JP4855324B2 - Drum type washer / dryer - Google Patents

Description

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

  As a conventional drum type washing and drying machine, there is one disclosed in Japanese Patent Application Laid-Open No. 2004-194476. This drum type washing and drying machine can dry the laundry by feeding the drying air into the rotary drum from the through hole provided on the rear surface of the rotary drum, and the laundry is biased to the rear surface of the rotary drum. Can be prevented.

  However, in the conventional drum type washing and drying machine, since the drying air is fed into the rotating drum from the through hole provided on the rear surface of the rotating drum, the laundry on the rear surface side of the rotating drum is easy to dry. The laundry on the front side is hard to dry.

  Therefore, since it takes a long time to dry the laundry without unevenness, there is a problem that the time of the drying process becomes long.

  On the other hand, another conventional drum-type washing and drying machine is disclosed in Japanese Patent Application Laid-Open No. 2006-087905. This drum-type washing / drying machine has an air outlet so as to face a drum opening provided on the front surface of the rotating drum, and the air outlet blows drying air into the rotating drum to dry the laundry. .

  Thus, when supplying drying air from the front surface of the rotating drum, the laundry on the front surface side of the rotating drum is easy to dry, but the laundry on the rear surface side of the rotating drum is difficult to dry.

Therefore, the other conventional drum-type laundry dryers also have a problem that the drying process takes a long time because it takes a long time to dry the laundry evenly.
JP 2004-194476 A JP 2006-087905 A

  Therefore, an object of the present invention is to provide a drum-type washing and drying machine that can dry laundry in a short time without unevenness and that can shorten the time of the drying process.

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 has a drum opening facing the water tank opening;
A driving device for rotationally driving the rotating drum;
A blower that sucks in and blows out air in the water tank;
A heating device provided on the downstream side of the blower and heating the air blown out by the blower;
A switching device for switching the destination of the air sucked into the blower;
A front air outlet that is provided to face the drum opening and that blows air from the switching device into the rotating drum,
A rear outlet that is provided at the rear of the rotating drum and blows air from the switching device into the rotating drum;
A control device for controlling the drive device, the blower device, the heating device, and the switching device;
The control device
During the constant rate drying process, air for drying the laundry is blown out from one of the front air outlet and the rear air outlet into the rotating drum , and during the rate decreasing drying process, the laundry is Switching device control means for controlling the switching device so that air for drying is blown out from the other of the front-side outlet and the rear-side outlet into the rotary drum ;
Heating device control means for controlling the heating device so that air is heated by the heating device during the constant rate drying process, and heating of the air by the heating device is stopped during the reduction rate drying process. It is characterized by having.

  According to the drum-type washing and drying machine having the above-described configuration, when the drying process is started, the blower and the heating device are operated, and the drying air flows into the rotating drum. Then, as shown in FIG. 10, the laundry in the rotating drum is dried through a temperature increasing process, a constant rate drying process, and a decreasing rate drying process.

  In the above temperature rising process, the temperature inside the water tank rises with time, but since the heat of drying air is used to heat the water tank, the rotating drum, and the laundry, the water contained in the laundry (hereinafter, “ It is not accompanied by a change in the state of water.

  In the constant rate drying process, since almost all of the heat of the drying air is used for evaporation of the contained water, the temperature in the water tank becomes substantially constant.

  In the decreasing rate drying process, the drying of the laundry progresses, and the evaporation of the contained water is reduced. Therefore, the heat of the drying air is used to warm the water tank, the rotating drum, and the laundry.

  In this way, in the drying through the temperature raising process, the constant rate drying process and the decreasing rate drying process in sequence, the switching device control means does not switch the destination of the air sucked into the air blower during the constant rate drying process, and The switching device is controlled so that the destination of the air sucked into the blower is switched during the rate-decreasing drying process. Thereby, in the constant rate drying process, the drying air is blown out from one of the front outlet and the rear outlet, and in the decreasing rate drying process, the drying air is blown out from the other of the front outlet and the rear outlet. .

