JP2008099980A - Washing/drying machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize a washing/drying machine capable of preventing lint from penetrating into a circulating-air passage by accurately sensing whether a filter is installed in a normal position in a filter room or not. <P>SOLUTION: The washing/drying machine is provided with a filter sensing part 200 for sensing a state where a main filter 35 or a backup filter 82 is installed in a specified position and a microcomputer 203 for communicating an abnormality from a result sensed by the sensing part 200. The microcomputer 203 communicates the abnormality when the sensing part 200 senses that either of the main filter 35 and the backup filter 82 is not normally installed in the specified position. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a drum-type washing and drying machine that performs washing, rinsing, dehydration, and drying steps in a rotating drum that is supported in a water tank so as to be rotatable in a horizontal direction or a direction inclined from the horizontal direction.

  A drum-type washing / drying machine generally has a rotating drum that is formed in a large number of through holes and is rotated and accommodates laundry, and is generally provided with water supply, drainage, and rotation drums in the water tank. Each step of washing, rinsing, and dewatering (hereinafter referred to as “washing operation” including these three steps) is performed by controlling the rotation. Furthermore, the laundry drying process is carried out by circulating the air in the water tank through a circulation air passage provided with a dehumidifying means and a heating means by a blower fan as a blower means (for example, Patent Documents). 1 and 2).

  Here, the dehumidifying means and the heating means are an evaporator and a condenser constituting an air conditioner connected by a compressor and a refrigerant circuit as an example, and the evaporator introduces the air in the water tank to the circulation air flow path by the air blowing means. And heat exchange through the condenser sequentially to make thirsty hot air heated after dehumidification, so that it can be efficiently dried repeatedly by blowing it into the water tank and exposing it to the laundry in the rotating drum Yes.

  Foreign matter such as lint separated from the laundry in the rotating drum is mixed in the circulating air circulating through the circulating air passage in this drying process, and this clogs the evaporator and condenser, or in the bearing part of the air blowing means. Biting or depositing on each part of the air blowing means causes malfunction. For this reason, the filter which collects a foreign material is provided in the middle of the circulation ventilation path | route as disclosed by patent document 1,2. In many cases, as disclosed in Patent Document 1, this filter is provided on the upstream side of the air blowing means, the dehumidifying means, and the heating means in the circulating air introduction pipe for introducing the circulating air from the drum and the water tank. However, Patent Document 2 adopts a condensing method by injecting cooling water into the dehumidifying means so that the foreign matter can be humidified and dropped simultaneously with the dehumidification of the circulating air. The structure arrange | positioned in this order is disclosed.

In any case, the filter is provided so that it can be attached and detached because foreign matter to be collected accumulates and the passage resistance of the circulating air increases. Patent document 1 is disclosing the filter directly attached and detached from the attachment / detachment opening of the front surface of a washing-drying machine main body with the top plate which block | closes this attachment / detachment opening. Further, Patent Document 2 discloses a heating / filter unit in which a heating unit and a filter chamber are integrated with a lid opened through a loading / unloading port provided on the top surface of the washing / drying machine. A removable filter is disclosed.
JP-A-8-243292 JP 2006-187449 A

  However, in the configurations disclosed in Patent Documents 1 and 2, when the user removes the filter from the washing / drying machine and attaches the filter to the washing / drying machine again, the filter may not be properly attached to the regular position in the filter chamber. . In this case, lint may enter the circulating air blowing path from the gap between the filter and the filter chamber, which may cause malfunction of the evaporator, the condenser, and the air blowing means.

  In view of the above problems, the present invention realizes a washing and drying machine capable of accurately detecting whether or not a filter is mounted at a regular position in a filter chamber and preventing lint intrusion into a circulation air passage. With the goal.

  In order to achieve the above-mentioned object, the laundry dryer of the present invention dehumidifies and heats a water tank that rotatably holds a drum that can store laundry, and air in the water tank through a circulation path. Drying means, a filter chamber arranged in the middle of the circulation path, and circulated air that is detachably arranged in the filter chamber and enters from the circulating air inlet of the filter chamber and is discharged to the circulating air outlet. A filter device comprising a main filter disposed on the upstream side and a backup filter disposed on the downstream side of the main filter, and by controlling the water supply, drainage and rotation of the drum in the water tank, A washing and drying machine capable of performing the steps of washing, rinsing and dewatering, and capable of performing a drying step of dehumidifying and heating the air in the water tank with the drying means and releasing the air into the drum. Then, a filter detection unit that detects a mounting state of the main filter or the backup filter at a predetermined position, and a control unit that performs abnormality notification based on a detection result of the filter detection unit, the control unit, The filter detection unit confirms that at least one of the main filter and the backup filter is not normally mounted at a predetermined position until the drying process is performed after the washing dryer is turned on. If it is detected during this period, abnormality notification is performed.

  The present invention can accurately detect whether or not the filter is mounted at a proper position in the filter chamber, and can prevent foreign matter from being mixed into the circulation air passage.

  In the washing / drying machine of the present invention, the main filter and the backup filter each include a magnet, and the filter detection unit individually faces the magnet when the main filter and the backup filter are mounted at predetermined positions. Thus, a magnetic detection circuit that responds and outputs an electrical signal to the outside may be used.

  In addition, the filter detection unit includes a first magnetically responsive switch that detects the magnetic force of the magnet included in the main filter, and a second magnetic responsive switch that detects the magnetic force of the magnet included in the backup filter, The first and second magnetically responsive switches may be arranged on the same substrate.

  Further, the filter detection unit may vary the current value input to the control unit according to a filter detection result, and the control unit may vary the content of the abnormality notification depending on the input current value.

  Further, when at least one of the first and second magnetically responsive switches has not detected the filter mounting, an abnormality notification may be made at the start of the drying operation mode.

  In addition, when at least one of the first and second magnetically responsive switches does not detect the filter attachment, an abnormality notification may be made at the start of the washing-drying continuous operation mode.

  In addition, when at least one of the first and second magnetically responsive switches does not detect the filter attachment, an abnormality notification may be made when an operation mode including a drying process is reserved.

(Embodiment 1)
[1. Basic configuration of washing and drying machine)
FIG. 1 is a side view of a drum type washing and drying machine. FIG. 2 is a rear view of the drum type washing and drying machine. 1 and 2 are drawn for the sake of convenience so as to understand the internal structure.

