JP2015073778A - Drain trap device for washing machine and cover for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a trap cover for a drain trap device, capable of reducing odors flowing backward into a room through a water collection trap in which water sealing is released.SOLUTION: A drain trap device 10 includes: a water collection trap in which sealing water is collected; a first flow path 83a for allowing water in an outer tub to flow into the water collection trap; a second flow path 89 for allowing water in a waterproof pan 100 to flow into the water collection trap; and a drain port 10o for draining water flowing through the water collection trap to the outside of the device. An inflow port of the second flow path 89 is provided in the outer peripheral part of the first flow path 83a. In a drain trap cover 200 attached to the upper part of the drain trap device 10 and covering the inflow port of the second flow path 89, a communication path communicating with the outside of the drain trap cover 200 is provided on the upstream side of the inflow port of the second flow path 89. In the middle of the communication path, there is provided a backflow prevention mechanism 300 which is brought into an open state by water flowing from the waterproof pan 100.

Description

  The present invention relates to a drain trap apparatus for a washing machine suitable for use in a washing machine for washing clothes.

  As background art of this technique, there is JP 2011-78474 A (Patent Document 1). In this gazette, a drain trap body, a water trap that blocks the inflow of gas coming from a sewage flow path that is downstream of the drain trap body, a first inlet that flows waste water into the upstream side of the water trap, A drain trap apparatus for a washing machine, which is provided around or adjacent to the first inlet and has a second inlet for flowing waste water upstream of the water trap, wherein the second inlet is from above. A configuration is described in which a detachable trap cover that covers the periphery and ensures the inflow of drainage into the second inflow port is provided. In the washing and drying machine described in this publication, during the drying process, the water trap of the drain trap device is broken and air containing moisture taken from the laundry is discharged to the drain outlet.

JP 2011-78474 A

  In the drain trap apparatus of Patent Document 1, by providing a trap cover, in the state where the water in the water trap is drained and emptied (in a state where the water seal is opened), air containing moisture during the drying process And the odor from the sewage flow path is reduced from flowing back into the room where the washing and drying machine is installed through the water trap. However, a channel that connects the water trap and the room where the washing / drying machine is installed remains configured, and moisture containing air and the odor from the sewage channel flow back into the room through this channel. There was a limit to preventing it.

  An object of the present invention is to provide a drain trap device and its trap cover that can reduce the odor that flows back into the room through a water trap where the water seal is released while maintaining the function of draining the water accumulated in the waterproof pan. is there.

  In order to achieve the above object, a drain trap cover according to the present invention includes a water trap for collecting sealed water, a first channel for allowing water in an outer tub of a washing machine to flow into the water trap, and water for a waterproof pan. In the water trap, and a drain outlet for discharging water flowing through the water trap to the outside of the apparatus, and the inlet of the second channel is the first A drain trap cover that is attached to an upper portion of a drain trap device provided on an outer peripheral portion of the second flow path and covers the inlet of the second flow path; A communication path that communicates with the outside of the trap cover is provided, and a reverse flow prevention mechanism that is normally closed and opened by water flowing from the waterproof pan is provided in the middle of the communication path.

  ADVANTAGE OF THE INVENTION According to this invention, the state which maintained the function which drains the water collected on the waterproofing pan is low, and the odor which flows backward into a room through the water trap which opened the water seal can be reduced.

  Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

It is sectional drawing which shows the cross section of the washing machine (washing dryer) in the dehumidification drying driving | operation about the Example which concerns on this invention. It is sectional drawing which shows the cross section of the washing machine (washing dryer) in exhaust_gas | exhaustion drying operation about the Example which concerns on this invention. It is sectional drawing which shows the cross section of the washing machine (washing dryer) after completion | finish of drying operation about the Example which concerns on this invention. It is sectional drawing (IV-IV sectional drawing of FIG. 5) which shows the cross section of a drain trap apparatus about the Example which concerns on this invention. It is the top view (figure seen from the arrow V direction of FIG. 4) which looked at the drain trap apparatus from the top about the Example which concerns on this invention. It is the side view which looked at the drain trap apparatus from the side about the example concerning the present invention (the figure seen from the direction of arrow VI of Drawing 5). It is a top view (figure seen from the direction of arrow VII of Drawing 6) which shows the back of trap cover 200 of a drain trap device about the example concerning the present invention. It is a figure (VIII-VIII sectional view of Drawing 7) showing an operation state of a drain trap device about an example concerning the present invention, and is a figure showing a state where valve body 302 was seated on valve seat 301. It is a figure (VIII-VIII sectional view of Drawing 7) showing an operation state of a drain trap device about an example concerning the present invention, and is a figure showing a state where valve body 302 separated from valve seat 301.

