Ventilation system

Abstract

To provide a ventilation device to be installed outdoors for suppressing the entry of water droplets.SOLUTION: A ventilation device 1 to be installed outdoors for ventilate an indoor room via a duct 60 includes an air supply fan 42, and a casing 2 storing the air supply fan 42 and formed with an outside air intake port 5 for taking in outside air, the casing 2 including a top plate 2f forming the upper face of the casing 2, a side plate 2a forming part of the side face of the casing 2 and detachable from the casing 2, and a seal member 11 mounted to the back of the top plate 2f at a position where the top plate 2f and the side plate 2a cross each other and set into the state of abutting on the upper end of the side plate 2a or being compressed thereby to suppress the entry of droplets from between the top plate 2f and the upper end.SELECTED DRAWING: Figure 9

Description

[Technical field]

[0001] The present disclosure relates to a ventilation device that is installed outdoors. [Background technology]

[0002] As an indoor air ventilation device, a type that is installed above the ceiling is known (for example, see Patent Document 1). By communicating with the outdoors via a duct, this type of ventilation device can exhaust air from the room and supply air by taking in outside air into the room. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2002-22235 A Summary of the Invention [Problem to be solved by the invention]

[0004] In recent years, the importance of ventilation in buildings has increased from the viewpoint of public health. However, it is difficult to install a type of ventilation device that is installed in the ceiling of an existing building. In this regard, an outdoor-installation type ventilation device that communicates with the indoor space via a duct that penetrates the exterior wall and is exposed to the outdoors is easy to install. The ventilation device may have a total heat exchanger built in, and in order to replace the total heat exchanger periodically, for example, a structure that allows the side panels to be detached is required. However, a detachable structure is prone to gaps, and air may enter through unintended routes. In particular, there is a possibility that raindrops may enter the ventilation device along with the air from near the top panel.

[0005] The present disclosure aims to prevent water droplets from entering a ventilation device installed outdoors. [Means for solving the problem]

[0006] (1) The present disclosure relates to a ventilation device that is installed outdoors and ventilates a room through a duct, an intake fan; and a casing that houses the intake fan and has an outside air intake port that takes in outside air, The casing comprises: a top plate forming an upper surface of the casing; a side plate that forms a part of a side surface of the casing and is detachable from the casing; a sealing member that is attached to the underside of the top plate at a position where the top plate and the side plate intersect, and that is in contact with or compressed against the upper end of the side plate to prevent water droplets from entering between the top plate and the upper end; It is equipped with: Such a ventilation device can prevent water droplets from entering the inside of the ventilation device.

[0007] (2) In the ventilation device of (1) above, the sealing member is preferably made of a foam. In this case, the seal member is easily compressible and has a high restoring force.

[0008] (3) In the ventilation device of (2) above, the sealing member is formed, for example, from a closed-cell foam, and when the side plate is attached, the upper end of the side plate abuts against or is embedded in the sealing member. Closed-cell foams do not allow either air or water to pass through to the interior, so water infiltration can be prevented more reliably.

[0009] (4) In the ventilation device of (2), the sealing member is formed, for example, from a semi-closed cell or open cell foam, and when the side plate is attached, the upper end of the side plate penetrates into the sealing member by 10% to 70% of the thickness of the sealing member. Even in the case of a semi-closed cell or open cell foam, the penetration of water droplets can be suppressed by pressing at such a ratio.

[0010] (5) In the ventilation device according to any one of (1) to (4), for example, an inner casing is provided inside the casing, and the air supply fan is provided inside the inner casing. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a perspective view of a ventilation device according to an embodiment of the present disclosure. [Diagram 2] FIG. [Diagram 3] FIG. 2 is a front view showing the inside of the ventilation device. [Figure 4] FIG. 4 is a cross-sectional view taken along line AA in FIG. [Diagram 5] FIG. 4 is a cross-sectional view taken along line BB in FIG. [Figure 6] FIG. [Figure 7] FIG. 2 is a perspective view showing the ventilation device with the right side panel removed. [Figure 8] For reference, this is a schematic diagram showing a casing viewed from the front when a sealing member, which will be described later, is not used. [Figure 9] 1 is a schematic diagram of a casing viewed from the front when a sealing member according to the present disclosure is used. [Figure 10] 10 is a partial cross-sectional view of the area circled in the upper right corner of FIG. 9. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, embodiments of the present disclosure will be described.