  As shown in FIG. 1, a drum-type washing / drying machine includes a rotating drum 2 in which a large number of through holes 8 are formed and which is rotated and accommodates laundry, and is generally provided in the water tank 3. Washing, rinsing, and dewatering steps can be performed by controlling water supply, drainage, and rotation of the rotating drum 2. Furthermore, the drying process of the laundry is performed by circulating the air in the water tank 3 through the circulation air flow path 5 provided with the dehumidifying means and the heating means by the blower fan 15 which is a blower means.

  Here, the dehumidifying means and the heating means are an evaporator and a condenser constituting an air conditioner connected by a compressor and a refrigerant circuit as an example, and the evaporator introduces the air in the water tank to the circulation air flow path by the air blowing means. And heat exchange through the condenser in order to make dry hot air heated after dehumidification, repeatedly blowing it into the water tank and exposing it to the laundry in the rotating drum so that it can be dried efficiently ing. Hereinafter, the configuration will be described in more detail.

  The drum-type washing / drying machine 1 shown in FIG. 1 has a water tank 3 suspended in a washing / drying machine main body 44 by a suspension structure (not shown), and a rotating drum 2 formed into a bottomed cylindrical shape in the water tank 3. The axial center direction is disposed so as to be inclined downward from the front side toward the back side. A clothing doorway 11 leading to the opening end of the rotary drum 2 is formed on the front side of the water tank 3, and a door 9 that closes the opening provided on the upward inclined surface formed on the front side of the washing and drying machine main body 44 so as to be openable and closable. The laundry can be taken in and out of the rotary drum 2 through the clothing entrance 11. Since the door 9 is provided on the upward inclined surface, the work for putting in and out the laundry can be carried out without bending the waist, and generally the workability of the drum type washing machine for taking in and out the laundry from the sideways opening is provided. The evil has been improved.

  The rotating drum 2 is formed with a large number of through holes 8 communicating with the water tank 3 on its peripheral surface, and provided with stirring protrusions (not shown) at a plurality of positions on the inner peripheral surface. The rotating drum 2 is rotationally driven in the forward and reverse directions by a motor 7 attached to the back side of the water tank 3. Further, a water injection pipe 12 and a drain pipe 13 are connected to the water tank 3, and water is poured into and drained into the water tank 3 by control of a water injection valve and a drain valve (not shown).

  When the door 9 is opened and laundry and detergent are put into the rotating drum 2 to start the operation of the drum-type washing / drying machine 1, a predetermined amount of water is injected into the water tank 3 from the water injection pipe 12. As a result, the rotary drum 2 is rotationally driven to start the washing process. By the rotation of the rotating drum 2, the laundry accommodated in the rotating drum 2 is lifted in the rotating direction by the stirring protrusion provided on the inner peripheral wall of the rotating drum 2, and the stirring operation of dropping from the lifted appropriate height position Is repeated, so that the laundry has the effect of tapping and washing. After the required washing time, the dirty washing liquid is discharged from the drain pipe 13, and the washing liquid contained in the laundry is dehydrated by a dehydrating operation that rotates the rotating drum 2 at a high speed. Rinsing is performed by pouring water from the passage 12. Also in this rinsing step, the laundry stored in the rotary drum 2 is rinsed by repeating the stirring operation of being lifted and dropped by the stirring protrusion 4 by the rotation of the rotary drum 2.

  The drum-type washing / drying machine 1 has a function of drying laundry stored in the rotary drum 2. The air in the water tank 3 as shown in FIGS. 1 and 2 is exhausted to dehumidify and heat. The circulation air flow path 5 described above for blowing the dried air into the water tank 3 again is formed. As described above, it is general that a dehumidifying means such as an evaporator 31, a heating means such as a condenser 32, and a blower fan 15 as a blowing means are provided in the middle of the circulating air flow path 5 as shown in FIG. 1. By rotating and driving the blower fan 15, air in the circulation blower path 5 is generated and the air in the rotary drum 2 containing the laundry flows from the water tank 3 to the blower fan 15 through the through holes 8. Between the condenser 32 that is exhausted to the circulating air introduction pipe 16 and dehydrated by dehydrating the evaporator 31 located upstream of the blower fan 15 and that is heated to about 400 ° C. as described above. By heating by heat exchange, it is always dry and hot air. This dried high-temperature air is sent from the blower fan 15 to the blower duct 33 to the water tank 3 and blown into the water tank 3. The high-temperature dry air blown into the water tank 3 enters the rotary drum 2 through the through holes 8 and escapes to the water tank 3 while being exposed to laundry such as clothes, and is again introduced into the circulating air introduction pipe line 16. The drying process is carried out by repeating the circulation of the air in the circulating air flow path 5 described above.

  Further, in the drying process using the circulating air flow path 5, foreign matter such as lint generated from laundry such as clothes is circulated in the air circulated through the circulating air flow path 5, and the evaporator 31 and the condensation are circulated. It is difficult to carry out a drying process such as clogging of the vessel 32, biting into the rotating part of the blower fan 15, and accumulation on the inner surface of the blower fan 15, and frequent troublesome maintenance is required. From the middle of the circulating air flow path 5, specifically, the upstream side of the evaporator 31, the condenser 32, and the blower fan 15, and accordingly, in the middle of the circulating air introduction pipe line 16 as shown in FIGS. It is common to provide a filter chamber 36 that houses a main filter 35 that removes foreign matter in the circulating air. As a result, even if foreign matter is mixed into the air after the laundry is dried and introduced into the circulating air introduction pipe 16 side on the evaporator 31 side, it is collected by the main filter 35 when passing through the filter chamber 36. And is not mixed into the circulating air downstream. Therefore, the functions of the evaporator 31, the condenser 32, and the blower fan 15 are maintained for a long time. On the other hand, however, there is a problem in that the collected foreign matter accumulates on the main filter 35 in the filter chamber 36, and the passage resistance of the circulating air gradually increases, thereby lowering the drying function. Is provided so as to be detachable as described in Patent Documents 1 and 2 described above.

  The evaporator 31 and the condenser 32 are handled as an air conditioner 39 as shown in FIG. 1 housed in one container 38 together with a compressor 37 connected by a refrigerant circuit for circulating a refrigerant therethrough. The air inlet 41 side of the blower fan 15 is coupled to the exhaust port 41 side for exhausting air after dehumidifying and heating the introduced air of 39 with a vibration-proof structure portion between them and integrated. As a result, the compressor 37, the evaporator 31, and the condenser 32 are combined into a container body 38, and the two air conditioners 39 and the blower fan 15 are combined into a single unit suitable for mass production. Thus, each of the four devices, that is, the compressor 37, the evaporator 31, the condenser 32, and the blower fan 15 is related as an air conditioning / blower unit 81 that forms a part of the circulation blower path 5 and achieves a predetermined function.

