JP6681789B2 - Drain drainage - Google Patents

Description

  The present invention relates to a drainage device.

  In an air conditioner (hereinafter, referred to as an air conditioner), steam contained in air sent by a blower is condensed in a heat exchanger to generate drain water. A drainage pipe is provided in the air conditioner, and drain water is drained through the water distribution pipe.

  Normally, the inlet of the water distribution pipe is on the blower side of the air conditioner, so the atmospheric pressure is higher than the outlet of the water distribution pipe. Therefore, the drain water flows from the inlet to the outlet of the water distribution pipe due to the pressure difference. However, when an air conditioner is installed in a railroad vehicle, when the vehicle passes through a tunnel, the air pressure outside the vehicle may suddenly become higher than the air pressure inside the vehicle. In that case, the air pressure at the inlet of the water pipe becomes lower than the air pressure at the outlet, and the drain water cannot be drained by the water pipe. Therefore, a drain drainage device that drains drain water regardless of changes in atmospheric pressure has been developed.

  For example, in Patent Document 1, an air passage that guides a part of the air sent by the blower to the drain discharge port and a throttle portion provided in the air passage are provided, and the throttle portion negatively pressurizes the air in the air passage. A drain drainage device that drains drain water at a drain outlet using pressure is disclosed.

JP 2001-239825A

  In the drain drainage device of Patent Document 1, the space inside the vehicle and the space outside the vehicle are connected by the air passage provided at the drain discharge port. Therefore, when the pressure difference between the inside and outside of the vehicle suddenly changes, such as when the vehicle passes through a tunnel as described above, drain water cannot be drained sufficiently, drain water stops draining, and drain water flows back into the vehicle. May occur. In that case, dust outside the vehicle may enter the inside of the vehicle.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a drain drainage device that can prevent backflow of drain water and intrusion of dust from the outside.

  In order to achieve the above object, the drainage drainage device according to the present invention is provided at the casing bottom in the air conditioner, and is attached so as to cover the drainage drainage port for draining the drainage water accumulated at the casing bottom. The drain drainage device includes a top plate portion and a side wall portion formed along the outer periphery of the top plate portion on one side of the top plate portion and attached to the casing bottom so as to surround the drain drainage port. The side wall portion has an opening that penetrates the side wall portion and drains drain water from the casing bottom to the drain drain port, and a valve that opens and closes the opening. Also, the valve has a shaft member provided on the side wall portion above the opening, and has an upper end swingably supported by the shaft member, and has a size that covers the opening when swinging toward the opening. The plate-shaped valve body is formed, and the side wall is formed. When the plate-shaped valve body swings toward the opening, the plate-shaped valve body inclines toward the drain outlet side from the bottom of the shaft member toward the casing bottom. Is provided on the opening side surface of the plate-shaped valve body and the inclined surface that receives the plate-shaped valve body, and when the plate-shaped valve body is received by the inclined surface, it adheres to the inclined surface at the peripheral edge of the opening. And packing.

  According to the present invention, in the drain drainage device including the top plate portion and the side wall portion, since the valve opens and closes the opening penetrating the side wall portion, when a difference in atmospheric pressure occurs inside and outside the air conditioner to which the drain drainage device is attached. However, by closing the valve, it is possible to prevent the reverse flow of drain water and the ingress of dust from the outside.

  In the drain drainage device, the opening penetrates the side wall, and the shaft member that supports the valve body of the valve is provided on the opening. Further, the side wall portion is provided with an inclined surface that receives the valve body when the plate-shaped valve body swings toward the opening side. Therefore, when the air pressure inside or outside the drain outlet is higher than the air pressure in the vicinity of the opening, the valve body is pressed against the inclined surface by the force due to the difference in air pressure. As a result, in the drain drainage device, the valve can be automatically closed according to the pressure difference. In that case, since the packing of the valve body is pressed against the inclined surface, the opening can be reliably sealed.

  Further, the valve body is provided above the opening, the upper end of which is swingably supported by the shaft member, and the inclined surface is inclined toward the drain drain port side from below the shaft member toward the casing bottom. Therefore, even if there is no difference between the atmospheric pressure inside or outside the drainage outlet and the atmospheric pressure near the opening, the valve body will continue to oscillate to the inclined surface due to the weight of the valve body, and the valve may remain closed. it can. Drain drainage device of the present invention, the external pressure is higher than or equal to the atmospheric pressure in the vicinity of the opening, even when the reverse flow of the drain water or dust from the outside is likely to occur, the valve is closed and the reverse flow of the drain water or It is possible to prevent dust from entering from the outside.

