WO2024004022A1

WO2024004022A1 - Heat exchange element, heat exchange structure, and heat exchange ventilation device

Info

Publication number: WO2024004022A1
Application number: PCT/JP2022/025721
Authority: WO
Inventors: 欣王; 一外川
Original assignee: 三菱電機株式会社
Priority date: 2022-06-28
Filing date: 2022-06-28
Publication date: 2024-01-04

Abstract

The present invention provides a heat exchange element comprising: a first air channel, which is a supply air channel with an inner wall extending vertically and allows air from outside to flow inside from bottom to top, and which has a blocking wall (23) projecting inward from the inner wall; and a second air channel which is a channel independent of the first air channel and which exhausts air from inside to outside. Heat is exchanged between air flowing through the first air channel and air flowing through the second air channel.

Description

Heat exchange elements, heat exchange structures and heat exchange ventilation equipment

The present disclosure relates to a heat exchange element, a heat exchange structure, and a heat exchange ventilation device that perform heat exchange.

Inside a building, in a space where people are present, dust from daily life, substances originating from the human body, materials originating from building materials, etc. that contaminate the air are generated. For this reason, ventilation of indoor air using ventilation fans is essential to ensure human health and comfort, but during periods when heating and cooling are required, in addition to maintaining indoor air quality, air conditioners are used to maintain a temperature environment. becomes important. In order to simultaneously ensure indoor air quality through ventilation, temperature control through air conditioning, and humidity control through dehumidifiers, mechanical ventilation is performed at the same time as air supply and exhaust by heat exchange type ventilation fans, and heat exchange elements are used to Recovering heat is effective in reducing air-conditioning energy and maintaining comfortable air quality during periods when heating and cooling are required.

Patent Document 1 discloses that an air supply duct through which air is supplied from outdoors and an exhaust duct through which exhaust air from indoors is flowed are integrated over a predetermined length range by a common air duct, and the inside of the common air duct is It has been shown that an elongated counterflow type heat exchange element for heat exchange is installed inside.

Utility model registration No. 3156870

According to Cited Document 1, when outside air is introduced from outside, pollutants including dust, pollen, insects, etc. contained in the outside air enter the inside of the house through the heat exchange element together with the outside air, so the air quality in the living space of the house is affected. Getting worse. Contaminants contained in the outside air that is taken in are generally removed using a filter. However, in order to remove pollutants with fine particle sizes, a fine-mesh, high-performance filter is required, and compared to a coarse-mesh filter, the pressure loss is greater, and the power consumption for supplying air (ventilation) is higher. The problem is that it becomes large.

The present disclosure has been made in view of the above, and aims to provide a heat exchange element that can remove pollutants contained in the outside air while ensuring heat exchange efficiency.

In order to solve the above-mentioned problems and achieve the objects, the heat exchange element in the present disclosure is an air supply flow path that has an inner wall extending in the vertical direction and that flows air from the outdoors into the room from the bottom to the top, a first air flow path having a blocking wall protruding inward from an inner wall; and a second air flow path that is independent of the first air flow path and is an exhaust flow path for exhausting air from indoors to outdoors. , is provided. Heat exchange is performed between the air flowing through the first air flow path and the air flowing through the second air flow path.

The heat exchange element according to the present disclosure has the effect of being able to remove pollutants contained in outside air while ensuring heat exchange efficiency.

Schematic diagram showing the configuration of a heat exchange element according to Embodiment 1 Schematic diagram showing the configuration of a heat exchange element according to Embodiment 1 A conceptual cross-sectional view showing the configuration of opposing parts of the heat exchange element according to Embodiment 1. A conceptual cross-sectional view showing the configuration of the lower end portion of the opposing portion of the heat exchange element according to Embodiment 1 A conceptual cross-sectional view showing the configuration of the lower end portion of the opposing portion of the heat exchange element according to Embodiment 1 A conceptual cross-sectional view showing the configuration of the upper end portion of the opposing portion of the heat exchange element according to the first embodiment A bottom view showing the configuration of the air distribution section of the heat exchange element according to Embodiment 1. A top view showing the configuration of the air distribution section of the heat exchange element according to Embodiment 1. Cross-sectional view showing the configuration of a heat exchange element according to Embodiment 2 Schematic diagram showing the configuration of a heat exchange structure according to Embodiment 3 Schematic diagram showing the configuration of a heat exchange ventilation device according to Embodiment 4

Hereinafter, a heat exchange element according to an embodiment will be described in detail based on the drawings.

