heat exchange device

Abstract

In heat exchange devices, the goal is to improve the heat exchange performance per unit space. [Solution] A heat exchange device 1 is provided with multiple heat exchange units 6, each heat exchange unit 6 having a heat exchange element 8, a first exhaust passage 9 through which indoor air RA toward the heat exchange element 8 passes, a second exhaust passage 10 through which indoor air EA after passing through the heat exchange element 8 passes, a first supply air passage 11 through which outside air OA toward the heat exchange element 8 passes, and a second supply air passage 12 through which outside air SA after passing through the heat exchange element 8 passes. The device 1 is further provided with a case 7 that houses the multiple heat exchange units 6, and the different types of passages among the four types of passages 9, 10, 11, and 12 are separated from each other within the case 7 by partitions 13. In this device 1, the heat exchange performance is enhanced by the multiple heat exchange units 6, and space is saved by separating the different types of passages within the case 7 by partitions 13, resulting in an increased heat exchange performance per unit space.

Description

Technical Field

[0006] , ,

[0007] ,

[0001] The present disclosure relates to a heat exchange device.

Background Art

[0002] As one type of heat exchange device, a total heat exchanger is known. A total heat exchanger is a device that exchanges heat and humidity between an indoor air flow exhausted from indoors to outdoors and an outdoor air flow supplied from outdoors to indoors. Patent Document 1 discloses an example of a total heat exchanger.

[0003] Here, in the description of the total heat exchanger disclosed in Patent Document 1, when using names different from those used in the document for the names of the components of the total heat exchanger and the names of the air flowing through the total heat exchanger, the names used in the document are also noted in parentheses.

[0004] The total heat exchanger 1 disclosed in FIG. 1 of Patent Document 1 is a stationary total heat exchanger, and includes a housing 4 and a total heat exchange element 2 disposed in the housing 4.

[0005] The housing 4 is provided with four passages: a first exhaust passage 51 (second air supply port 51), a second exhaust passage 61 (second exhaust port 61), a first air supply passage 50 (first air supply port 50), and a second air supply passage 60 (first exhaust port 60). The four passages 51, 61, 50, 60 are partitioned from each other by a partition wall 41 provided in the housing 4. A frame 40 provided in the housing 4 fixes the total heat exchange element 2.

[0006] The first exhaust passage 51 and the second exhaust passage 61 are passages through which the indoor air RA (return air RA) and EA (exhaust air EA) exhausted from indoors to outdoors pass, respectively. The first exhaust passage 51 is where the indoor air RA before heat exchange flowing from indoors to the total heat exchange element 2 passes, and the second exhaust passage 61 is where the indoor air EA after heat exchange passing through the total heat exchange element 2 passes.

[0007] The first air supply passage 50 and the second air supply passage 60 are passages through which outside air OA and SA (supply air SA) supplied from the outdoors to the indoors pass, respectively. The first air supply passage 50 is through which outside air OA, before heat exchange, passes from the outdoors toward the total heat exchange element 2, and the second air supply passage 60 is through which outside air SA, after heat exchange, has passed through the total heat exchange element 2.

[0008] As shown in Figures 2 and 3 of Patent Document 1, the total heat exchange element 2 has a structure in which flat partition plates 3A and corrugated spacing plates 3B are alternately stacked. Of the two spacing plates 3B adjacent to each other with the partition plate 3A in between, one spacing plate 3B forms a flow path for indoor air RA, and the other spacing plate 3B forms a flow path for outside air OA. The total heat exchange element 2 allows the airflow of indoor air RA and the airflow of outside air OA to intersect without direct contact. This allows for the exchange of heat and humidity between the two airflows via the partition plate 3A. [Prior art documents] [Patent Documents]

[0009] [Patent Document 1] Japanese Patent Publication No. 2022-112940 [Overview of the project] [Problems that the invention aims to solve]

[0010] For example, in a paint booth at an automobile factory, if the above-mentioned total heat exchanger 1 is used to perform heat exchange between the airflow of indoor air exhausted from the paint booth to the outside of the factory and the airflow of outside air supplied to the paint booth from outside the factory, the following problems will arise.

[0011] The heat exchange performance of a single total heat exchanger 1 is completely insufficient for the performance required in a paint booth, making it essential to install multiple (many) total heat exchangers 1. In this case, each of the multiple total heat exchange elements 2 must have ducts for the four passages 51, 61, 50, and 60. As a result, each total heat exchanger 1 requires space for the ducts for the four passages 51, 61, 50, and 60, as well as workspace for installation. Consequently, a huge amount of space is required.