It is sectional drawing which shows the drain drainage apparatus which concerns on Embodiment 1 of this invention. It is a front view which shows a drain drainage device. It is sectional drawing which shows the AA cross section in FIG. It is sectional drawing which shows a drain drainage device when a valve opens. It is a front view which shows the drain drainage apparatus which concerns on Embodiment 2 of this invention. It is sectional drawing which shows the BB cross section in FIG. It is sectional drawing which shows the CC cross section in FIG. It is sectional drawing which shows a drain drainage device when a valve closes. It is sectional drawing which shows a drain drainage device when a valve opens. FIG. 8 is another cross-sectional view showing the drain drainage device when the valve is opened. FIG. 7 is another cross-sectional view showing the drain drainage device when the valve is closed. It is sectional drawing which shows the drain drainage apparatus which concerns on other embodiment. It is sectional drawing which shows the modification of packing. It is sectional drawing which shows the modification of a shaft member and a valve body.

  Hereinafter, a drain drainage device according to an embodiment of the present invention will be described in detail with reference to the drawings. In the drawings, the same or equivalent parts are designated by the same reference numerals.

(Embodiment 1)
The drain drainage device 1 according to the first embodiment is a device attached to a drain drainage port 113 provided in a casing 110 of an air conditioner 100, as shown in FIG. 1.

  The air conditioner 100 to which the drainage device 1 is attached includes a casing 110 provided with an intake port 111 and an exhaust port 112, a blower 120 and a heat exchanger 130 housed in the casing 110. In the air conditioner 100, as the fan of the blower 120 rotates, air is taken in through the intake port 111 as shown by the arrow 200. The air taken in is sent to the heat exchanger 130 as shown by an arrow 210, and after heat exchange, is discharged from the exhaust port 112 as shown by an arrow 220. At this time, when the air is cooled by the heat exchanger 130 and the steam contained in the air is condensed, drain water is generated and the drain water is collected at the bottom of the casing 110.

  Therefore, a drain drain port 113 for discharging drain water is provided at the bottom of the casing 110. The drain drain port 113 is a hole that vertically penetrates the bottom of the casing 110, and is provided at a position corresponding to between the blower 120 and the heat exchanger 130. Since the drain drain port 113 is located on the upstream side of the heat exchanger 130 in the air flow, a positive pressure is applied to the drain water, and the drain water is efficiently drained from the drain drain port 113. The drain drainage device 1 according to the present embodiment is a device that is attached so as to cover the drain drainage port 113 in order to drain this drain water.

  As shown in FIGS. 2 and 3, the drainage drainage device 1 is a bottomless box-shaped device having a rectangular parallelepiped overall shape. More specifically, as shown in FIG. 3, the drainage drainage device 1 is composed of a top plate portion 10 corresponding to the top plate of the box and side wall portions 20 corresponding to the four side plates of the box.

  The top plate portion 10 has a rectangular shape that is larger than the opening of the drain drain port 113 along with the width and the length thereof so that the drain drain port 113 can be covered. Further, the top plate portion 10 is formed of a water impermeable material so as to block the drain water when it flows backward. The top plate portion 10 is arranged parallel to the bottom of the casing 110 and above the drain drain port 113. As a result, the top plate portion 10 prevents the drain water and the dust from scattering into the air conditioner 100 when the drain water flows backward from the drain drain port 113 or when dust enters.

  The tip of the side wall portion 20 extends from the peripheral edge of the top plate portion 10 on one side of the top plate portion 10 and in the direction perpendicular to the top plate portion 10. The tip of the side wall portion 20 is fixed to the bottom of the casing 110 by, for example, a fastener so that the space surrounded by the side wall portion 20 surrounds the drain drain port 113. The side wall portion 20 is formed of an impermeable material so as to block the flow of drain water, like the top plate portion 10. The side wall portion 20 prevents the drain water and the dust from scattering in the air conditioner 100, similarly to the top plate portion 10.

  On the other hand, the side wall portion 20 is formed with an opening 24 for draining drain water. As described above, the side wall portion 20 corresponds to the four side plates of the box of the drainage drainage device 1. The opening 24 is provided in the side surface plate 21 of the four side surface plates, which is arranged on the blower 120 side.