Embodiment 1.
FIG. 1 is a schematic diagram showing the configuration of a heat exchange element 1 according to the first embodiment. FIG. 2 is a schematic diagram showing the configuration of the heat exchange element 1 according to the first embodiment. FIG. 3 is a conceptual cross-sectional view showing the configuration of the facing portion 2 of the heat exchange element 1 according to the first embodiment. FIG. 3 is a cross-sectional view taken along line III--III in FIG. 1, and is a view seen from the direction of arrow F. 1 to 3, the vertical direction is the Z direction, the horizontal direction is the Y direction, and the direction perpendicular to the plane of the paper is the X direction. The heat exchange element 1 includes a facing portion 2 and triangular

air distribution portions

3a and 3b. The air distribution section 3a is provided at the upper end of the opposing section 2. The air distribution section 3b is provided at the lower end of the opposing section 2. The air distribution section 3a constitutes an inlet for exhaust air 5 and an outlet for supply air 4. The air distribution section 3b constitutes an inlet for supply air 4 and an outlet for exhaust air 5. The opposing part 2 performs heat exchange between the supply air 4 and the exhaust air 5. The heat exchange element 1 includes a plurality of independent exhaust passages 51 that communicate from the air distribution section 3a to the air distribution section 3b via the opposing section 2, and a plurality of independent exhaust passages 51 that communicate with the air distribution section 3b via the opposing section 2. A plurality of independent air supply channels 41 are provided that communicate with the distribution section 3a. The air supply flow path 41 corresponds to a first air flow path, and the exhaust flow path 51 corresponds to a second air flow path. The second air flow path is a flow path independent of the first air flow path. In Embodiment 1, a case will be described in which the exhaust flow path 51 and the air supply flow path 41 in the facing portion 2 have two layers.

As shown in FIG. 3, the facing part 2 has an outer wall part 21 that forms an outer frame of the facing part 2. The four connected outer walls 21 surround the plurality of air supply channels 41 and the plurality of exhaust channels 51 provided inside. The outer wall portion 21 ensures the overall strength of the facing portion 2. The inside of the opposing part 2 is partitioned by a heat-conductive partition plate 22 so that the plurality of air supply channels 41 and the plurality of exhaust channels 51 form two layers in the X direction and eight layers in the Y direction. . The air supply flow path 41 and the exhaust flow path 51 have a rectangular shape that is long in the X direction, and have an aspect ratio of approximately 1 to 50. Furthermore, the air supply flow path 41 and the exhaust flow path 51 have approximately the same area in the XY plane.

FIG. 4 is a conceptual cross-sectional view showing the configuration of the lower end portion of the opposing portion 2 of the heat exchange element 1 according to the first embodiment. FIG. 4 is a sectional view taken along line IV-IV in FIG. 1, and is a view seen from the direction of arrow F. It can be said that FIG. 4 is a diagram showing the configuration of the joint portion between the lower end portion of the opposing portion 2 and the air distribution portion 3b. FIG. 5 is a conceptual cross-sectional view showing the configuration of the lower end portion of the opposing portion 2 of the heat exchange element 1 according to the first embodiment. FIG. 5 is a cross-sectional view taken along the line VV in FIG. 1, showing the internal structure of the lower end of one air supply flow path 41. FIG. 5 shows the internal structure of the lower end of one air supply flow path 41 at the upper left end of FIG. The lower ends of the other air supply channels 41 and the lower ends of the exhaust channels 51 have similar internal structures.

