JP2008220505A - Drum type washing/drying machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drum type washing/drying machine capable of enhancing the water saving effect and reducing the time for drying laundry. <P>SOLUTION: A rotary drum 104 is rotatably disposed inside a water tub 103. The axis L of the rotary drum 104 is inclined relative to a horizontal plane in such a way that the rear part is lower than the front part. Washing water inside the rotary drum 104 is released by a circulation pump 110 into the rotary drum 104. The rotary drum 104 has a peripheral wall 152 with a plurality of small apertures 109 and a rear end wall 153 continued to the rear end of the peripheral wall 152. The density of the small apertures 109 in the peripheral wall 152 in the vicinity of the rear end wall 153 is larger than the density of the small apertures 109 in the area of the peripheral wall 152 other than the vicinity of the rear end wall 153. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a drum type washing and drying machine.

  Conventional drum-type washing / drying machines are disclosed in Japanese Patent Application Laid-Open No. 2004-105250. As shown in FIG. 8, the drum type washing and drying machine includes an outer box 801, a water tank 803 disposed in the outer box 801, and a rotating drum 804 rotatably disposed in the water tank 803. ing.

  A plurality of small holes 809 penetrating the peripheral wall are provided in substantially the entire peripheral wall of the rotating drum 804. The small holes 809 are used for circulating washing water between the space between the water tank 803 and the rotating drum 804 and the space inside the rotating drum 804.

  In addition, 820 of FIG. 8 is a baffle.

  The drum type laundry dryer having the above-described configuration picks up and lifts the laundry with the baffle 820, drops the lifted laundry into the wash water, and wash the laundry. For this reason, in order to wash the laundry, washing water must be stored in the rotating drum 804.

  On the other hand, since a plurality of small holes 809 are provided over substantially the entire peripheral wall of the rotating drum 804, the washing water in the rotating drum 804 can easily flow out of the rotating drum 804.

  Therefore, in order to store the wash water in the rotary drum 804, the wash water must also be stored between the rotary drum 804 and the water tank 803 (the hatched portion in FIG. 8).

  As a result, there is a problem that the amount of washing water supplied to the water tank 803 must be increased, and the water-saving effect cannot be increased.

  In addition, when the laundry is dehydrated, the rotating drum 804 is rotated. However, if the rotating speed of the rotating drum 804 is increased, the laundry bites into the small hole 809 by centrifugal force and sticks to the peripheral wall of the rotating drum 804. .

  Therefore, the rotational speed of the rotating drum 804 cannot be increased, and the laundry cannot be sufficiently dehydrated.

As a result, there is a problem that even if the laundry is dried after the dehydration, the drying time of the laundry becomes long.
JP 2004-105250 A

  Therefore, an object of the present invention is to provide a drum type laundry dryer that can increase the water-saving effect and can shorten the drying time of the laundry.

In order to solve the above problems, the drum-type washing and drying machine of the present invention is
An outer box having an outer box opening for taking in and out the laundry at the front;
A water tank disposed in the outer box and having a water tank opening facing the outer box opening;
A rotating drum that is rotatably arranged in the water tank and whose central axis is inclined with respect to a horizontal plane so that the rear part is lower than the front part,
A driving device for rotationally driving the rotating drum;
A circulation device for supplying washing water in the water tank into the rotating drum;
A dehydrating system for drying the laundry in the rotating drum by dehumidifying and heating the air sucked from the rotating drum and blowing the dehumidified and heated air into the rotating drum;
The rotating drum is
A peripheral wall provided with a plurality of first through holes;
A rear end wall connected to the rear end of the peripheral wall,
The density of the first through holes in the peripheral wall other than the vicinity of the rear end wall is smaller than the density of the first through holes in the peripheral wall in the vicinity of the rear end wall.

  According to the drum type washing and drying machine having the above configuration, when washing water is accumulated in the rotary drum, the rear end of the rotary drum is compared with the density of the first through holes in the peripheral wall in the vicinity of the rear end wall of the rotary drum. Since the density of the first through holes in the peripheral wall other than the vicinity of the wall is small, the outflow of the washing water from the rotary drum to the outside of the rotary drum is small in the peripheral wall other than the vicinity of the rear end wall of the rotary drum. That is, it is difficult for the washing water in the rotating drum to flow out between the water tank and the rotating drum.

  Therefore, the washing water can be stored in the rotating drum without storing a large amount of the washing water between the rotating drum and the water tank.

  Therefore, it is possible to obtain a high water-saving effect by reducing the amount of washing water between the rotating drum and the water tank.

  In addition, the washing water in the rotating drum comes out of the rotating drum from the first through hole and comes into the water tank, and the washing water in the water tank is supplied into the rotating drum by a circulation device. Can do.

  Therefore, it is possible to prevent the level of the washing water in the rotating drum from dropping and to sufficiently wash the laundry in the rotating drum.