[0013] <Overall structure of the ventilation system> Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. FIG. 1 is a perspective view of a ventilation device according to one embodiment of the present disclosure. In the following description, the terms up, down, front, rear, left, and right are used in accordance with the arrows shown with these terms in Figures 1 to 3. In particular, in Figure 1, the first direction indicated by the arrow X is the left-right direction, the second direction indicated by the arrow Y is the front-rear direction, and the third direction indicated by the arrow Z is the up-down (vertical) direction. However, these descriptions are merely examples, and for example, the first direction X may be read as the front-rear direction, and the second direction Y as the left-right direction.

[0014] The ventilation device 1 ventilates the indoor space by replacing outdoor (outdoor) air with indoor (room) air. The ventilation device 1 is installed outdoors in the position shown in FIG. 1. The ventilation device 1 is connected to the indoor space via a pair of ducts 60. The ventilation device 1 has a box-shaped casing 2 formed in a rectangular parallelepiped shape. The ventilation device 1 and the duct 60 constitute a ventilation facility 100.

[0015] The casing 2 has a bottom plate 2e, a top plate 2f, a right side plate 2a, a left side plate 2b, a front side plate 2c, and a rear side plate 2d. The bottom plate 2e and the top plate 2f are formed in a rectangular shape in a plan view and are arranged opposite each other with a gap in the vertical direction. The four sides of the bottom plate 2e and the top plate 2f are connected by the left and right side plates 2b, 2a and the front and rear side plates 2c, 2d, respectively.

[0016] A main return air intake 2r and a main supply air port 2s are provided on the top plate 2f of the casing 2. A joint 3 is attached to each of the main return air intake 2r and the main supply air port 2s, and one end of a duct 60 is connected to the joint 3. The other end of the duct 60 is connected to the indoors. Therefore, the main return air intake 2r and the main supply air port 2s communicate with the indoors via the pair of ducts 60.

[0017] A pair of legs 7 are provided on the bottom plate 2e of the casing 2. The legs 7 are placed on the ground and fixed with bolts or the like to install the ventilator 1 outdoors. The ventilator 1 is not limited to being installed on the ground, and may be installed on a stand attached to, for example, the outer wall or roof of a building.

[0018] A main outside air intake port 5 is formed in a right side plate 2a of the casing 2. A main exhaust port 6 is formed in a left side plate 2b of the casing 2.

[0019] <Ventilation device body> The casing 2 houses the ventilation device main body 10. The ventilation device main body 10 of the present embodiment is an indoor installation type ventilation device that has been conventionally installed in the ceiling or on a wall surface indoors. The ventilation device 1 of the present disclosure is an outdoor installation type ventilation device 1 that is configured by housing an indoor installation type ventilation device in a casing 2 designed for outdoor use. Since an indoor installation type ventilation device is not exposed to rain like an outdoor installation type ventilation device, waterproofing is not considered very much. Therefore, the ventilation device 1 of the present disclosure houses an indoor installation type ventilation device in a casing 2 that has excellent waterproofing, thereby enabling it to be installed outdoors. However, the ventilation device 1 of the present disclosure is not limited to one based on an indoor installation type ventilation device, and may be a ventilation device designed exclusively for outdoor installation.

[0020] FIG. 2 is a perspective view of the ventilator main body 10. As shown in FIG. The ventilation device main body 10 has a box-shaped inner casing 13 formed in a rectangular parallelepiped shape. The inner casing 13 essentially forms an accommodation space S for accommodating an intake fan 42, an exhaust fan 43, and a total heat exchanger 41 (see FIG. 3), which will be described later. The inner casing 13 has a bottom plate 13e, a top plate 13f, a right side plate 13a, a left side plate 13b, a front side plate 13c, and a rear side plate 13d. The bottom plate 13e and the top plate 13f are formed in a rectangular shape in a plan view, and are arranged opposite each other with a gap in the vertical direction. The four sides of the bottom plate 13e and the top plate 13f are connected by the left and right side plates 13b, 13a and the front and rear side plates 13c, 13d, respectively.