As shown in FIGS. 4 and 5, a plate-shaped blocking wall 23 is provided at the lower end of the opposing portion 2 so as to block half of the plurality of air supply channels 41 and the plurality of exhaust channels 51 in the X direction. It is provided perpendicular to the ventilation direction (Z direction) of the air supply flow path 41. That is, a blocking wall 23 that protrudes inward from the partition plate 22 that is the inner wall of the air supply flow path 41 or the inner wall of the outer wall portion 21 is provided at the lower end of the opposing portion 2 . Further, at the lower end of the opposing part 2, a partition plate 22 that is the inner wall of the exhaust flow path 51 or protrudes inward from the inner wall of the outer wall portion 21 so as to close half of the plurality of exhaust flow paths 51 in the X direction. A plate-shaped blocking wall 23 is provided perpendicular to the ventilation direction (Z direction) of each exhaust flow path 51. The blocking walls 23 are arranged at alternate positions in the X direction to block the air supply flow path 41 and the exhaust flow path 51, thereby forming the flow path into two to four layers in the X direction. The opposing portion 2 is formed such that the two layers at the center in the X direction serve as the exhaust flow path 51, and the layers at both ends in the X direction serve as the air supply flow path 41.

FIG. 6 is a conceptual cross-sectional view showing the configuration of the upper end portion of the opposing portion 2 of the heat exchange element 1 according to the first embodiment. FIG. 6 is a sectional view taken along line VI-VI in FIG. 1, showing the internal structure of the upper end of one air supply flow path 41. FIG. 6 shows the internal structure of the upper end of one air supply flow path 41 at the upper left end of FIG. The upper end portions of the other air supply flow paths 41 and the upper end portions of the exhaust flow paths 51 have similar internal structures. The upper end of the opposing portion 2 of the heat exchange element 1 has the same configuration as the lower end of the opposing portion 2 shown in FIG. That is, at the upper end of the opposing part 2, a plate-shaped blocking wall 23 is provided at right angles to the ventilation direction (Z direction) of each air supply flow path 41 so as to block half of the plurality of air supply flow paths 41 in the X direction. It is provided. Further, at the upper end of the opposing portion 2, a plate-shaped blocking wall 23 is provided at right angles to the ventilation direction (Z direction) of each exhaust flow path 51 so as to block half of the plurality of exhaust flow paths 51 in the X direction. It is provided. The blocking walls 23 are arranged at alternate positions in the X direction to block the air supply flow path 41 and the exhaust flow path 51, thereby forming the flow path into two to four layers in the X direction. The opposing portion 2 is formed such that the two layers at the center in the X direction serve as the exhaust flow path 51, and the layers at both ends serve as the air supply flow path 41.

FIG. 7 is a bottom view showing the configuration of the air distribution section 3b of the heat exchange element 1 according to the first embodiment. FIG. 7 is a diagram of the air distribution section 3b of the heat exchange element 1 of FIG. 1 viewed from the direction of arrow F. The air distribution portion 3b has a triangular prism shape with an axis in the X direction. The air distribution section 3b includes a first oblique section 31 and a third oblique section 33 having inclined surfaces. The first oblique portion 31 is provided with outside air intake openings 35 as inlets for the supply air 4 at both end sides in the X-axis direction. The outside air intake opening 35 communicates with a plurality of air supply channels 41, which are layers at both ends in the X direction, shown in FIG. 4, at the lower end of the opposing portion 2, respectively. The third oblique portion 33 is provided with an exhaust outlet opening 37 as an outlet for the exhaust air 5 at the center in the X-axis direction. The exhaust outlet openings 37 communicate with a plurality of exhaust flow paths 51, which are the central two layers in the X direction, shown in FIG. 4, at the lower end of the facing portion 2, respectively.

FIG. 8 is a top view showing the configuration of the air distribution section 3a of the heat exchange element 1 according to the first embodiment. FIG. 8 is a diagram of the air distribution section 3a of the heat exchange element 1 of FIG. 1 viewed from the direction of arrow G. The air distribution part 3a has a triangular prism shape with an axis in the X direction. The air distribution section 3a includes a second oblique section 32 and a fourth oblique section 34 each having an inclined surface. The second oblique portion 32 is provided with supply air outlet openings 36 as outlets for the supply air 4 on both sides in the X-axis direction. The air supply outlet opening 36 communicates with a plurality of air supply channels 41, which are layers at both ends in the X direction, shown in FIG. 4, at the upper end of the opposing portion 2, respectively. The fourth oblique portion 34 includes an inside air intake opening 38 as an inlet for the exhaust air 5 at the center in the X-axis direction. The inside air intake opening 38 communicates at the upper end of the facing portion 2 with a plurality of exhaust flow paths 51, which are the central two layers in the X direction, shown in FIG.