  Embodiments of the present invention will be described below with reference to the drawings.

  The outline of the washing / drying machine will be described with reference to FIGS. 1 to 3. In the present specification, unless specifically required, the washing machine and the washing / drying machine are not distinguished from each other, and are simply described as a washing machine.

  The outer casing of the washing / drying machine is formed by placing an outer frame 2 formed by combining a steel plate and a resin molded product on the upper portion of the base 1. This washing / drying machine is placed in a waterproof pan 100 for a washing machine. A door 3 and a front cover 22 for taking in and out the laundry 30 are provided on the front surface of the outer frame 2, and a back cover 23 is provided on the back surface.

  An outer tub 20 is provided inside the outer frame 2. The outer tub 20 is supported by a plurality of suspensions 21 provided in the lower part. A rotating drum 29 is provided inside the outer tub 20, and the laundry 30 is put into the rotating drum 29 by opening the door 3. A fluid balancer 31 is provided on the outer periphery of the opening of the rotary drum 29 to reduce vibration due to unbalance of the laundry 30 during dehydration.

  A plurality of lifters 33 for lifting the laundry 30 are provided inside the rotary drum 29. The rotating drum 29 is directly connected to a drum driving motor 36 via a main shaft 35 connected to a rotating drum metal flange 34. A rubber packing 38 made of an elastic body is attached to the opening of the outer tub 20.

  The packing 38 serves to maintain the watertightness between the outer tub 20 and the door 3. This prevents water leakage during washing, rinsing and dehydration. The rotating drum 29 has a large number of small holes (not shown) for centrifugal dehydration and ventilation on the side wall. A drain port 37 opened in the bottom wall of the outer tub 20 is connected to the drain hose 9 via the drain valve 8.

  A drying device 6 including a dehumidifying duct 5 for drying the laundry 30 in the rotary drum 29, a fan 61 as a blowing means, and a heater 62 as a heating means is fixed to the outer frame 2 apart from the outer tub 20 (not shown). ing. The dehumidifying duct 5 and the ventilation port 32 are connected approximately horizontally by a bellows 4 having a flexible structure, and the outlet of the heater 62 and the blowing nozzle 11 are located between the uppermost surface and the center of the outer tub 20 and the outer tub 20. Are connected by a bellows 7 having a flexible structure at a position on the front side from the center in the depth direction, and absorb vibration of the outer tub 20. Temperature sensors (not shown) are provided at the drain port 37 and the intake and discharge ports of the fan 61.

  In the drum type washing and drying machine configured as described above, in the washing operation process, the laundry is put into the rotating drum 29, the water is supplied with the drain valve 8 closed, and the washing water is stored in the outer tub 20, The laundry 30 is washed by rotating the rotary drum 29. Further, in the dehydration operation process, the drain valve 8 is opened to drain the washing water in the outer tub 20, and the rotary drum 29 is rotated to perform centrifugal dehydration.

  Then, in the middle stage from the first half of the drying operation process, the rotary drum 29 is rotated with the drain valve 8 opened, and the fan 61 is operated to open the air in the outer tub 20 from the vent 32 as shown in FIG. After being sucked out and passed through the water-cooled dehumidifying duct 5 and water-cooled and dehumidified, the heated air is heated by the heater 62 to generate the circulating air 12 that is blown from the blowing nozzle 11 toward the laundry 30 in the rotary drum 29.

