arranged off.

  The unit component member 2 having the above-described configuration includes a first shielding rib 5a, a second shielding rib 5b, a first spacing rib 6a, a second spacing rib 6b, a first deflection suppressing rib 7a, and a second deflection suppressing rib 7b. It can be obtained by putting the partition member 3 in a mold having a shape carved before molding. In addition to these ribs, for example, irregularities and holes for alignment at the time of stacking, portions for receiving a stripper for extruding a molded product, and the like may be provided as appropriate. This serves to maintain the spacing between the partition members 3 when a large number of layers are stacked.

  Further, the unit component member 2 has a substantially square shape (when the primary airflow A and the secondary airflow B are orthogonal) or a parallelogram shape (when the primary airflow A and the secondary airflow B cross each other), and is a partition member. In general, the first shielding rib 5a and the second shielding rib 5b are generally composed of the first spacing rib 6a and the second spacing rib 5b in order to prevent the manufacturing failure due to the insertion position deviation at the time of molding as much as possible. The width is designed to be wider than the double spacing rib 6b. Moreover, since the direct heat transfer and moisture permeable area of the partition member 3 is lost when the occupied area on the partition member 3 increases, the width of the ribs is as narrow as possible. It is desirable. The narrow width also reduces the amount of resin used. The resin used for the spacing member 4 is polypropylene (PP), acrylonitrile-butadiene-styrene (ABS), polystyrene (PS), acrylonitrile-styrene (AS), polycarbonate (PC), and other general resins in a desired shape. Any material that can be molded may be used. By forming the ribs with resin in this manner, it is possible to suppress deformation due to the humidity of the spacing member 4 and to configure a stable ventilation path. In addition, these resins can be made flame retardant by adding a flame retardant, or an inorganic component can be added to improve dimensional stability and strength. Further, depending on the purpose, it is possible to add a foaming agent (physical foaming agent / chemical foaming agent) to foam the resin to reduce the amount of resin.

When the unit constituent members 2 having the above-described configuration are laminated by shifting by 90 degrees for each layer, the heat exchange element 1 shown in FIG. 1 is completed.
Next, the positional relationship between the first deflection suppression rib 7a and the second deflection suppression rib 7b in the heat exchange element 1 in which the unit structural members 2 according to Embodiment 1 are stacked will be described. FIG. 4 is a schematic diagram showing the ventilation path of the heat exchange element 1 according to Embodiment 1 of the present invention, and FIG. 5 shows the relationship between the deflection suppressing rib and the deflection of the partition member according to Embodiment 1 of the present invention. FIG.
As shown in FIG. 4, the first deflection suppression rib 7a and the second deflection suppression rib 7b are formed in the ventilation path, which is a region surrounded by the partition member 3, the first spacing rib 6a, and the second spacing rib 6b. . The second deflection suppression rib 7b configured in the upper stage and the first deflection suppression rib 7a configured in the lower stage are not positioned so as to face each other because they are arranged at equal intervals. Therefore, as shown in FIG. 5, when the partition member 3 extends due to a change in the temperature and humidity environment because the positions of the first deflection suppression rib 7a and the second deflection suppression rib 7b are not in a relationship of being opposed (displaced). However, since the position of the central part where the displacement becomes the largest when it is deformed due to the pressure difference of the ventilation path that performs heat exchange, the upper and lower partition members 3 are less likely to come into contact with each other. Thereby, even when the partition member 3 is bent, a ventilation path is ensured, and the heat exchange amount can be maintained because the partition member 3 and the air are kept in contact with each other. Further, when the temperature and humidity environment is improved, since the partition member 3 and the air are in contact with each other, the partition member 3 can be quickly returned to the original state, and pressure loss and the like can be quickly returned to the normal state. I can do it. Further, since the partition members 3 are not in contact with each other, when a layer having gas shielding properties is provided on the surface of the partition member 3, the risk of damage to the surface layer due to contact can be reduced. Therefore, there is an effect that the types of usable partition members 3 can be expanded.
In particular, the arrangement interval of the first deflection suppression rib 7a and the second deflection suppression rib 7b is shifted by a half pitch (the first deflection suppression rib 7a of the lower step is arranged at the midpoint of the second deflection suppression rib 7b of the upper step). Thus, even when the partition member 3 is elongated due to a change in the temperature and humidity environment, only the deflection suppression rib 7 having a low height is present at a position facing the central portion between the deflection suppression ribs 7 having the largest change amount. Therefore, the first deflection suppression rib 7a and the second deflection suppression rib 7b do not contact each other.