　Explain the flow of air. The supply air 4 (external air, etc.) taken in from the outside air intake opening 35 provided in the lower air distribution section 3b flows upward through the plurality of supply air channels 41 of the opposing section 2, and is passed through the upper air distribution section 3b. The air exits through the air supply outlet opening 36 provided in the section 3a. Further, the exhaust air 5 (indoor air, etc.) taken in from the inside air intake opening 38 provided in the upper air distribution part 3a flows downward through the plurality of exhaust flow paths 51 in the facing part 2, and The air exits through an exhaust outlet opening 37 provided in the air distribution section 3b. In the opposing portion 2 , heat exchange is performed between the supply air 4 passing through the supply air flow path 41 and the exhaust air 5 passing through the exhaust flow path 51 via the partition plate 22 .

Next, the removal of fine particles such as dust will be explained. When the supply air 4 flows from the air distribution section 3b to the opposing section 2, it passes through the blocking wall 23, causing a sudden expansion of the flow path. Due to the blocking wall 23, the supply air 4 changes from a laminar flow to a turbulent flow, and a vortex is generated near the wall surface of the blocking wall 23. Since the air supply flow path 41 in the opposing portion 2 is arranged in the vertical direction, the flow direction of the air supply air 4 is vertical, resulting in an upward airflow. Fine particles such as dust in the air supply air 4 in the air supply flow path 41 are likely to be prevented from reaching the upper air supply outlet opening 36 due to gravity if the particle size is large (for example, 50 μm or more), and they will settle due to gravity. Due to this effect, it descends due to gravity and is deposited and attached to the surface of the blocking wall 23. Particles with a small size (for example, less than 50 μm) remain in the space where the vortex is generated due to the turbulent migration effect, and after the flow of the supply air 4 stops, they are eventually deposited on the surface of the blocking wall 23 due to gravity. And it sticks. In other words, by providing a structure in which the flow direction of the supply air 4 in the opposing part 2 is a vertical upward airflow and has the blocking wall 23, the flow path of the heat exchange element 1 is It can exclude particulates in the air passing through the air, contributing to the filter function of removing dust from the supply air. Furthermore, since the supply air flow path 41 in the opposing portion 2 is arranged in the vertical direction, most of the dust in the removed supply air 4 can be deposited on the blocking wall 23 without depositing on the partition plate 22. There is no fear that the heat exchange efficiency will be inhibited due to the accumulation of dust on the partition plate 22. Further, since dust accumulates on the blocking wall 23, it is also possible to prevent dust from accumulating and clogging the wall surface of the inclined air supply channel in the lower air distribution section 3b below the blocking wall 23. can.

Also, by making laminar air turbulent, there is an effect of promoting heat transfer in local areas. The blocking wall 23 can be expected to have a fin effect due to its shape, and by inserting the blocking wall 23 into the air supply flow path 41, heat exchange efficiency is improved. Further, by appropriately setting the cross-sectional area of the air supply flow path 41, it is possible to obtain the effect of removing dust while suppressing an increase in pressure loss at the blocking wall 23.

In addition, although the example in which the air supply flow path 41 in the opposing part 2 is arranged in the vertical direction is shown above, it is not limited to being completely parallel to the vertical direction, and may be arranged in the vertical direction. Due to installation constraints of the heat exchange element 1, it may not be completely parallel to the vertical direction, but the less parallel to the vertical direction, the more likely dust will accumulate on the partition plate 22, but depending on placement and dust accumulation. It is also important to strike a balance. Further, in this case, it is possible to suppress the deposition on the partition plate 22 even if the surfaces are not parallel by making the surface of the partition plate 22 a material with less irregularities.

In addition, in the facing portion 2, the outer wall portion 21 should have a rectangular cross-sectional shape and be made of a material with as low a thermal conductivity as possible to give the outer wall a heat insulating effect. On the other hand, unlike the outer wall part 21, the partition plate 22 is made of metals such as aluminum, iron, copper, etc., PP (polypropylene), PS (polystyrene), etc., which are materials with as low thermal resistance as possible, with sufficient consideration given to heat transfer performance. By using resin, the heat exchange efficiency between the air supply flow path 41 and the exhaust flow path 51 is improved.