  In addition, when the laundry in the rotating drum is dehydrated, the density of the first through holes in the peripheral wall near the rear end wall of the rotating drum is higher than that of the rotating drum even if the rotating speed of the rotating drum is increased. Since the density of the first through holes in the peripheral wall other than the vicinity of the end wall is small, the laundry is difficult to stick to the peripheral wall other than the vicinity of the rear end wall of the rotating drum.

  Accordingly, the rotational speed of the rotating drum can be increased to improve the degree of dehydration of the laundry, and as a result, the drying time of the laundry can be shortened.

  Moreover, since the power consumption can be reduced by the amount that the drying time of the laundry can be shortened, an energy saving effect can be obtained.

  Moreover, since it is difficult for the laundry to stick to the peripheral wall other than the vicinity of the rear end wall of the rotating drum, it is possible to reduce the burden on the control for preventing and releasing the sticking of the laundry.

  The drying system dehumidifies and heats the air sucked from the rotating drum, and blows the dehumidified and heated air (hereinafter referred to as “high temperature and low humidity air”) into the rotating drum. Dry the laundry in the rotating drum. Thus, when the laundry is dried, the rotating drum is inclined with respect to the horizontal plane so that the rear part is lower than the front part, so that most of the laundry is the rear end wall of the rotating drum. It is gathered in the vicinity. And since the density of the first through holes in the peripheral wall other than the vicinity of the rear end wall of the rotating drum is smaller than the density of the first through holes in the peripheral wall near the rear end wall of the rotating drum, the laundry reaches the laundry. The high temperature and low humidity air that goes out of the rotating drum from the first through hole in the peripheral wall other than the vicinity of the rear end wall of the rotating drum is reduced. That is, the so-called shortcut of the high temperature and low humidity air can be prevented.

  Therefore, the high-temperature and low-humidity air can be efficiently applied to the laundry, so that the laundry drying time can be further reduced.

  Moreover, since the power consumption can be further reduced by the amount that the laundry drying time can be further reduced, the energy saving effect can be further enhanced.

In the drum-type washing and drying machine of one embodiment,
The first through hole is provided only in the peripheral wall in the vicinity of the rear end wall.

  According to the drum type washing and drying machine of the above embodiment, since the first through hole is provided only in the peripheral wall near the rear end wall of the rotary drum, the effect of reducing the sticking of the laundry to the peripheral wall of the rotary drum is enhanced. And the manufacturing cost of the rotating drum can be reduced.

In the drum-type washing and drying machine of one embodiment,
The driving device is attached to the rear of the water tank,
The rotating drum gradually increases in diameter from the front end of the peripheral wall toward the rear end of the peripheral wall.

  According to the drum type laundry dryer of the above embodiment, when the laundry is put into the rotating drum, the diameter of the rotating drum gradually increases from the front end of the peripheral wall toward the rear end of the peripheral wall. Are more likely to gather near the rear end wall of the rotating drum.

  Therefore, since the centrifugal force load generated when the rotating drum rotates is close to that of the driving device, for example, the load applied to the bearing of the driving device can be reduced, and the life of the driving device can be extended.

  Moreover, since the load applied to the bearing can be reduced, the drive device can be made compact by reducing the size of the bearing or shortening the bearing pitch.

  Therefore, the depth dimension of the outer box can be reduced, or the volume of the rotating drum can be increased.

  Further, the manufacturing cost can be reduced by downsizing the bearing.

In the drum-type washing and drying machine of one embodiment,
The rear end wall is provided with a plurality of second through holes so as to be positioned higher than the level of the washing water in the rotating drum during washing.

  According to the drum type washing and drying machine of the above embodiment, the second through hole provided in the rear end wall is positioned higher than the level of the washing water in the rotating drum during washing. That is, when a predetermined amount of washing water is stored in the water tank, the surface of the washing water in the rotating drum is located below the second through hole.

  Therefore, it is possible to prevent the washing water from flowing out of the rotary drum from the second through hole.

  Further, when high-temperature and low-humidity air is blown into the rotating drum in order to dry the laundry in the rotating drum, since the second through hole is provided in the rear end wall of the rotating drum, Thus, the air that has become hot and humid can be efficiently discharged from the second through hole to the outside of the rotating drum.

In the drum-type washing and drying machine of one embodiment,
A groove extending from the front end of the peripheral wall toward the rear end of the peripheral wall is provided on the inner surface of the peripheral wall.

  According to the drum type washing and drying machine of the above embodiment, since the groove extends from the front end of the peripheral wall toward the rear end of the peripheral wall on the inner surface of the peripheral wall, when the laundry in the rotating drum is dehydrated, the front end of the peripheral wall Further, the washing water from the laundry is guided to the rear end of the peripheral wall through the groove.

  Therefore, when the laundry in the rotating drum is dehydrated, the washing water discharged from the laundry can be efficiently discharged out of the rotating drum.