  Therefore, when changing from the constant rate drying process to the decreasing rate drying process, the drying air hits the laundry that was difficult to hit the drying air during the constant rate drying process, so the laundry can be dried uniformly in a short time. it can.

  The heating device control means controls the heating device so that air is heated by the heating device during the constant rate drying process, and air heating by the heating device is stopped during the reduction rate drying process. Therefore, the temperature rise of the air in the water tank stops during the rate-decreasing drying process, and the rotating drum does not become excessively hot.

  Therefore, after the drying of the laundry is completed, it is possible to shorten the time of the drying process by eliminating the air for cooling the rotating drum or shortening the time for performing the air blowing.

In the drum-type washing and drying machine of one embodiment,
The control device
Drive device control means for controlling the drive device so that the rotation speed of the rotating drum during the reduction rate drying process is slower than the rotation speed of the rotating drum during the constant rate drying process.

  According to the drum type washing / drying machine of the above-described embodiment, the driving device control means controls the driving device so that the rotation speed during the reduction rate drying process of the rotating drum is rotated during the constant rate drying process of the rotating drum. Since it becomes slower than the speed, the efficiency of sending the drying air into the rotating drum can be increased.

  If the rotation speed of the rotating drum during the rate-decreasing drying process is high, an air flow that inhibits the inflow of drying air into the rotating drum is generated by the rotating drum.

In the drum-type washing and drying machine of one embodiment,
The control device
There is a blower control means for controlling the blower so that the blown amount during the decreasing rate drying process of the blower is larger than the blown amount during the constant rate drying process of the blower.

  According to the drum type washer / dryer of the above embodiment, the air blower control means controls the air blower so that the air flow during the rate-decreasing drying process of the air blower is the same as that during the constant rate drying process of the air blower. Since the air volume is greater than the air volume, the amount of drying air fed into the rotating drum increases during the reduced rate drying process.

  As a result, the evaporation rate of the contained water is increased, and the efficiency of drying the laundry in the rotating drum can be increased.

In the drum-type washing and drying machine of one embodiment,
The rotating drum has a central axis inclined with respect to a horizontal plane so that the rear part is lower than the front part.

In the drum-type washing and drying machine of one embodiment,
During the constant rate drying process, the front air outlet blows air, and the rear air outlet does not blow air,
During the reduction rate drying process, the front outlet does not blow out air, and the rear outlet blows out air.

  According to the drum type washing and drying machine of the present invention, the switching device control means does not switch the destination of the air sucked into the blower during the constant rate drying process, and is sucked into the blower during the decreasing rate drying process. Since the switching device is controlled so that the air destination is switched, drying air is blown out from one of the front outlet and the rear outlet in the constant rate drying process, and the front outlet and the rear in the reduced rate drying process. Drying air blows out from the other side of the side outlet.

  Therefore, when changing from the constant rate drying process to the decreasing rate drying process, the drying air hits the laundry that was difficult to hit the drying air during the constant rate drying process, so the laundry can be dried uniformly in a short time. it can.

  The heating device control means controls the heating device so that air is heated by the heating device during the constant rate drying process, and air heating by the heating device is stopped during the reduction rate drying process. Therefore, the temperature rise of the air in the water tank stops during the rate-decreasing drying process, and the rotating drum does not become excessively hot.

  Therefore, after the drying of the laundry is completed, it is possible to shorten the time of the drying process by eliminating the air for cooling the rotating drum or shortening the time for performing the air blowing.

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

  FIG. 1 is a schematic cross-sectional view of a drum type washing and drying machine according to an 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 a door 102 that is rotatably attached to the outer box 1 by a hinge. A part of the door 102 is made of a transparent member so that the inside of the rotary drum 104 can be visually recognized.

  Further, an operation panel 117 having an input key 401 (see FIG. 4) and a display device 407 (see FIG. 4) is provided on the upper portion of the front surface portion of the outer box 101. On the back side (water tank 103 side) of the operation panel 117, a control device 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.