[0021] An electrical equipment unit 27 is provided on the upper portion of the right side plate 13a. The electrical equipment unit 27 has a box 27a and electrical components such as a control board and a terminal block housed in the box 27a. The electrical equipment unit 27 may be provided on the other side plates 13b, 13c, and 13d.

[0022] A sub-return air intake 14 and a sub-air supply port 17 are formed in a top plate 13f of the inner casing 13. The sub-return air intake 14 and the sub-air supply port 17 are provided with cylindrical bodies 14a and 17a, respectively.

[0023] The bottom plate 13e of the inner casing 13 constitutes a partition plate that partitions the lower end of the accommodation space S (FIG. 3) for accommodating the intake fan 42 (FIG. 4), the exhaust fan 43 (FIG. 5), and the total heat exchanger 41. The bottom plate 13e of the inner casing 13 is formed with an auxiliary outside air intake 16 and an auxiliary exhaust port 15. A cylindrical body 15a is attached to the auxiliary exhaust port 15. However, the cylindrical body 15a may be omitted.

[0024] <Internal structure of the ventilation system> Fig. 3 is a front view showing the inside of the ventilation device in a simplified manner, Fig. 4 is a cross-sectional view taken along line AA in Fig. 3, Fig. 5 is a cross-sectional view taken along line BB in Fig. 3. The tip openings of the cylinders 14a and 17a attached to the top plate 13f of the inner casing 13 are respectively connected to the main return air intake 2r and the main supply air intake 2s of the casing 2. Since an electrical equipment unit 27 is provided on the right side plate 13a of the inner casing 13, a gap T is formed between the right side plate 13a and the right side plate 2a of the casing 2, which is wider than the gap between the other opposing side plates. Note that such a gap T may be formed between the other opposing side plates.

[0025] A waterproof plate 21 is provided on the lower surface of the bottom plate 13e of the inner casing 13. The waterproof plate 21 is formed by, for example, applying a waterproof coating or surface treatment to a metal plate material, and is provided to impart waterproofness to the lower surface of the bottom plate 13e. The waterproof plate 21 covers the entire lower surface of the bottom plate 13e. The waterproof plate 21 has an opening 21a communicating with the secondary outside air intake 16 and an opening 21b communicating with the secondary exhaust port 15. The waterproof plate 21 has an extension portion 21c that extends from the bottom plate 13e to the right side plate 2a of the casing 2 and is disposed at a distance T. The extension portion 21c extends above the bottom plate 13e and reaches the right side plate 2a at a position higher than the bottom plate 13e.

[0026] The waterproof board 21 has a length in the front-rear direction that is approximately the same as the distance between the front plate 2c and the rear plate 2d of the casing 2. The waterproof board 21 has a length in the left-right direction that is approximately the same as the distance between the right plate 2a and the left plate 2b of the casing 2. The waterproof board 21 divides the space surrounded by the left and right side plates 2b, 2a and the front and rear side plates 2c, 2d into upper and lower parts, and prevents water from entering from the space below the waterproof board 21 to the space above. The waterproof board 21 may be formed from one member, or may be configured from a combination of multiple members.

[0027] Inside the casing 2, between the bottom plate (partition plate) 13e of the inner casing 13 and the bottom plate 2e of the casing 2, an outside air intake chamber 18 and an exhaust chamber 19 are formed. The outside air intake chamber 18 communicates with the main outside air intake port 5 and the auxiliary outside air intake port 16. The exhaust chamber 19 communicates with the main exhaust port 6 and the auxiliary exhaust port 15. The upper end of the outside air intake chamber 18 is also partitioned by a waterproof plate 21, and in this respect the waterproof plate 21 also constitutes a partition plate.