  In the present embodiment, in order to solve the problems such as those described in Patent Documents 1 and 2 in order to provide the main filter 35, the filter device 91 represented by the main filter 35 is provided with the washing / drying machine main body 44. The filter chamber 36 is attached to and detached from the attachment / detachment opening 51 shown in FIG. 1 and FIG. In this way, the circulating air circulating through the circulation air passage 5 in the drying process is passed through the main filter 35 attached to the filter chamber 36 in the middle of the circulation air passage 5 to collect foreign matters such as lint. The main filter 35 satisfies a condition that it is easy to avoid a person or the like from being inadvertently caught and loosened by being attached and detached at the top surface 44a of the relatively tall washing and drying machine main body 44, From the attachment / detachment opening 51 opened on the top surface 44a of the washing / drying machine main body 44, it is easy to produce a forward drooping component in the attachment / detachment force due to attachment / detachment through a vertical attachment / detachment path such as that described in Patent Document 2. Compared with a thing, it can be attached and detached smoothly without difficulty in the direction along the attachment / detachment path 52 inclined forward from the lower part to the upper part where it is difficult to bend. For this purpose, it is preferable that the filter chamber 36 that follows from the attachment / detachment port 51 can be guided by the attachment / detachment path 52 that is inclined over the entire attachment / detachment stroke of the main filter 35 to a predetermined position.

  2, 3, and 5, the main filter 35 has a top plate 53 that closes the attachment / detachment port 51, and a lid 55 that pushes the top plate 53 from above against a closing spring 54. It is assumed that it has a hand-held recess 56. Thus, by attaching the main filter 35 through the attachment / detachment opening 51, the attachment / detachment opening 51 is finally closed by the top plate 53 so that the appearance is substantially flush as shown in the figure. Can be more easily caught, and can be pulled out and attached stably by placing a finger on the hand-carrying recess 56 provided on the top plate 53. In particular, since the clasp concave portion 56 is always closed by a lid 55 on which the closing spring 54 works, the clue concave portion 56 is unlikely to cause an unintentional catch of a person or the like. Further, when the main filter 35 is attached / detached, the lid 55 is pushed open by an operation of putting a finger on the hand-holding concave portion 56, so that the main filter 35 can be easily and easily attached / detached by putting a finger on it without any special work. In addition, the handhold recess 56 forms a rearward handhold edge 56a for placing a finger on the front portion of the opening. Since the clue edge 56a is located approximately in the center in the front-rear direction of the top plate 53 or slightly closer to the front, the hand edge 56a is placed on the top surface 44a of the washer / dryer main body 44 from the front side in order to hang a finger on the clue recess 56. The main filter 35 can be easily and reliably pulled out by hooking on the hand edge 56a easily and without slipping by a natural operation of extending an arm and inserting a finger into the hand holding recess 56 and bending it. In addition, the top plate 53 is sandwiched between the finger portion hooked on the handhold edge 56a and the palm portion along the outer surface of the top plate 53, the main filter 35 is stably held, and handling such as carrying after the drawing is also performed in the filter chamber 36. Can be easily and stably mounted. Further, since the rear portion of the lid 55 is hinge-connected to the rear portion of the opening of the handle recess 56 by the hinge pin 57, the handle edge 56a is opened by pushing the lid 55 when the finger is put into the handle recess 56, and is left as it is. Since the fingers can be hung, the finger-hanging operation with respect to the cue recess 56 and the cue edge 56a for attachment / detachment can be easily performed with one continuous behavior.

  More specifically, as shown in FIGS. 3 and 5, the main filter 35 supports the main filter material 79 on a main support frame 71 integrally formed or connected so as to extend downward from the top plate 53. A seal packing 73 made of silicon rubber or the like is attached to the outer periphery of the lower portion of the top plate 53 of the main support frame 71 so as to be positioned inside the circulating air discharge port 72 shown in FIG. When the seal packing 73 is mounted at a predetermined position, the seal packing 73 is pressed against the stepped portion 74 on the inner periphery of the attachment / detachment port 51 to seal the filter chamber 36, and the main filter 35 and the filter chamber 36 are sealed. An elastic engagement portion 75 as shown in FIG. 3 is provided in between, which is elastically engaged when the main filter 35 is mounted at a predetermined position. As a result, the main support frame 71 extending downward from the top plate 53 is inserted into the filter chamber 36 with the main filter material 79 only by attaching the main filter 35 to the filter chamber 36 so as to block the attachment / detachment port 51 with the top plate 53. The seal packing 73 provided on the outer periphery of the lower portion of the top plate 53 of the main support frame 71 at a predetermined mounting position is pressed against the inner peripheral step 74 inside the attachment / detachment port 51 and the elastic engagement portion 75 is elastic. The filter chamber 36 is maintained in a sealed state by the engagement, and the main filter material 79 can be correctly positioned inside the circulating air outlet 72 of the filter chamber 36. In particular, the mounting portion of the seal packing 73 of the main support frame 71 is a flange portion 71 a that faces the step portion 74 of the filter chamber 36, and the seal packing 73 extends from the mounting portion 73 a to the flange portion 71 a to the step portion 74. The seal packing 73 is firmly backed up by the flange portion 71 a of the main support frame 71 because of the relationship of having the pressure-contact seal lip 73 b, and the seal lip 73 b is placed around the entire inner periphery of the stepped portion 74 inside the attachment / detachment port 51. It can be well-familiar and surely brought into pressure contact with no air leakage. Further, since the mounting portion 73a is reinforced by the backup of the flange portion 71a, a thin one is sufficient. Here, the attachment / detachment port 51 is formed on the top surface wall 44b that forms the top surface 44a of the washing / drying machine main body 44, whereas the stepped portion 74 that seals the filter chamber 36 with the seal packing 73 is provided on the attachment / detachment port. It is formed on the inner periphery of the opening 36d of the filter chamber 36 supported by being positioned directly below.