  The opening 24 is a rectangular hole that penetrates from the front end portion of the side plate 21 on the bottom side of the casing 110 to the middle portion. As described above, a positive pressure is applied to the drainage device 1. Due to the atmospheric pressure, the drain water in the vicinity of the opening 24 is guided from the opening 24 to the drain drain port 113 side in the space surrounded by the side wall 20. The opening 24 allows drain water to pass through inside the box of the drain drainage device 1. As a result, the drain water is drained from the drain drain port 113.

  When the air conditioner 100 is attached to a railroad vehicle, when the vehicle passes through a tunnel, the difference between the atmospheric pressure inside and outside the vehicle may suddenly change. Therefore, if the opening 24 is always open, drain water may flow back from the outside of the air conditioner 100 into the air conditioner 100, or dust outside the air conditioner 100 may enter the air conditioner 100. As a result, drain water or dust may be scattered into the vehicle via the air conditioner 100. Therefore, the drain drainage device 1 is provided with a valve 30 that opens and closes the opening 24 in order to prevent backflow of the drain water and entry of dust.

  The valve 30 includes a shaft member 31 provided on the side plate 21 on the opening 24, a valve body 32 that swings around the shaft member 31 to open and close the opening 24, and a shaft member 31 below the shaft member 31. The inclined wall portion 23 is provided to receive the valve body 32 when the valve body 32 swings toward the opening 24 side, and the packing 33 provided to the valve body 32.

  The shaft member 31 is a member corresponding to the shaft of the hinge, and is provided above the opening 24 of the side plate 21 and inside the box of the drainage drainage device 1.

  The valve body 32 is configured by a rectangular plate-shaped body having a width and a length larger than that of the opening 24. The upper end of the valve element 32 is rotatably supported by the shaft member 31. The weight of the valve element 32 is such that when the upper end is rotatably supported, the lower end hangs down by its own weight. When no force is applied to the valve body 32, the valve body 32 stands still by its own weight with the lower end of the valve body 32 positioned below the upper end of the valve body 32. This causes the valve 30 to close. On the other hand, when a force is applied, the valve body 32 swings around the shaft member 31 on the upper end side, and the lower end moves laterally and upward. This opens the valve 30.

  The valve body 32 is formed of an impermeable material, like the top plate portion 10 and the side wall portion 20. The valve body 32 blocks the flow of drain water when the valve 30 is closed.

  The inclined wall portion 23 is formed by bending the side surface plate 21 at the bending portion 22. The side plate 21 is bent in the direction toward the drain drain port 113 side toward the bottom of the casing 110, that is, toward the inside of the box of the drain drainage device 1 toward the bottom side. The bending angle is 15 °.

  The above-mentioned opening 24 is formed in the inclined wall portion 23. A shaft member 31 is provided on the opening 24 of the inclined wall portion 23. Since the inclined wall portion 23 inclines toward the inside of the box of the drainage drainage device 1 as it goes downward, when the valve body 32 stands still without being applied with force, the inclined wall portion 23 is The valve body 32 is received and the valve body 32 is supported from below.

  The packing 33 has a plate shape, and like the valve element 32, is formed in a rectangular shape having a width and a length larger than that of the rectangular opening 24. The packing 33 is fixed to the surface of the valve body 32 on the opening 24 side. The packing 33 is formed of a flexible material so that it is deformed by the pressure of the valve body 32 when the valve 30 is closed. The packing 33 is made of, for example, natural rubber, rigid rubber, or cloth. The packing 33 is pressed against the inclined wall portion 23 by the valve body 32 when the valve 30 is closed. In this case, the packing 33 deforms and comes into close contact with the inclined wall portion 23, and as a result, seals the opening 24.

  Next, the operation of the drainage drainage device 1 will be described. When the air conditioner 100 is stopped and the fan of the blower 120 is not rotating, there is no difference in the air pressure inside and outside the vehicle, and as a result, the air pressure near the opening 24 of the drain drainage device 1 and the air pressure inside the drain drainage port 113. There is no difference in. The valve element 32 hangs down from the shaft member 31 and is supported by the inclined wall portion 23 from below. As a result, the valve 30 is closed as shown in FIG. The packing 33 is pressed against the inclined wall 23 by the weight of the valve body 32, and the opening 24 is sealed. In this case, dust outside the vehicle does not enter the air conditioner 100 and the inside of the vehicle through the drain drain port 113.