  A packing 105 made of an elastic material such as rubber or soft resin is fixed to the water tank opening 107. As a result, when the door 102 is closed, the door 102 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 drain outlet 128 for draining the washing water in the water tank 103 is provided in the lower part of 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 drainage duct 129 can flow into the drainage hose 131 or the circulation pump 110 after passing through the filter device 130. Since the filter device 130 removes foreign matter such as lint in the liquid flowing through the drainage duct 129, foreign matter can be prevented from entering the drainage hose 131 or the circulation pump 110.

  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 pump 110.

  The circulation pump 110 can suck the washing water in the water tank 103 through the drainage duct 129 and the filter device 130. The circulation pump 110 discharges the sucked washing water to a circulation hose (not shown). The washing water that has flowed through the circulation hose is blown out from the circulation nozzle (not shown) into the rotary drum 104. That is, when the circulation pump 110 is operated, the wash water in the water tank 103 is sent to the circulation hose by the circulation pump 110 and flows into the rotating drum 104 from the circulation nozzle.

  The circulation nozzle is attached to the lower part of the front surface of the water tank 103 and has a tip facing a drum opening 108 described later.

  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 is a direct drive motor that directly drives the rotary drum 104 to rotate.

  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.

  A plurality of small holes 109 are provided in substantially the entire area of the peripheral wall 152. A baffle 120 is provided on the inner surface of the peripheral wall 152. Only six small holes 109 are shown in FIGS. 1 and 3, and the other small holes 109 are not shown.

  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.

  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.

  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, so that the movement of the center of gravity due to the deviation of the laundry and the washing water is canceled.

  The drying system 200 includes a blower 201, a heating device 202, a first air duct 203, and a dehumidifying heat exchanger 204 (see FIG. 2). The dehumidifying heat exchanger 204 is disposed on the far side in the direction perpendicular to the paper surface of FIG. 1 and is hidden by the heating device 202 and the first air duct 203, and therefore cannot be seen in FIG. 1. The blower 201 is an example of a blower.

  The blower 201 is located on the downstream side of the dehumidifying heat exchanger 204 and sucks and blows in air dehumidified by the dehumidifying heat exchanger 204.

  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 first air duct 203.

  Since the sheathed heater 209 is disposed so as to be immersed in the washing water in the water tank 103, the washing water in the water tank 103 can be heated.

  The first air duct 203 is disposed in the lower part of the space inside the water tank 103. The front end portion of the first air duct 203 is a front 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 204 is disposed in the lower part of the space in the water tank 103. The dehumidifying heat exchanger 204 is cooled by tap water ejected from the cooling nozzle. The tap water and the dehumidifying heat exchanger 204 cooled with the tap water can cool and dehumidify the air in the water tank 103.

  In FIG. 2, the schematic which looked at the said water tank 103 from back is shown.

  The blower 201 includes a fan case 211, a blower fan 212 that is rotatably arranged in the fan case 211, and a fan motor 213 that rotationally drives the blower fan 212.

  A suction port 160 facing the blower fan 212 is provided in the lower part of the rear surface of the water tank 103. The suction port 160 is for sucking the air dehumidified by the dehumidifying heat exchanger 204 into the fan case 211.

  The fan case 211 is provided with an air passage switching valve 214 that switches a destination of air sucked into the fan case 211. The air path switching valve 214 is an example of a switching device.

  The air path switching valve 214 directs the air sucked into the fan case 211 toward the first air duct 203 or toward the second air duct 215.

  The second air duct 215 has a moisture adsorbing material 216 such as silica gel, zeolite, or alumina. The second air duct 215 connects the air path switching valve 214 and the air outlet 161 provided on the rear surface of the water tank 103. The air blown into the water tank 103 from the air outlet 161 can flow into the rotating drum 104 through the rear air outlet 162 as shown in FIG.

  The rear air outlet 162 is provided on the rear end wall 153 of the rotary drum 104 so as to draw a track that overlaps with the air outlet 161 when the rotary drum 104 rotates.

  3, illustration of a part of the blower 201, the second blower duct 215, the blower outlet 161, the air path switching valve 214, the heating device 202, and the like is omitted.

  FIG. 4 shows a control block diagram of the drum type washing and drying machine.