  Moreover, since the rigidity of a surrounding wall improves by providing a groove | channel in the inner surface of the said surrounding wall, the thickness of a surrounding wall can be made thin and manufacturing cost can be reduced.

  According to the drum type washing and drying machine of the present invention, when washing water is accumulated in the rotating drum, the rear end wall of the rotating drum is compared with the density of the first through holes in the peripheral wall in the vicinity of the rear end wall of the rotating drum. Since the density of the first through holes in the peripheral walls other than the vicinity is small, the outflow of the washing water from the inside of the rotating drum to the outside of the rotating drum is small in the peripheral walls other than the vicinity of the rear end wall of the rotating drum. Even if a large amount of washing water is not accumulated between the two, the washing water can be accumulated in the rotating drum.

  Therefore, it is possible to obtain a high water-saving effect by reducing the amount of washing water between the rotating drum and the water tank.

  In addition, the washing water in the rotating drum comes out of the rotating drum from the first through hole and accumulates between the rotating drum and the water tank. By supplying the washing water accumulated in the meantime to the drum by the circulation device, The washing water in the rotating drum can be prevented from lowering and the laundry in the rotating drum can be sufficiently washed.

  In addition, when the laundry in the rotating drum is dehydrated, the density of the first through holes in the peripheral wall near the rear end wall of the rotating drum is higher than that of the rotating drum even if the rotating speed of the rotating drum is increased. Since the density of the first through holes in the peripheral wall other than the vicinity of the end wall is small, it is difficult for the laundry to stick to the peripheral wall other than the vicinity of the rear end wall of the rotating drum. As a result, the drying time of the laundry can be shortened.

  Moreover, since the power consumption can be reduced by the amount that the drying time of the laundry can be shortened, an energy saving effect can be obtained.

  Moreover, since it is difficult for the laundry to stick to the peripheral wall other than the vicinity of the rear end wall of the rotating drum, it is possible to reduce the burden on the control for preventing and releasing the sticking of the laundry.

  In addition, when the drying system blows high-temperature and low-humidity air into the rotating drum, the density of the first through holes in the peripheral wall near the rear end wall of the rotating drum is larger than that in the peripheral wall near the rear end wall of the rotating drum. Since the density of the first through holes is small, the high temperature and low humidity air that goes out of the rotating drum before reaching the laundry is reduced, so that the high temperature and low humidity air can be efficiently applied to the laundry. Time can be further reduced.

  Moreover, since the power consumption can be further reduced by the amount that the laundry drying time can be further reduced, the energy saving effect can be further enhanced.

  Hereinafter, the drum type washing and drying machine of the present invention will be described in detail with reference to the illustrated embodiments.

(First embodiment)
FIG. 1 is a schematic cross-sectional view of the drum type washing and drying machine according to the first embodiment of the present invention.

  The drum-type washing and drying machine includes an outer box 101, a bottomed cylindrical water tank 103 disposed in the outer box 101, and a bottomed cylindrical rotary drum 104 rotatably disposed in the water tank 103. And a motor 119 for rotating the rotary drum 104, a drying system 200 for drying the laundry in the rotary drum 104, and a suspension 118 for elastically supporting the water tank 103. The motor 119 is an example of a driving device.

  The outer box 101 has an outer box opening 106 for taking in and out the laundry on the front side. The upper portion of the outer box 101 is formed of a top plate 115, while the lower portion of the outer box 101 is formed of a bottom base 116.

  The outer box opening 106 is opened and closed by sliding the outer door 102 with respect to the outer box 1. A part of the outer door 102 is made of a transparent member so that the inside of the rotary drum 104 can be visually recognized.

  In addition, an operation panel 117 having operation keys and a display unit is provided on the upper portion of the front surface of the outer box 101. On the back side (water tank 103 side) of the operation panel 117, a control unit 114 for controlling the operation of the drum type washing and drying machine is installed. And by the input to the said operation panel 117, a washing process, a rinse process, a dehydration process, and a drying process are performed continuously, or each process is performed independently.

  The central axis of the water tank 103 is inclined with respect to the horizontal plane so that the rear part is lower than the front part. More specifically, the water tank 103 is inclined such that the central axis forms an angle of 5 ° to 30 ° with respect to the horizontal direction. The central axis passes through the position of the center of gravity in a cross section obtained by cutting the water tank 103 along a plane perpendicular to the rotational axis of the rotating drum 104. The central axis is substantially parallel to the rotational axis of the rotary drum 104. Further, a water tank opening 107 that opens to face the outer box opening 106 is provided on the front surface of the water tank 103. The water tank opening 107 can be opened and closed by a hinged inner door 159 attached to the front surface of the water tank 103.

  A packing 105 made of an elastic material such as rubber or soft resin is fixed to the water tank opening 107. Accordingly, when the inner door 159 is closed, the inner door 159 comes into close contact with the packing 105, so that the liquid in the water tank 103 can be prevented from leaking out of the water tank 103.