  The dehumidification of the circulating air 12 that has taken moisture from the laundry 30 in the rotary drum 29 is performed by opening the cooling water valve (not shown) and flowing out from the cooling water supply pipe 51 to the wall surface in the water-cooled dehumidifying duct 5. 52 is caused to flow down and contact with the circulating air 12. The cooling water 52 that has flowed to the wall surface in the water-cooled dehumidifying duct 5 passes through the drain port 37 and is discharged by the drain hose 9.

  In the latter half of the drying operation process, the heater 62 is turned off and the cooling water 52 is stopped as shown in FIG. The external air 16 sucked from the gap at the bottom of the base 1 by opening the intake valve 13 is heated while receiving the exhaust heat of the outer tub 20, the motor 36, and the fan 61 while flowing through the side surface of the outer tub 20, and is dried. The air is sucked into the fan 61 together with the high-temperature housing internal air 15 accumulated in the space between the upper surface of the outer tub 20 and the outer frame 2 until the middle stage.

  The sucked interior air 14 is blown onto the laundry 30 to take moisture from the laundry 30, gets wet, passes through the drainage hose 9 from the drainage port 37, and breaks the water seal that can be used as the water trap of the drainage trap device 10. Are discharged to the drain 40 and flow down to the sewer channel. In the case of a general drain trap apparatus, the height of the water seal is about 50 to 80 mm, so that the pressure on the drain hose 9 side is required to be about 1000 Pa or more to break the water seal.

  Moreover, in order to suppress the odor which flows in so that it may flow backward from the drain port 40, it is necessary to ensure high pressure (pressure more than predetermined) even after breaking the water seal, and during exhaust type drying by the drain hose, The fan 61 is controlled so as to maintain a high pressure.

  A drain trap device 10 to which the drain hose 9 is connected is attached to a waterproof pan 100 for a washing machine. The drain trap apparatus 10 has a general drain trap apparatus structure. In the drain trap device, drainage from the drainage hose 9 flows and water flowing through the waterproof pan 100 for the washing machine also flows. Details will be described later.

  After the drying operation, as shown in FIG. 3, the cooling water 52 is flowed by reducing the rotational speed of the fan 61 to a pressure level that does not break the water seal while keeping the pressure on the drain hose 9 side higher than the pressure on the drain port 40 side. Then, water is stored in the water trap of the drain trap apparatus 10 to recover the water seal, and the drying operation process is completed.

  In this way, after the drying operation is completed, the water trap is provided while suppressing the odor from the drain port 40 by supplying water to the drain trap device 10 via the drain hose while maintaining the pressure on the drain hose 9 side above a predetermined value. Ten water seals can be restored.

  The water sealing recovery of the drain trap device may be performed at the end of the drying operation or after the drying operation is finished as long as the pressure on the drain hose 9 side is kept high.

  In the dehumidification drying shown in FIG. 1, the exhaust hose 9 is not exhausted, but in the exhaust drying operation shown in FIG. However, in the exhaust drying operation that is operated while sucking the external air 16, the hot and humid exhaust that has taken away the moisture of the laundry 30 is passed through the drain hose 9 and the drain trap device 10 to the sewage flow path. The power consumption can be reduced without deteriorating the power consumption. Furthermore, since the water sealing of the drain trap device 10 is recovered while maintaining the internal pressure on the drain hose 9 side at the end of the drying operation, the odor from the drain port 40 does not leak into the room and deteriorate the environment.

  The drying operation process includes various operations in which the exhaust drying operation is continued from the beginning to the end, water-cooled dehumidification is performed to shift to the exhaust drying operation from the middle, or the exhaust drying operation is performed to shift to the water cooling dehumidification from the middle.

  Next, the drain trap apparatus will be described with reference to FIGS. 4 to 8B.

  As shown in FIG. 4, the drain trap apparatus 10 for a washing machine includes a drain trap body 80, a sealing tub 81 placed in the drain trap body 80, a sealing cylinder 82 placed in the sealing tub 81, and a sealing cylinder 82. It has an inflow cylinder 83 placed in it.