  The control device 114 has a microcomputer 409. The microcomputer 409 includes a CPU (Central Processing Unit) 410, a RAM (Random Access Memory) 411, a ROM (Read Only Memory) 412, a timer 413, a system bus 414, and a plurality of I / O ports 415. ing. The microcomputer 410 operates when a constant voltage is supplied from the power supply circuit 416 to the power supply terminals Vdd and Vss, and receives a signal from the reset circuit 417 at the RESET terminal.

  The CPU 410 includes a control unit 418 and a calculation unit 419. The control unit 418 extracts and executes instructions stored in the ROM 412. The arithmetic unit 419 performs arithmetic operations such as binary addition, logical operation, increase / decrease, and comparison on data input from various input devices and the RAM 411 based on a control signal provided from the control unit 418 in the execution stage of the instruction. I do. Therefore, the ROM 412 previously stores means for operating various devices, conditions set for various determinations, rules for processing various information, and the like.

  Signals from the input key circuit 420 and the state detection circuit 421 are input to the microcomputer 409 via the I / O port 415. The input key circuit 420 is connected to the input key 401. On the other hand, the state detection circuit 421 is connected to the circuit detection device 402, the water level sensor 403, the unbalance detection device 404, the blowing temperature detection device 405, and the aquarium temperature detection device 406.

  The circuit detection device 402 indicates the circuit state, the water level sensor 403 indicates the water level of the washing water in the water tank 103, the unbalance detection device 404 indicates the unbalance of the laundry, and the discharge temperature detection device 405 blows out from the front outlet 205. The water temperature detection device 406 detects the temperature of the air, and the temperature of the air in the water tank 103, respectively.

  The microcomputer 409 performs an operation based on signals from the input key circuit 420 and the state detection circuit 421, and controls the output of the display device driving circuit 422, the buzzer driving circuit 423, and the load driving circuit 424.

  An output signal of the display device driving circuit 422 is input to the display device 407. More specifically, the display device drive circuit 422 causes the display device 407 to display a figure, characters, and the like for showing information related to washing to the user.

  The output signal of the buzzer driving circuit 423 is input to the buzzer 408. More specifically, the buzzer drive circuit 423 sounds the buzzer 408 to notify the user when the input of the input key 401 is completed, when the operation is completed, or when an abnormality occurs.

  The load drive circuit 424 operates the motor 119, the washing water supply valve 123, the drying water supply valve 125, the drainage motor 133, the sheathed heater 209, the fan motor 213, the air path switching valve 214, and the like.

  Hereinafter, the drying process of the drum type washing and drying machine will be described with reference to the flowchart of FIG.

  When the drying process starts, first, as shown in FIG. 5, the sheathed heater 209 and the fan motor 213 are turned on in step S101. As a result, the blower fan 212 rotates, and the air in the water tank 103 is sucked into the fan case 211 and sent to the sheathed heater 209. The air is heated by the sheathed heater 209 and then guided to the first air duct 203 and blown out from the front air outlet 205 into the rotary drum 104 (see FIG. 1).

  When the sheathed heater 209 and the fan motor 213 are turned on, the drying water supply valve 125 is opened, and tap water is supplied to the dehumidifying heat exchanger 204. Thereby, the blower 201 can be dehumidified by the tap water and the heat exchanger for dehumidification 204 and suck in air.

  Next, capacitive sensing is performed in step S102. That is, the amount of laundry stored in the rotating drum 104 is detected. The amount of laundry detected in step S102 is stored in the control device 114.

  Next, in step S103, the operation guide time corresponding to the amount of laundry is displayed on the display device 407.

  Next, in step S104, the motor 119 is turned on, and the rotation of the rotary drum 104 is controlled according to a predetermined rotation chart.

  Next, in step S105, it is determined whether or not the water tank temperature is equal to or higher than a predetermined temperature. If it is determined in step S105 that the water tank temperature is equal to or higher than the predetermined temperature, the process proceeds to step S106. On the other hand, if it is determined in step S105 that the water tank temperature is lower than the predetermined temperature, step S105 is performed again.