  Further, a lower end portion of a water supply duct 112 for supplying washing water into the water tank 103 is connected to the upper part of the water tank 103. On the other hand, the upper end of the water supply duct 112 is connected to the lower part of the detergent case 111.

  The detergent case 111 contains a detergent, a bleaching agent, and a softening agent. Further, tap water from the water supply connection port 122 is supplied into the detergent case 111.

  The water supply connection port 122 is supplied with tap water from a tap (not shown). The tap water that has entered the water supply connection port 122 flows through the washing water supply channel 124 when the washing water supply valve 123 is opened, and flows through the drying water supply channel 126 when the drying water supply valve 125 is opened.

  The washing water supply channel 124 has one end connected to the washing water supply valve 123 and the other end connected to the detergent case 111.

  The drying water supply passage 126 has one end connected to the drying water supply valve 125 and the other end connected to a cooling nozzle (not shown).

  On the other hand, a drainage port 128 is provided at the lower part of the water tank 103 to communicate with the air duct 203 and drain the washing water in the water tank 103. The drain port 128 is connected to the upper end of a drain duct 129. On the other hand, the lower end portion of the drainage duct 129 is connected to the drainage hose 131 via the filter device 130. The liquid flowing through the drain duct 129 can flow into the drain hose 131 or the circulation hose 132 after passing through the filter device 130. Since the filter device 130 removes foreign matter such as lint in the liquid flowing in the drain duct 129, foreign matter can be prevented from entering the drain hose 131 or the circulation hose 132.

  The drain hose 131 is provided with a drain valve 134 that is opened and closed by a drain motor 133. The drain valve 134 is controlled to open when the washing water in the drain duct 129 flows to the drain hose 131 and to close when the washing water in the drain duct 129 flows to the circulation hose 132.

  The upper end of the circulation hose 132 is connected to the circulation nozzle 135. The circulation nozzle 135 is located at the lower part of the front surface of the water tank 103 and is directed toward the rotary drum 104. On the other hand, the lower end portion of the circulation hose 132 is connected to a circulation pump 110 disposed behind the filter device 130.

  The circulation pump 110 is a metering pump, and sucks the washing water in the drainage duct 129 through the filter device 130 and discharges the sucked washing water to the circulation hose 132. By operating such a circulation pump 110, the washing water that has flowed out of the water tank 103 from the drain port 128 can be discharged into the rotating drum 104 after passing through the filter device 130. Further, the discharge amount of the circulation pump 110 is the same as the amount of washing water discharged from the small hole 109. The circulation pump 110 is an example of a circulation device.

  The motor 119 is an inverter motor and is attached to the rear end surface (bottom outer surface) of the water tank 103. The motor 119 has a case 136 and a rotor 137 and a stator 138 disposed in the case 136. The stator 138 is fixed to the case 136, and the rotor 137 is fixed to the drive shaft 139 of the rotating drum 104.

  The drive shaft 139 is supported by a bearing 140 fixed to the case 136, and the tip is fixed to the rotary drum 104. Thereby, the rotation of the drive shaft 139 is directly transmitted to the rotary drum 104.

  The rotating drum 104 has a peripheral wall 152, a rear end wall 153 that is continuous with the rear end of the peripheral wall 152, and a front end wall 154 that is continuous with the front end of the peripheral wall 152. The rotating drum 104 is inclined such that a central axis L which is the same axis as the rotating shaft forms an angle of 5 ° to 30 ° with respect to the horizontal direction, and the rear portion is lowered from the front portion.

  The peripheral wall 152 has a plurality of small holes 109. A plurality of baffles 120 and grooves 155 are provided on the inner surface of the peripheral wall 152. The small hole 109 is an example of a first through hole.

  Each of the plurality of small holes 109 is provided only in the peripheral wall 152 in the vicinity of the rear end wall 153. The plurality of small holes 109 are arranged on a straight line in the circumferential direction. The small hole 109 passes through the peripheral wall 152. Thereby, between the space between the water tank 103 and the rotating drum 104 and the space in the rotating drum 104, washing water (water such as tap water or bath water, or water containing detergent) or air Can be distributed.

  Here, the circulation of the washing water through the small holes 109 will be described with reference to FIG. In addition, illustration of the baffle 120 is abbreviate | omitted in FIG.

  When the rotating drum 104 rotates and dehydrates, the washing water contained in the laundry is shaken off by centrifugal force. At this time, the washing water is directed toward the rear end wall 153 along the inner surface of the peripheral wall 152 by a component of gravity in the direction of the central axis L (referred to as “gravity drum axis direction component” in FIG. 2). Moving. As a result, the washing water that has reached the vicinity of the rear end wall 153 goes out of the drum 104 through the small hole 109.