[0028] The outside air intake chamber 18 and the exhaust chamber 19 are divided into left and right sections by a partition plate 22. The partition plate 22 is disposed with a small gap between it and the bottom plate 2e of the casing 2, allowing water to flow on the bottom plate 2e between the outside air intake chamber 18 and the exhaust chamber 19.

[0029] The main return air intake 2r of the casing 2 and the auxiliary return air intake 14 of the inner casing 13 are used to take in air (return air) RA from indoors into the casing 2 and the inner casing 13. The main exhaust port 6, the exhaust chamber 19, and the auxiliary exhaust port 15 are used to discharge the return air RA taken into the casing 2 and the inner casing 13 to the outdoors as exhaust air EA. The main outside air intake 5, the outside air intake chamber 18, and the auxiliary outside air intake 16 are used to take in air (outside air) OA from outdoors into the casing 2 and the inner casing 13. The main supply air port 2s and the auxiliary supply air port 17 are used to supply the outside air OA taken into the casing 2 and the inner casing 13 to the indoors as supply air SA.

[0030] The main outside air intake 5 extends upward beyond the partition plate 13e from a range below the partition plate 13e on the right side plate 2a. The waterproof plate 21 extends from the lower surface of the partition plate 13e to the upper side of the upper end of the main outside air intake 5. In contrast, the main exhaust port 6 is formed in a range below the partition plate 13e on the left side plate 2b. Therefore, the area of ​​the main exhaust port 6 is smaller than the area of ​​the main outside air intake 5. However, the main exhaust port 6 may extend upward beyond the partition plate 13e from a range below the partition plate 13e, similar to the main outside air intake 5. Conversely, the main outside air intake 5 may be formed only in a range below the partition plate 13e. The main outside air intake 5 and the main exhaust port 6 are provided with protective nets 24, 26, respectively, as shown in Figures 1 and 3. The main outside air intake 5 is also provided with a filter 25.

[0031] A drain outlet 2g is formed in the bottom plate 2e of the casing 2. This drain outlet 2g is disposed in the exhaust chamber 19. A gradient is formed in the bottom plate 2e so that the drain outlet 2g is at the lowest point. Therefore, water present on the bottom plate 2e flows toward the drain outlet 2g and is discharged from the drain outlet 2g to the outside of the casing 2.

[0032] Inside the inner casing 13, a total heat exchanger 41, an intake fan 42, and an exhaust fan 43 are arranged. Inside the casing 2 and the inner casing 13, the return air RA taken in from the main return air intake 2r and the sub-return air intake 14 passes through the total heat exchanger 41, and is discharged as exhaust air EA to the outside of the inner casing 13 from the sub-exhaust port 15, the exhaust chamber 19, and the main exhaust port 6. Hereinafter, this air flow is also referred to as the "first air flow F1." The outside air OA taken in from the main outside air intake 5, the outside air intake chamber 18, and the sub-outside air intake 16 passes through the total heat exchanger 41, and is supplied as supply air SA to the inside of the building from the sub-air intake port 17 and the main air intake port 2s. Hereinafter, this air flow is also referred to as the "second air flow F2."

[0033] <Basic structure of a total heat exchanger> FIG. 6 is a perspective view of a total heat exchanger. The total heat exchanger 41 in this embodiment is an orthogonal type total heat exchanger configured so that a first air flow F1 and a second air flow F2 pass through almost perpendicularly. The total heat exchanger 41 has a partition plate 41a and a partition plate 41b. The partition plates 41a and the partition plates 41b are alternately laminated with an appropriate adhesive. The total heat exchanger 41 is formed into a substantially rectangular prism shape as a whole.