  That is, in step S105, it is determined whether the laundry has entered the rate-decreasing drying process from the constant rate drying process. If it is determined that the laundry has entered the rate-decreasing drying process, the process proceeds to the next step S106.

  Next, in step S106, the front balloon is changed to the rear balloon. More specifically, the air path switching valve 214 is switched to change the destination of the air sucked into the fan case 211 from the first air duct 203 to the second air duct 215. As a result, the air is dehumidified by the moisture adsorbing material 216, guided to the second air duct 215, blown out from the air outlet 161, and flows into the rotary drum 104 from the rear air outlet 162 (see FIG. 3). ).

  Next, in step S107, the sheathed heater 209 is turned off. As a result, the heating of the air by the sheath heater 209 is stopped, but the temperature of the air in the water tank 103 is sufficiently high, so the air blown into the rotary drum 104 from the rear outlet 162 is used to wash the laundry. Drying proceeds.

  Next, in step S108, it is determined whether or not a predetermined time has elapsed. If it is determined in step S108 that the predetermined time has elapsed, the process proceeds to step S109. On the other hand, if it is determined in step S108 that the predetermined time has not elapsed, step S108 is performed again.

  Next, when the motor 119 and the fan motor 213 are turned off in step S109, the drying process ends.

  That is, in the drying process, Step S105 and Step S106 constitute an example of the switching device control means, and Step S105 and Step S107 constitute an example of the heating device control means.

  In this manner, during the constant rate drying process, drying air is blown out from the front blower outlet 205, while drying air is not blown out from the rear blower 162. Then, during the rate-of-decreasing drying process, the drying air is not blown out from the front air outlet 205, while the drying air is blown out from the rear air outlet 162.

  Therefore, the drying air is effectively applied to the laundry that has not been effectively applied with the drying air in the constant rate drying process, that is, the laundry on the rear end wall 153 side of the rotary drum 104 in the decreasing rate drying process. The laundry in the rotating drum 104 can be dried without unevenness in a short time.

  Further, since the sheathed heater 209 is turned off in the above-described reduction drying process, the temperature rise of the air in the water tank 103 is stopped and the rotating drum 104 is not excessively heated.

  Therefore, after the laundry is dried, air for cooling the rotary drum 104 can be eliminated, and the time for the drying process can be shortened.

  FIG. 6 shows a rotation chart of the rotary drum 104.

  The rotating drum 104 repeats right rotation and left rotation alternately after the motor 119 is turned on. At this time, in the temperature raising process and the constant rate drying process, the supply of the drying air into the rotary drum 104 is performed only through the front air outlet 205. Then, the drying air is supplied into the rotary drum 104 only through the rear outlet 162 from the above-mentioned reduction rate drying process until the motor 119 and the fan motor 213 are turned off.

  The maximum rotation speed of the rotating drum 104 when the front air outlet 205 blows drying air is the same as the maximum rotation speed of the rotating drum 104 when the rear air outlet 162 blows drying air. Is set to

  When the front air outlet 205 blows drying air, the time during which the rotating drum 104 rotates to the right is set equal to the time during which the rotating drum 104 rotates to the left.

  Also, when the rear air outlet 162 blows drying air, the time during which the rotating drum 104 is rotating clockwise is set to be the same as the time during which the rotating drum 104 is rotating counterclockwise.

  Further, the rotational speed of the blower fan 212 when the front air outlet 205 blows out the drying air is set to be the same as the rotational speed of the blower fan 212 when the rear air outlet 162 blows out the drying air. Has been.

  In the above embodiment, the rotary drum 104 is controlled by the rotation chart of FIG. 6 during the drying process, but the rotary drum 104 may be controlled by the rotation chart of FIG.

  That is, the maximum rotational speed of the rotating drum 104 when the rear air outlet 162 blows drying air, compared to the maximum rotational speed of the rotating drum 104 when the front air outlet 205 blows drying air. You may slow down. For example, the maximum rotational speed of the rotating drum 104 when the front air outlet 205 is blowing out drying air is set to 160 rpm, and the highest speed of the rotating drum 104 when the rear air outlet 162 is blowing out drying air. The rotation speed may be set to 80 rpm.