  As shown in FIG. 3, the attachment / detachment port 51 opened to the top surface wall 44b has a dam portion 44c rising from the top surface 44a on the entire periphery, and a top plate 53 of the main filter 35 mounted inside the dam portion 44c. It is assumed that a recess 44d to be fitted is provided. As a result, the top plate 53 does not protrude from the concave portion 44d alone to the top surface 44a so that a person or the like is not caught, and even if a little water spills on the top surface 44a, the top plate 53 is dammed by the dam portion 44c. It is possible to prevent entry into the outlet 51 and prevent damage to the electrical equipment in the washing / drying machine main body 44. Further, the top plate 53 has a convex wall 53a projecting downward on the outer periphery, and the concave portion 44d is a fitting that serves as a seal to receive the convex wall 53a between the peripheral wall 44e and the upward convex portion 44f of the inner periphery. It has a structure to receive the top plate 53. Even if water enters the attachment / detachment port 51, the sealing function by the seal fitting structure with the top plate 53 in the recess 44d is provided. It is possible to prevent the inside of the attachment / detachment port 51 from extending, and further safety of the electrical equipment can be achieved. Furthermore, the top plate 53 is made slightly lower than the dam portion 44c. As a result, even when water reaches the weir portion 44c, it is possible to suppress the wetting and shifting to the top plate 53 side that has dropped due to the surface tension of the water, and this also increases the safety of the electrical equipment.

  The main support frame 71 has a bowl shape as shown in FIGS. 3 and 5 substantially along the inner surface of the filter chamber 36, and is located above the filter chamber 36 shown in FIGS. 3 and 4 below the mounting portion of the seal packing 73. A main filter material 79 corresponding to an upper half 71b for introducing circulating air from a circulating air inlet 78 provided in the half 36b and a circulating air outlet 72 provided in a lower half 36c of the filter chamber 36 is supported. And the lower half 71c. As a result, the main support frame 71 has a bowl shape and is positioned so as to be substantially along the inner surface of the filter chamber 36, and the upper half corresponding to the circulating air introduction port 78 provided in the upper half 36 b of the filter chamber 36. Circulating air is introduced into the portion 71 b and led to the lower half portion 71 c supporting the main filter material 79 inside the circulating air discharge port 72 in the lower half portion 36 c of the filter chamber 36 and circulated through the main filter material 79. The air can be smoothly discharged to the air discharge port 72 by using the full size of the filter chamber 36. In addition, as long as the main filter material 79 is not hung on the circulating air inlet 78 and is not bypassed as necessary, the main filter material 79 is not limited to the range corresponding to the circulating air outlet 72, but as shown in FIG. The area of the filter chamber 36 can be used to provide the main filter material 79 in a wide area outside 72 and to pass the circulating air toward the circulating air discharge port 72 as indicated by an arrow in the figure. As a result, clogging is less likely to occur due to an increase in the circulating air passage area of the main filter material 79.

  In this case, both the filter chamber 36 and the main filter 35 attached thereto are inclined as shown in FIG. 1, and the inner surface of the filter chamber 36 is an attachment / detachment opening formed in the top wall 44 b of the washing / drying machine main body 44. An attachment / detachment path 52 leading to 51 is formed.

  Moreover, as shown in FIGS. 3 and 5, the filter device 91 of the present embodiment works first against the circulating air that enters from the circulating air inlet 78 of the filter chamber 36 and is discharged to the circulating air outlet 72. The above-mentioned main filter 35 has a double filter structure with a backup filter 82 that operates thereafter, and the backup filter 82 is mounted before the main filter 35 and taken out later. It is provided with a relationship of being attached later and taken out earlier, and the inner side of the front wall 101b for taking out the backup filter 82 from the lower half 36c on the back side of the filter chamber 36. A cue recess 133 is provided to allow the fingers to be hung. The backup filter 82 is attached to the filter chamber 36 only by sliding it from above, and is guided to a predetermined position by the attachment / detachment path 52.

  For this purpose, a backup filter 82 having a saddle-shaped sub-support frame 101 along the inner surface of the lower half 36c of the filter chamber 36 in the backup filter 82 around the lower half 71c of the main support frame 71 in the main filter 35. The sub filter material 83 is supported outside the main filter material 79. Thus, after the backup filter 82 is attached to the lower half 36 c of the filter chamber 36, the main filter 35 is attached to the upper half 36 b of the filter chamber 36 and the inner side of the subsequent backup filter 82. Therefore, the circulating air introduced into the filter chamber 36 satisfies a double filter structure in which the main filter material 79 of the main filter 71 and the sub filter material 83 of the backup filter 82 are double-passed to the circulating air discharge port 72. be able to. As a result, the main filter material 79 and the sub filter material 83 that are thin and have low air resistance reliably collect foreign matters such as fine lint, so that the devices such as the evaporator 31, the condenser 32, and the blower fan 15 are collected. High functional maintenance performance can be obtained. Further, since most foreign matters are collected by the main filter material 79 that passes first, clogging frequently occurs on the side of the main filter material 79, and the number of clogging on the side of the sub filter material 83 is the main. Compared to the case of the filter material 79, the number is extremely small.

  Therefore, when the main filter 35 and the backup filter 82 are attached, the main filter 35 leaves the backup filter 82 in the lower half portion 36c of the filter chamber 36 and pulls it out first, and frequently clogs the backup filter 82 alone. Easy to handle and can be reattached. Further, the backup filter 82 is pulled out after the main filter 35 only when the clogging process is necessary, and after the clogging process is mounted prior to the main filter 35, the main filter 35 is mounted, and then the backup filter 82 is put into use. Can be restored. Therefore, handling is not particularly troublesome.

  Corresponding to such a double filter structure of the main filter 35 and the backup filter 82, the backup filter 82 includes a circulating air outlet of the backup filter 82 and the filter chamber 36 as shown in FIGS. A seal made of silicon rubber or the like that seals both a partition boundary portion 92 having an independent exhaust space 95 on the side of 72 and a partition boundary portion 93 having an independent exhaust space 96 between the main filter 71 and the backup filter 82. A packing 94 is provided. Thus, the circulating air introduced into the filter chamber 36 and the upper half 71b of the main support frame 71 is not bypassed, and the independent exhaust space 96 between the main filter 71 and the backup filter 82, the backup filter 82, and the filter chamber. 36, through the independent exhaust space 95 between the circulating air outlet 72 and the side of the circulating air outlet 72 as shown by arrows in FIG. Circulate.

  Here, as shown in FIG. 5, the backup filter 82 has a sub-support frame 101 having a bowl shape that fits into the lower half portion 36 c provided with the circulating air discharge port 72 of the filter chamber 36. A sub filter material 83 is supported inside the air discharge port 72. The main filter 35 has a bowl shape substantially along the inner surface of the backup filter 82 attached to the upper half 36b and the lower half 36c of the filter chamber 36, and the circulating air provided in the upper half 36b of the filter chamber 36. A backup filter that supports a main filter material 79 on the inner side of an auxiliary filter material 83 supported by an upper half 71b for introducing circulating air from an introduction port 78 and a backup filter 82 attached to the lower half 36c of the filter chamber 36. A main support frame 71 having a lower half portion 71c for discharging the circulating air in a double filter structure with 82, and satisfying the front-rear relationship acting on the exhausted circulating air and the front-rear relationship of attachment / detachment. ing.