[0034] The partition plate 41a is heat-transmitting and moisture-permeable, and is formed in a flat plate shape. The partition plate 41a also has a property of allowing a refrigerant to pass therethrough. The partition plate 41b is formed in a corrugated shape with a substantially triangular cross section formed continuously. The partition plate 41b forms an air passage between two adjacent partition plates 41a. The partition plates 41b are stacked at an angle of 90 degrees each in the stacking direction of the partition plates 41a and 41b. As a result, an exhaust side passage 41c for passing the first air flow F1 and an intake side passage 41d for passing the second air flow F2 are formed on both sides of one partition plate 41a, which are perpendicular to each other. The air flowing through the exhaust side passage 41c and the air flowing through the intake side passage 41d exchange sensible heat and latent heat (total heat exchange) through the partition plate 41a having heat conductivity and moisture permeability.

[0035] <Ventilation system operation> As shown in Fig. 3 to Fig. 5, the inside of the inner casing 13 is divided into two areas, an indoor side (upper side in the inner casing 13) and an outdoor side (lower side in the inner casing 13), by the total heat exchanger 41. As shown in Fig. 3 and Fig. 5, an upstream exhaust air duct 46a is formed in the inner casing 13 on the upstream side of the first air flow F1 from the total heat exchanger 41, and a downstream exhaust air duct 46b is formed on the downstream side of the first air flow F1 from the total heat exchanger 41. The upstream exhaust air duct 46a and the downstream exhaust air duct 46b form an exhaust air duct 46 that communicates the indoors and the outdoors via the total heat exchanger 41.

[0036] 3 and 4, an upstream air supply duct 47a is formed in the inner casing 13 on the upstream side of the second air flow F2 from the total heat exchanger 41, and a downstream air supply duct 47b is formed in the inner casing 13 on the downstream side of the second air flow F2 from the total heat exchanger 41. The upstream air supply duct 47a and the downstream air supply duct 47b form an air supply duct 47 that communicates between the indoors and the outdoors via the total heat exchanger 41.

[0037] 3, a partition wall 51 is provided between the upstream exhaust air passage 46a and the downstream supply air passage 47b. A partition wall 52 is provided between the downstream exhaust air passage 46b and the upstream supply air passage 47a.

[0038] 3 and 5, in the downstream exhaust air duct 46b, an exhaust fan 43 is disposed near the sub-exhaust port 15. When the exhaust fan 43 is driven, a first air flow F1 is generated, and the return air RA from the indoors passes through the exhaust air duct 46 and is discharged to the outdoors as exhaust air EA.

[0039] 3 and 4, in downstream supply air duct 47b, supply air fan 42 is disposed near sub-air supply port 17. When supply air fan 42 is driven, a second air flow F2 is generated, and outdoor outside air OA passes through supply air duct 47 and is supplied indoors as supply air SA.

[0040] The ventilation operation is performed by driving the exhaust fan 43 and the supply fan 42. As a result, the return air RA from the indoors is exhausted to the outdoors, and the outdoor air OA from the outdoors is supplied to the indoors, thereby ventilating the indoors. Furthermore, the return air RA from the indoors and the outdoor air OA from the outdoors exchange sensible heat and latent heat in the total heat exchanger 41, suppressing changes in temperature and humidity indoors.

[0041] <<Detachable structure of total heat exchanger>> As shown in Fig. 2, the total heat exchanger 41 can be removed laterally (in the direction of the outline arrow) from the inner casing 13. The total heat exchanger 41 of this embodiment has a portion 41e protruding from the right side plate 13a, and a handle 41f is provided on this portion 41e. An operator can remove the total heat exchanger 41 from the inner casing 13 by holding the handle 41f and pulling the total heat exchanger 41 in the direction of the outline arrow. In Fig. 2, the symbol K denotes a spatial region which is a projection area of ​​the total heat exchanger 41 to the side (removal direction) and through which the total heat exchanger 41 passes when the total heat exchanger 41 is removed from the inner casing 13.