Moreover, although the case where the exhaust flow path 51 and the air supply flow path 41 in the opposing part 2 are two layers has been described above, the exhaust flow path 51 and the air supply flow path 41 may have multiple layers exceeding two layers.

As described above, according to the first embodiment, the blocking wall 23 that protrudes inward from the inner wall of the air supply flow path 41 is provided at the lower end of the air supply flow path 41, so that the outside air is prevented from entering the air while ensuring heat exchange efficiency. It becomes possible to remove contained pollutants such as dust.

Embodiment 2.
FIG. 9 is a sectional view showing the configuration of the heat exchange element 1 according to the second embodiment. FIG. 9 is a sectional view taken along line IX-IX in FIG. 1, showing the internal structure of one air supply flow path 41. The other air supply channels 41 also have similar internal structures. In the second embodiment, in addition to the blocking wall 23 provided at the lower end of the opposing section 2, a blocking wall 39 is provided in the middle of the air supply flow path 41 of the opposing section 2. In each air supply flow path 41, the blocking wall 39 is provided on the opposite side to the blocking wall 23 in the X direction. By installing the blocking wall 39 protruding from the inner wall of the air supply flow path 41 in the middle of the air supply flow path 41, the same effect as in the first embodiment can be achieved. Furthermore, since the blocking walls 39 and the blocking walls 23 are provided alternately so that their protruding directions are opposite in the X direction, the airflow does not pass straight through the air supply flow path 41 of the opposing portion 2. Therefore, the ability to remove dust and the like is further improved. The blocking wall 39 is preferably provided at the center or upstream of the center in the Z direction, which is the vertical direction of the facing portion 2, in consideration of the deposition effect due to gravity.

Furthermore, by making laminar air turbulent, a localized heat transfer promoting effect occurs. The blocking wall 23 and the blocking wall 39 can be expected to have a fin effect due to their shape, and by inserting the blocking wall 23 and the blocking wall 39 into the air supply flow path 41, the heat exchange efficiency is improved.

Although FIG. 9 shows an example in which the blocking wall 23 is provided at the lower end of the opposing portion 2 and the blocking wall 39 is also provided in the middle of the opposing portion 2, the present invention is not limited to this, and the blocking wall 23 may not be provided. At least one blocking wall may be provided in the middle of the air supply flow path 41 of the opposing part 2. In addition, although FIG. 9 shows an example in which one blocking wall 39 is provided in the air supply flow path 41 of the opposing part 2, a plurality of blocking walls 39 may be provided alternately in different directions from upstream to downstream. Good too.

As described above, according to the second embodiment, since the blocking wall 39 is provided in the middle of the air supply flow path 41 of the opposing part 2, the ability to remove contaminants such as dust is improved.

Embodiment 3.
FIG. 10 is a schematic diagram showing the configuration of a heat exchange structure 60 according to the third embodiment. Heat exchange structure 60 includes heat exchange element 1 according to Embodiment 1 or Embodiment 2. In the heat exchange structure 60, the heat exchange element 1 is arranged so that the direction of the air supply flow path of the opposing part 2 is in the vertical direction. The heat exchange element 1 has an air supply outlet opening 36 and an inside air intake opening 38 in the air distribution section 3a. The heat exchange element 1 has an outside air intake opening 35 and an exhaust outlet opening 37 in the air distribution section 3b.

The heat exchange structure 60 includes an air supply duct 42 as a first air supply duct and an air supply duct 43 as a second air supply duct extending in the vertical direction, through which the air supply 4 from the outdoors passes, and an air supply duct 43 as a second air supply duct extending in the vertical direction; An exhaust duct 53 as a first exhaust duct and an exhaust duct 52 as a second exhaust duct extending in the vertical direction are provided, through which the exhaust air 5 passes. The heat exchange structure 60 is formed such that the heat exchange element 1, the

air supply ducts

42, 43, and the

exhaust ducts

52, 53 are integrated. An air supply blower 7 that generates a supply air flow is installed in either of the

air supply ducts

42 or 43, and an exhaust air blower 8 that generates an exhaust air flow is installed in either of the

exhaust ducts

52 or 53.