  As shown in FIG. 1, the baffle 120 protrudes radially inward from the peripheral wall 152. In addition, the baffle 120 is arranged at three places, for example, at 120 ° intervals in the circumferential direction. With such a baffle 120, the lifting and dropping of the laundry are repeated as the rotating drum 104 rotates. For example, when the rotating drum 104 is rotated in the washing process, the laundry can be washed by being pulled by the baffle 120 and dropped into the washing water. Such a baffle 120 is formed separately from the rotary drum 104 and then fixed to the peripheral wall 152.

  Each of the plurality of grooves 155 extends in a direction parallel to the central axis L of the rotating drum 104 from the front end of the peripheral wall 152 toward the rear end of the peripheral wall 152.

  FIG. 3 shows a schematic view of the rear end wall 153 viewed from the outside.

  The rear end wall 153 is provided with a plurality of small holes 156 so as to be positioned higher than the washing water level in the rotary drum 104 during washing. In addition, in FIG. 3, the water surface of the washing water at the time of the said washing is shown by the dotted line. The small hole 156 is an example of a second through hole.

  Each of the plurality of small holes 156 passes through the rear end wall 153. Thereby, air can flow between the space between the water tank 103 and the rotating drum 104 and the space in the rotating drum 104.

  As shown in FIG. 1, the front end wall 154 is provided with a drum opening 108 that opens to face the water tank opening 107. A fluid balancer 121 is attached to the front end wall 154 so as to surround the drum opening 108 from the outside.

  The fluid balancer 121 is filled with a liquid having a large specific gravity, such as salt water, and the liquid moves when the rotating drum 104 rotates, thereby canceling the movement of the center of gravity due to the deviation of the laundry and the washing water. The fluid balancer 121 may be provided so as to face the inner peripheral edge of the drum opening 108.

  The drying system 200 includes a blower 201, a heating device 202, a blower duct 203, and a dehumidifying heat exchanger. This dehumidifying heat exchanger is arranged on the back side in the direction perpendicular to the paper surface of FIG. 1 and is hidden by the heating device 202 and the air duct 203, and therefore cannot be seen in FIG.

  The blower 201 is located on the downstream side of the heat exchanger for dehumidification, and sucks air dehumidified by the heat exchanger for dehumidification.

  The heating device 202 is disposed on the downstream side of the blower 201. The heating device 202 includes a heater case 208 and a sheathed heater 209 that is mostly accommodated in the heater case 208.

  The heater case 208 includes a metal main body and a heat-resistant resin frame that fixes the main body. This frame is connected to the air duct 203.

  Since the sheathed heater 209 is arranged so that a part thereof is immersed in the washing water in the water tank 103, the washing water in the water tank 103 can be heated.

  The air duct 203 is disposed in a lower space in the water tank 103. The front end of the air duct 203 serves as an air outlet 205 located between the lower edge of the water tank opening 107 and the lower edge of the drum opening 108.

  The dehumidifying heat exchanger is disposed in the lower part of the space in the water tank 103. The dehumidifying heat exchanger is cooled with tap water ejected from the cooling nozzle. The tap water and the heat exchanger for dehumidification cooled with tap water can cool and dehumidify the air in the water tank 103.

  The suspension 118 is arranged so that the central axis thereof and the center of gravity of the vibrating body are included in the same vertical plane. Here, the vibrating body refers to one configured by the water tank 103, the rotating drum 104, the motor 119, and the drying system 200.

  According to the drum-type washing / drying machine having the above configuration, when the laundry is put into the rotary drum 104, the central axis L is inclined with respect to the horizontal plane so that the rear part of the rotary drum 104 is lowered from the front part. Objects gather near the rear end wall 153. Then, in order to wash the laundry, after storing the wash water between the rotating drum 104 and the water tank 103, the circulation pump 110 is operated. Then, the wash water flows between the rotary drum 104 and the water tank 103 sequentially through the drainage duct 129, the filter device 130, the circulation pump 110, the circulation hose 132, and the circulation nozzle 135, and is discharged into the rotation drum 104. As a result, washing water accumulates in the vicinity of the rear end wall 153 in the rotating drum 104. At this time, since the small hole 109 is provided only in the peripheral wall 152 in the vicinity of the rear end wall 153, the washing water does not flow out of the rotating drum 104 in the peripheral wall 152 other than in the vicinity of the rear end wall 153. That is, the washing water in the rotating drum 104 is unlikely to flow out between the water tank 103 and the rotating drum 104.

  In this way, the washing water in the rotating drum 104 is difficult to flow out between the water tank 103 and the rotating drum 104, and the circulation pump 110 is operated. Therefore, the washing between the rotating drum 104 and the water tank 103 is performed. The water level of the water is lower than the level of the washing water in the rotating drum 104.

  Therefore, the washing water can be stored in the rotating drum 104 without storing a large amount of washing water between the rotating drum 104 and the water tank 103.