  The seal packing 94 is attached to the outer periphery of the sub-support frame 101 as shown in FIGS. 3 and 5, and as shown in FIG. 3, between the upper half 36b and the lower half 36c of the filter chamber 36. Facing the circulating air introduction port 78 side formed on the inner surface of the main support frame 71 and the circulating air discharge port 72 side formed on the outer surface between the upper half 71b and the lower half 71c of the main support frame 71. By sandwiching the main filter 35 and the backup filter 82 at predetermined positions between the opposed portions to the step portion 103, the both step portions 102 and 103 are pressed against and sealed together. . As a result, the two partition boundary portions 92 and 93 can be sealed by one seal packing 94 by using the fitting of the main filter 35 and the backup filter 82 to the filter chamber 36. The main filter 35 is held by an elastic engagement portion 75 that elastically engages when the filter chamber 36 is mounted at a predetermined position, and is prevented from inadvertently loosening and causing air leakage. In addition, as shown in FIGS. 3 and 5, the seal packing 94 is attached to the flange portion 101a facing both the step portions 102 and 103 of the sub-support frame 101, and the attachment portion 94a to the flange portion 101a is shown in FIGS. As shown in FIG. 5, seal lips 94b and 94c extending to both the step portions 102 and 103 are pressed against the step portions. As a result, the seal packing 94 is firmly backed up to the flange portion 101a of the sub-support frame 101, and the seal lips 94b and 94c are well fitted to the entire circumference of both step portions 102 and 103, and are surely brought into pressure contact, and air leakage occurs. It can not be.

  Further, as shown in FIG. 5, the main filter 35 has an opening 121 in an open state for introducing circulating air from a circulating air introduction port 78 provided in the upper half portion 36b on the filter insertion side of the filter chamber 36. Circulating air supporting the main filter material 79 corresponding to the circulating air discharge port 72 provided in the upper half 71b on the circulating air introduction side and the lower half 36c on the back side of the filter chamber 36 as described above. A main support frame 71 having a lower half 71c on the discharge side is provided, and an upper half 71b on the circulating air introduction side of the main support frame 71 is indicated by a solid arrow 122 from the circulating air introduction port 78 through the opening 121. 6 is provided, and a negative pressure region 124 that receives suction as indicated by a broken-line arrow 123 by the flow of circulating air discharged to the circulating air discharge port 72 through the main filter material 79 is provided. As shown in the figure, through an intake port 124 a provided in the main support frame 71, an outside air introduction path 125 for introducing outside air from an outside air introduction port 125 a that has been exposed to the outside is communicated through an outside air introduction communication port 125 b that opens to the filter chamber 36. A part of the circulating air introduction area 126 having the opening 121 of the upper half 71b on the circulating air introduction side of the support frame 71 is connected to the external outlet 127 provided with the auxiliary filter 129 on the rear wall of the main support frame 71. The external exhaust path 128 communicating with the external exhaust port 128a shown in FIGS. 3 and 4 is communicated with an external exhaust communication port 128b opened in the filter chamber 36.

  The outside air introduction path 125 is normally closed with a built-in electromagnetic valve 132. However, the electromagnetic valve 132 is opened by control from the control board 67 or the like when the upper limit temperature of the circulating drum 2 or circulating air is detected. Thus, outside air is sucked into the circulating air by the negative pressure suction force generated in the negative pressure region 124 due to the flow of the circulating air, and mixed with the circulating air that circulates in the circulating air passage 5 toward the circulating air discharge port 72. Thus, the temperature of the rotary drum 2 and the circulating air can be lowered and maintained in an appropriate temperature range, and the electromagnetic valve 132 is often kept open thereafter. Further, if the amount of circulating air becomes excessive due to the introduction of this external air or the like, the pressure in the circulating air flow path 5 rises, so that the external exhaust port 127b is connected to the external through the external exhaust communication port 128b as shown by the broken line arrow 130 in FIG. It enters the exhaust path 128 and exits from the external exhaust port 128a. As shown in FIGS. 2 and 4, the outside air inlet 125a is opened directly behind to prevent foreign matter from falling, while the external exhaust port 128a is opened upward as shown in FIG. Moreover, as shown in FIG. 1, the washing and drying machine main body 44 protrudes from the back surface 44 g. As a result, the moist circulating air before dehumidification is exhausted from the external exhaust port 128a to prevent dripping of condensate water, and a small amount of dew condensation water is allowed to dry naturally.

  Here, the filter chamber 36 is formed such that a circulating air introduction port 78 is formed on the front wall of the upper half portion 36b on the attachment / detachment port 51 side, and an external exhaust communication port 128b is formed on the rear wall so as to face each other. A circulating air discharge port 72 is formed at a position on the rear wall of the lower half portion 36c that is on the side, at a position below the external exhaust communication port 128b and laterally removed. Thus, excess circulating air is introduced from the circulating air introduction port 78 in the front wall of the upper half 36b of the filter chamber 36 into the circulating air introduction area 126 of the upper half 71b of the main support frame 71, and then the filter The chamber 36 is pushed out without difficulty so as to go straight to the external communication port 128b in the rear wall of the upper half portion 36b of the chamber 36 and exhausted to the outside. The remaining circulating air with the normal air volume is smoothly discharged to the circulating air discharge port 72 on the rear wall in the lower half 36c of the filter chamber 36.