  When the air conditioner 100 is operated, the fan of the blower 120 rotates and a difference in atmospheric pressure occurs inside and outside the vehicle. The air pressure in the vicinity of the opening 24 becomes higher than the air pressure in the drain drain port 113, and the valve body 32 is pushed to the inside of the box of the drain drain device 1 by the difference in the air pressure. When the force exceeds the own weight of the valve body 32, the valve body 32 separates from the inclined wall portion 23 and the valve 30 opens, as shown in FIG.

  When drain water is generated during the operation of the air conditioner 100, the drain water is collected at the bottom of the casing 110. The drain water is discharged to the drain drain port 113 through the opening 24 in which the valve 30 is opened, as shown by an arrow 230 in FIG.

  When the air pressure near the opening 24 is increased by the blower 120 and the water pressure of the drain water is increased by the air pressure, the water pressure exceeds the dead weight of the valve body 32. In that case, the valve body 32 is pushed inside the box of the drainage device 1, and as a result, the valve 30 opens. Even if the drain water pressure becomes high, the drain water is discharged to the drain drain port 113.

  When the vehicle passes through the tunnel and the atmospheric pressure outside the vehicle becomes higher than the atmospheric pressure inside the vehicle while the air conditioner 100 is operating, the atmospheric pressure near the opening 24 becomes lower than the atmospheric pressure inside the drain drain port 113. The valve body 32 is pushed to the outside of the box of the drainage device 1, and as a result, the valve body 32 contacts the inclined wall portion 23 and the valve 30 is closed. Since the valve 30 is closed, the drain water in the drain drain port 113 does not flow back into the air conditioner 100, and dust outside the vehicle does not enter the air conditioner 100 through the drain drain port 113.

  As described above, the drainage device 1 according to the first embodiment includes the top plate portion 10 that covers the drain drainage port 113 from above, and the side wall portion 20 that surrounds the drainage drainage port 113 and supports the top plate portion 10. ing. In the drainage drainage device 1, since the top plate portion 10 and the side wall portion 20 surround the drainage drain port 113, even if drain water flows back from the drainage drain port 113 or dust enters, the drain water and dust will not be discharged. Difficult to scatter in the air conditioner 100.

  The side wall portion 20 is provided with an opening 24 that penetrates the side wall portion 20 and drains drain water to the drain drain port 113, and a valve 30 that opens and closes the opening portion 24. In the drainage device 1, by closing the valve 30, it is possible to prevent backflow of the drain water of the air conditioner 100 and intrusion of dust from the outside. Further, the opening 24 and the valve 30 are provided in the side wall portion 20, and the opening 24 and the valve 30 do not face the drain drain port 113. Therefore, in the drain drainage device 1, it is difficult for backflow drain water and dust to enter the opening 24.

The valve 30 has a shaft member 31 provided on the surface of the side wall portion 20 on the drain drain port 113 side above the opening 24, and has an upper end swingably supported by the shaft member 31, and has a length and a width. The valve body 32 is formed in a rectangular shape larger than the opening portion 24, covers the opening portion 24 when swinging toward the opening portion 24 side, and is formed on the side wall portion 20, and goes downward from below the shaft member 31. The sloped wall portion 23 that tilts in the direction toward the inside of the box of the drainage device 1 and receives the valve body 32 when the valve body 32 swings toward the opening portion 24 and the valve body 32 on the opening portion 24 side. The packing 33 is provided and has a length and a width that are larger than the opening 24. In the drainage device 1, when the air pressure outside the air conditioner 100 becomes higher than the air pressure in the vicinity of the opening 24, the valve body 32 swings around the shaft member 31 due to the difference in the air pressure, and the inclined wall portion 23. Can be pressed against. As a result, the valve 30 can be automatically closed. In that case, since the packing 33 of the valve body 32 is also pressed against the inclined wall portion 23, the drainage drainage device 1 can reliably seal the opening 24.
Conventionally, some air conditioners have an electrical component, for example, a pump that drains drain water. However, the drain drainage device 1 includes the valve 30 described above. Therefore, in the drain drainage device 1, drain water can be drained without using electric parts.