By obtaining the heat exchange element 1 by such a manufacturing method, first, since the cross-sectional shape of the flow path becomes a rectangular shape, triangular flow paths having the same layer height and the same arrangement interval (crest pitch) (prior art document 1) 4S / L when the diameter of the circular tube, the cross-sectional area of the flow channel is S, and the peripheral length of the flow channel is L Required) and pressure loss is reduced. Further, the spacing member 4 and the deflection suppressing rib 7 serve as a line for restraining the partition member 3, and the partition member 3 is laminated in order to keep the length (free length) of the part that can be deflected on the partition member 3 short by arranging a large number. The deflection dimension in the direction is also reduced, and the decrease in the channel area and the increase in pressure loss due to the extension of the partition member 3 can be suppressed. Further, since the deflection suppressing rib 7 has a low height, a short depth, and a narrow width, the heat transfer area and moisture permeable area of the partition member 3 that have been lost by inserting the gap holding member 4 and the deflection suppressing rib 7 are reduced. Reduction can be suppressed, and the heat exchange efficiency and the humidity exchange efficiency are also improved.
4 and 5 are only those surrounded by the first spacing rib 6a and the second spacing rib 6b, the first shielding rib 5a, the second shielding rib 5b, and the first spacing rib. It may be surrounded by 6a and the second spacing rib 6b. In the first embodiment, the first deflection suppressing ribs 7a are provided on the front surface side and five second deflection suppressing ribs 7b are provided on the rear surface side. The arrangement | positioning space | interval of the 1st bending | deflection suppression rib 7a comprised by the side and the 2nd bending | deflection suppression rib 7b comprised by the back surface should just be a structure shifted.

Embodiment 2
The first embodiment relates to the heat exchange element in which the deflection suppressing ribs are arranged at equal intervals (equal pitch), but in the second embodiment, the deflection suppressing ribs are arranged at unequal pitches (unequal intervals). The present invention relates to a heat exchange element. The second embodiment will be described with reference to FIG. In the second embodiment, differences from the first embodiment will be mainly described, and the same components are denoted by the same reference numerals.

As shown in FIG. 6, the heat exchange element 1 according to the second embodiment has a middle point where the first deflection suppression rib 7 a is arranged at the widest interval and a configuration where the second deflection suppression rib 7 b is arranged at the narrowest interval. The first deflection suppression rib 7a and the second deflection suppression rib 7b are arranged so that the points are opposed to each other, and the middle point of the first deflection suppression rib 7a having the smallest arrangement interval and the second deflection suppression rib The first deflection suppression rib 7a and the second deflection suppression rib 7b are arranged so that the midpoint of the widest arrangement interval of 7b is opposed to each other.
By arranging in this way, even when the partition member 3 is extended due to a change in the temperature and humidity environment, the position of the central portion where the amount of displacement is the largest when the partition member 3 is deformed due to the pressure difference in the heat exchange channel is the most displaced. Since it opposes the position of the center part with a small amount, the possibility that the upper and lower partition members 3 come into contact with each other is reduced. Thereby, even when the partition member 3 is bent, the partition member 3 and the air are kept in contact with each other, so that the heat exchange amount can be maintained. Further, when the temperature and humidity environment is improved, since the partition member 3 and the air are in contact with each other, the partition member 3 can be quickly returned to the original state, and pressure loss and the like can be quickly returned to the normal state. I can do it. Further, since the partition members 3 are not in contact with each other, when a layer having gas shielding properties is provided on the surface of the partition member 3, the risk of damage to the surface layer due to contact can be reduced. Therefore, there is an effect that the types of usable partition members 3 can be expanded. Further, by arranging them at unequal intervals, there is an effect that the bending strength in the surface direction of the unit constituent member 2 is improved in the portions where the intervals are shortened.
Note that the ventilation path shown in FIG. 6 is only surrounded by the first spacing rib 6a and the second spacing rib 6b, but the first shielding rib 5a, the second shielding rib 5b, the first spacing rib 6 and the first spacing rib 6b. It may be surrounded by the two-interval ribs 6b. In the second embodiment, the first deflection suppression ribs 7a are provided on the front surface side and the six second deflection suppression ribs 7b are provided on the rear surface side. However, the number is not limited to this. Moreover, you may interweave with the equal pitch which concerns on Embodiment 1 suitably. By interweaving, the contact between the partition members 3 can be suppressed while obtaining the bending strength in the surface direction.