[0012] As previously mentioned, if a total heat exchanger 1 is used in a paint booth, there is a problem in that an enormous amount of space is required to meet the required heat exchange performance. Therefore, there has been a desire to realize a heat exchange device with high heat exchange performance per unit space.

[0013] In light of the circumstances described above, the challenge to be addressed is to improve the heat exchange performance per unit space in heat exchange devices. [Means for solving the problem]

[0014] A first heat exchange device for solving the above problems is a heat exchange device comprising a plurality of heat exchange sections, wherein each heat exchange section has a heat exchange element that performs heat exchange between two airflows, a first exhaust passage through which indoor air from the room toward the heat exchange element passes, a second exhaust passage through which indoor air after passing through the heat exchange element passes, a first supply passage through which outside air from the outdoors toward the heat exchange element passes, and a second supply passage through which outside air after passing through the heat exchange element passes, and further comprising a case that houses the plurality of heat exchange sections, characterized in that the four types of passages, the first exhaust passage, the second exhaust passage, the first supply passage, and the second supply passage, are separated from each other by partitions within the case.

[0015] In the first heat exchanger, since it is equipped with multiple heat exchange sections, it is possible to inevitably improve the heat exchange performance compared to a case equipped with a single heat exchange section. In this heat exchanger, the multiple heat exchange sections are housed in a case. Within the case, four types of passages (first exhaust passage, second exhaust passage, first supply passage, second supply passage) are separated from each other by partitions. In other words, only partitions exist between adjacent passages of different types within the case, and the passages of different types are arranged within the case with virtually no gaps. This makes it possible to minimize the size of the case and save space. As described above, in the first heat exchanger, the heat exchange performance is improved by the multiple heat exchange sections, and space is saved by separating different types of passages within the case with partitions. As a result, the heat exchange performance per unit space can be improved.

[0016] The second heat exchange device is a configuration in which, in the first heat exchange device described above, at least one of the four types of passages is shared among multiple heat exchange sections.

[0017] In the second heat exchanger, the case size can be further reduced because the passages are shared, resulting in even greater space savings. As a result, the heat exchange performance per unit space can be further improved.

[0018] The third heat exchange device is a configuration in which, in the first or second heat exchange device described above, multiple heat exchange sections and cases are treated as a single module, and multiple modules can be arranged and connected side by side. When connected, the first exhaust passages are connected to each other, the second exhaust passages to each other, and the second supply passages to each other between two adjacent modules.

[0019] In the third heat exchanger, increasing the number of connected modules naturally increases the number of heat exchange units included in the device, thus improving heat exchange performance. Therefore, with the third heat exchanger, the required heat exchange performance can be adjusted by increasing or decreasing the number of connected modules. In this case, because multiple heat exchange units and cases are bundled into a single module, the work required to adjust the heat exchange performance (adding or removing modules) can be completed easily and quickly. For example, if multiple heat exchange units and cases are assembled in advance at a location different from the installation site of the heat exchanger, the installation work at the installation site becomes extremely simple. Furthermore, because it is modular, the module is easy to transport even when installing in a confined space. As a result, it is possible to reduce the equipment cost for heat exchange.

[0020] The fourth heat exchange device is a configuration in which the second air supply passage is positioned away from the inner surface of the case, in addition to any of the first to third heat exchange devices described above.

[0021] In the fourth heat exchanger, the second air supply passage, through which the outside air (outside air after heat exchange) passes after passing through the heat exchange element, is positioned away from the inner surface of the case. This makes the outside air passing through this passage less susceptible to the influence of the environment outside the case. As a result, it is advantageous to supply outside air with a desired temperature into the room through the second air supply passage.

[0022] The fifth heat exchanger is one of the first to fourth heat exchangers described above, wherein (1) the first exhaust passage and the first supply passage, (2) the first exhaust passage and the second supply passage, and (3) the second exhaust passage and the first supply passage are arranged adjacent to each other within the case, and in each combination of (1) to (3) above, the partition between adjacent passages is made of iron.

[0023] In the fifth heat exchanger, heat exchange can be performed between adjacent passages through an iron partition in each combination of the above (1) to (3), and the heat exchange performance can be further enhanced. Here, although the material of the partition is generally iron, when it is desired to promote heat exchange across the partition, a material with high thermal conductivity is used, and when it is desired to suppress heat exchange across the partition, a material with low thermal conductivity is preferably used.