  Therefore, a high water-saving effect can be obtained by reducing the amount of washing water supplied to the space between the rotating drum 104 and the water tank 103 at the start of washing.

  Further, since the small hole 156 provided in the rear end wall 153 is positioned higher than the level of the washing water in the rotating drum 104 during washing, the washing water flows out of the rotating drum 104 from the small hole 156. Can be prevented (see FIG. 3).

  Further, the washing water in the rotating drum 104 comes out of the rotating drum 104 through the small hole 109 and is collected between the rotating drum 104 and the water tank 103. The washing water accumulated in the meantime is collected by the circulation pump 110 with the rotating drum 104. Can be released inside.

  Therefore, the level of the washing water in the rotating drum 104 is prevented from lowering, and the laundry in the rotating drum 104 can be sufficiently washed.

  Further, when the laundry in the rotating drum 104 is dehydrated, the small holes 109 are not provided in the peripheral wall 152 other than the vicinity of the rear end wall 153 even if the rotational speed of the rotating drum 104 is increased. It is possible to prevent the laundry from sticking to the peripheral wall 152 other than the vicinity of the wall 153.

  Accordingly, the rotational speed of the rotary drum 104 can be increased to improve the degree of dehydration of the laundry, and as a result, the drying time of the laundry can be shortened.

  Moreover, since the power consumption can be reduced by the amount that the drying time of the laundry can be shortened, an energy saving effect can be obtained.

  Moreover, since it is possible to prevent the laundry from sticking to the peripheral wall 152 other than the vicinity of the rear end wall 153, the burden on the control for preventing the laundry from sticking is reduced. Specifically, the necessity for a draining dewatering step or a loosening step before dehydration for facilitating peeling of the laundry from the peripheral wall 152 of the rotating drum 104 is reduced.

  Further, since the groove 155 extends from the front end of the peripheral wall 152 toward the rear end of the peripheral wall 152 on the inner surface of the peripheral wall 152 of the rotary drum 104, the laundry in the rotary drum 104 is dehydrated from the front end of the peripheral wall 152. The washing water coming out of the laundry at the center is guided to the rear end of the peripheral wall 152 through the groove 155.

  Therefore, when the laundry in the rotating drum 104 is dehydrated, the washing water discharged from the laundry can be efficiently discharged out of the rotating drum 104.

  Further, since the rigidity of the peripheral wall 152 is improved by providing the groove 155 on the inner surface of the peripheral wall 152, the thickness of the peripheral wall 152 can be reduced and the manufacturing cost can be reduced.

  When the laundry in the rotating drum 104 is dried, the drying water supply valve 125 is opened and the blower 201 and the heating device 202 are energized. If it does so, the humid air containing the water | moisture content in the said water tank 103 will be dehumidified by the heat exchanger for dehumidification, and will become low temperature low humidity. This low-temperature and low-humidity air is sent to the heating device 202 by the blower 201. The air heated by the heating device 202 to become high temperature and low humidity is guided to the air duct 203 and blows out into the rotating drum 104 as shown by the arrows in FIG. This high-temperature, low-humidity air takes away moisture from the laundry in the rotating drum 104 and becomes high-temperature and high-humidity toward the dehumidifying heat exchanger. The laundry is dried by such air circulation.

  When the laundry is being dried, since the small holes 109 are not provided in the peripheral wall 152 other than the vicinity of the rear end wall 153, the high-temperature and low-humidity air rotates before contacting the laundry near the rear end wall 153. It is possible to prevent the drum 104 from going out. That is, most of the high-temperature and low-humidity air blown into the rotary drum 104 can be brought out of the rotary drum 104 after being brought into contact with the laundry.

  Therefore, since the high-temperature and low-humidity air can be efficiently brought into contact with the laundry, the drying time of the laundry can be further reduced.

  Moreover, since the power consumption can be further reduced by the amount that the laundry drying time can be further reduced, the energy saving effect can be further enhanced.

  Moreover, since the small hole 156 is provided in the said rear end wall 153, the hot and humid air of the rear end wall 153 vicinity can be efficiently discharged | emitted out of the rotating drum 104 (refer FIG. 3).

  In FIG. 4, the circulation hose 132 and the circulation nozzle 135 are not shown.

  FIG. 5 is a development view of the peripheral wall 552 of the rotating drum of the drum type washer / dryer of the comparative example.

  The drum type washing and drying machine of the comparative example is different from the drum type washing and drying machine of the first embodiment only in that a rotating drum 104 having a peripheral wall 552 is provided.

  In the peripheral wall 552, a small hole 509 is provided over substantially the entire region other than the baffle attachment portion 557. The small hole 509 passes through the peripheral wall 552.

  FIG. 6 is a development view of the peripheral wall 152 of the rotary drum 104 of the drum type washing and drying machine according to the first embodiment.

  As described above, in the peripheral wall 152, the small holes 109 are provided only in the vicinity of the drum rear end (near the rear end wall 153), and the small holes 109 are not provided in the other portions.