Embodiment 3
Although Embodiments 1 and 2 have been described with respect to a cross flow type heat exchange element, Embodiment 3 relates to a counter flow type heat exchange element. The third embodiment will be described with reference to FIGS. In the third embodiment, differences from the first and second embodiments will be mainly described, and the same components are denoted by the same reference numerals. 7 is a perspective view of a heat exchange element according to Embodiment 3 of the present invention, and FIG. 8 is a cross-sectional view taken along line EE of FIG.

  The counter-flow type heat exchange element 11 has a substantially S-shaped partition member 13 having heat transfer, moisture permeability and shielding properties for exchanging heat passing through the front and back surfaces, and holding the partition member 13 at a predetermined interval. The unit constituent members 12 formed by the spacing members 14 and the deflection restraining ribs 17 provided in parallel with the spacing members 14 that restrain the deflection of the partition members 13 are alternately reversed by turning each unit upside down. The primary airflow A passing through the front side of the partition member 13 and the secondary airflow B passing through the back side of the partition member 13 exchange heat and moisture via the partition member 13.

  The spacing member 14 is a partition member in the stacking direction when a plurality of substantially S-shaped shielding ribs 15 bent in the middle and a plurality of heat exchange elements 11 provided in a predetermined spacing in parallel with the shielding ribs 15 are stacked. The gap rib 16 is formed with a gap of 13 and forming a ventilation path.

The shielding rib 15 is formed at the peripheral edge of the unit component member 12, and has a substantially S-shaped third shielding rib 15 a provided in parallel to the direction in which the primary airflow A flows on both sides of the surface of the partition member 13. It is comprised from the substantially S-shaped 4th shielding rib 15b provided in parallel with the direction where the secondary airflow B flows on both sides of the back surface of the member 13, respectively.
The spacing ribs 16 are connected to the fourth shielding ribs 15b, and are connected to the third shielding ribs 15a and the third spacing ribs 15a provided in parallel between the third shielding ribs 15a at predetermined intervals. It is comprised with the 4th space | interval rib 16b provided in parallel for every predetermined space between the 4 shielding ribs 15b.
The height of the shielding ribs 15 and the spacing ribs 16 needs to be set so that the air passage is not blocked even if the partition member 13 expands with moisture.

  The shielding ribs 15 and the spacing ribs 16 are arranged in two kinds of line symmetry, and when the unit component member 12 in which the partition member 13 and the spacing member 14 are integrated is laminated, the third shielding rib 15a and the third shielding rib 15a on the surface are laminated. The spacing ribs 16a are arranged so as to be in contact with the fourth shielding ribs 15b and the fourth spacing ribs 16b on the back surface of the next unit constituent member 12 stacked on the spacing ribs 16a. 6 and the shielding ribs 5 are in contact with each other and contact to form an air passage.

Further, a plurality of deflection suppressing ribs 17 are provided between the adjacent spacing ribs 16 at predetermined intervals in parallel with the spacing ribs 16 so as to suppress air passage blockage due to the deflection of the partition member 13.
Specifically, the deflection suppressing rib 17 is connected to the fourth shielding rib 15b or the fourth interval rib 16b, and the third deflection suppressing rib 17a provided in parallel between the third interval ribs 16a at predetermined intervals. And a fourth deflection suppressing rib 17b connected to the third shielding rib 15a or the third spacing rib 16a and provided in parallel between the fourth spacing ribs 16b at predetermined intervals.

  The height of the deflection suppressing ribs 17 is such that the third deflection suppressing ribs 17a of the lower layer and the fourth deflection suppressing ribs 17b of the upper layer do not interfere (contact) when stacked. It is desirable that the height is less than ½ and at least less than ½ of the flow path height. Further, since the rib width of the deflection suppressing rib 17 becomes an obstructive factor for the heat transfer area and the moisture permeable area, it is desired that the deflection suppressing rib 17 be as thin as possible in the molding.