Effect of the Invention

[0024] According to the heat exchanger of the present disclosure, it is possible to enhance the heat exchange performance per unit space.

Brief Description of the Drawings

[0025] [Figure 1] It is a diagram showing a heat exchanger. [Figure 2] It is a diagram showing a heat exchanger. [Figure 3] It is a diagram showing a heat exchanger. [Figure 4] It is a cross-sectional view showing the cross-section (cross-section orthogonal to the Y direction) of the heat exchanger at the location indicated by the thick two-dot chain line C1 in FIG. 2. [Figure 5] It is a cross-sectional view showing the cross-section (cross-section orthogonal to the X direction) of the heat exchanger at the location indicated by the thick two-dot chain line C2 in FIG. 2.

Mode for Carrying Out the Invention

[0026] Hereinafter, embodiments of the heat exchanger will be described with reference to the accompanying drawings. In this embodiment, the case where the heat exchanger is adopted in a painting booth of an automobile factory is taken as an example. Needless to say, the heat exchanger may be adopted in other than the painting booth.

[0027] The X, Y, and Z directions shown in each drawing referenced in the description of the embodiment are mutually orthogonal directions. In this embodiment, the X direction is the left-right direction, with X1 being the left side and X2 being the right side. In this embodiment, the Y direction is the up-down direction, with Y1 being the bottom side and Y2 being the top side. In this embodiment, the Z direction is the front-back direction, with Z1 being the front side and Z2 being the rear side.

[0028] The heat exchange device 1 shown in Figures 1 to 3 is a device for exchanging heat between the airflow of indoor air RA exhausted from the paint booth to the outside of the factory and the airflow of outside air OA supplied to the paint booth from outside the factory. The heat exchange device 1 mainly consists of four modules 2 and a first box 3, a second box 4, and a third box 5 attached to the four modules 2.

[0029] In Figure 1, the first box 3 is shown separated from the foremost module 2 of the four modules 2 in order to make the structure of module 2 easier to understand. However, in reality, the foremost module 2 and the first box 3 are adjacent (see Figures 2 and 3). Also, Figure 3 is a diagram in which the front and back and left and right sides of the heat exchanger 1 are reversed compared to Figures 1 and 2. In Figure 3, the third box 5 is shown separated from the second box 4 in order to make the structure of the second box 4 easier to understand. However, in reality, the second box 4 and the third box 5 are adjacent (see Figures 1 and 2).

[0030] The heat exchanger 1 receives the indoor air RA from the paint booth before heat exchange, flows it into each module 2 through the first box 3, performs heat exchange, and exhausts the indoor air EA after heat exchange to the outside of the factory through the second box 4. Furthermore, the heat exchanger 1 receives the outside air OA from outside the factory before heat exchange, flows it into each module 2, performs heat exchange, and supplies the outside air SA after heat exchange to the paint booth through the third box 5.

[0031] The four modules 2 are interconnected and arranged in the Z direction. The four modules 2 have the same structure, and each of the four has the function of performing heat exchange. The number of interconnected modules 2 can be increased or decreased according to the heat exchange performance required of the heat exchange device 1. In other words, if you want to improve the heat exchange performance of the heat exchange device 1, you can increase the number of modules 2 to five or more, and conversely, if you want to suppress the heat exchange performance, you can reduce the number of modules 2 to three or less.

[0032] As can be seen from Figure 1, each module 2 is an assembly consisting of four heat exchange units 6 and a rectangular parallelepiped case 7 that houses the four heat exchange units 6. In this embodiment, each module 2 is equipped with four heat exchange units 6, but there may be five or more, or three or fewer.

[0033] Each of the four heat exchange units 6 has a heat exchange element 8, a first exhaust passage 9, a second exhaust passage 10, a first supply passage 11, and a second supply passage 12. One heat exchange element 8 is assigned to each heat exchange unit 6. In contrast, of the four types of passages 9, 10, 11, and 12, three types of passages 9, 10, and 12, excluding the first supply passage 11, are shared among multiple heat exchange units 6. Of the four types of passages 9, 10, 11, and 12, different types of passages are separated within the case 7 by partitions 13.