  In addition, 157 of FIG. 6 is a baffle attachment part for attaching the baffle 120. Further, the illustration of the groove 155 is omitted in FIG.

  Table 1 below shows specific data of the peripheral wall 552 and the peripheral wall 152.

  In the drum type washer / dryer of the above comparative example, the maximum rotation speed of the rotating drum during dehydration can be increased only to 1100 rpm. This is because if the maximum rotation speed exceeds 1100 rpm, the laundry is stuck to the peripheral wall 552.

  On the other hand, in the drum type washing and drying machine of the first embodiment, since the laundry does not easily stick to the peripheral wall 152, the maximum rotation speed of the rotating drum during dehydration can be increased to 1800 rpm.

  Therefore, as shown in Table 2 below, the drum type laundry dryer of the comparative example can only achieve a dehydration degree of 82%, but the drum type laundry dryer of the first embodiment can achieve a dehydration degree of 86%. .

  Therefore, compared with the drum type laundry dryer of the comparative example, the drum type laundry dryer of the first embodiment can shorten the drying time by 20 to 25 minutes.

  In the first embodiment, the small hole 109 is not provided in the peripheral wall 152 other than the vicinity of the rear end wall 153, but a small hole similar to the small hole 109 may be provided in the peripheral wall 152 other than the vicinity of the rear end wall 153. . However, the density of the small holes provided in the peripheral wall 152 other than the vicinity of the rear end wall 153 is set to be smaller than the density of the small holes 109 provided in the peripheral wall 152 near the rear end wall 153.

  In the first embodiment, the baffle 120 formed separately from the rotating drum 104 is used. However, a baffle formed integrally with the peripheral wall 152 of the rotating drum 104 may be used.

  In the first embodiment, the packing 105 that is not connected to the outer box opening 106 is used, but a packing that is connected to the outer box opening 106 may be used.

  When the packing is used, the outer box opening 106 is connected to the water tank opening 107 via the packing, and the laundry passes through the space inside the packing. That is, the packing forms an access path for taking in and out the laundry. In addition, a bellows or the like may be provided on the packing so as to cause a deflection in accordance with the swing of the water tank 103 and follow it.

  In the first embodiment, the circulation pump 110 that discharges washing water having the same amount as the amount of washing water discharged from the small hole 109 is used, but the amount of washing water discharged from the small hole 109 is larger. A circulation pump that discharges a quantity of washing water may be used.

  In the first embodiment, the structure is such that water is supplied to the space between the water tank 103 and the rotating drum 104, but water may be directly supplied to the space in the rotating drum 104.

  In the first embodiment, the outer box opening 106 is opened and closed by the outer door 102 and the water tank opening 107 is opened and closed by the inner door 109. However, the outer box opening 106 and the water tank are opened by one door. The opening 107 may be opened and closed. That is, the drum-type washing and drying machine of the present invention may be one that opens and closes two doors to put in and out laundry, or one door opens and closes to put in and out laundry. There may be.

(Second Embodiment)
FIG. 7 shows a schematic cross-sectional view of a drum type laundry dryer according to the second embodiment of the present invention. In FIG. 7, the same components as those of the first embodiment shown in FIG. 1 are denoted by the same reference numerals as those of the components in FIG.

  The drum type washing and drying machine of the second embodiment is different from the first embodiment in that it includes a conical rotating drum 704 that is rotatably disposed in the water tank 103.

  The rotating drum 704 has a peripheral wall 752, a rear end wall 753 that is continuous with the rear end of the peripheral wall 752, and a front end wall 754 that is continuous with the front end of the peripheral wall 752. The rotating drum 704 is inclined such that a central axis L which is the same axis as the rotating shaft forms an angle of 5 ° to 30 ° with respect to the horizontal direction, and a rear portion is lowered from a front portion. The rotating drum 704 gradually increases in diameter from the front end of the peripheral wall 752 toward the rear end of the peripheral wall 752.

  The peripheral wall 752 has a plurality of small holes 709. The peripheral wall 752 is inclined so as to form an angle of 0.5 ° to 5 ° with respect to the central axis L. A plurality of baffles 120 and a plurality of grooves 755 are provided on the inner surface of the peripheral wall 752. The small hole 709 is an example of a first through hole.

  Each of the plurality of small holes 709 is provided only in the peripheral wall 752 in the vicinity of the rear end wall 753. The plurality of small holes 709 are arranged on a straight line in the circumferential direction. The small hole 709 passes through the peripheral wall 752. Accordingly, between the space between the water tank 103 and the rotating drum 704 and the space in the rotating drum 704, washing water (water such as tap water or bath water, or water containing detergent) or air Can be distributed.

  The plurality of grooves 755 extend from the front end of the peripheral wall 752 toward the rear end of the peripheral wall 752 so as to form an angle of 0.5 ° to 5 ° with respect to the central axis L of the rotary drum 704. .