The deflection suppressing rib 17 according to the third embodiment is characterized in that the position is shifted on the front and back of the partition member 13. By shifting the positions of the third deflection suppressing rib 17a and the fourth deflection suppressing rib 17b on the front and back of the partition member 13, the position can be shifted in the stacking direction in the flow path even when the unit component members 12 are stacked. Moreover, when installing the some bending suppression rib 17 in the ventilation path comprised by laminating | stacking the space | interval holding member 14, the installation space | interval of the bending suppression rib 17 is set like Embodiment 1 and Embodiment 2. Methods such as even half-pitch on the front and back and non-uniform pitch can also be used.
The heat exchange element 11 according to the third embodiment performs heat exchange even when the partition member 13 extends due to a change in the temperature and humidity environment, similarly to the heat exchange element 1 according to the first and second embodiments. When the deformation is caused by the pressure difference in the ventilation path, the position of the central portion where the displacement becomes the largest is displaced up and down, so the possibility that the upper and lower partition members 13 are in contact with each other is reduced. As a result, even when the partition member 13 is bent, the amount of heat exchange can be maintained because the partition member 13 and the air are kept in contact with each other. Further, when the temperature and humidity environment is improved, since the partition member 13 and the air are in contact, the partition member 13 can be quickly returned to the original state, and the pressure loss and the like can be quickly returned to the normal state. I can do it. Further, since the partition members 13 do not come into contact with each other, when a layer having gas shielding properties is provided on the surface of the partition member 13, the risk of the surface layer being damaged by the contact can be reduced. Therefore, there is an effect that the types of usable partition members 13 can be expanded.

  In particular, the arrangement interval of the third deflection suppression rib 17a and the fourth deflection suppression rib 17b is shifted by a half pitch (the lower deflection third deflection suppression rib 17a is arranged at an intermediate point of the upper deflection fourth rib 17b). Thus, even when the partition member 13 is extended due to a change in the temperature and humidity environment, only the deflection suppression rib 17 having a low height is located at the position facing the central portion between the deflection suppression ribs 17 having the largest change amount. Therefore, the third deflection suppression rib 17a and the fourth deflection suppression rib 17b do not contact each other.

  In addition, when an inappropriate pitch is adopted, even when the partition member 13 is extended due to a change in the temperature and humidity environment, the position of the central portion where the displacement becomes the largest when the partition member 13 is deformed due to the pressure difference of the heat exchange channel is the displacement. Therefore, the possibility that the upper and lower partition members 13 come into contact with each other is reduced. Accordingly, even when the partition member 13 is bent, the contact area between the partition member 13 and the air is ensured, so that the heat exchange amount can be maintained. Further, when the temperature and humidity environment is improved, since the partition member 13 and the air are in contact, the partition member 13 can be quickly returned to the original state, and the pressure loss and the like can be quickly returned to the normal state. I can do it. Further, since the partition members 13 do not come into contact with each other, when a layer having gas shielding properties is provided on the surface of the partition member 13, the risk of the surface layer being damaged by the contact can be reduced. Therefore, there is an effect that the types of usable partition members 13 can be expanded. Further, by arranging them at unequal intervals, there is an effect that the bending strength in the surface direction of the unit constituting member 12 is improved at the portion where the intervals are shortened.

  In general, the counter-flow type heat exchange element 11 is superior in heat and humidity exchange efficiency when it has the same heat transfer area as the cross-flow type heat exchange element 1, but the air flow path becomes longer. There is a problem that the pressure loss due to bending in the ventilation path is increased. In the counterflow portion of the counterflow type heat exchange element 11 (the portion of the ventilation path of the cross section EE in FIG. 8), the ribs that cross the crossflow and support the partition member 3 at a fine interval are in the same direction. Therefore, when the width of one ventilation path is the same, the partition member 13 is supported at a longer interval than the cross-flow heat exchange element 1 (the heat exchange element according to the first embodiment and the second embodiment). . Therefore, when the partition member 13 is extended and bent due to the temperature and humidity conditions, the distance between the fulcrums is long, and the deflection is increased, and the air passage is largely blocked to further increase the pressure loss.