[0042] <Detachable side panel structure> FIG. 7 is a perspective view showing the state in which the right side plate 2a is removed from the ventilation device. The right side plate 2a of the ventilation device 1 can be easily attached and detached by fastening or removing a screw. When the right side plate 2a is removed, the right side surface of the casing 2 becomes an opening, and the right side of the inside of the casing 2 is exposed. Through this opening, the total heat exchanger 41 can be removed laterally from the inner casing 13 and the casing 2. By removing the total heat exchanger 41 from the inner casing 13 and the casing 2, maintenance and replacement of the total heat exchanger 41 can be easily performed. By removing the right side plate 2a of the casing 2, the electrical equipment unit 27 is also exposed to the outside, so that the electrical equipment unit 27 can be easily operated and maintained.

[0043] For example, a packing is provided on the back surface of the right side plate 2a or on the main body side of the casing 2. This can minimize the occurrence of gaps on the contact surfaces between the right side plate 2a and the main body side of the casing 2 when the right side plate 2a is attached to the main body side of the casing 2.

[0044] As shown in Fig. 7, there is an outside air intake chamber 18 below on the right side inside the casing 2. The space containing the outside air intake chamber 18 is separated from the space above it by a waterproof board 21. The presence of the waterproof board 21 prevents water from entering from the space below the waterproof board 21 to the space above. However, air can pass through even the smallest gaps, so the waterproof board 21 cannot ensure sufficient airtightness with respect to air.

[0045] When the air supply fan 42 is operated with the right side plate 2a attached to the main body of the casing 2, the space in which the outside air intake chamber 18 is located becomes negative pressure, and outside air is sucked in through the main outside air intake 5. Ideally, only the space in which the outside air intake chamber 18 is located becomes negative pressure. However, as described above, the waterproof plate 21 cannot ensure sufficient airtightness, so the space above the waterproof plate 21 also becomes negative pressure. As a result, air may be sucked in through the gap between the right side plate 2a facing the space above the waterproof plate 21 and the main body of the casing 2. When air is sucked in, there is a possibility that water droplets from rain may also enter.

[0046] 8 is a schematic diagram of the casing 2 as viewed from the front, for reference, when a sealing member, which will be described later, is not used. The casing 2 excluding the right side plate 2a is the main body 2M of the casing 2. An enlarged cross-sectional view of the part circled in the lower right of the figure is also shown.

[0047] When attaching the right side plate 2a, the worker inserts the upper end of the right side plate 2a inside the top plate 2f, touches the right side plate 2a against the main body 2M of the casing 2, and lifts it up slightly. Then, for example, the hook 2j fixed to the right side plate 2a is hooked onto the support 2h provided on the main body 2M. In this state, the right side plate 2a is temporarily fixed to the main body, and the right side plate 2a will not fall even if the worker releases it. Now, the worker fixes the right side plate 2a to the main body of the casing 2 using a screw.

[0048] To enable such installation, a small gap is required between the upper end of the right side panel 2a and the underside of the top panel 2f so that the right side panel 2a can be raised slightly above its fixed position. However, when the air supply fan 42 is operated after the right side panel 2a is installed, air enters through the gap. As a result, water droplets are likely to enter through the side of the top panel 2f where rainwater drips. Therefore, the following configuration is adopted.

[0049] <Sealing structure> FIG. 9 is a schematic diagram of the casing 2 when the sealing member 11 of the present disclosure is used, as viewed from the front. FIG. 10 is a partial cross-sectional view of the area circled in the upper right corner of FIG. 9. The sealing member 11 is attached to the back side along the right side of the top plate 2f when viewed from above, and extends in the front-rear direction (FIG. 1). The cross-sectional shape of the sealing member 11 in a free state is rectangular or square. The sealing member 11 is, for example, a foam foamed using synthetic rubber or resin as a base material. The sealing member 11 includes closed-cell foam and non-closed-cell foam. The sealing member 11 is rich in elasticity and recovery, and has high sealing performance.