  Hereinafter, the drying process in which the rotary drum 104 is controlled by the rotation chart of FIG. 7 will be described using the flowchart of FIG. 11.

  When the drying process starts, first, as shown in FIG. 11, the sheathed heater 209 and the fan motor 213 are turned on in step S201. As a result, the blower fan 212 rotates, and the air in the water tank 103 is sucked into the fan case 211 and sent to the sheathed heater 209. The air is heated by the sheathed heater 209 and then guided to the first air duct 203 and blown out from the front air outlet 205 into the rotary drum 104 (see FIG. 1).

  When the sheathed heater 209 and the fan motor 213 are turned on, the drying water supply valve 125 is opened, and tap water is supplied to the dehumidifying heat exchanger 204. Thereby, the blower 201 can be dehumidified by the tap water and the heat exchanger for dehumidification 204 and suck in air.

  Next, capacitive sensing is performed in step S202. That is, the amount of laundry stored in the rotating drum 104 is detected. The amount of laundry detected in step S202 is stored in the control device 114.

  Next, in step S203, the operation guide time corresponding to the amount of laundry is displayed on the display device 407.

  Next, in step S204, the motor 119 is turned on, and the rotation of the rotary drum 104 is controlled according to a predetermined rotation chart.

  Next, in step S205, it is determined whether or not the water tank temperature is equal to or higher than a predetermined temperature. If it is determined in step S205 that the temperature in the water tank is equal to or higher than the predetermined temperature, the process proceeds to step S206. On the other hand, if it is determined in step S205 that the water tank temperature is lower than the predetermined temperature, step S205 is performed again.

  That is, in step S205, it is determined whether the laundry has entered the rate-decreasing drying process from the constant rate drying process. If it is determined that the laundry has entered the rate-decreasing drying process, the process proceeds to the next step S206.

  Next, in step S206, the front balloon is changed to the rear balloon. More specifically, the air path switching valve 214 is switched to change the destination of the air sucked into the fan case 211 from the first air duct 203 to the second air duct 215. As a result, the air is dehumidified by the moisture adsorbing material 216, guided to the second air duct 215, blown out from the air outlet 161, and flows into the rotary drum 104 from the rear air outlet 162 (see FIG. 3). ).

  Next, in step S207, the sheathed heater 209 is turned off. As a result, the heating of the air by the sheath heater 209 is stopped, but the temperature of the air in the water tank 103 is sufficiently high, so the air blown into the rotary drum 104 from the rear outlet 162 is used to wash the laundry. Drying proceeds.

  Next, in step S208, the motor 119 is controlled to reduce the rotation speed of the rotary drum 104.

  Next, in step S209, it is determined whether a predetermined time has elapsed. If it is determined in step S209 that the predetermined time has elapsed, the process proceeds to step S209. On the other hand, if it is determined in step S209 that the predetermined time has not elapsed, step S209 is performed again.

  Next, when the motor 119 and the fan motor 213 are turned off in step S210, the drying process ends.

  That is, in the drying process, Step S205 and Step S206 constitute an example of the switching device control means, Step S205 and Step S207 constitute an example of the heating device control means, and Step S205 and Step S208 are driven. An example of the device control means is configured.

  As described above, the maximum rotation speed of the rotating drum 104 when the rear air outlet 162 blows drying air is higher than the maximum rotation speed of the rotating drum 104 when the front air outlet 205 blows drying air. By reducing the rotation speed, the efficiency of sending the drying air into the rotary drum 104 can be increased.

  If the maximum rotation speed of the rotating drum 104 is high when the rear air outlet 162 is blowing drying air, the rotating drum 104 generates an air flow that hinders the inflow of the drying air into the rotating drum 104. Will occur.

  Note that step S207 and step S208 may be performed simultaneously, or step S207 may be performed after step S208.

  In the above embodiment, the rotating drum 104 is controlled by the rotation chart of FIG. 6 during the drying process, but the rotating drum 104 may be controlled by the rotation chart of FIG.