  The front end wall 754 is provided with a drum opening 708 that opens to face the water tank opening 107.

  Although not shown, the rear end wall 753 is provided with a plurality of small holes so as to be positioned higher than the level of the washing water in the rotating drum 704 during washing. That is, the rear end wall 753 is provided with a small hole similar to the small hole 156 of the first embodiment. The small hole is an example of a second through hole.

  According to the drum-type washing / drying machine having the above configuration, when the laundry is put into the rotary drum 704, the rotary drum 704 gradually increases in diameter from the front end of the peripheral wall 752 toward the rear end of the peripheral wall 752. The laundry is easily collected near the rear end wall 753 of the rotary drum 704.

  Therefore, since the centrifugal force load generated when the rotating drum 704 rotates is close to the motor 119, the load applied to the bearing 140 of the motor 119 can be reduced, and the life of the motor 119 can be extended.

  Further, since the load applied to the bearing 140 can be reduced, the motor 119 can be made compact by reducing the size of the bearing 140 or shortening the bearing pitch.

  Therefore, the depth dimension of the outer box 101 can be reduced, or the volume of the rotating drum 704 can be increased.

  Further, the manufacturing cost can be reduced by downsizing the bearing 140.

  Further, when the conical rotating drum 704 and the bottomed cylindrical rotating drum 104 of the first embodiment are compared, if the inclination angle of the central axis L with respect to the horizontal plane is the same, the rotating drum 704 rotates. Washing water on the front end wall 754 can be easily sent to the rear end wall 753 at a lower rotational speed than the drum 104.

  That is, the conical rotating drum 704 can obtain a higher dehydrating effect than the bottomed cylindrical rotating drum 104.

  Needless to say, the drum type washing and drying machine of the second embodiment can achieve the same effects as those of the first embodiment.

  The invention made by the present inventor has been specifically described based on the first and second embodiments. However, the invention is not limited to the first and second embodiments, and the gist thereof is as follows. Various changes can be made without departing from the scope.

  For example, the modification of the first embodiment can be applied to the second embodiment. That is, the matters described in the first embodiment may be used in the second embodiment.

FIG. 1 is a schematic cross-sectional view of a drum type washing / drying machine according to a first embodiment of the present invention. FIG. 2 is a schematic diagram for explaining the force that the washing water in the rotating drum receives during dehydration. FIG. 3 is a schematic view of the rear end wall as viewed from the outside. FIG. 4 is a schematic cross-sectional view for explaining a drying process of the drum type laundry dryer of the first embodiment. FIG. 5 is a development view of the peripheral wall of the rotating drum of the drum type washing and drying machine of the comparative example. FIG. 6 is a development view of the peripheral wall of the rotating drum of the drum type washing and drying machine of the first embodiment. FIG. 7 is a schematic cross-sectional view of a drum type washing / drying machine according to a second embodiment of the present invention. FIG. 8 is a schematic cross-sectional view of a conventional drum type washing and drying machine.

Explanation of symbols

101 Outer box 103 Water tank 104, 704 Rotating drum 106 Outer box opening 107 Water tank opening 108 Drum opening 109, 156, 709 Small hole 110 Circulation pump 119 Motor 152, 752 Peripheral walls 153, 753 Rear end wall L Central axis

Claims (4)

An outer box having an outer box opening for taking in and out the laundry at the front;
A water tank disposed in the outer box and having a water tank opening facing the outer box opening;
A rotating drum that is rotatably arranged in the water tank and whose central axis is inclined with respect to a horizontal plane so that the rear part is lower than the front part,
A driving device for rotationally driving the rotating drum;
A circulation device for supplying washing water in the water tank into the rotating drum;
A dehydrating system for drying the laundry in the rotating drum by dehumidifying and heating the air sucked from the rotating drum and blowing the dehumidified and heated air into the rotating drum;
The rotating drum is
A peripheral wall provided with a plurality of first through holes;
A rear end wall connected to the rear end of the peripheral wall,
The drum type laundry drying characterized in that the density of the first through holes in the peripheral wall other than the vicinity of the rear end wall is smaller than the density of the first through holes in the peripheral wall in the vicinity of the rear end wall. Machine. In the drum type washing and drying machine according to claim 1,
The drum-type washing and drying machine, wherein the first through hole is provided only in the peripheral wall in the vicinity of the rear end wall. In the drum type washing and drying machine according to claim 1,
The driving device is attached to the rear of the water tank,
The drum-type washing and drying machine, wherein the rotating drum gradually increases in diameter from the front end of the peripheral wall toward the rear end of the peripheral wall. In the drum type washing and drying machine according to claim 1,
The drum-type washing and drying machine, wherein the rear end wall is provided with a plurality of second through holes so as to be positioned higher than the level of the washing water in the rotating drum during washing.

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