  Further, even when there is no difference in atmospheric pressure between the air pressure outside the air conditioner 100 and the air pressure in the vicinity of the opening 24, the valve body 32 remains stationary while swinging to the inclined wall portion 23 due to the weight of the valve body 32, and the valve 30 Can be closed. When the atmospheric pressure outside the air conditioner 100 is higher than or equal to the atmospheric pressure in the vicinity of the opening 24, the backflow of drain water and the intrusion of dust from the outside are likely to occur. However, even in such a case, the drain drainage device 1 can close the valve 30 and prevent backflow of the drain water and intrusion of dust from the outside.

  In the drainage drainage device 1, the top plate portion 10 is mounted parallel to the bottom of the casing 110, and the side wall portion 20 is mounted vertically. Even if the dust enters from the drain drain port 113 when the valve 30 is closed, the dust collides with the top plate portion 10 and does not directly collide with the side wall portion 20 provided with the valve 30. Therefore, in the drainage device 1, dust is unlikely to adhere to the valve 30. As a result, the ingress of dust can be further prevented.

(Embodiment 2)
As described above, drain water collects at the bottom of the casing 110 of the air conditioner 100. When the valve 30 of the drain drainage device 1 is opened and closed with the drain water accumulated, the drain water is splashed by the valve body 32 and the packing 33 of the valve 30. As a result, drain water may be scattered in the casing 110 of the air conditioner 100. Further, the scattered drain water may leak from the exhaust port 112 of the casing 110 into the vehicle due to the wind of the blower 120.

  Further, since the air conditioner 100 takes in the air inside the vehicle from the intake port 111 of the casing 110, the dust inside the vehicle enters the casing 110 and collects at the bottom of the casing 110. Since the valve 30 of the drain drainage device 1 has a structure in which the valve body 32 and the packing 33 are only swung, dust enters the drain drainage device 1 and the drain drain port 113 together with the drain water. As a result, dust may collect in the drain drainage device 1 and in the drain drain port 113, blocking the drain water drainage path.

  Therefore, in the drainage drainage device 1 according to the second embodiment, as shown in FIGS. 5 to 8, a shield plate 40 that prevents the drainage water from scattering and a filter 50 that prevents dust from entering the drainage drainage device 1. And are equipped with. The configuration different from that of the first embodiment will be described below.

  As shown in FIGS. 6 and 7, the shielding plate 40 is attached to the entrance side of the opening 24, that is, on the side of the opening 24 opposite to the space surrounded by the side wall portion 20. The shield plate 40 is lateral to the opening 24 and faces the side plate 21 and the inclined wall 23 in which the opening 24 is formed. The shield plate 40 is formed in a rectangular shape whose length and width are larger than the opening 24, and covers the opening 24 at a position apart from the opening 24.

  The shielding plate 40 is made of a water impermeable material and does not allow water to pass therethrough. When the valve body 32 of the valve 30 and the packing 33 splash the drain water, the shielding plate 40 blocks the splash path of the water 400 and scatters into the casing 110, as shown by arrows 240 to 242 in FIG. Prevent that.

  As shown in FIGS. 5 to 8, the filter 50 is formed in a U shape in plan view. The U-shaped filter 50 in plan view has a size such that a box constituted by the four side plates of the side wall portion 20 can be loosely inserted therein. The filter 50 is attached to the bottom of the casing 110 of the air conditioner 100 so as to surround the side plates other than the side plate 21 provided with the opening 24 among the four side plates of the side wall 20. Further, the above-described shield plate 40 is attached to the opening of the filter 50 having a U-shape in plan view. On the other hand, a gap is provided between the filter 50 and the side wall portion 20 so that air flows.

  The filter 50 is formed by bending a strip-shaped and film-shaped fibrous body. The filter 50 surrounds the side wall portion 20 to prevent dust from entering the space surrounded by the side wall portion 20 provided with the drain drain port 113 from the opening 24.

  The upper part of the U-shape of the filter 50 in plan view is covered and closed by the upper plate 60. Like the shielding plate 40, the upper plate 60 is made of a water impermeable material. The upper plate 60 receives the water 400 when the valve body 32 and the packing 33 of the valve 30 splash the drain water, and prevents the water 400 from being scattered into the casing 110.