  As shown in FIG. 3, the external exhaust communication port 128b is sufficiently smaller than the circulating air discharge port 72. By adjusting the ventilation resistance between the external exhaust communication port 128b and the circulating air discharge port 72, the circulating air flow rate is reduced. Priority is given to the discharge to the circulating air discharge port 72, and the circulating air is prevented from accidentally escaping to the outside. Further, as shown in FIG. 5, the negative pressure region 124 is juxtaposed with the circulating air introduction region 126 in the upper half 71 b on the circulating air introduction side of the main support frame 71, and the backup filter of the main support frame 71. A space unrelated to 82 is used to satisfy each necessary area. Specifically, the negative pressure region 124 is partitioned by a plate-like partition 131 integrally formed in the upper half 71b on the circulating air introduction side of the main support frame 71 from the wider circulating air introduction region 126. It is formed and is connected to the circulating air introduction area 126 and communicates with the circulating air discharge side. As a result, the circulating air introduction area 126 and the negative pressure area 124 are arranged in parallel with a very simple structure, and the negative air pressure area 124 is sucked by the flow of circulating air from the circulating air introduction area 126 to the circulation air discharge port 72. Can act. In particular, as shown in FIG. 5, the outside air introduction path 125 is opened through an intake port 124 a in a peripheral wall portion facing the partition portion 131 of the negative pressure region 124. As a result, the outside air indicated by the dashed arrow 123 drawn into the negative pressure region 124 through the outside air introduction port 125a, the outside air introduction path 125, the outside air introduction communication port 125b, and the intake port 124a collides with the partition 131 and is directly below the filter. Since it faces the circulating air discharge port 72 of the chamber 36, the circulating air introduced from the circulating air introduction port 78 of the filter chamber 36 into the circulating air introduction region 126 formed by the upper half 71b of the main support frame 71 enters the lower half 71c. Therefore, the flow indicated by the solid line arrow 122 of the circulating air is not disturbed, and the flow indicated by the solid line arrow 122 of the circulating air is not disturbed. It is easy to apply a suction force to the negative pressure region 124, and the outside air sucked into the negative pressure region 124 is directed to the circulating air discharge port 72 of the filter chamber 36 as indicated by a dashed arrow 123. To satisfy the Yasu relationship.

  On the other hand, when the main filter 35, the backup filter 82, and the auxiliary filter 129 are clogged in the drying process, there is no escape route for the circulating air introduced to the main filter 35 in the past, and the pressure in the circulating air passage 5 increases. Then, it leaks into a drainage hose (not shown) connected to the aquarium 3 and is ejected to a drainage trap. The trapped water is blown off by the wind pressure, so that the function of the trap is destroyed and the smell from the sewer pipe leaks. However, the excessive amount of circulating air at the time of such clogging is the negative pressure region 124 as shown by a one-dot chain line arrow 134 in FIG. 5 contrary to the conventional flow (dashed arrow 123 in FIG. 5). Enters the outside air introduction path 125 through which the solenoid valve 132 is opened through the outside air introduction communication port 125b from the outside air introduction port 125a through the outside air introduction port 125a. So, it is possible to eliminate the naturally boost.

  Further, the negative pressure region 124 of the upper half 71b on the circulating air introduction side of the main support frame 71 is opened to the front together with the circulating air introduction region 126 having the opening 121 in the open state as shown in FIG. As shown in FIG. 4, the upper half portion 36 b on the filter attachment / detachment side of the filter chamber 36 is closed by a portion without the circulating air introduction port 78 on the front wall. As a result, both the circulating air introduction area 126 and the negative pressure area 124 in the upper half 71b of the main support frame 71 are opened to form a simple shape that functions together with the filter chamber 36, thereby facilitating molding.

[2. Configuration of Filter Detection Device 113]
As shown in FIG. 3, the main filter 35 and the backup filter 82 are provided with magnets 111 and 112, respectively. In the filter chamber 36, as shown in FIG. 4, when the main filter 35 and the backup filter 82 are mounted at predetermined positions, the filter detection device 113 is arranged at a position facing the magnets 111 and 112 individually. . Specifically, as shown in FIG. 4, when the main filter 35 and the backup filter 82 are mounted at predetermined positions (regular positions), the filter detection device 113 has a pair of faces so as to face the magnets 111 and 112, respectively. A magnetically responsive switch is built in. The filter detection device 113 responds when the magnetically responsive switch and the magnets 111 and 112 face each other, and outputs an electrical signal to the outside.

  In addition, the magnetically responsive switch of this Embodiment can be comprised with magnetic sensors, such as a Hall element and a reed switch. In the filter detection device 113, two magnetically responsive switches are housed in a single housing or mounted on the same substrate. In this way, by arranging two magnetically responsive switches in a single housing or on the same substrate, when the magnetically responsive switch is placed at a predetermined position when the washing / drying machine is assembled, it can be placed accurately and easily. Can be assembled easily.

  As a result, if both the main filter 35 and the backup filter 82 are not mounted under the control of the control board 67 provided inside the operation panel 66, the use can be prohibited.

  Since the attachment / detachment opening 51 such as the main filter 35 is located on the top surface 44a of the washing / drying machine main body 44, the operation panel 66 is not obstructed by the attachment / detachment opening 51 on the front surface of the washing / drying machine main body 44. As shown, it can be provided widely, and even if there are many operation units and display units corresponding to multiple functions, it is easy to operate and easy to see.

[2-1. Filter Detection Operation by Filter Detection Device 113]
FIG. 6 shows an internal circuit of the filter detection device 113. As shown in FIG. 6, the filter detection device 113 includes at least a filter detection unit 200 and a microcomputer 206. The filter detection unit 200 includes a first magnetically responsive switch 201, a second magnetically responsive switch 202, a resistor R1, and a resistor R2. One end of the first magnetically responsive switch 201 is connected to the nodes of the resistors R3 and R4 via the resistor R1, and the other end is grounded. One end of the second magnetically responsive switch 202 is connected to the nodes of the resistors R3 and R4 via the resistor R2, and the other end is grounded. A reference voltage Vcc (5 V in the present embodiment) is applied to one end of the resistor R3. One end of the resistor R4 is connected to the A / D input terminal 203a of the microcomputer 203. Therefore, a voltage is applied to the A / D input terminal 203a by turning on or both of the first magnetic responsive switch 201 and the second magnetic responsive switch 202.

  The first magnetically responsive switch 201 corresponds to the first magnetically responsive switch 113a in FIG. 5, and the second magnetically responsive switch 202 corresponds to the second magnetically responsive switch 113b in FIG. The resistors R1, R3, and R4 are configured with a 10 kΩ resistor, and the resistor R2 is configured with a 5.6 kΩ resistor.

  Whether or not the main filter 35 or the backup filter 82 shown in FIG. 5 is attached at the proper position depends on the on / off state of the first magnetic reaction switch 201 and the second magnetic reaction switch 202 shown in FIG. Judgment can be made. That is, when the magnet 111 shown in FIG. 5 is in a position that can be detected by the first magnetically responsive switch 113a, the first magnetically responsive switch 201 shown in FIG. 1 magnetically responsive switch 201 is turned off. Further, when the magnet 112 shown in FIG. 5 is in a position where it can be detected by the second magnetically responsive switch 113b, the second magnetically responsive switch 202 shown in FIG. 6 is turned on. 2 magnetically responsive switch 202 is turned off.