  The water trap for storing the sealing water is constituted by a sealing water tank 81, a sealing cylinder 82 and an inflow cylinder 83, and the sealing water is stored as shown in FIGS. Odor coming back from the sewage flow path is blocked by the sealed water collected in the water trap. Thereby, it is suppressed that an odor flows in into a room.

  The drain trap body 80 has a drain port 40 on the outlet side. In this embodiment, the drain port 40 is provided so as to open to the bottom surface of the drain trap. The drain port 40 is connected so as to communicate with the sewage flow path, and the waste water of the washing machine flows into the drain trap device 10 and flows down from the drain port 40 to the sewage flow path.

  The water seal 81 has a bottomed cylindrical shape, and the water seal 81 is supported by the drain trap body 80 while being lifted from the bottom of the drain trap body 80. The inflow cylinder 83 has a support leg 85 at the lower end. The support leg 85 supports the inflow cylinder 83 in a state where it is lifted from the bottom of the sealing water tank 81 so that the drainage flows from the inflow cylinder 83 to the sealing water tank 81. ing.

  The upper frame ring 86 is fitted into the upper opening of the drain trap body 80. The drain trap body 80 attached to the bottom of the washing machine waterproof pan 100 is fastened to the washing machine waterproof pan 100 by the upper frame ring 86.

  The fixing screw ring 87 is screwed to a screw formed on the inner periphery of the upper frame ring 86 to fix the water sealing cylinder 82. An L-shaped connecting joint pipe 88 is connected to the upper side of the inflow cylinder 83, and the lower end (downstream end), which is the outlet side of the drainage hose 9, is detachably attached to the upper end side (upstream end side) of the connecting joint pipe 88. Connected to. The waste water from the washing machine flows through the drain hose 9, the connecting joint pipe 88, and the inflow cylinder 83 and flows into the drain trap device. The water that flows out to the bottom of the waterproof pan 100 for the washing machine flows into the drain trap device from an inlet 89 provided on the outer peripheral side of the inflow cylinder 83 and communicating with the sealed cylinder 82. When the drainage hose 9 is not connected to the connection joint pipe 87, the water discharged from the drainage hose 9 flows in the waterproof pan 100 for the washing machine and communicates with the sealing cylinder 82 provided on the outer peripheral side of the inflow cylinder 83. To the inlet 89.

  The inlet (flow path) 83a in the inflow cylinder 83 is defined as a first inlet (first flow path). An inflow port (flow channel) 89 provided on the outer peripheral side of the inflow cylinder 83 and communicating with the sealed water cylinder 82 is defined as a second inflow port (second flow channel). The first flow path 83a is provided in the vertical direction in the central portion of the drain trap device 10 or the drain trap body 80, and communicates with the outer tub 20 of the washing machine to drain the water in the outer tub 20. Become. The second flow path 89 is formed on the outer periphery of the first flow path 83a and serves as a drainage path for draining water from the waterproof pan 100. The second inflow port 89 is provided with an eye plate 89a to prevent the waste thread from flowing in. The eye plate 89a is formed integrally with the fixed screw ring 87, but may be formed separately.

  The first inlet 83a and the second inlet 89 are arranged concentrically, and the second inlet 89 exists in a circular shape (annular shape) around the first inlet 83a. The eye plate 89a provided at the second inlet 89 has a circular inner and outer periphery. The first inflow port 83a and the second inflow port 89 may be arranged adjacent to each other without being concentrically arranged.

  Since the first inflow port 83a and the second inflow port 89 are on the upstream side of the water trap, the water flowing into the drain trap device 10 from the first inflow port 83a and the second inflow port 89 is stored in the water trap. It flows out from the drain port 10o of the drain trap device 10 via.

  In the exhaust drying operation of the washer / dryer, the exhaust from the drainage hose 9 is vigorously blown from the first inflow port 83a to the water accumulated in the water trap, and the water seal described above is broken (the water seal is released). ). At this time, most of the water is discharged from the drain port 10o, but a part of the water bounces back in the second inflow port 89 with the momentum of exhaust and blows out into the room. However, as shown in FIGS. 1 to 4, by providing the trap cover 200 so as to cover the second inflow port 89 from above, the splashing water is received by the trap cover 200, and the blowout to the indoor side is not performed. It can be suppressed.

  Further, noise generated when the water seal is broken and noise of the exhaust flow flowing through the drain trap device are also suppressed by the trap cover 200, so that the noise can be reduced.

  In addition to this, a part of the exhaust gas flows backward through the second inlet 89 during the exhaust drying operation, but the trap cover 200 can prevent or suppress the inflow into the room. Thereby, it is possible to prevent or suppress high-humidity air (exhaust gas) from flowing into the room.

  In this embodiment, the lower end (downstream end) of the inflow cylinder 83 is increased in diameter toward the lower end to form a bell mouth shape. The diameter of the lowermost end is substantially the same as the outer diameter of the sealing cylinder 82, and the step area of the flow path formed between the lower end of the inflow cylinder 83 and the lower end of the sealing cylinder 82 is reduced so that the odor is reduced. It is difficult to flow backward to the second inlet 89 side.

  In addition, since the trap cover 200 is provided with an inlet (opening) 10i (see FIG. 6) to the second inlet 89 at the peripheral portion and a drainage path is secured, the drainage of the second inlet 89 is provided. Function is maintained without loss.

  Next, the trap cover 200 will be described in more detail with reference to FIGS. 5 to 8B.

  The trap cover 200 is made of a synthetic resin. It is desirable to make the flexible synthetic resin because it is easy to bend when the trap cover 200 is attached and detached.

  The trap cover 200 has a disc-shaped cover portion 201 that covers the second inlet 89 from above, and a support leg that ensures the inflow of drainage by separating the cover 201 upward from the upper surface of the second inlet 89. Part 202. The outer diameter of the cover part 201 is larger than the outer diameter of the circular eye plate 89a. The outer diameter of the cover part 201 may be the same as the outer diameter of the eye plate 89a.

  On the outer periphery of the cover portion 201 of the trap cover 200, a flange portion 209 for mounting the trap cover 200 on the drain trap apparatus 10 is formed. By providing a sealing member (not shown) between the lower surface of the flange 209 and the upper surface of the drain trap device 10, water sealing performance is improved. Alternatively, when the trap cover 200 is placed on the drain trap apparatus 10 by insert-molding a weight of a metal ring (not shown) or the like into the collar portion 209 to increase the weight of the trap cover 200. The adhesion between the trap cover 200 and the drain trap apparatus 10 may be improved. Or you may combine the trap cover 200 which insert-molded metal rings etc. in the collar part 209, and the sealing member pinched between the lower surface of the collar part 209, and the upper surface of the drain trap apparatus 10. FIG.

  The eye plate 89 a of the second inlet 89 is covered with the cover portion 201 of the trap cover 200 from above. For this reason, (1) rebound water, (2) noise of exhaust flow, and (3) backflow of exhaust generated at the second inlet 89 during the exhaust drying operation are suppressed by the cover unit 201. Further, the cover leg 201 is held by the support leg 202 so as to be separated from the upper surface of the eye plate 89a. For this reason, the inlet (opening) 10i into which drainage flows into the peripheral part of the cover part 201 is ensured, and the function of the second inlet 89 is maintained without being lost.

  The plurality of support legs 202 have an arc shape that hangs down on the back side of the cover unit 201. As shown in FIG. 7, the plurality of support legs 202 having the arc shape are arranged concentrically with the center of the cover 201 and at intervals. The plurality of support legs 202 are in a triple arrangement of an outer peripheral portion, an inner peripheral portion, and an intermediate portion.

  By providing the plurality of support legs 202, the cover 201 is not easily crushed even when pressed from above, and the second inlet 89 is not easily blocked.

  The trap cover 200 is formed so that the outer periphery of the inflow cylinder 83 fits in the center of the cover portion 201 and protrudes into the insertion opening 203 from the opening edge portion of the insertion opening 203. And a plurality of lips 205 divided in the direction. Since the lip 205 is divided into a plurality of portions in the circumferential direction by the notches 204, the lip 205 can be easily bent in the axial direction of the inflow cylinder 83 when the inflow cylinder 83 is inserted. Further, the lip 205 is thinner than the other parts. For this reason, the lip 205 has sufficient flexibility.