  Next, the operation of the drainage device 1 will be described. Here, the operation different from that of the first embodiment will be described. When the air conditioner 100 is operated, a difference in atmospheric pressure occurs inside and outside the vehicle, and as a result, the valve 30 of the drain drainage device 1 opens as shown in FIGS. 9 and 10. In this case, the air around the drain drainage device 1 passes through the filter 50 as shown by the arrow 250 in FIG. 9 and the arrows 260-263 in FIG. 10, and as shown by the arrow 251 in FIG. Is discharged to. At this time, the dust 300 contained in the air is collected by the filter 50. Therefore, it is difficult for the dust 300 to collect in the drain drainage device 1 and the drain drain port 113, and the drain water drainage path is prevented from being blocked.

  When the air pressure outside the vehicle becomes higher than the air pressure inside the vehicle during operation of the air conditioner 100, the valve 30 closes as shown in FIGS. 8 and 11. At this time, the valve body 32 and the packing 33 of the valve 30 splash the drain water. As shown by arrows 270 and 271 in FIG. 11, the shielding plate 40 receives the drain water, and the drain water is prevented from directly splashing into the casing 110. Although the drain water passes through the filter 50, its amount is small.

  As described above, the drainage device 1 according to the second embodiment includes the side plate 21 having the opening 24 formed on the side of the opening 24 of the side wall 20 and on the side opposite to the space surrounded by the side wall 20. A shield plate 40 facing the inclined wall portion 23 is provided. The shielding plate 40 is provided so as to cover the opening 24 at a position apart from the opening 24. Even when the valve body 32 and the packing 33 splash the drain water when the valve 30 closes the opening 24, the shield plate 40 receives the drain water. Therefore, in the second embodiment, the drain water is prevented from scattering into the casing 110. As a result, the drain water is prevented from leaking out into the vehicle.

  The drainage drainage device 1 includes a filter 50 provided so as to surround the side wall portion 20. The filter 50 is formed of a fibrous body and collects dust. Therefore, it is difficult for dust to enter the drain drain port 113 in the space surrounded by the side wall portion 20. As a result, it is possible to prevent the dust drain port 113 from being clogged with dust and blocking the drain water drainage path.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments. For example, in the above-described first and second embodiments, the side surface plate 21 of the side wall portion 20 is bent and the inclined wall portion 23 is formed. However, the present invention is not limited to this.

  In the present invention, the surface of the side wall portion 20 on the drain drain port 113 side has an inclined surface that inclines toward the drain drain port 113 side as it goes to the bottom of the casing 110, and the opening 24 forms the sidewall portion 20 on the inclined surface. It only needs to penetrate. For example, as shown in FIG. 12, an auxiliary plate 25 having a trapezoidal vertical cross section is provided, and the surface of the auxiliary plate 25 on the drain drain port 113 side moves toward the drain drain port 113 side as it goes to the bottom of the casing 110. You may have an inclined surface which inclines. Then, it suffices that the opening 24 penetrates the side wall 20 on this inclined surface.

  In the first and second embodiments described above, the packing 33 of the valve 30 has a plate shape and a rectangular shape. However, in the present invention, the packing 33 may be in close contact with the side wall portion 20 at the peripheral edge of the opening 24 when the valve 30 is closed. Therefore, the shape of the packing 33 is not limited to the plate shape and the rectangular shape. For example, the packing 33 may be formed in a frame shape. In this case, as shown in FIG. 13, when the valve 30 is closed, the frame of the packing 33 may be brought into close contact with the side wall portion 20 at the peripheral edge of the opening 24. Even in such a form, the opening 24 can be reliably sealed.

  In the above-described first and second embodiments, the top plate portion 10 and the side wall portion 20 form a rectangular parallelepiped bottomless box, but the present invention is not limited to this. In the present invention, when the drainage drainage device 1 is attached to the air conditioner 100, the top plate portion 10 covers the drain drainage port 113 above, the side wall portion 20 surrounds the drain drainage port 113, and the top plate portion 10 is covered. All you have to do is support. For example, the top plate portion 10 may be formed in a polygonal shape, and the top plate portion 10 and the side wall portion 20 may form a bottomless prism. Further, the top plate portion 10 and the side wall portion 20 may form a bottomless cylinder. This form also serves as a barrier against drain water and dust, and it is possible to reduce the scattering of drain water and dust into the air conditioner 100.