[0034] The heat exchange element 8 intersects two airflows without direct contact: the airflow of indoor air RA flowing into the heat exchange element 8 from the first exhaust passage 9 and the airflow of outside air OA flowing into the heat exchange element 8 from the first supply passage 11. This allows for the exchange of heat and humidity between the two airflows. A commercially available product may be used as the heat exchange element 8, and as an example, it may be a stationary type total heat exchange element having a structure like that disclosed in Patent Document 1.

[0035] The first exhaust passage 9 is the passage through which the room air RA, before heat exchange, flows toward the heat exchange element 8. The room air RA before heat exchange is taken into the first box 3 through the opening 14 (described later), and then flows from the first box 3 into the first exhaust passage 9. Two first exhaust passages 9 are provided within the case 7, and one first exhaust passage 9 is shared by two heat exchange units 6. As a result, the room air RA in the first exhaust passage 9 branches out and flows into the heat exchange element 8 located in one of the two heat exchange units 6 and the heat exchange element 8 located in the other.

[0036] The second exhaust passage 10 is the passage through which the indoor air EA, after heat exchange has taken place through the heat exchange element 8, passes. After heat exchange, the indoor air EA flows out of the second exhaust passage 10 into the second enclosure 4, and then passes through the opening 15 (described later) to be exhausted outside the factory. Two second exhaust passages 10 are provided within the case 7, and one second exhaust passage 10 is shared by two heat exchange units 6. As a result, the indoor air EA that has passed through the heat exchange element 8 in one of the two heat exchange units 6 and the heat exchange element 8 in the other of the two heat exchange units 6 merge within the second exhaust passage 10.

[0037] The first air supply passage 11 is a passage through which the outside air OA, before heat exchange, passes towards the heat exchange element 8. The outside air OA, before heat exchange, is drawn into the case 7 from the intake port 16 (described later) and flows into the first air supply passage 11. Four first air supply passages 11 are provided within the case 7. Each first air supply passage 11 is dedicated to the heat exchange unit 6 and is not shared by multiple heat exchange units 6.

[0038] The second air supply passage 12 is the passage through which the outside air SA, after heat exchange has taken place following the heat exchange element 8, passes. After heat exchange, the outside air SA flows out of the second air supply passage 12 into the third box 5, and then passes through the opening 17 (described later) to be supplied to the paint booth. Only one second air supply passage 12 is provided inside the case 7, and this single second air supply passage 12 is shared by the four heat exchange units 6. As a result, the outside air SA that has passed through the heat exchange elements 8 provided in each of the four heat exchange units 6 merges within the second air supply passage 12.

[0039] Each of the four types of passages 9, 10, 11, and 12 extends in the Z direction. Each of the four types of passages 9, 10, 11, and 12 penetrates from the front to the rear of the rectangular parallelepiped case 7. As a result, the first exhaust passages 9, 9, the second exhaust passages 10, 10, the first supply passages 11, 11, and the second supply passages 12, 12 are connected between two adjacent modules 2, 2 (see Figures 4 and 5). However, the first supply passages 11, 11 may be independent and not connected between two adjacent modules 2, 2.

[0040] Of the four types of passages 9, 10, 11, and 12, the first exhaust passage 9, the second exhaust passage 10, and the first supply passage 11 are all arranged along the inner surface (inner wall surface) of the case 7. Specifically, a portion of the side wall of each of the first exhaust passage 9, the second exhaust passage 10, and the first supply passage 11 is formed by the inner surface of the case 7. On the other hand, the second supply passage 12 is arranged away from the inner surface of the case 7. Specifically, the second supply passage 12 passes through the center of the cross-section perpendicular to the Z direction of the case 7.

[0041] In Case 7, (1) the first exhaust passage 9 and the first supply passage 11, (2) the first exhaust passage 9 and the second supply passage 12, (3) the second exhaust passage 10 and the first supply passage 11, and (4) the second exhaust passage 10 and the second supply passage 12 are arranged adjacent to each other. In each of the above combinations (1) to (4), heat exchange takes place between adjacent passages via the partition 13. Here, the partition 13 is generally made of iron, but if heat exchange across the partition 13 is to be promoted, it is preferable to use a material with high thermal conductivity, and if heat exchange across the partition 13 is to be suppressed, it is preferable to use a material with low thermal conductivity.