  The trap cover 200 is attached by inserting the insertion opening 203 into the distal end side of the connection joint pipe 88 and moving it to the inflow cylinder 83. At this time, since the lip 205 is bent and the fitting movement is performed smoothly, the attaching operation is easy.

  Furthermore, the trap cover 200 has a recess 207 that falls downward from the base of the lip 205 over the insertion opening 203. In addition, the trap cover 200 has a downward slope from the outer periphery of the cover portion 201 to the base of the lip 205. Since it has such a configuration, the water that has flowed down to the upper surface of the cover portion 201 flows toward the center, collects in the recess 207, and flows down from the notch 204 to the eye plate 89a. When the insertion opening 203 is fitted to the outer periphery of the inflow cylinder 83, the lip 205 is bent so as to bend and the notch 204 is expanded, so that the water collected in the recess 207 easily flows out and residual water is hardly generated.

  Further, the cover portion 201 is provided with a projection storage portion 208 in which the turning protrusion is accommodated in a portion facing the upward turning protrusion (not shown) provided on the eye plate 89a. By providing the projection housing portion 208, the trap cover 200 does not come into contact with an upward turning projection (not shown) and is not lifted, so that the trap cover 200 is attached in a stable state.

  Further, the trap cover 200 may be provided with a detachable slit extending over the inner and outer periphery of the cover portion 201. Then, the attachment / detachment slit may be opened to the extent that the outer diameter of the inflow cylinder 83 enters, and the trap cover 200 may be fitted into the inflow cylinder 83 from this opening. Accordingly, the trap cover 200 can be easily attached and detached.

  In this embodiment, there is provided a check valve mechanism 300 that prevents or suppresses odor that flows back into the room via the water trap and the second flow path 89 when the water seal is released. The backflow prevention mechanism (check valve mechanism) 300 will be described with reference to FIGS. 4 to 8B.

  The backflow prevention mechanism 300 is provided on the drain trap cover 200. Specifically, the check valve mechanism 300 is provided between the second inflow port 89 and the inflow port (opening) 10i provided in the peripheral portion of the cover portion 201, and the water reservoir in which the water seal is released. The odor that flows backward from the trap to the second flow path 89 is blocked by the backflow prevention mechanism 300 to effectively prevent or suppress the inflow into the room.

  For example, in the exhaust drying operation performed in the latter half of the drying operation process described above, the odor backflow can be prevented or suppressed by controlling the fan 61 so as to increase the exhaust pressure. At the end of the drying operation process, water is supplied to the water trap to recover the water seal, so that the back flow of odor can be prevented. However, if the washing machine is stopped due to a power failure or the like while the water seal is released during the exhaust drying operation or the like, the water trap of the water trap remains released and the odor may flow backward. Although the odor can be suppressed by providing the drain trap cover 200 of Patent Document 1, it is desired to further enhance the effect of suppressing the odor backflow.

  Hereinafter, the backflow prevention mechanism 300 will be described in detail.

  The backflow prevention mechanism 300 includes a valve body (floating body) 302 composed of a ball (sphere), an annular valve seat (partition) 301 on which the valve body 302 is seated, and a valve body housing in which the valve body 302 is housed. A chamber (valve configuration chamber) 303, an inlet (opening) 10i provided at the peripheral edge of the cover 201, and an upstream side of the valve seat 301 and a downstream side of the inlet 10i in the direction of drainage. And the valve front chamber 304. That is, in the present embodiment, a communication path that communicates with the outside of the drain trap cover 200 via the valve body storage chamber 303 and the valve portion front chamber 304 is configured on the upstream side of the inflow port of the second flow path 89. In the middle of this communication path, a backflow prevention mechanism 300 that is normally closed and opened by water flowing from the waterproof pan 100 is provided.