  First, when both the main filter 35 and the backup filter 82 are mounted at regular positions, both the first magnetically responsive switch 201 and the second magnetically responsive switch 202 shown in FIG. 6 are turned on. When both the first magnetic responsive switch 201 and the second magnetic responsive switch 202 are turned on, the reference voltage Vcc of 5V is divided by the parallel combined resistance of the resistors R1 and R2 and the resistor R3, and the microcomputer 203 A voltage of 1.3 V is applied to the A / D input terminal 203a.

  When the main filter 35 is not attached at the regular position and the back filter 82 is attached at the regular position, the first magnetically responsive switch 201 shown in FIG. The magnetically responsive switch 202 is turned on. When only the second magnetic responsive switch 202 is turned on, the reference voltage Vcc of 5V is divided by the resistors R2 and R3, and a voltage of 1.8V is applied to the A / D input terminal 203a of the microcomputer 203. The

  When the main filter 35 is mounted at the regular position and the backup filter 82 is not mounted at the regular position, the first magnetically responsive switch 201 shown in FIG. 6 is turned on and the second magnetically responsive switch is turned on. 202 turns off. When only the first magnetically responsive switch 201 is turned on, the reference voltage Vcc of 5V is divided by the resistors R1 and R3, and a voltage of 2.5V is applied to the A / D input terminal 203a of the microcomputer 203. The

  Further, when both the main filter 35 and the backup filter 82 are not mounted at the proper positions, both the first magnetic response switch 201 and the second magnetic response switch 202 shown in FIG. 6 are turned off. When the first magnetically responsive switch 201 and the second magnetically responsive switch 202 are turned off, a voltage of 5V is applied to the A / D input terminal 203a of the microcomputer 203.

The microcomputer 203 compares the voltage value at the A / D input terminal 203a with the threshold value, the state of the first magnetically responsive switch 201 and the second magnetically responsive switch 202, that is, the attachment of the main filter 35 and the backup filter 82. Determine the state. Specifically, the first threshold value TH1 (1.5 V in this embodiment), the second threshold value TH2 (2.1 V in this embodiment), the third threshold value TH3 (this book In the embodiment, three threshold values of 3V) are provided. The voltage Vin at the A / D input terminal of the microcomputer 203 is
Vin <TH1 (Formula 1)
When the above condition is satisfied, it is determined that both the main filter 35 and the backup filter 82 are mounted at regular positions. The voltage Vin is
TH1 ≦ Vin <TH2 (Formula 2)
When the above condition is satisfied, it is determined that only the backup filter 82 is mounted at the regular position and the main filter 35 is not mounted at the regular position. In the case of this determination result, an error message is displayed on the display unit mounted on the washing / drying machine, and control is performed so that the drying operation in the washing / drying machine is not performed. The voltage Vin is
TH2 ≦ Vin <TH3 (Formula 3)
When the above condition is satisfied, it is determined that only the main filter 35 is mounted at the regular position and the backup filter 82 is not mounted at the regular position. The voltage Vin is
TH3 ≦ Vin (Formula 4)
When the above condition is satisfied, it is determined that both the main filter 35 and the backup filter 82 are not mounted at the regular positions.

  When the microcomputer 203 determines the current filter state based on the condition shown in the above formula, it performs control according to the determination result. Specifically, when the condition shown in Formula 1 above is satisfied, the main filter 35 and the backup filter 82 are mounted at regular positions, so that normal operation control is performed on the washing / drying machine 1. In the case of the above formulas 2 to 4, since either one or both of the main filter 35 and the backup filter 82 are not mounted at the regular positions, if the drying operation is performed as it is, the circulating air flow in the washing / drying machine 1 There is a possibility that lint enters the path 5. Therefore, the microcomputer 203 performs control so as not to perform the drying operation in the washing / drying machine 1 and notifies the user of an abnormality. As an abnormality notification method, there is a method of displaying an error code or an error message on a display unit mounted on the washing / drying machine 1 or sounding a buzzer.

  Moreover, you may vary the content of abnormality alerting | reporting about each discrimination | determination result of the said Numerical formulas 2-4. That is, the error code to be displayed on the display unit in the state where only the main filter 35 is not normally attached, the state where only the backup filter 82 is not normally attached, and the state where both filters are not normally attached. By using different error messages, it is possible to clearly notify the user of the abnormal location.

  In the present embodiment, when an abnormality occurs in the filter mounting state, the operation is stopped and / or anomaly is notified when an operation course including at least a drying operation is started. For example, at the start of a drying operation course, at the start of a washing-drying operation course, or when an operation reservation including a drying operation is set, the operation is stopped and / or an abnormality is notified.

[3. Effects of the embodiment, etc.]
As described above, according to the present embodiment, the filter device 91 is placed in the normal position by arranging the magnets 111 and 112 in the filter device 91 and the filter detection device 113 that detects the magnetic force of the magnets 111 and 112. It is possible to detect whether or not it is attached to. Therefore, when the filter detection unit 200 detects that there is an abnormality in the mounting state of the filter device 91, the lint enters the circulation air flow path 5 by controlling so as not to perform the drying operation of the washing dryer 1. Can be prevented. In addition, when it is detected that there is an abnormality in the mounting state of the filter device 91, it is possible to prompt the user to attach the filter to a proper position by notifying the user of the abnormality.

  In addition, the magnet 111 is disposed on the main filter 35, the magnet 112 is disposed on the backup filter 82, and the filter detection device 113 including filter detection sensors 113a and 113b capable of detecting the magnetic force of each magnet is disposed. Thus, it can be determined whether or not either one or both of the main filter 35 and the backup filter 82 are mounted at the regular positions. As a result, when there is an abnormality in at least one of the filter mounting states, the operation of the washing / drying machine 1 is stopped, or the user is notified that there is an abnormality, and lint is mixed in the circulation air flow path 5. Can be prevented.

  Further, as shown in FIG. 6, the resistance value of the resistor R1 connected to the first magnetically responsive switch 201 is different from the resistance value of the resistor R2 connected to the second magnetically responsive switch 202. Thus, the voltage value input to the microcomputer 203 can be made different between when the main filter 35 is in an abnormal state and when the backup filter 82 is in an abnormal state. Therefore, it is possible to determine which of the main filter 35 and the backup filter 82 is attached abnormally.