[0042] Here, we will give specific examples regarding the material of the partition 13. If you want to increase the thermal conductivity to promote heat exchange across the partition 13, for example, you can use a metal panel as the partition 13. Specific materials for metal panels, in order of decreasing thermal conductivity, include silver, copper, gold, aluminum, magnesium, zinc, iron, tin, and lead. From the perspective of reducing equipment costs, it is advisable to use iron-based plates (steel plates). On the other hand, if you want to decrease the thermal conductivity to suppress heat exchange across the partition 13, for example, you can use a resin plate, vacuum panel, panel with insulation sandwiched in between, or glass plate as the partition 13. From the perspective of reducing equipment costs, it is advisable to use a resin plate.

[0043] Case 7 has a rectangular parallelepiped shape, and each of its top, left, and right sides has intake ports 16 for drawing outside air OA into the first air supply passage 11 inside Case 7. The shape and number of intake ports 16 are not particularly limited, but in this embodiment, two grid-like intake ports 16 are formed on each of the above sides. Each intake port 16 is formed only in a location corresponding to the first air supply passage 11 inside Case 7.

[0044] The first box 3, the second box 4, and the third box 5 all have a rectangular parallelepiped shape. Each of the first to third box 3, 4, and 5 has the same X-direction and Y-direction dimensions as module 2. The first box 3 is connected to the frontmost module 2 of the four modules 2. On the other hand, the second box 4 is connected to the rearmost module 2. The third box 5 is connected to the rear side of the second box 4.

[0045] The first box 3 has a rectangular parallelepiped shape and has an opening 14 on its right side for taking in indoor air RA into the first box 3. The opening 14 is connected to a duct that serves as a flow path for the indoor air RA sent from the paint booth. Of course, the opening 14 may be formed on the left side, top, or front of the first box 3 instead of the right side.

[0046] As can be seen from Figure 2, an inlet 18 is formed on the rear surface of the first box 3, which is connected to the first exhaust passage 9 inside the case 7. Two inlets 18 are formed, and each inlet 18 has the same shape and size as the cross-sectional shape of the first exhaust passage 9 (the cross-sectional shape perpendicular to the Z direction). As a result, the indoor air RA taken into the first box 3 branches out and flows into the two first exhaust passages 9 inside the case 7 through the two inlets 18.

[0047] On the rear surface of the first box 3, the area excluding the region where the two inlets 18 are located (the colored area in Figure 2) functions as a closure (mask). The closure blocks the front ends of the second exhaust passage 10, the first supply passage 11, and the second supply passage 12 within the case 7 with respect to the module 2 adjacent to the first box 3. This prevents the flow of indoor air EA, outside air OA, and outside air SA between the first box 3 and the module 2 adjacent to the first box 3. In other words, only indoor air RA exists inside the first box 3.

[0048] The second box 4 has an opening 15 on its upper surface, which is rectangular in shape, for discharging indoor air EA to the outside of the second box 4. The opening 15 is connected to a duct that serves as a flow path for indoor air EA toward the outside of the factory. A fan 19 is placed inside the duct to guide the indoor air EA toward the outside of the factory. Of course, the opening 15 may be formed on the left side or the right side of the second box 4 instead of the upper surface.

[0049] As can be seen from Figure 3, an outlet 20 is formed on the front of the second box 4, which is connected to the second exhaust passage 10 inside the case 7. Two outlets 20 are formed, and each outlet 20 has the same shape and size as the cross-sectional shape of the second exhaust passage 10 (the cross-sectional shape perpendicular to the Z direction). As a result, the indoor air EA that has passed through the two second exhaust passages 10 inside the case 7 merges inside the second box 4 through the two outlets 20.

[0050] An extension passage 21 is provided inside the second enclosure 4, which is connected to the second air supply passage 12 inside the case 7. The extension passage 21 extends in the Z direction and penetrates from the front to the rear of the second enclosure 4. The extension passage 21 has the same cross-sectional shape and size as the cross-sectional shape of the second air supply passage 12 (cross-sectional shape perpendicular to the Z direction). Inside the second enclosure 4, the internal space and external space of the extension passage 21 are separated by the side walls of the extension passage 21 (shown in color in Figure 3). As a result, the outside air SA that has passed through the second air supply passage 12 inside the case 7 continues to pass through the extension passage 21 and then through the inside of the second enclosure 4.