  The valve body 302 is made of a hollow resin, is lighter than water of the same volume, and is configured to float on water. As long as it can float on water and can realize a drainage function and an odor blocking function, it may be solid, and the material is not limited to resin.

  The valve seat 301 has an annular shape (circular shape) so that there is no gap between the valve body 301 and the spherical valve body 302. A part of the valve seat 301 in the circumferential direction is configured by a thin plate-like portion 301a being circularly curved (see FIG. 7). The plate-like portion 301a has a predetermined width in the vertical direction (height direction), and constitutes a partition that partitions the valve body accommodation chamber 303 and the valve portion front chamber 304 in the horizontal direction. That is, the side wall of the valve portion front chamber 304 is configured. Further, the other part of the valve seat 301 in the circumferential direction is configured by a circular arc-shaped notch 302b provided horizontally (see FIG. 7). The flat plate portion in which the notch portion 302b is formed constitutes a partition wall that partitions the valve body storage chamber 303 and the valve portion front chamber 304 in the vertical direction (height direction). In other words, the plate-like portion 301a and the flat plate portion on which the notch portion 302b is formed constitute a partition portion that partitions the valve body storage chamber 303 and the valve portion front chamber 304, and the valve seat is provided in the partition portion. Is formed with an opening edge. The plate-like portion 301a and the notch portion 302b are formed by resin molding.

  The valve body storage chamber 303 is formed at a height that allows a gap between the uppermost portion of the valve body 302 and the ceiling of the valve body storage chamber 303 in a state where the valve body 302 is seated on the valve seat 301. This height is set to a height that restricts the flying height of the valve body 302 so that the lower part of the valve body 302 floating in water is located below the height position of the valve seat 301. If a mechanism for limiting the horizontal movement of the valve body 302 is provided so that the floating valve body 302 can be seated again on the valve seat 301, it is necessary to limit the height of the ceiling portion of the valve body storage chamber 303. Disappear.

  The inflow port 10i communicates with the valve front chamber 304, and communicates the valve front chamber 304 with the outside of the drain trap device 10. Thereby, the inflow port 10i introduces the water in the waterproof pan 100 into the valve front chamber 304.

  An opening 305 is formed in the outer peripheral portion of the plate-shaped portion 301a to allow the valve body storage chamber 303 and the second inflow port 89 to communicate with each other.

  In this embodiment, two valve mechanisms including a valve body 302 and a valve seat 302 are provided in the valve body storage chamber 303. The number of valve mechanisms is not limited to two, and may be one or three or more depending on the drainage capacity of each valve portion.

  The backflow prevention mechanism 300 protrudes higher than the height of the cover part 201. The backflow prevention mechanism 300 is provided in a part of the circumferential direction of the drain trap cover 200, and the other part is made lower than the height of the part of the backflow prevention mechanism 300. Within the range of the lowered portion, the upstream end of the connection joint pipe 88 is configured to be rotatable in the circumferential direction. Thereby, even if the backflow prevention mechanism 300 is provided, the height dimension of the apparatus including the connection joint pipe 88 can be kept low.

  Next, the operation of the backflow prevention mechanism 300 will be described with reference to FIGS. 8A and 8B.

  In a state where water does not accumulate in the waterproof pan 100, the valve body 302 is seated on the valve seat 301 as shown in FIG. 8A. In this state, even if the water trap of the water trap is broken, even if the odor 306 can reach the valve body storage chamber 303, the valve mechanism constituted by the valve body 302 and the valve seat 301 can bring the odor 306 to the indoor side. Blocked outflow.

  On the other hand, when water accumulates in the waterproof pan 100, the water 307 flowing into the valve front chamber 304 from the inlet 10i pushes up the valve body 302 as shown in FIG. 8B, and the valve body 302 separates from the valve seat 301. To sit away. When the valve body 302 is separated from the valve seat 301, a gap through which water flows is created between the valve body 302 and the valve seat 301, and water flows into the valve body housing chamber 303 through this gap. The water 308 flowing into the valve body storage chamber 303 flows to the second inlet 89 through the opening 305 (see FIG. 7), and is discharged from the outlet 10o via the water trap.