  Therefore, by obtaining the heat exchange element 11 according to the third embodiment, the pressure loss can be suppressed by making the cross-sectional shape rectangular as in the first and second embodiments, the pressure loss. By inserting a large number of deflection suppression ribs 17 while suppressing as much as possible, the partition member 13 is constrained, and in order to keep the length (free length) of the portion on the partition member 13 that can be deflected short, The deflection dimension is also reduced, and it is possible to obtain an effect that the reduction in the area of the ventilation path and the increase in pressure loss due to the extension of the partition member 13 can be suppressed. Therefore, it is possible to obtain a heat exchange element having higher exchange efficiency than the conventional cross-flow type heat exchange element and suppressing pressure loss as compared with the conventional counterflow type heat exchange element.

DESCRIPTION OF SYMBOLS 1 Heat exchange element 2 Unit structural member 3 Partition member 4 Space | interval holding member 5 Shielding rib 5a First shielding rib 5b Second shielding rib 6 Interval rib 6a First interval rib 6b Second interval rib 7 Deflection suppression rib 7a First deflection suppression Rib 7b Second deflection suppressing rib 11 Heat exchange element 12 Unit component member 13 Partition member 14 Spacing holding member 15 Shielding rib 15a Third shielding rib 15b Fourth shielding rib 16 Spacing rib 16a Third spacing rib 16b Fourth spacing rib 17 Deflection Suppression rib 17a Third deflection suppression rib 17b Fourth deflection suppression rib

Claims (11)