The air supply duct 42 is provided below the heat exchange element 1, has an outside air intake (not shown) that takes in outdoor air, and connects the outside air intake to the outside air intake opening 35 of the heat exchange element 1. The air supply duct 43 is provided above the heat exchange element 1, has an air supply port (not shown) that supplies air into the room, and connects the air supply port to the air supply outlet opening 36 of the heat exchange element 1. . The exhaust duct 53 is provided above the heat exchange element 1 , has an inside air intake (not shown) that takes in indoor air, and connects the inside air intake and the inside air intake opening 38 of the heat exchange element 1 . The exhaust duct 52 is provided below the heat exchange element 1, has an exhaust port for exhausting air to the outside, and connects the exhaust port to the exhaust outlet opening 37 of the heat exchange element 1.

The air supply flow path of the heat exchange element 1 is provided with the blocking wall 23 or the blocking wall 39 described in the first embodiment or the second embodiment.

According to the third embodiment, it is possible to realize a heat exchange structure 60 that can remove pollutants such as dust contained in the outside air while ensuring heat exchange efficiency.

Embodiment 4.
FIG. 11 is a schematic diagram showing the configuration of a heat exchange ventilation device 70 according to the fourth embodiment. Heat exchange ventilation device 70 includes heat exchange element 1 according to Embodiment 1 or Embodiment 2. The heat exchange ventilation device 70 has an outer shell 71, and the heat exchange element 1 is arranged in the outer shell 71 so that the direction of the air supply flow path of the opposing part 2 is in the vertical direction. The heat exchange element 1 has an air supply outlet opening 36 and an inside air intake opening 38 in the air distribution section 3a. The heat exchange element 1 has an outside air intake opening 35 and an exhaust outlet opening 37 in the air distribution section 3b.

The heat exchange ventilation device 70 has an air supply duct 42 as a first air supply duct connected to the outside air intake opening 35 of the heat exchange element 1. The air supply duct 42 supplies air supply from outside to the outside air intake opening 35 of the heat exchange element 1 . The heat exchange ventilation device 70 has an air supply duct 43 as a second air supply duct connected to the air supply outlet opening 36 of the heat exchange element 1 . The supply air duct 43 supplies the supply air that has been heat exchanged with the heat exchange element 1 into the room. The heat exchange ventilation device 70 has an exhaust duct 53 as a first exhaust duct connected to the inside air intake opening 38 of the heat exchange element 1 . The exhaust duct 53 supplies exhaust air from the room to the inside air intake opening 38 of the heat exchange element 1 . The heat exchange ventilation device 70 has an exhaust duct 52 as a second exhaust duct connected to the exhaust outlet opening 37 of the heat exchange element 1 . The exhaust duct 52 exhausts the exhaust air that has undergone heat exchange with the heat exchange element 1 to the outside.

A supply air blower (not shown) that generates a supply air flow is installed in either of the

supply air ducts

42 or 43, and an exhaust air blower (not shown) that generates an exhaust flow is installed in either of the

exhaust ducts

52 or 53. Decorated. The outer shell 71 has a vertically long shape and can be easily installed inside a thin wall. The supply air blower and the exhaust air blower may be separately provided outside the heat exchange ventilation device 70.

According to Embodiment 4, it is possible to realize a heat exchange ventilation device 70 that can remove pollutants such as dust contained in outside air while ensuring heat exchange efficiency.

In the above-described first to fourth embodiments, a case has been described in which the heat exchange element 1 is of a counter-flow type in which the supply air flow and the exhaust flow flow oppositely, but the present invention is not limited to this. In the cross-flow type heat exchange element 1 in which the air and air flow perpendicularly to each other, the air supply flow path 41 may be provided with blocking

walls

23 and 39. In addition, in a heat exchange structure or a heat exchange type ventilation device equipped with the cross-flow type heat exchange element 1, the air supply passage 41 of the heat exchange element 1 is arranged in the vertical direction, so that the airflow flows from the bottom to the top. You can place it like this. Further, in the first to fourth embodiments described above, the blocking

walls

23 and 39 are provided in the air supply flow path 41 and the exhaust flow path 51, but the blocking

walls

23 and 39 are provided only in the air supply flow path 41. You can do it like this.