[0050] In FIG. 9, when attaching the right side plate 2a, the worker inserts the upper end of the right side plate 2a into the inside of the top plate 2f, presses the upper end against the seal member 11, and lifts it up a little. As a result, as shown in FIG. 10, the seal member 11 is recessed and adheres closely to the upper end of the right side plate 2a to exhibit sealing performance. Then, as shown in FIG. 8, the hook 2j fixed to the right side plate 2a is hooked on the support part 2h provided on the main body part 2M. At this time, the right side plate 2a is in a state where the lower part is temporarily fixed to the main body part, and the upper part is pressed downward by the elastic force of the seal member 11, and is stable. Even if the worker releases his / her hand, the right side plate will not fall and will not rattle. Here, the worker fixes the right side plate 2a to the main body part of the casing 2 using a screw.

[0051] In this manner, a sealing structure is provided by the upper end of the right side plate 2a and the sealing member 11, thereby making it possible to prevent water droplets from entering through this portion. The closed-cell seal member 11 has particularly excellent sealing performance. The semi-closed-cell or open-cell seal member 11 exhibits sufficient sealing performance by being compressed more than the closed-cell seal member.

[0052] 10, the compression ratio (=compressed dimension x / thickness t) of the seal member 11 to obtain suitable sealing performance is theoretically possible for closed cells even at 0%, but a few percent to less than 10% is sufficient. The seal member 11 with semi-closed cells or open cells can obtain suitable sealing performance with a compression ratio of 10% to 70%.

[0053] 10 shows a configuration in which the seal member 11 is provided at the position where the upper end of the right side plate 2a comes into contact, but the seal member 11 may be attached to the entire back surface of the top plate 2f. By attaching the seal member 11 to the entire back surface of the top plate 2f, it is possible to prevent water droplets from entering between the upper ends of the other side plates (2b, 2c, 2d) and the top plate 2f, and to prevent condensation on the back side of the top plate 2f when snow accumulates on the top plate 2f, for example.

[0054] Disclosure Summary The above disclosure, particularly with regard to the sealing structure between the top plate 2f and the upper end of the right side plate 2a, can be generalized and expressed as follows. Note that since the ventilation device 1 can be configured symmetrically to FIG. 1, the sealing structure may be between the top plate 2f and the upper end of the left side plate. Hereinafter, this will be simply referred to as the side plate 2a.

[0055] A ventilation device 1 that is installed outdoors and ventilates a room through a duct 60 includes an intake fan 42 and a casing 2 that houses the intake fan 42 and has an outside air intake 5 that takes in outside air. The casing 2 includes a top plate 2f that forms the upper surface of the casing 2, a side plate 2a that forms part of the side surface of the casing 2 and is detachable from the casing, and a seal member 11. The seal member 11 is attached to the back surface of the top plate 2f at the position where the top plate 2f and the side plate 2a intersect, and is in contact with or compressed against the upper end of the side plate 2a, thereby preventing water droplets from entering between the top plate 2f and the upper end.

[0056] In such a ventilation device 1, there is a space in the casing 2 where negative pressure occurs due to the operation of the intake fan 42, and outside air may be drawn in through an unintended path. Therefore, when the side plate 2a is attached to the casing 2, the upper end of the side plate 2a is in contact with the seal member 11 or the seal member 11 is in a compressed state. This brings the upper end of the side plate 2a into close contact with the seal member 11, resulting in a structure that suppresses the intake of outside air through the close contact area. Therefore, it is possible to suppress water droplets from entering the ventilation device 1 as outside air is sucked in.

[0057] The seal member 11 is preferably made of a foam. Such a seal member 11 is easily compressible and has a high restoring force, so that the seal performance can be maintained for a long period of time.

[0058] When the seal member 11 is made of a closed-cell foam, the upper end of the side plate 2a may be in contact with or bit into the seal member 11 when the side plate 2a is attached. Since closed-cell foam does not allow air to pass through to the inside, the necessary sealing performance can be ensured even by pressing it just slightly against the sealing material. If it is pressed into the sealing material so that it bites into it, the infiltration of water droplets can be prevented even more reliably.

[0059] When the sealing member 11 is formed from a semi-closed cell or open cell foam, it is preferable that when the side plate 2a is attached, the upper end of the side plate 2a is embedded into the sealing member 11 by 10% to 70% of the thickness of the sealing member 11. Semi-closed cell or open cell foam allows air to pass through to the inside, but by pressing at such a ratio, it is possible to suppress the infiltration of water droplets.