[0051] On the front of the second enclosure 4, the area excluding the region where the two outlets 20 and the extension passage 21 are located (the area colored in Figure 3) functions as a closure (mask). The closure blocks the rear ends of the first exhaust passage 9 and the first supply passage 11 within the case 7 with respect to the module 2 adjacent to the second enclosure 4. This prevents the flow of indoor air RA and outside air OA between the second enclosure 4 and the module 2 adjacent to the second enclosure 4. Only indoor air EA exists in the space outside the extension passage 21 within the second enclosure 4.

[0052] The third box 5 has an opening 17 on its upper surface, which is rectangular in shape, for discharging outside air SA to the outside of the third box 5. The opening 17 is connected to a duct that serves as a flow path for the outside air SA toward the paint booth. A fan 22 is placed inside the duct to guide the outside air SA toward the paint booth. Of course, the opening 17 may be formed on the left side, right side, or rear side of the third box 5 instead of the upper surface.

[0053] In this heat exchanger 1, the number of ducts connected to the heat exchanger 1 can be limited to only three: the duct connected to the opening 14 of the first box 3, the duct connected to the opening 15 of the second box 4, and the duct connected to the opening 17 of the third box 5. Furthermore, even if the number of connected modules 2 is increased and the number of heat exchange units 6 included in the heat exchanger 1 is increased, the number of ducts connected to the heat exchanger 1 can still be limited to only three.

[0054] An outlet 23 is formed on the front of the third box 5, which is connected to the extension passage 21 inside the second box 4. Only one outlet 23 is formed, and the outlet 23 has the same shape and size as the cross-sectional shape of the extension passage 21 (the cross-sectional shape perpendicular to the Z direction). As a result, the outside air SA that has passed through the extension passage 21 inside the second box 4 flows into the third box 5 through the outlet 23.

[0055] In the front surface of the third box 5, the circulation of fluid (air) between it and the second box 4 is prevented in the area excluding the region where the outlet 23 is located (the colored area in Figure 3). As a result, only outside air SA is present inside the third box 5.

[0056] Based on the configuration of the heat exchanger 1 described above, we will summarize (A) the flow of indoor air exhausted from the paint booth to the outside of the factory and (B) the flow of outside air supplied from outside the factory to the paint booth.

[0057] First, regarding (A) above, the indoor air RA before heat exchange, which has been sent from the paint booth through the duct to the heat exchange device 1, is taken into the first box 3 through the opening 14. Then, the indoor air RA flows into the first exhaust passage 9 provided in the case 7 of each module 2 through the inlet 18. After that, heat exchange takes place as the indoor air RA passes through the heat exchange element 8. The indoor air EA after heat exchange passes through the second exhaust passage 10 provided in the case 7 of each module 2 and then flows out into the second box 4 through the outlet 20. After that, the indoor air EA is discharged outside the second box 4 through the opening 15 and then exhausted outside the factory through the duct.

[0058] Next, regarding (B) above, the outside air OA, before heat exchange, is taken in through the intake port 16 formed in the case 7 of each module 2 into the first supply air passage 11 inside the case 7. Then, as the outside air OA passes through the heat exchange element 8, heat exchange takes place. After heat exchange, the outside air SA passes through the second supply air passage 12 provided inside the case 7 of each module 2, and then further passes through the extension passage 21 inside the second box 4. The outside air SA then flows into the third box 5 through the outlet 23. After that, the outside air SA is discharged outside the third box 5 through the opening 17 and then supplied to the paint booth through the duct. [Explanation of symbols]

[0059] 1 Heat exchange device 6 Heat exchange section 7 cases 8 Heat exchange element 9. First exhaust passage 10 Second exhaust passage 11 First air supply passage 12 Second air supply passage 13 Partition EA Indoor Air OA outside air RA Indoor air SA outside air

Claims

1. Equipped with multiple heat exchange sections, The aforementioned heat exchange section A heat exchange element that performs heat exchange between two airflows, A first exhaust passage through which indoor air flows from the room toward the heat exchange element, A second exhaust passage through which the indoor air passes after passing the heat exchange element, A first air supply passage through which outside air passes from the outside towards the heat exchange element, A second air supply passage through which the outside air passes after passing the heat exchange element, A heat exchanger having, The case further comprises a case for housing the aforementioned plurality of heat exchange units. A heat exchange device characterized in that the four types of passages, the first exhaust passage, the second exhaust passage, the first supply passage, and the second supply passage, are separated from each other by partitions within the case.

2. The heat exchange apparatus according to claim 1, characterized in that at least one of the four types of passages is shared among the plurality of heat exchange units.

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