  In the above-described first and second embodiments, the shaft member 31 of the valve 30 is provided on the side surface plate 21. However, the present invention is not limited to this. In the present invention, the valve 30 only needs to open and close the opening 24 of the side plate 21. As shown in FIG. 14, the shaft member 31 of the valve 30 may be provided in the top plate portion 10, and the upper end of the valve body 32 may be swingably supported by the shaft member 31. In that case, when the valve body 32 shown in FIG. 14 swings toward the opening 24 side, the valve body 32 may be formed in a shape that is bent under the shaft member 31 in the direction along the inclined wall portion 23. Also in this form, the opening 24 formed in the inclined wall portion 23 of the side plate 21 can be opened and closed. As a result, it is possible to prevent backflow of drain water of the air conditioner 100 and intrusion of dust from the outside.

  In Embodiments 1 and 2 described above, the shielding plate 40 is made of a water impermeable material and does not allow water to pass therethrough. However, in the present invention, the shield plate 40 may be provided so as to cover the opening 24, and the material of the shield plate 40 is not limited to the impermeable material. For example, it may be formed of the same fibrous body as the filter 50. Even in such a form, it is possible to prevent the water droplets of the drain water from scattering.

  In Embodiments 1 and 2 above, the filter 50 is formed in a U shape in plan view, but the present invention is not limited to this. In the present invention, the filter 50 may be provided so as to surround the side wall portion 20. For example, the filter 50 may have a bottomless box shape that covers the entire rectangular parallelepiped box formed by the top plate portion 10 and the side wall portion 20.

  In the first and second embodiments described above, the air conditioner 100 to which the drainage drainage device 1 is attached is a railway vehicle, but the present invention is not limited to this. For example, the drainage drainage device 1 may be attached to an air conditioner 100 of an automobile. INDUSTRIAL APPLICABILITY The present invention can be applied to the air conditioner 100 installed in an environment where a pressure difference occurs indoors and outdoors.

1 Drain Drainage Device, 10 Top Plate, 20 Side Wall, 21 Side Plate, 22 Bend, 23 Inclined Wall, 24 Opening, 25 Auxiliary Plate, 30 Valve, 31 Shaft Member, 32 Valve Body, 33 Packing, 40 Shield plate, 50 filter, 60 upper plate, 100 air conditioner, 110 casing, 111 intake port, 112 exhaust port, 113 drain drain port, 120 blower, 130 heat exchanger, 200, 210, 220, 230, 240-242, 250, 251, 260-263, 270, 271 Arrow, 300 Dust, 400 Water

Claims (5)

A drain drainage device provided at the casing bottom in an air conditioner, which is attached so as to cover a drain drainage port for draining drain water accumulated at the casing bottom,
With the top plate part,
A side wall portion formed along the outer periphery of the top plate portion on one surface side of the top plate portion and attached to the casing bottom so as to surround the drain drainage port,
Equipped with
The side wall is
Having an opening that penetrates the side wall and drains the drain water from the casing bottom to the drain drain, and a valve that opens and closes the opening,
The valve is
A shaft member provided on the side wall portion above the opening, and an upper end swingably supported by the shaft member, and having a size that covers the opening when swinging toward the opening. A plate-shaped valve body is formed, and is formed on the side wall portion, and is inclined toward the drain drain port side from the bottom of the shaft member toward the casing bottom, and the plate-shaped valve body is disposed on the opening side. An inclined surface that receives the plate-shaped valve element when rocking and a surface that is provided on the opening side of the plate-shaped valve element, and the plate-shaped valve element is received by the inclined surface A packing closely contacting the inclined surface at the peripheral edge of the opening,
Drain drainage device. The top plate portion is provided in parallel with the casing bottom, the side wall portion is provided perpendicular to the casing bottom,
The drain drainage device according to claim 1. The top plate is formed in a polygonal shape,
When the top plate portion is formed along a polygonal side and is attached to the casing bottom, the side wall portion extends from the polygonal side of the top plate portion to the casing bottom side and the top plate. Surrounding the outer periphery of the part,
The drainage drainage device according to claim 1 or 2. Provided to the side of the opening so as to face the surface of the side wall opposite to the space surrounded by the top plate and the side wall, and cover the opening at a position distant from the opening. Further comprising a shield plate,
The drain drainage device according to any one of claims 1 to 3. Further comprising a dust collecting filter provided so as to surround the side wall portion,
The drain drainage device according to any one of claims 1 to 4.

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