The configurations shown in the embodiments described above are examples of the contents of the present invention, and can be combined with other known techniques, and the configurations can be modified without departing from the gist of the present invention. It is also possible to omit or change parts.

1 Heat exchange element, 2 Opposing part, 3a, 3b Air distribution part, 4 Supply air, 5 Exhaust air, 7 Supply air blower, 8 Exhaust sending machine, 21 External wall part, 22 Partition plate, 23, 39 Blocking wall, 31 1st oblique part, 32 2nd oblique part, 33 3rd oblique part, 34 4th oblique part, 35 outside air intake opening, 36 air supply outlet opening, 37 exhaust outlet opening, 38 internal air intake opening, 41 air supply flow path , 42, 43 supply air duct, 51 exhaust flow path, 52, 53 exhaust duct, 60 heat exchange structure, 70 heat exchange ventilation device, 71 outer shell.

Claims

a first air flow path having an inner wall extending in the vertical direction and for flowing air from the outdoors into the room from the bottom upward, the first air flow path having a blocking wall protruding inward from the inner wall;
a second air flow path that is independent of the first air flow path and is an exhaust flow path for exhausting air from indoors to outdoors;
A heat exchange element characterized in that heat exchange is performed between air flowing through the first air flow path and air flowing through the second air flow path.
The first air flow path and the second air flow path include opposing portions in which the flow directions are opposite to each other and parallel to each other, and the blocking wall is disposed in the first air flow path of the opposing portion. The heat exchange element according to claim 1.
3. The heat exchange element according to claim 2, wherein the blocking wall is provided at a lower end of the first air flow path of the opposing portion.
The heat exchange element according to claim 2, wherein the blocking wall is provided in the middle of the first air flow path of the opposing portion.
The blocking wall is provided at the lower end and midway of the first air flow path of the opposing portion, and the blocking wall provided at the lower end and the blocking wall provided midway have a protruding direction. The heat exchange element according to claim 2, characterized in that the heat exchange elements are provided alternately in opposite directions.
The heat exchange element according to claim 4 or 5, wherein the blocking wall is provided at a central portion of the first air flow path of the opposing portion or on an upstream side of the central portion.
The heat exchange element according to any one of claims 2 to 6, wherein the blocking wall blocks half of the air supply flow path.
A heat exchange element according to any one of claims 1 to 7,
a first air supply duct that connects an outside air intake port for taking in outside air to an inlet of the first air flow path of the heat exchange element;
a second air supply duct that connects an outlet of the first air flow path of the heat exchange element to an air supply port that supplies outside air into the room;
a first exhaust duct that connects an inside air intake port that takes in inside air to an inlet of the second air flow path of the heat exchange element;
a second exhaust duct that connects the outlet of the second air flow path of the heat exchange element to an exhaust port that exhausts indoor air to the outside;
an air supply blower that is provided in the first air supply duct or the second air supply duct and generates airflow in the air supply flow path;
an exhaust blower that is provided in the first exhaust duct or the second exhaust duct and generates airflow in the exhaust flow path;
A heat exchange structure comprising:
A heat exchange element according to any one of claims 1 to 7,
an outer shell housing the heat exchange element;
a first air supply duct that connects an outside air intake port for taking in outside air to an inlet of the first air flow path of the heat exchange element;
a second air supply duct that connects an outlet of the first air flow path of the heat exchange element to an air supply port that supplies outside air into the room;
a first exhaust duct that connects an inside air intake port that takes in inside air to an inlet of the second air flow path of the heat exchange element;
a second exhaust duct that connects the outlet of the second air flow path of the heat exchange element to an exhaust port that exhausts indoor air to the outside;
an air supply blower that is provided in the first air supply duct or the second air supply duct and generates airflow in the air supply flow path;
an exhaust blower that is provided in the first exhaust duct or the second exhaust duct and generates airflow in the exhaust flow path;
A heat exchange ventilation device characterized by comprising: