Ventilation device

Abstract

A ventilator 10 includes a casing 11, an exhaust fan 13, a supply fan 14, a heat exchange element 12 having a prismatic shape and having a stacking structure in which an exhaust air ventilation passage 12c through which exhaust air EA passes and a supply air ventilation passage 12d through which supply air SA passes are stacked, the heat exchange element 12 causing the exhaust air EA and the supply air SA to exchange heat, a first side plate 15a that covers an end surface on a first side in a stacking direction of the heat exchange element 12 and a second side plate 15b that covers an end surface on a second side, an element frame 40 that is disposed at each corner 12e of the heat exchange element 12 and extends in the stacking direction between the first side plate 15a and the second side plate 15b, and a holder 30 that is provided in the casing 11 and holds the element frame 40, in which the element frame 40 has a frame body 41, and the frame body 41 is disposed closer to the holder 30 corresponding to the frame body 41 than the heat exchange element 12 in a diagonal direction T of the heat exchange element 12 when viewed in the stacking direction.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a ventilator.BACKGROUND ART

[0002] A ventilator that performs ventilation while exchanging heat between outdoor air (supply air) and indoor air (exhaust air) by a heat exchange element is known (see Patent Literature 1). The ventilator includes an element frame that covers a ridge line (corner) of the heat exchange element having a quadrangular prism shape.CITATION LIST [PATENT LITERATURE]

[0003] PATENT LITERATURE 1: Japanese Patent No. 6479217SUMMARY OF THE INVENTION [TECHNICAL PROBLEM]

[0004] In the heat exchange element, a periphery of the corner is covered with the element frame. Outdoor air and indoor air do not pass through a region of a side surface of the heat exchange element covered with the element frame. Therefore, the region does not contribute to heat exchange between air. As a result, in the conventional ventilator, a loss of heat exchange efficiency occurs in the heat exchange element.

[0005] An object of the present disclosure is to reduce a region that does not contribute to heat exchange in a heat exchange element in a ventilator including the heat exchange element.[SOLUTION TO PROBLEM]

[0006] (1) A ventilator of the present disclosure includes a casing including an exhaust air passage and a supply air passage, an exhaust fan that is installed in the exhaust air passage and generates an exhaust air flow in the exhaust air passage, a supply fan that is installed in the supply air passage and generates a supply air flow in the supply air passage, a heat exchange element having a prismatic shape and having a stacking structure in which an exhaust air ventilation passage through which exhaust air passes and a supply air ventilation passage through which supply air passes are stacked, the heat exchange element causing the exhaust air and the supply air to exchange heat, a first side plate that covers an end surface on a first side and a second side plate that covers an end surface on a second side in a stacking direction of the heat exchange element, an element frame that is disposed at each corner of the heat exchange element and extends in the stacking direction between the first side plate and the second side plate, and a holder that is provided in the casing and holds the element frame, in which the element frame includes a frame body, and the frame body is disposed closer to the holder corresponding to the frame body than the heat exchange element in a diagonal direction of the heat exchange element when viewed in the stacking direction.

[0007] In the ventilator of the present disclosure, the element frame can reduce a range covering the corner of the heat exchange element as compared with the related art. Therefore, the ventilator of the present disclosure can reduce a ratio of a region of a side surface of the heat exchange element through which the supply air and the exhaust air do not pass to a region through which the supply air and the exhaust air. As a result, in the ventilator including the heat exchange element, a region that does not contribute to heat exchange in the heat exchange element can be reduced.

[0008] (2) The ventilator according to an aspect of (1) of the present disclosure preferably further includes a first seal member provided between the heat exchange element and the element frame.

[0009] This configuration can suppress air passing between the heat exchange element and the element frame without passing through the heat exchange element.

[0010] (3) The ventilator according to an aspect of (1) or (2) of the present disclosure preferably further includes a second seal member provided between the element frame and the holder.

[0011] This configuration can suppress air passing between the element frame and the holder without passing through the heat exchange element.

[0012] (4) In the ventilator according to any one aspect of (1) to (3) of the present disclosure, a length of the frame body in an extending direction of a first side of the heat exchange element when viewed in the stacking direction is preferably 10% or less of a length of the first side of the heat exchange element when viewed in the stacking direction.

[0013] This configuration can suppress air flow resistance received by the exhaust air and the supply air due to the element frame. It is therefore possible to suppress a decrease in flow rates of supply air and exhaust air passing through the heat exchange element, and suppress a decrease in heat exchange efficiency in the ventilator.

[0014] (5) In the ventilator according to any one aspect of (1) to (4) of the present disclosure, a length of the heat exchange element in the stacking direction is preferably smaller than a length of the holder.

[0015] This configuration can suppress air passing while bypassing between the exhaust air passage and the supply air passage without passing through the heat exchange element.

[0016] (6) In the ventilator according to any one aspect of (1) to (5) of the present disclosure, the holder preferably holds the element frame so as to be displaceable in the stacking direction of the heat exchange element.

[0017] In this configuration, the element frame and the heat exchange element can be slid along the holder when the heat exchange element is taken in and out of the casing. As a result, in the ventilator of the present disclosure, the heat exchange element can be easily taken in and out of the casing.

[0018] (7) In the ventilator according to any one aspect of (2) to (6) of the present disclosure, preferably, the heat exchange element has a recess formed at the corner along the stacking direction, the element frame has a protrusion protruding from the frame body in a diagonal direction and in a direction toward the heat exchange element, and the protrusion is inserted into the recess.

[0019] In this configuration, by inserting the protrusion into the recess, the heat exchange element can be easily held by the element frame, and a gap between the heat exchange element and the element frame can be closed.

[0020] (8) In the ventilator according to an aspect of (7) of the present disclosure, a protrusion height of the protrusion from the frame body is preferably smaller than a height of the frame body in a protruding direction of the protrusion.

[0021] When the protrusion is inserted into the recess, a region through which supply air and exhaust air do not pass is generated in the recess. In the ventilator of the present disclosure, the above configuration can suppress the protrusion height of the protrusion, and thus, can reduce the ratio of the region of the recess through which the supply air and the exhaust air do not pass of a region through which the supply air and the exhaust air can pass.

[0022] (9) In the ventilator according to an aspect of (7) or (8) of the present disclosure, the protrusion height of the protrusion from the frame body is preferably larger than a depth of the recess in the diagonal direction.

[0023] This configuration can reliably separate the frame body from the corner of the heat exchange element in a state where the protrusion is inserted into the recess. In the ventilator of the present disclosure, the above configuration can reduce the ratio of the region of the side surface of the heat exchange element through which the supply air and the exhaust air do not pass to the region through which the supply air and the exhaust air.

[0024] (10) In the ventilator according to any one aspect of (7) to (9) of the present disclosure, the recess is preferably a V-shaped groove.

[0025] In this configuration, the recess can be easily processed in the heat exchange element.

[0026] (11) In the ventilator according to any one aspect of (7) to (10) of the present disclosure, the protrusion preferably includes a ventilation hole penetrating in a direction orthogonal to the protruding direction of the protrusion from the frame body and an extending direction of the protrusion.

[0027] This configuration allows a part of the recess into which the protrusion is inserted to be a region through which the supply air and the exhaust air can pass. In the ventilator of the present disclosure, the above configuration can reduce the ratio of the region of the side surface of the heat exchange element through which the supply air and the exhaust air do not pass to the region through which the supply air and the exhaust air.

[0028] (12) In the ventilator according to any one aspect of (7) to (11) of the present disclosure, the first seal member is preferably disposed between the recess and the protrusion.

[0029] This configuration can suppress mixing of the supply air and the exhaust air in a space generated between the recess and the protrusion.

[0030] (13) In the ventilator according to any one aspect of (7) to (12) of the present disclosure, the protrusion preferably includes an elastic body press-fittable into the recess.

[0031] In this configuration, since the protrusion includes an elastic body, a gap between the recess and the protrusion can be closed by the protrusion itself. In such a configuration, the ventilator of the present disclosure can suppress air passing between the heat exchange element and the element frame without passing through the heat exchange element.

[0032] (14) In the ventilator according to any one aspect of (3) to (13) of the present disclosure, the second seal member preferably includes an elastic body.

[0033] This configuration can reliably close a gap between the holder and the element frame.

[0034] (15) In the ventilator according to an aspect of (14) of the present disclosure, the element frame preferably includes resin.

[0035] This configuration can suppress wear of the second seal member due to contact with the element frame.

[0036] (16) In the ventilator according to any one aspect of (3) to (15) of the present disclosure, the second seal member is preferably formed integrally with the holder.

[0037] This configuration can provide the second seal member between the element frame and the holder.BRIEF DESCRIPTION OF DRAWINGS

[0038] FIG. 1 is a general explanatory sectional view of a ventilator according to an embodiment of the present disclosure as viewed from above. FIG. 2 is a general explanatory sectional view of the ventilator taken along line A-A indicated in FIG. 1. FIG. 3 is a general explanatory sectional view of the ventilator taken along line B-B indicated in FIG. 1. FIG. 4 is a general perspective view of a heat exchange element. FIG. 5 is a general schematic diagram of an arrangement state of the heat exchange element, an element frame, and a holding member as viewed from above. FIG. 6 is a general schematic diagram showing an arrangement state of the heat exchange element in the ventilator. FIG. 7 is a general schematic diagram showing a heat exchange element and an element frame according to a first embodiment. FIG. 8 is a partially enlarged schematic diagram of the heat exchange element and the element frame according to the first embodiment. FIG. 9 is a general schematic diagram of a heat exchange element and an element frame according to a second embodiment. FIG. 10 is a partially enlarged schematic diagram of the heat exchange element and the element frame according to the second embodiment. FIG. 11 is a general perspective view of the element frame according to the second embodiment. FIG. 12 is a general perspective view of an element frame according to a third embodiment. DETAILED DESCRIPTION

[0039] Embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0040] FIG. 1 is a general explanatory sectional view of a ventilator according to an embodiment of the present disclosure as viewed from above. FIG. 2 is a general explanatory sectional view of the ventilator taken along line A-A indicated in FIG. 1. FIG. 3 is a general explanatory sectional view of the ventilator taken along line B-B indicated in FIG. 1. In the following description, the terms "up", "down", "front", "rear", "left", and "right" are indicated by arrows shown in FIGs. 1 to 3 in conjunction with these terms. Particularly, a first direction indicated by an arrow X in FIG. 1 is defined as a left-right direction, a second direction indicated by an arrow Y in FIGs. 1 to 3 is defined as a front-rear direction, and a third direction Z indicated by an arrow Z in FIGs. 2 and 3 is defined as an up-down direction. However, these descriptions are merely examples, and for example, the first direction X may be read as the front-rear direction, the second direction Y may be read as the left-right direction, and in the third direction Z indicated by the arrow Z, an upward direction may be read as a downward direction and the downward direction may be read as the upward direction.(Overall configuration of ventilator)

[0041] A ventilator 10 shown in FIG. 1 to 3 ventilates an indoor space by exchanging outdoor air with indoor air. The ventilator 10 is installed in the indoor space. The ventilator 10 is connected to the indoor space via ducts D1 and D4, and is connected to an outdoor space via ducts D2 and D3.

[0042] As shown in FIG. 1 to FIG. 3, the ventilator 10 includes a casing 11 having a substantially rectangular parallelepiped box shape. The casing 11 accommodates a heat exchange element 12, an exhaust fan 13, and a supply fan 14. The casing 11 is provided with a return air intake port 21, an exhaust air blow-out port 22, an outside air intake port 23, and a supply air blow-out port 24.(Configurations of supply air passage and exhaust air passage)

[0043] As shown in FIGs. 1 to 3, the return air intake port 21 is used to take in air (return air) RA from the indoor space into the casing 11. The exhaust air blow-out port 22 is used to discharge the return air RA taken into the casing 11 to the outdoor space as exhaust air EA. The outside air intake port 23 is used to take air (outside air) OA from the outdoor space into the casing 11. The supply air blow-out port 24 is used to supply the outside air OA taken into the casing 11 to the indoor space as supply air SA.

[0044] As shown in FIGs. 1 and 2, the return air intake port 21 is connected the indoor space via the duct D1. The exhaust air blow-out port 22 is connected to the outdoor space via the duct D2. The following description refers to an air flow path connecting the indoor space and the outdoor space via the casing 11 by the ducts D1 and D2, and the air flow path will also be called an exhaust air passage (an exhaust air passage 16 described later).

[0045] As shown in FIGs. 1 and 3, the outside air intake port 23 is connected to the outdoor space via the duct D3. The supply air blow-out port 24 is connected to the indoor space via the duct D4. The following description refers to an air flow path connecting the indoor space and the outdoor space via the casing 11 by the ducts D3 and D4, and the air flow path will also be called a supply air passage (a supply air passage 17 described later).

[0046] As shown in FIGs. 1 to 3, in the casing 11, the return air RA taken in through the return air intake port 21 passes the heat exchange element 12 and is exhausted to the outdoor space through the exhaust air blow-out port 22 as the exhaust air EA. Such an air flow will also be referred to as a "first air flow F1". The outside air OA taken in through the outside air intake port 23 passes the heat exchange element 12 and is supplied to the indoor space through the supply air blow-out port 24 as the supply air SA. Such an air flow will also be referred to as a "second air flow F2".(Configuration of heat exchange element 12)

[0047] FIG. 4 is a general perspective view of the heat exchange element. FIG. 5 is a general schematic diagram of an arrangement state of the heat exchange element, an element frame, and a holding member as viewed from above. The ventilator 10 according to the present embodiment includes the heat exchange element 12 shown in FIG. 4. The heat exchange element 12 is an orthogonal total heat exchanger configured such that the first air flow F1 and the second air flow F2 are substantially orthogonal to each other. The heat exchange element 12 includes partition plates 12a and separation wall plates 12b. The partition plates 12a and the separation wall plates 12b are alternately stacked with an appropriate adhesive. The heat exchange element 12 has a substantially quadrangular prism shape as a whole. In the following description, a stacking direction of partition plates 12a and the separation wall plates 12b is also referred to as a stacking direction of the heat exchange element 12. In the heat exchange element 12 of the present disclosure, a longitudinal direction coincides with the stacking direction.

[0048] Each of the partition plates 12a has a heat transfer property and moisture permeability, and has a flat plate shape. Each of the separation wall plates 12b has a corrugated plate shape continuously having substantially triangular sections. Each of the separation wall plates 12b forms an air passage between two of the partition plates 12a adjacent to each other. The separation wall plates 12b are stacked so as to be turned by 90 degrees one by one in the stacking direction (the longitudinal direction in FIG. 4) of the partition plates 12a and the separation wall plates 12b. There are thus provided an exhaust air ventilation passage 12c for the first air flow F1 and a supply air ventilation passage 12d for the second air flow F2. The exhaust air ventilation passage 12c and the supply air ventilation passage 12d interpose the single partition plate 12a, and are orthogonal to each other. Air flowing in the exhaust air ventilation passage 12c and air flowing in the supply air ventilation passage 12d exchange sensible heat and latent heat (total heat exchange) via the partition plate 12a having the heat transfer property and the moisture permeability. The heat exchange element 12 is installed inside the casing 11 (see FIGs. 1 to 3) in such an orientation that the stacking direction (longitudinal direction) is parallel to the left-right direction. That is, the first direction X and the left-right direction represent the stacking direction (longitudinal direction) of the heat exchange element 12.

[0049] As shown in FIGs. 4 and 5, the ventilator 10 of the present disclosure includes a side plate 15 that covers an end surface in the stacking direction of the heat exchange elements 12. The side plate 15 includes a first side plate 15 (hereinafter also referred to as a first side plate 15a) covering an end surface on a first side in the stacking direction and a second side plate 15 (hereinafter also referred to as a second side plate 15b) covering an end surface on a second side. In the ventilator 10 of the present disclosure, the heat exchange element 12 is configured separately from the side plate 15. In the ventilator 10 of the present disclosure, the side plate 15 and the heat exchange element 12 may be integrally configured.

[0050] As shown in FIGs. 1 to 3, the ventilator 10 of the present disclosure includes a plurality of holders 30 for holding the heat exchange element 12. In the ventilator 10, the heat exchange element 12 is held in the casing 11 by a total of four holders 30 arranged in the up-down direction and the front-rear direction.

[0051] As shown in FIGs. 1 to 3, the inside of the casing 11 is sectioned by the heat exchange element 12 into two regions, specifically, a region adjacent to the indoor space and a region adjacent to the outdoor space. As shown in FIGs. 1 and 2, the casing 11 is provided therein with an upstream exhaust air passage 16a disposed upstream of the heat exchange element 12 in the first air flow F1, and a downstream exhaust air passage 16b disposed downstream of the heat exchange element 12 in the first air flow F1. The upstream exhaust air passage 16a, the downstream exhaust air passage 16b, and the exhaust air ventilation passage 12c constitute the exhaust air passage 16 that causes the indoor space and the outdoor space to communicate with each other via the heat exchange element 12.

[0052] As shown in FIGs. 1 and 3, the casing 11 is provided therein with an upstream supply air passage 17a disposed upstream of the heat exchange element 12 in the second air flow F2, and a downstream supply air passage 17b disposed downstream of the heat exchange element 12 in the second air flow F2. The upstream supply air passage 17a, the downstream supply air passage 17b, and the supply air ventilation passage 12d constitute the supply air passage 17 that causes the indoor space and the outdoor space to communicate with each other via the heat exchange element 12. In addition to the exhaust air passage 16 and the supply air passage 17 shown in FIGs. 1 to 3, the ventilator 10 of the present disclosure may include a bypass passage that connects the indoor space and the outdoor space without passing through the heat exchange element 12.

[0053] As shown in FIGs. 2 and 3, the upstream exhaust air passage 16a and the downstream supply air passage 17b interpose a sectioning wall 18. The downstream exhaust air passage 16b and the upstream supply air passage 17a interpose a sectioning wall 19.

[0054] As shown in FIGs. 1 and 2, the downstream exhaust air passage 16b is provided with the exhaust fan 13 near the exhaust air blow-out port 22. The exhaust fan 13, when being driven, generates the first air flow F1, and the return air RA from the indoor space flows through the exhaust air passage 16 and then is discharged to the outdoor space as the exhaust air EA.

[0055] As shown in FIGs. 1 and 3, the downstream supply air passage 17b is provided with the supply fan 14 near the supply air blow-out port 24. The supply fan 14, when being operated, generates the second air flow F2, and the outside air OA in the outdoor space flows through the supply air passage 17 and then is supplied to the indoor space as the supply air SA.(Detailed configuration of heat exchange element)

[0056] FIG. 6 is a general schematic diagram showing an arrangement state of the heat exchange element in the ventilator. FIG. 7 is a general schematic diagram showing a heat exchange element and an element frame according to a first embodiment. FIG. 8 is a partially enlarged schematic diagram of the heat exchange element and the element frame according to the first embodiment. FIGs. 6 to 8 show the first embodiment of the heat exchange element 12 and the element frame 40 included in the ventilator 10 of the present disclosure. In the following description, the heat exchange element 12 according to the first embodiment will also be referred to as a first heat exchange element 12A. In the following description, when simply referred to as the "heat exchange element 12", a common configuration between the first heat exchange element 12A and the heat exchange element 12 (second heat exchange element 12B described later, see FIG. 9) according to another embodiment will be described. In the following description, the element frame 40 according to the first embodiment is also referred to as a first element frame 40A. In the following description, when simply referred to as the "element frame 40", a common configuration between the first element frame 40A and the element frame 40 (second element frame 40B described later, see FIG. 9) according to another embodiment will be described.

[0057] As shown in FIGs. 6 to 8, the heat exchange element 12 has a substantially square shape when viewed in the stacking direction. The heat exchange element 12 has a corner 12e at each vertex (four locations in total) of the square when viewed in the stacking direction. The corner 12e is provided over an entire length in the stacking direction of the heat exchange elements 12. In the ventilator 10 of the present disclosure, the heat exchange element 12 has a form in which four sides are connected by an arc when viewed in the stacking direction. In other words, the heat exchange element 12 has a form in which four planes (also referred to as ventilation surfaces 12f) extending in the stacking direction are connected by the curved corners 12e. In the ventilator 10 of the present disclosure, the form of the corner 12e is not limited to that form, and for example, the heat exchange element 12 may have a square shape (in which the sides are orthogonal to each other) when viewed in the stacking direction. In the ventilator 10 of the present disclosure, the heat exchange element 12 may have a substantially hexagonal shape when viewed in the stacking direction.(Element frame)

[0058] As shown in FIGs. 6 to 8, the ventilator 10 of the present disclosure includes the element frame 40. The element frame 40 is a rod-shaped member extending in the stacking direction between the first side plate 15a and the second side plate 15b. The element frame 40 is disposed at each corner 12e of the heat exchange element 12. The element frame 40 has a first end in a length direction that is coupled to the first side plate 15a and a second end in the length direction that is coupled to the second side plate 15b. The element frame 40 is not required to be coupled to the first side plate 15a and the second side plate 15b. In the present embodiment, the element frame 40 includes resin. The element frame 40 holds each corner 12e of the heat exchange element 12. The ventilator 10 of the present embodiment includes a total of four element frames 40 corresponding to a total of four corners 12e of the heat exchange element 12. The element frame 40 includes a frame body 41. The frame body 41 includes a side surface 42 facing the corner 12e. The side surface 42 is separated from the corner 12e.

[0059] In the ventilator 10 of the present disclosure, a length Q of the frame body 41 in an extending direction of a first side of the heat exchange element 12 as viewed in the stacking direction is preferably 10% or less of a length P of the first side of the heat exchange element 12 as viewed in the stacking direction (see FIG. 7). In the ventilator 10 having such a configuration, it is possible to reduce a ratio of a portion that is closed by the element frame 40 and does not function as the ventilation surface 12f of the ventilation surfaces 12f included in the heat exchange element 12. As a result, in the ventilator 10 including the heat exchange element 12, a region that does not contribute to heat exchange in the heat exchange element 12 can be reduced.(Holder)

[0060] As shown in FIGs. 6 to 8, the holder 30 includes a body 31, and a first recess 32 and a second recess 33 formed in the body 31. The first recess 32 and the second recess 33 are recesses extending parallel to the left-right direction (X direction). The first recess 32 and the second recess 33 according to the present embodiment are grooves in which left and right ends are opened. The first recess 32 holds the element frame 40. The second recess 33 holds a filter 37 that filters air passing through the heat exchange element 12. Note that the first recess 32 and the second recess 33 may have a configuration in which the ends in a length direction (left-right direction) are not opened.(Water tray)

[0061] As shown in FIG. 6, the ventilator 10 of the present disclosure includes the water tray 34. The water tray 34 is a dish-shaped member that receives dew condensation water generated in the heat exchange element 12, and is disposed below the heat exchange element 12.(Holding member)

[0062] As shown in FIGs. 6 to 8, in the ventilator 10 of the present disclosure, the holder 30 includes a holding member 35. The holding member 35 is disposed between the first recess 32 of the holder 30 and the frame body 41. The holding member 35 is a rail-shaped member having a substantially U-shaped cross section orthogonal to a length direction. The holding member 35 according to the present embodiment includes resin and has hardness substantially equal to hardness of the element frame 40. The holding member 35 according to the present embodiment includes resin, but may include metal, for example. Although the holder 30 according to the present embodiment exemplifies a case where the holding member 35 is a separate body, the holding member 35 may be integrally formed in the holder 30.

[0063] The holding member 35 has a groove 36 into which the frame body 41 can be inserted. The holding member 35 is fitted into the first recess 32 and provided along the stacking direction of the heat exchange element 12. The holding member 35 has a role of not bringing the heat exchange element 12 and the first recess 32 into direct contact with each other, and prevents damage and wear of the first recess 32.

[0064] As shown in FIG. 5, in the ventilator 10 according to the present embodiment, a length L1 of the heat exchange element 12 in the stacking direction is smaller than a length L2 of the holder 30 (holding member 35). If the length L1 of the heat exchange element 12 is larger than the length L2 of the holder 30, a gap is generated between the holder 30 and the heat exchange element 12 on the outside in the left-right direction. In this case, air can leak from the gap. In the ventilator 10 according to the present embodiment, the length L1 of the heat exchange element 12 is smaller than the length L2 of the holder 30, and it is therefore possible to suppress the air flowing while bypassing between the exhaust air passage 16 and the supply air passage 17 without passing through the heat exchange element 12.

[0065] As shown in FIGs. 5 to 8, in the ventilator 10 according to the present embodiment, the holding member 35 is a rail-shaped member, and both ends in the length direction of the groove 36 are opened. Therefore, the holding member 35 can slide the frame body 41 (element frame 40) fitted into the groove 36 along the length direction of the groove 36. In other words, the holder 30 holds the element frame 40 so as to be displaceable in the stacking direction of the heat exchange elements 12. Therefore, in the ventilator 10 according to the present embodiment, the element frame 40 and the heat exchange element 12 can be slid along the holding member 35 when the heat exchange element 12 is taken in and out of the casing 11. As a result, in the ventilator 10 according to the present embodiment, the heat exchange element 12 can be easily taken in and out of the casing 11. In the ventilator 10 of the present disclosure, the holding member 35 may have a configuration in which the end of the groove 36 in the length direction is not opened.(Heat exchange element and element frame according to first embodiment)

[0066] In the ventilator 10 of the present disclosure, when the first heat exchange element 12A shown in FIGs. 7 and 8 is adopted, the first element frame 40A is adopted. As shown in FIGs. 7 and 8, the first element frame 40A includes the frame body 41. The frame body 41 extends between the first side plate 15a and the second side plate 15b. The frame body 41 includes a side surface 42 facing the corner 12e.

[0067] When the first heat exchange element 12A and the first element frame 40A are adopted in the ventilator 10, the first seal member 51 is disposed between the corner 12e and the side surface 42. The first seal member 51 is an elastic body including an elastic material. As a material included in the first seal member 51, for example, an adhesive such as silicon caulking can be adopted. The ventilator 10, provided with the first seal member 51 is provided between the first heat exchange element 12A and the first element frame 40A, can suppress air passing between the first heat exchange element 12A and the first element frame 40A without passing through the first heat exchange element 12A. In the ventilator 10, the first seal member 51 provided between the first heat exchange element 12A and the first element frame 40A may be omitted. The first seal member 51 may include a material having no elasticity.

[0068] As shown in FIGs. 7 and 8, when the first heat exchange element 12A and the first element frame 40A are adopted in the ventilator 10, the second seal member 52 is disposed between the frame body 41 and the holding member 35. The second seal member 52 is an elastic body including an elastic material. As a material included in the second seal member 52, for example, elastomer, foamed rubber, or the like can be adopted. The ventilator 10, provided with the second seal member 52 between the first element frame 40A and the holding member 35, can suppress air passing between the first element frame 40A and the holder 30 without passing through the first heat exchange element 12A. In the ventilator 10, the second seal member 52 provided between the first element frame 40A and the holder 30 (holding member 35) may be omitted. The second seal member 52 may include a material having no elasticity.

[0069] In the ventilator 10 according to the present embodiment, the second seal member 52 includes an elastic body. Such a configuration can reliably close a gap between the holder 30 and the first element frame 40A.

[0070] In the ventilator 10 according to the present embodiment, the second seal member 52 is integrally formed with the holder 30. The second seal member 52 is integrally formed with the holding member 35. The second seal member 52 is formed by using a general method of integrally forming different types of resins when the holding member 35 including resin is formed. The ventilator 10 having such a configuration makes it possible to provide the second seal member 52 between the first element frame 40A and the holder 30. Note that the material included in the second seal member 52 is preferably about the same in hardness as the material included in the holding member 35, and is more preferably less in hardness (softer) than the material included in the holding member 35. In ventilator 10 of the present disclosure, the holding member 35 and the second seal member 52 may be separate bodies.

[0071] In the ventilator 10 according to the present embodiment, the first element frame 40A includes resin. Such a configuration can suppress wear of the second seal member 52 which is an elastic body due to contact with the first element frame 40A. The material included in the second seal member 52 and the material included in the first element frame 40A are preferably substantially the same in hardness. By suppressing a difference in hardness between the two materials to be small in this manner, one of the materials is less likely to damage the other, and thus, wear of the second seal member 52 can be reliably suppressed.

[0072] As shown in FIGs. 7 and 8, in the ventilator 10 including the first heat exchange element 12A and the first element frame 40A, the frame body 41 is disposed closer to the holder 30 (holding member 35) than the corner 12e in a diagonal direction T (a first diagonal direction T1 and a second diagonal direction T2) of the heat exchange element 12 when viewed in the stacking direction. Therefore, in the ventilator 10 according to the present embodiment, the first element frame 40A can reduce a range covering the corner 12e of the first heat exchange element 12A as compared with the related art. The ventilator 10 having such a configuration can reduce a ratio of a region of the first heat exchange element 12A through which the supply air SA and the exhaust air EA do not pass to a region through which the supply air SA and the exhaust air EA. In the ventilator 10 including the first heat exchange element 12A according to the present embodiment, a region that does not contribute to heat exchange in the first heat exchange element 12A can be reduced.(Heat exchange element and element frame according to second embodiment)

[0073] FIG. 9 is a general schematic diagram showing a heat exchange element and an element frame according to a second embodiment. FIG. 10 is a partially enlarged schematic diagram of the heat exchange element and the element frame according to the second embodiment. FIG. 11 is a general perspective view of the element frame according to the second embodiment. FIGs. 9 to 11 show the second embodiment of the heat exchange element 12 and the element frame 40 included in the ventilator 10 of the present disclosure. In the following description, the heat exchange element 12 according to the second embodiment is referred to as the second heat exchange element 12B, and the element frame 40 according to the second embodiment is referred to as the second element frame 40B.

[0074] As shown in FIGs. 9 to 11, the second heat exchange element 12B is different from the first heat exchange element 12A described above in that the second heat exchange element 12B has the recess 12g formed in the corner 12e, and the other configurations are common to the first heat exchange element 12A. The second element frame 40B is different from the first element frame 40A described above in that the second element frame 40B has a protrusion 43, and the other configurations are common to the first element frame 40A.

[0075] The second heat exchange element 12B has the recess 12g at the corner 12e. The recess 12g is formed to extend along a diagonal line of the second heat exchange element 12B when viewed in the stacking direction. The recess 12g is provided over an entire length of the corner 12e in the stacking direction. The recess 12g may be provided in a part of the corner 12e in the stacking direction. The second heat exchange element 12B according to the present embodiment includes the recess 12g having a slit shape. In the second heat exchange element 12B according to the present embodiment, the form of the recess 12g is a slit shape, but not limited to this form, and may be a V-shaped groove shape. In a case where the recess 12g is a V-shaped groove, the processing of the recess 12g at the corner 12e can be easier than in a case where the recess 12g has a slit shape.

[0076] The second element frame 40B includes the protrusion 43. The protrusion 43 is a portion protruding from the side surface 42 of the frame body 41 in a direction perpendicular to the side surface 42. The protrusions 43 extend in a length direction of second element frame 40B. The protrusion 43 is provided over an entire length of second element frame 40B. The length of the second element frame 40B (protrusion 43) is the length L2 (see FIG. 11). In a case where the recess 12 g is provided in a part of the corner 12e in the stacking direction, the protrusion 43 may be partially provided in the length direction of the second element frame 40B.

[0077] In the second heat exchange element 12B, the protrusion 43 is inserted into the recess 12g. In the ventilator 10 according to the present embodiment, by inserting the protrusion 43 into the recess 12g, the second heat exchange element 12B can be easily held by the second element frame 40B, and a gap between the second heat exchange element 12B and the second element frame 40B can be closed.

[0078] When the protrusion 43 is inserted into the recess 12g, a region through which supply air and exhaust air do not pass is generated in the recess 12g. Therefore, as shown in FIG. 10, in the second element frame 40B of the present embodiment, a protrusion height H1 of the protrusion 43 from the side surface 42 is smaller than a height H2 of the frame body 41 in a protruding direction of the protrusion 43 (H1<H2). Such a configuration can suppress the protrusion 43 inserted into the recess 12g to be small, and can reduce a ratio of a region of the recess 12g through which the supply air SA and the exhaust air EA do not pass to a region through which the supply air SA and the exhaust air EA can pass. In the second element frame 40B included in the ventilator 10 of the present disclosure, the protrusion height H1 of the protrusion 43 from the side surface 42 may be equal to or larger than the height H2 of the frame body 41 in the protruding direction of the protrusion 43.

[0079] As shown in FIG. 10, in the second element frame 40B according to the present embodiment, the protrusion height H1 of the protrusion 43 from the side surface 42 is set larger than a depth D of the recess 12g in the diagonal directions T1 and T2 (H1>D). Such a configuration can separate the side surface 42 of the frame body 41 from the corner 12e in a state where the protrusion 43 is inserted into the recess 12g. It is therefore possible to reduce a ratio of a region of the second heat exchange element 12B through which the supply air SA and the exhaust air EA do not pass to a region through which the supply air SA and the exhaust air EA can pass. In second element frame 40B included in the ventilator 10 of the present disclosure, the protrusion height H1 of the protrusion 43 from the side surface 42 may be less than or equal to the depth D of the recess 12g in the diagonal directions T1 and T2.

[0080] As shown in FIG. 10, when the second heat exchange element 12B and the second element frame 40B are adopted in the ventilator 10, the first seal member 51 is disposed between a bottom 12h of the recess 12g formed at the corner 12e and a distal end 44 of the protrusion 43. In this case, the first seal member 51 may be further disposed between the corner 12e and the side surface 42. The ventilator 10 according to the present embodiment, provided with the first seal member 51 between the second heat exchange element 12B and the second element frame 40B, can suppress mixing of the supply air SA and the exhaust air EA in the space generated between the recess 12g and the protrusion 43. In the ventilator 10 of the present disclosure, the first seal member 51 disposed between the second heat exchange element 12B and the second element frame 40B may be omitted.

[0081] In the ventilator 10 according to the present embodiment, the protrusion 43 may include an elastic body press-fittable into the recess 12g. In this case, by press-fitting the protrusion 43, which is an elastic body, into the recess 12g, a gap between the recess 12g and the protrusion 43 can be closed by the protrusion 43 itself without depending on the first seal member 51. In this case, the first seal member 51 disposed between the second heat exchange element 12B and the second element frame 40B can be omitted. Such a configuration can suppress air passing between the heat exchange element 12 and the element frame 40 without passing through the heat exchange element 12.

[0082] As shown in FIG. 9, when the second heat exchange element 12B and the second element frame 40B are adopted in the ventilator 10, the second seal member 52 is disposed between the frame body 41 and the holder 30 (holding member 35). The ventilator 10 according to the present embodiment, provided with the second seal member 52 between the second element frame 40B and the holder 30, can suppress air passing between the second element frame 40B and the holder 30 without passing through the second heat exchange element 12B. In the ventilator 10 of the present disclosure, the second seal member 52 provided between the second element frame 40B and the holder 30 may be omitted.

[0083] In the ventilator 10 according to the present embodiment, the second seal member 52 includes an elastic body. Such a configuration can reliably close a gap between the holder 30 and the second element frame 40B.

[0084] In the ventilator 10 according to the present embodiment, the second seal member 52 is integrally formed with the holder 30. The second seal member 52 is integrally formed with the holding member 35. The second seal member 52 is formed when the holding member 35 including resin is formed by using a general method of integrally forming different types of resins. The material included in the second seal member 52 is preferably a material less in hardness (softer) than the material included in the holding member 35. The ventilator 10 having such a configuration makes it possible to provide the second seal member 52 between the second element frame 40B and the holder 30.

[0085] In the ventilator 10 according to the present embodiment, the second element frame 40B includes resin. Such a configuration can suppress wear of the second seal member 52 which is an elastic body due to contact with the second element frame 40B. The material included in the second seal member 52 and the material included in the second element frame 40B are preferably substantially the same in hardness. By suppressing a difference in hardness between the two materials to be small in this manner, one of the materials is less likely to damage the other, and thus, wear of the second seal member 52 can be reliably suppressed.

[0086] As shown in FIGs. 9 and 10, in the ventilator 10 including the second heat exchange element 12B and the second element frame 40B, the frame body 41 is disposed closer to the holder 30 (holding member 35) than the corner 12e in the diagonal direction T (a first diagonal direction T1 and the second diagonal direction T2) of the heat exchange element 12 when viewed in the stacking direction. Therefore, in the ventilator 10 according to the present embodiment, the second element frame 40B does not cover the corner 12e of the second heat exchange element 12B. The ventilator 10 having such a configuration can reduce a ratio of a region of the second heat exchange element 12B through which the supply air SA and the exhaust air EA do not pass to a region through which the supply air SA and the exhaust air EA. In the ventilator 10 including the second heat exchange element 12B according to the present embodiment, a region that does not contribute to heat exchange in the second heat exchange element 12B can be reduced.(Third embodiment of element frame)

[0087] FIG. 12 is a general perspective view of a modification of the element frame. The element frame 40 in a case where the second heat exchange element 12B is adopted may have a form shown in FIG. 12. The element frame 40 shown in FIG. 12 is a modification of the second element frame 40B (see FIG. 11) described above, and is also referred to as third element frame 40C. As shown in FIG. 12, the third element frame 40C includes the frame body 41 and the protrusion 43 protruding from the side surface 42. The length of the third element frame 40C (protrusion 43) is the length L2 (see FIG. 12). The third element frame 40C is different from the second element frame 40B in that the protrusion 43 includes a ventilation hole 45 penetrating in a direction orthogonal to the protruding direction of the protrusion and an extending direction of the protrusion 43.