  In the state where the water seal of the water trap is broken, the foam contained in the washing water may flow backward from the second inflow port to the valve body storage chamber 303, but is configured by the valve body 302 and the valve seat 301. The valve mechanism can prevent outflow to the indoor side.

  The drain trap apparatus 10 in the present embodiment is not limited to a dryer or a washing dryer that performs an exhaust drying operation, and may be used in a washing machine that performs a washing operation and a dehydrating operation but does not perform a drying operation. The bounce water generated at the second inlet 89 can be prevented, and even when the washing machine is not used for a long period of time, even if the water trap of the water trap is broken, the odor is prevented from flowing into the room. It can be prevented or suppressed.

  In addition, this invention is not limited to each above-mentioned Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations. In addition, it is possible to add, delete, and replace other configurations for a part of the configuration of the embodiment.

  DESCRIPTION OF SYMBOLS 10 ... Drain trap apparatus, 80 ... Drain trap main body, 81 ... Sealed water tank 81, 82 ... Sealed cylinder 82, 83 ... Inflow cylinder, 10o ... Drain port, 85 ... Support leg, 86 ... Upper frame ring, 100 ... Washing machine Waterproof pan, 87 ... Fixed screw ring 87, 88 ... Connection joint pipe, 9 ... Drain hose, 89 ... Second inlet (second flow path), 83a ... First inlet (first flow path) ), 89a ... Eye plate, 200 ... Trap cover, 10i ... Inlet (opening), 201 ... Cover part, 202 ... Supporting leg part, 203 ... Insertion opening 203, 204 ... Notch, 205 ... Lip 205, 207 ... Recess, 208: Protrusion storage portion, 300 ... Backflow prevention mechanism (check valve mechanism), 302 ... Valve body, 301 ... Valve seat, 303 ... Valve body storage chamber (valve portion constituting chamber), 304 ... Valve portion front chamber, 301a ... Plate-shaped part, 302b ... Arc-shaped notch part, 30 ... opening.

Claims (5)

A basin trap for storing sealed water, a first channel for allowing water in an outer tub of the washing machine to flow into the basin trap, a second channel for allowing water from a waterproof pan to flow into the basin trap, and the basin A drain outlet for discharging water flowing through the trap to the outside of the apparatus, and an inlet of the second flow path is provided at an upper portion of the drain trap apparatus provided on an outer peripheral portion of the first flow path. In the drain trap cover attached and covering the inlet of the second flow path,
A communication path communicating with the outside of the drain trap cover is provided on the upstream side of the inlet of the second flow path, and is normally closed in the middle of the communication path by water flowing from the waterproof pan. A drain trap cover provided with a backflow prevention mechanism that is in an open state. The drain trap cover according to claim 1,
The backflow prevention mechanism includes a partition portion provided with an opening and a floating body that opens and closes the opening by being displaced vertically on the upper surface side of the opening, and an inner side partitioned by the partition portion is the second flow Communicating with the inflow port of the road, the outside partitioned by the partitioning part communicates with the waterproof pan, and the floating body closes the opening by its own weight and opens the opening by rising by rising the water level. Drain trap cover characterized by that. In the drain trap cover according to claim 1 or 2,
A drainage trap having a flange for mounting on the upper surface of the drainage trap device, and a seal member interposed between the upper surface of the drainage trap device and the lower surface of the flange cover. In the drain trap cover according to claim 1 or 2,
A drain trap cover characterized by comprising a weight member. A water trap for storing sealed water, a first flow path for allowing water in an outer tub of a washing machine to flow into the water trap, and water in a waterproof pan provided on an outer periphery of the first flow path. Drainage provided with a second flow path for flowing into the water, a drain outlet for discharging water flowing through the water trap to the outside of the apparatus, and a drain trap cover covering the inlet of the second flow path In the trap device,
A communication path communicating with the outside of the drain trap cover is provided on the upstream side of the inlet of the second flow path, and is normally closed in the middle of the communication path by water flowing from the waterproof pan. A drainage trap device provided with a backflow prevention mechanism that is in an open state.

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