  In addition, the first magnetically responsive switch 113a and the second magnetically responsive switch 113b can be installed with high accuracy by arranging them on the same substrate. Also, by arranging the two magnetically responsive switches in the same housing or on the same substrate, the two magnetic responsive switches can be installed at one time, so that the assembly can be simplified. Further, since the two filters are installed on the same substrate, the cost can be reduced.

  In addition, since the first and second magnetic responsive switches 113a and 113b, which are composed of magnets 111 and 112, and magnetic sensors, perform non-contact filter detection, the filter device 91 and It is not necessary to open a hole or the like that may cause lint to enter the filter chamber 36.

  Further, when an abnormality is detected in the filter device 91, the washing operation can be performed as usual because control is performed so that only the drying operation is not performed. Therefore, even if an abnormality occurs in the filter device 91, the washing / drying machine 1 is not disabled at all, and the usability is not significantly reduced.

  In addition, when an abnormality occurs in the filter mounting state when the washing-drying operation course is selected, the abnormality is notified to the user before the start of the washing operation, so that the usability can be improved. That is, when the washing-drying operation course is executed, in the configuration in which the operation is stopped and / or an abnormality is notified before the start of the drying operation, the user finishes the washing operation and the drying operation when the operation of the washing dryer is stopped. In spite of thinking that it is carrying out, only the washing operation is actually ended, and the user's intention does not match the actual driving operation. On the other hand, in the present embodiment, since the abnormality is notified to the user before the start of the washing operation in the washing-drying operation course, a situation in which the user's intention and the actual driving operation do not match does not occur. Therefore, the user can consider another countermeasure in advance for the laundry drying method.

  In addition, when an abnormality has occurred in the filter mounting state when setting an operation reservation including a dry operation, the abnormality is notified to the user at the time of reservation setting, so that the usability can be improved. That is, in the configuration that does not notify the abnormality at the time of driving reservation, the user actually thinks that the washing operation and the drying operation are finished at the set time, but only the washing operation is actually performed. The situation where the user's intention does not match the actual driving action occurs. On the other hand, in this Embodiment, since abnormality is alert | reported with respect to a user at the time of driving reservation including dry driving | running | working, the situation where a user's intention and actual driving operation do not match does not occur. Therefore, the user can consider another countermeasure in advance for the laundry drying method.

  That is, in the present embodiment, the filter detection unit confirms that at least one of the main filter 35 and the backup filter 82 is not normally mounted at a predetermined position after the washing / drying machine 1 is turned on. When detected before the drying process is performed, an abnormality notification is performed.

  In addition, the constant of each element shown in FIG. 6 is an example, and can be realized by other constants. In the method of changing the voltage value of the reference voltage with a resistor and detecting the voltage value to determine the mounting state of the filter as in the present embodiment, at least the first magnetically responsive switch and the second magnetically responsive switch The resistance values of the resistors R1 and R2 connected to each other may be different from each other.

  Further, the threshold values TH1, TH2, and TH3 are examples.

  Further, the filter detection configuration is not limited to a configuration using a magnet and a magnetic sensor, and a similar function can be obtained by a configuration in which detection is performed electrically and optically. However, the electrical detection configuration consumes more power than the magnetic detection configuration. In addition, in the configuration for optical detection, since an optical signal must be exchanged between the detection target and the optical sensor, the arrangement is restricted. Therefore, the configuration in which detection is performed magnetically as in the present embodiment has the least power consumption and is not greatly restricted by the arrangement of sensors and the like.

  The present invention is a technique for collecting lint such as lint mixed in circulating air with a filter in a drying process that is practically used in a circulating air blowing system for drying laundry in a drum type laundry dryer. Easy to put on and take off.

Side view of the washing and drying machine according to Embodiment 1 of the present invention. Rear view of the washing and drying machine in the first embodiment Sectional drawing which shows the relationship between the top | upper surface of the washing-dryer main body in Embodiment 1, an attachment / detachment port, a filter chamber, a main filter, and a backup filter 3 is a perspective view of the filter chamber of FIG. A perspective view showing the main filter and the backup filter separately. FIG. 3 is a circuit diagram showing a configuration of a filter detection unit in the first embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drum type washing and drying machine 35 Main filter 82 Backup filter 91 Filter 111, 112 Magnet 113 Filter detection apparatus 200 Filter detection part 201 1st magnetic response switch 202 2nd magnetic response switch 203 Microcomputer

Claims (7)

A water tank rotatably holding a drum capable of storing laundry;
Drying means for introducing air in the water tank through a circulation path to dehumidify and heat;
A filter chamber arranged in the middle of the circulation path;
A main filter disposed detachably in the filter chamber and disposed upstream of the circulating air entering from the circulating air inlet of the filter chamber and discharged to the circulating air outlet, and disposed downstream of the main filter. A backup device configured with a backup filter,
Washing, rinsing, and dewatering steps can be performed by controlling the water supply, drainage, and rotation of the drum in the water tank,
A washing and drying machine capable of performing a drying process in which air in the water tank is dehumidified and heated by the drying means and released into the drum,
A filter detection unit for detecting a mounting state of the main filter or the backup filter with respect to a predetermined position;
A controller that performs abnormality notification based on the detection result of the filter detector;
The controller is
The filter detection unit performs the drying step after the washing dryer is turned on to confirm that at least one of the main filter and the backup filter is not properly mounted at a predetermined position. A washing / drying machine that performs abnormality notification when detected in the period up to. The main filter and the backup filter each include a magnet,
The filter detection unit is configured by a magnetic detection circuit that responds individually to the magnet and outputs an electrical signal when the main filter and the backup filter are mounted at predetermined positions. The washing dryer described. The filter detector is
A first magnetically responsive switch for detecting the magnetic force of a magnet provided in the main filter;
A second magnetically responsive switch for detecting the magnetic force of the magnet provided in the backup filter,
The washing and drying machine according to claim 2, wherein the first and second magnetically responsive switches are arranged on the same substrate. The filter detection unit varies a current value input to the control unit according to a filter detection result,
The washing / drying machine according to claim 1, wherein the control unit varies the content of the abnormality notification depending on the input current value.   The washing / drying machine according to claim 3, wherein when at least one of the first and second magnetically responsive switches does not detect filter attachment, an abnormality is notified at the start of the drying operation mode.   The laundry dryer according to claim 3, wherein when at least one of the first and second magnetically responsive switches does not detect the filter attachment, an abnormality is notified at the start of the washing-drying continuous operation mode. When at least one of the first and second magnetically responsive switches does not detect filter attachment, an abnormality notification is made when an operation mode including a drying process is reserved.
The washing / drying machine according to claim 3.

Images