[0088] When the protrusion 43 is inserted into the recess 12g, a region where the supply air SA and the exhaust air EA do not pass is generated in the recess 12g by being blocked by the protrusion 43. Therefore, in the third element frame 40C according to the modification, the ventilation hole 45 penetrating the protrusion 43 in a direction orthogonal to the protruding direction from the side surface 42 and the extending direction of the protrusion 43 is provided. In the ventilator 10 including the third element frame 40C, the ventilation hole 45 allows a part of the recess 12g into which the protrusion 43 is inserted to be a region through which the supply air SA and the exhaust air EA can pass. It is therefore possible to reduce a ratio of a region of the second heat exchange element 12B through which the supply air SA and the exhaust air EA do not pass to a region through which the supply air SA and the exhaust air EA can pass.[Functional effects of embodiments]

[0089] (1) The ventilator 10 according to the above embodiment includes a casing 11 including the exhaust air passage 16 and a supply air passage 17, the exhaust fan 13 that is installed in the exhaust air passage 16 and generates a flow of the exhaust air EA (first air flow F1) in the exhaust air passage, the supply fan 14 that is installed in the supply air passage 17 and generates a flow of the supply air SA (second air flow F2) in the supply air passage 17, the heat exchange element 12 having a prismatic shape having a stacking structure in which the exhaust air ventilation passage 12c through which the exhaust air EA passes and the supply air ventilation passage 12d through which the supply air SA passes are stacked, the heat exchange element 12 causing the exhaust air EA and the supply air SA to exchange heat, the first side plate 15a that covers an end surface on a first side in a stacking direction of the heat exchange element 12 and a second side plate 15b that covers an end surface on a second side in the stacking direction of the heat exchange element 12, the element frame 40 that is disposed at each corner 12e of the heat exchange element 12 and extends in the stacking direction between the first side plate 15a and the second side plate 15b, and the holder 30 that is provided in the casing 11 and holds the element frame 40. In the ventilator 10 of the above embodiment, the element frame 40 includes the frame body 41. The frame body 41 is disposed closer to the holder 30 corresponding to the frame body 41 than the heat exchange element 12 in the diagonal direction T (the first diagonal direction T1 and the second diagonal direction T2) of the heat exchange element 12 when viewed in the stacking direction. In the ventilator 10 according to the above embodiment, the element frame 40 can reduce the range covering the corner 12e of the heat exchange element 12 as compared with the related art. Therefore, the ventilator 10 can reduce a ratio of a region of the heat exchange element 12 through which the supply air SA and the exhaust air EA do not pass to a region through which the supply air SA and the exhaust air EA. In the ventilator 10 according to the above embodiment, in the ventilator 10 including the heat exchange element 12, the region that does not contribute to heat exchange in the heat exchange element 12 can be reduced. (2) The ventilator 10 according to the above embodiment further includes the first seal member 51 provided between the heat exchange element 12 and the element frame 40. The ventilator 10 having the above configuration can suppress air passing between the heat exchange element 12 and the element frame 40 without passing through the heat exchange element 12. (3) The ventilator 10 according to the above embodiment further includes the second seal member 52 provided between the element frame 40 and the holder 30. The ventilator 10 having the above configuration can suppress air passing between the element frame 40 and the holder 30 without passing through the heat exchange element 12. (4) In the ventilator 10 according to the above embodiment, the length Q of the frame body in an extending direction of a first side of the heat exchange element 12 as viewed in the stacking direction is 10% or less of the length P of the first side of the heat exchange element 12 as viewed in the stacking direction. The ventilator 10 having the above configuration can suppress air flow resistance received by the exhaust air EA and the supply air SA due to the element frame 40. It is therefore possible to suppress a decrease in flow rates of the supply air SA and the exhaust air EA passing through the heat exchange element 12, and suppress a decrease in heat exchange efficiency in the ventilator 10. (5) In the ventilator 10 according to the present embodiment, the length L1 of the heat exchange element 12 in the stacking direction is smaller than the length L2 of the holder 30 (holding member 35). The ventilator 10 having the above configuration can suppress air passing while bypassing between the exhaust air passage 16 and the supply air passage 17 without passing through the heat exchange element 12. (6) In the ventilator 10 according to the above embodiment, the holder 30 holds the element frame 40 so as to be displaceable in the stacking direction of the heat exchange elements 12. In the ventilator 10 having the above configuration, the element frame 40 and the heat exchange element 12 can be slid along the holder 30 (holding member 35) when the heat exchange element 12 is taken in and out of the casing 11. As a result, in the ventilator 10 according to the above embodiment, the heat exchange element 12 can be easily taken in and out of the casing 11. (7) In the ventilator 10 according to the above embodiment, the second heat exchange element 12B has the recess 12g formed in the corner 12e along the stacking direction, and the second element frame 40B has the protrusion 43 that protrudes from the frame body 41 in the diagonal direction T toward the heat exchange element 12. In the ventilator 10 according to the above embodiment, the protrusion 43 is inserted into the recess 12g. In the ventilator 10 according to the above configuration, by inserting the protrusion 43 into the recess 12g, the second heat exchange element 12B can be easily held by the second element frame 40B, and the gap between the second heat exchange element 12B and the second element frame 40B can be closed. (8) In the ventilator 10 according to the above embodiment, the protrusion height H1 of the protrusion 43 from the frame body 41 is smaller than the height H2 of the frame body 41 in the protruding direction of the protrusion 43. When the protrusion 43 is inserted into the recess 12g, a region where the supply air SA and the exhaust air EA do not pass is generated in the recess 12g by being blocked by the protrusion 43. The ventilator 10 having the above configuration can suppress the protrusion height H1 of the protrusion 43, and thus, can reduce the ratio of the region of the recess 12g through which the supply air SA and the exhaust air EA do not pass of a region through which the supply air SA and the exhaust air EA can pass. (9) In the ventilator 10 according to the above embodiment, the protrusion height H1 of the protrusion 43 from the frame body 41 is larger than the depth D of the recess 12g in the diagonal directions T1 and T2. The ventilator 10 having the above configuration can reliably separate the side surface 42 of the frame body 41 from the corner 12e of the heat exchange element 12 in a state where the protrusion 43 is inserted into the recess 12g. Therefore, the ventilator 10 having the above configuration can reduce the ratio of a region of the heat exchange element 12 through which the supply air SA and the exhaust air EA do not pass to the region through which the supply air SA and the exhaust air EA. (10) In the ventilator 10 according to the above embodiment, the recess 12g may be a V-shaped groove. In this case, the recess 12g in the second heat exchange element 12B can be easily processed. (11) In the ventilator 10 according to the above embodiment, the protrusion 43 includes the ventilation hole 45 penetrating the protrusion 43 in a direction orthogonal to the protruding direction from the frame body 41 and the extending direction of the protrusion 43. In the ventilator 10 having the above configuration, the ventilation hole 45 allows a part of the recess 12g into which the protrusion 43 is inserted to be a region through which the supply air SA and the exhaust air EA can pass. It is therefore possible to reduce a ratio of a region of the second heat exchange element 12B through which the supply air SA and the exhaust air EA do not pass to a region through which the supply air SA and the exhaust air EA can pass. (12) When the second heat exchange element 12B is adopted in the ventilator 10 of the above embodiment, the first seal member 51 is disposed between the recess 12g and the protrusion 43. The ventilator 10 having the above configuration can suppress mixing of the supply air SA and the exhaust air EA in the space generated between the recess 12g and the protrusion 43. (13) In the ventilator 10 according to the above embodiment, the protrusion 43 includes an elastic body press-fittable into the recess 12g. If the protrusion 43 includes an elastic body as in the ventilator 10 having the above configuration, the gap between the recess 12g and the protrusion 43 can be closed by the protrusion 43 itself. The ventilator 10 having the above configuration can suppress air passing between the heat exchange element 12 and the element frame 40 without passing through the heat exchange element 12. (14) In the ventilator 10 according to the above embodiment, the second seal member 52 includes an elastic body. The ventilator 10 having the above configuration can reliably close the gap between the holder 30 and the element frame 40. (15) In the ventilator 10 according to the above embodiment, the element frame 40 includes resin. The ventilator 10 having the above configuration can suppress wear of the second seal member 52 due to contact with the element frame 40. (16) In the ventilator 10 according to the above embodiment, the second seal member 52 is integrally formed with the holding member 35 included in the holder 30. The ventilator 10 having the above configuration can provide the second seal member 52 between the element frame 40 and the holder 30.