[0060] In the above-described ventilation device 1, an inner casing 13 is provided inside the casing 2, and the intake fan 42 is provided inside the inner casing 13. In the case of such a double casing configuration, a space is created inside the device between the outer casing 2 and the inner casing 13, and operation of the intake fan 42 may result in the creation of a gap through which outside air may be sucked in and water droplets may enter. In such a situation, the seal structure of the present disclosure is particularly useful.

[0061] 《Addendum》 Although the embodiments have been described above, it will be understood that various changes in form and details can be made without departing from the spirit and scope of the claims. [Explanation of symbols]

[0062] 1: ventilation device, 2: casing, 2a: right side panel, 2b: left side panel, 2c: front panel, 2d: rear panel, 2e: bottom panel, 2f: top panel, 2g: drain, 2h: support, 2j: hook, 2M: main body, 2r: main return air intake, 2s: main supply air outlet, 3: joint, 4: screw, 5: main outside air intake, 6: main exhaust port, 7: legs, 10: ventilation device main body Body, 11: Seal member, 13: Inner casing, 13a: Right side plate, 13b: Left side plate, 13c: Front side plate, 13d: Rear side plate, 13e: Bottom plate, 13f: Top plate, 14: Sub-return air intake, 14a: Cylindrical body, 15: Sub-exhaust port, 15a: Cylindrical body, 16: Sub-outside air intake, 17: Sub-air supply port, 17a: Cylindrical body, 18: Outside air intake chamber, 19: Exhaust chamber, 21: waterproof board, 21a, 21b: opening, 21c: extension, 22: partition board, 24: protective net, 25: filter, 26: protective net, 27: electrical equipment unit, 27a: box, 41: total heat exchanger, 41a: partition board, 41b: bulkhead board, 41c: exhaust side passage, 41d: intake side passage, 41e: (protruding) part, 41f: handle, 42: intake fan, 43: exhaust fan, 46: exhaust air duct, 46a: upstream exhaust air duct, 46b: downstream exhaust air duct, 47: intake air duct, 47a: upstream intake air duct, 47b: downstream intake air duct, 51: partition wall, 52: partition wall, 60: duct, 100: ventilation equipment, F1: first air flow, F2: second air flow, S: storage space

Claims

1. A ventilation device (1) that is installed outdoors and ventilates a room through a duct (60), An intake fan (42); A total heat exchanger (41); a casing (2) that houses the air supply fan (42) and the total heat exchanger (41) and has an outside air intake (5) that takes in outside air, The casing (2) is A top plate (2f) forming an upper surface of the casing (2); A side plate (2a) that forms a part of a side surface of the casing (2) and is detachable from the casing (2); a sealing member (11) that is attached to the underside of the top plate (2f) at a position where the top plate (2f) and the side plate (2a) intersect, and that is compressed at the upper end of the side plate (2a) to suppress the intrusion of water droplets from between the top plate (2f) and the upper end, The side plate (2a) has a hook (2j), The casing (2) has a support portion (2h) for hooking the hook (2j), The hook (2j) is hooked onto the support portion (2h) from above in a state in which the seal member (11) is compressed upward by the upper end of the side plate (2a).

2. 2. The ventilation device according to claim 1, wherein the sealing member (11) is made of a foam.

3. The sealing member (11) is formed of a closed-cell foam, 3. The ventilation device according to claim 2, wherein an upper end of the side plate (2a) is bitten into the seal member (11) when the side plate (2a) is attached.

4. The sealing member (11) is formed of a semi-closed cell or open cell foam, The ventilation device according to claim 2, wherein, when the side plate (2a) is attached, the upper end of the side plate (2a) is embedded into the seal member (11) by 10% to 70% of the thickness of the seal member (11).

5. 5. The ventilation device according to claim 1, wherein an inner casing (13) is provided inside the casing (2), and the air supply fan (42) is provided inside the inner casing (13).

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