A partition member having heat conductivity and moisture permeability;
An interval holding member for holding the partition member at a predetermined interval;
Heat that exchanges heat and humidity through the partition member between the primary airflow that passes through the front surface side of the partition member and the secondary airflow that passes through the back surface side of the partition member. In the exchange element,
The spacing member is
First spacing ribs provided at predetermined intervals in parallel with the direction in which the primary airflow flows on the surface of the partition member, and provided at predetermined intervals in parallel with the direction in which the secondary airflow flows on the back surface of the partition member. A second spacing rib,
A first deflection suppressing rib connected to the second spacing rib and having a height lower than the first spacing rib provided in parallel between the first spacing ribs at predetermined intervals;
A second deflection suppression rib connected to the first spacing rib and having a height lower than that of the second spacing rib provided in parallel between the second spacing ribs at predetermined intervals;
A heat exchange element, wherein the unit deflection members are arranged at positions where the first deflection suppression rib and the second deflection suppression rib do not face each other. A partition member having heat conductivity and moisture permeability;
An interval holding member for holding the partition member at a predetermined interval;
The primary structural airflow passing through the surface side of the partition member and the secondary airflow passing through the back surface side of the partition member intersecting with the primary airflow are passed through the partition member. In heat exchange elements that exchange heat and humidity,
The spacing member is
First spacing ribs provided at predetermined intervals in parallel with the direction in which the primary airflow flows on the surface of the partition member, and provided at predetermined intervals in parallel with the direction in which the secondary airflow flows on the back surface of the partition member. A second spacing rib,
A first deflection suppressing rib connected to the second spacing rib and having a height lower than the first spacing rib provided in parallel between the first spacing ribs at predetermined intervals;
A second deflection suppression rib connected to the first spacing rib and having a height lower than that of the second spacing rib provided in parallel between the second spacing ribs at predetermined intervals;
A heat exchange element, wherein the unit deflection members are arranged at positions where the first deflection suppression rib and the second deflection suppression rib do not face each other. A partition member having heat conductivity and moisture permeability;
An interval holding member for holding the partition member at a predetermined interval;
And the secondary airflow passing through the rear surface side of the partition member in parallel with the primary airflow is passed through the partition member. In heat exchange elements that exchange heat and humidity,
The spacing member is
First spacing ribs provided at predetermined intervals in parallel with the direction in which the primary airflow flows on the surface of the partition member, and provided at predetermined intervals in parallel with the direction in which the secondary airflow flows on the back surface of the partition member. A second spacing rib,
A first deflection suppressing rib connected to the second spacing rib and having a height lower than the first spacing rib provided in parallel between the first spacing ribs at predetermined intervals;
A second deflection suppression rib connected to the first spacing rib and having a height lower than that of the second spacing rib provided in parallel between the second spacing ribs at predetermined intervals;
A heat exchange element, wherein the unit deflection members are arranged at positions where the first deflection suppression rib and the second deflection suppression rib do not face each other. A partition member having heat conductivity and moisture permeability;
An interval holding member for holding the partition member at a predetermined interval;
Heat that exchanges heat and humidity through the partition member between the primary airflow that passes through the front surface side of the partition member and the secondary airflow that passes through the back surface side of the partition member. In the exchange element,
The spacing member is
First shielding ribs provided in parallel to the direction in which the primary airflow flows on both sides of the surface of the partition member, and first directions provided in parallel to the direction in which the secondary airflow flows on both sides of the back surface of the partition member, respectively. Two shielding ribs,
Connected to the second shielding rib, a first spacing rib provided in parallel between the first shielding ribs at predetermined intervals, connected to the first shielding rib, and between the first shielding ribs A second interval rib provided in parallel at every predetermined interval,
A first deflection suppressing rib connected to the second shielding rib or the second spacing rib and having a height lower than the first spacing rib provided in parallel between the first spacing ribs at predetermined intervals; ,
A second deflection suppressing rib connected to the first shielding rib or the first spacing rib and having a height lower than the second spacing rib provided in parallel between the second spacing ribs at predetermined intervals; With
A heat exchange element, wherein the unit deflection members are arranged at positions where the first deflection suppression rib and the second deflection suppression rib do not face each other. A partition member having heat conductivity and moisture permeability;
An interval holding member for holding the partition member at a predetermined interval;
The primary structural airflow passing through the surface side of the partition member and the secondary airflow passing through the back surface side of the partition member intersecting with the primary airflow are passed through the partition member. In heat exchange elements that exchange heat and humidity,
The spacing member is
First shielding ribs provided in parallel to the direction in which the primary airflow flows on both sides of the surface of the partition member, and first directions provided in parallel to the direction in which the secondary airflow flows on both sides of the back surface of the partition member, respectively. Two shielding ribs,
Connected to the second shielding rib, a first spacing rib provided in parallel between the first shielding ribs at predetermined intervals, connected to the first shielding rib, and between the first shielding ribs A second interval rib provided in parallel at every predetermined interval,
A first deflection suppressing rib connected to the second shielding rib or the second spacing rib and having a height lower than the first spacing rib provided in parallel between the first spacing ribs at predetermined intervals; ,
A second deflection suppressing rib connected to the first shielding rib or the first spacing rib and having a height lower than the second spacing rib provided in parallel between the second spacing ribs at predetermined intervals; With
A heat exchange element, wherein the unit deflection members are arranged at positions where the first deflection suppression rib and the second deflection suppression rib do not face each other. A partition member having heat conductivity and moisture permeability;
An interval holding member for holding the partition member at a predetermined interval;
And the secondary airflow passing through the rear surface side of the partition member in parallel with the primary airflow is passed through the partition member. In heat exchange elements that exchange heat and humidity,
The spacing member is
First shielding ribs provided in parallel to the direction in which the primary airflow flows on both sides of the surface of the partition member, and first directions provided in parallel to the direction in which the secondary airflow flows on both sides of the back surface of the partition member, respectively. Two shielding ribs,
Connected to the second shielding rib, a first spacing rib provided in parallel between the first shielding ribs at predetermined intervals, connected to the first shielding rib, and between the first shielding ribs A second interval rib provided in parallel at every predetermined interval,
A first deflection suppressing rib connected to the second shielding rib or the second spacing rib and having a height lower than the first spacing rib provided in parallel between the first spacing ribs at predetermined intervals; ,
A second deflection suppressing rib connected to the first shielding rib or the first spacing rib and having a height lower than the second spacing rib provided in parallel between the second spacing ribs at predetermined intervals; With
A heat exchange element, wherein the unit deflection members are arranged at positions where the first deflection suppression rib and the second deflection suppression rib do not face each other. The heat exchange element according to claim 3 or 6, wherein the spacing member has a substantially S shape. The first deflection suppressing rib and the second deflection suppressing rib are arranged at the same interval, and the first deflection suppressing rib is arranged at a midpoint between the adjacent second bending suppressing ribs. The heat exchange element according to any one of 7. The heat exchange element according to any one of claims 1 to 7, wherein an arrangement interval between the first deflection suppression rib and the second deflection suppression rib is an unequal interval. 2. The first deflection suppression rib and the second deflection suppression rib are arranged at unequal intervals, and the first deflection suppression rib is disposed at a midpoint between the adjacent second deflection suppression ribs. The heat exchange element in any one of thru | or 7. The heat exchange element according to any one of claims 1 to 10, wherein the first deflection suppression rib and the second deflection suppression rib are ¼ or less of the air passage height.

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