[0090] The present disclosure should not be limited to the above exemplification, but is intended to include any change recited in the claims within meanings and a scope equivalent to those of the claims.REFERENCE SIGNS LIST

[0091] 10 ventilator 11 casing 12 heat exchange element 12A first heat exchange element 12B second heat exchange element 12c exhaust air ventilation passage 12d supply air ventilation passage 12e corner 12g recess 13 exhaust fan 14 supply fan 15a first side plate 15b second side plate 16 exhaust air passage 17 supply air passage 30 holder 40 element frame 40A first element frame 40B second element frame 40C third element frame 41 frame body 43 protrusion 45 ventilation hole 51 first seal member 52 second seal member EA exhaust air SA supply air F1 first air flow F2 second air flow P length of first side of heat exchange element Q length of frame body in extending direction of first side of heat exchange element L1 length of heat exchange element L2 length of holding member H1 protrusion height of protrusion from side surface H2 height of frame body in protruding direction of protrusion D depth of recess T diagonal direction

Claims

1. A ventilator (10) comprising: a casing (11) including an exhaust air passage (16) and a supply air passage (17); an exhaust fan (13) that is installed in the exhaust air passage (16) and generates an exhaust air flow (F1) in the exhaust air passage (16); a supply fan (14) that is installed in the supply air passage (17) and generates a supply air flow (F2) in the supply air passage (17); a heat exchange element (12) having a prismatic shape and having a stacking structure in which an exhaust air ventilation passage (12c) through which exhaust air passes and a supply air ventilation passage (12d) through which the supply air passes are stacked, the heat exchange element (12) causing the exhaust air and the supply air to exchange heat; a first side plate (15a) that covers an end surface on a first side and a second side plate (15b) that covers an end surface on a second side in a stacking direction of the heat exchange element (12); an element frame (40) that is disposed at each corner (12e) of the heat exchange element (12) and extends in the stacking direction between the first side plate (15a) and the second side plate (15b); and a holder (30) that is provided in the casing (11) and holds the element frame (40), wherein the element frame (40) includes a frame body (41), and the frame body (41) is disposed closer to the holder (30) corresponding to the frame body (41) than the heat exchange element (12) in a diagonal direction (T) of the heat exchange element (12) when viewed in the stacking direction.

2. The ventilator (10) according to claim 1, further comprising a first seal member (51) provided between the heat exchange element (12) and the element frame (40).

3. The ventilator (10) according to claim 1 or 2, further comprising a second seal member (52) provided between the element frame (40) and the holder (30).

4. The ventilator (10) according to claim 1 or 2, wherein a length (Q) of the frame body (41) in an extending direction of a first side of the heat exchange element (12) when viewed in the stacking direction is 10% or less of a length (P) of the first side of the heat exchange element (12) when viewed in the stacking direction.

5. The ventilator (10) according to claim 1 or 2, wherein a length of the heat exchange element (12) in the stacking direction is smaller than a length of the holder (30).

6. The ventilator (10) according to claim 1 or 2, wherein the holder (30) holds the element frame (40) so as to be displaceable in the stacking direction of the heat exchange element (12).

7. The ventilator (10) according to claim 2, wherein the heat exchange element (12B) has a recess (12g) formed at the corner (12e) along the stacking direction, the element frame (40B) has a protrusion (43) protruding from the frame body (41) in the diagonal direction (T) and in a direction toward the heat exchange element (12), and the protrusion (43) is inserted into the recess (12g).

8. The ventilator (10) according to claim 7, wherein a protrusion height (H1) of the protrusion (43) from the frame body (41) is smaller than a height (H2) of the frame body (41) in a protruding direction of the protrusion (43).

9. The ventilator (10) according to claim 7, wherein a protrusion height (H1) of the protrusion (43) from the frame body (41) is larger than a depth of the recess (12g) in the diagonal direction (T).

10. The ventilator (10) according to claim 7 or 8, wherein the recess (12g) is a V-shaped groove.

11. The ventilator (10) according to claim 7 or 8, wherein the protrusion (43) includes a ventilation hole (45) penetrating in a direction orthogonal to the protruding direction of the protrusion (43) from the side surface (42) and an extending direction of the protrusion (43).

12. The ventilator (10) according to claim 7 or 8, wherein the first seal member (51) is disposed between the recess (12g) and the protrusion (43).

13. The ventilator (10) according to claim 7 or 8, wherein the protrusion (43) includes an elastic body press-fittable into the recess (12g).

14. The ventilator (10) according to claim 3, wherein the second seal member (52) includes an elastic body.

15. The ventilator (10) according to claim 14, wherein the element frame (40) includes resin.

16. The ventilator (10) according to claim 3, wherein the second seal member (52) is formed integrally with the holder (30).

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