  That is, when the front air outlet 205 blows drying air, the time during which the rotating drum 104 rotates to the right is made the same as the time during which the rotating drum 104 rotates to the left, and the rear air outlet When 162 is blowing out the drying air, the time during which the rotating drum 104 rotates to the right may be longer than the time during which the rotating drum 104 rotates to the left.

  Thus, when the rear outlet 162 blows out the drying air, the time during which the rotating drum 104 rotates to the right is made longer than the time during which the rotating drum 104 rotates to the left, The distance between the rear outlet 162 and the inlet 160 can be increased.

  Therefore, the drying air blown out from the rear outlet 162 can be sufficiently distributed in the rotary drum 104.

  Similarly to the rotation chart of FIG. 8, when the front air outlet 205 blows drying air, the time during which the rotating drum 104 rotates to the right is the same as the time during which the rotating drum 104 rotates to the left. In addition, when the rear air outlet 162 is blowing air for drying, the time during which the rotating drum 104 is rotating left may be longer than the time during which the rotating drum 104 is rotating right.

  In short, if the ratio of the time during which the rotating drum 104 rotates to the right and the time during which the rotating drum 104 rotates to the left is set so that the distance between the rear outlet 162 and the suction port 160 is increased. Good.

  In the said embodiment, the rotational speed of the ventilation fan 212 when the said front side blower outlet 205 is blowing out the drying air is the rotational speed of the ventilation fan 212 when the rear side outlet 162 is blowing out the drying air. The air blowing fan when the rear air outlet 162 is blowing out the drying air as compared with the rotational speed of the air blowing fan 212 when the front air outlet 205 is blowing out the drying air. The rotational speed of 212 may be increased.

  For example, the rotational speed of the blower fan 212 when the front air outlet 205 blows drying air is set to 3500 rpm, and the blower fan 212 when the rear blower 162 blows drying air. The rotation speed may be set to 3800 rpm.

  Hereinafter, the drying process for increasing the rotational speed of the blower fan 212 when the rear air outlet 162 is blowing out the drying air will be described with reference to the flowchart of FIG.

  When the drying process starts, first, as shown in FIG. 12, in step S301, the sheathed heater 209 and the fan motor 213 are turned on. As a result, the blower fan 212 rotates, and the air in the water tank 103 is sucked into the fan case 211 and sent to the sheathed heater 209. The air is heated by the sheathed heater 209 and then guided to the first air duct 203 and blown out from the front air outlet 205 into the rotary drum 104 (see FIG. 1).

  When the sheathed heater 209 and the fan motor 213 are turned on, the drying water supply valve 125 is opened, and tap water is supplied to the dehumidifying heat exchanger 204. Thereby, the blower 201 can be dehumidified by the tap water and the heat exchanger for dehumidification 204 and suck in air.

  Next, capacitive sensing is performed in step S302. That is, the amount of laundry stored in the rotating drum 104 is detected. The amount of laundry detected in step S302 is stored in the control device 114.

  Next, in step S303, the operation guide time corresponding to the amount of laundry is displayed on the display device 407.

  Next, in step S304, the motor 119 is turned on, and the rotation drum 104 is controlled to rotate according to a predetermined rotation chart.

  Next, in step S305, it is determined whether or not the water tank temperature is equal to or higher than a predetermined temperature. If it is determined in step S305 that the water tank temperature is equal to or higher than the predetermined temperature, the process proceeds to step S306. On the other hand, if it is determined in step S305 that the water tank temperature is lower than the predetermined temperature, step S305 is performed again.

  That is, in the above step S305, it is determined whether the laundry has entered the decreasing rate drying process from the constant rate drying process, and if it is determined that the laundry has entered the decreasing rate drying process, the process proceeds to the next step S306.

  Next, in step S306, the front balloon is changed to the rear balloon. More specifically, the air path switching valve 214 is switched to change the destination of the air sucked into the fan case 211 from the first air duct 203 to the second air duct 215. As a result, the air is dehumidified by the moisture adsorbing material 216, guided to the second air duct 215, blown out from the air outlet 161, and flows into the rotary drum 104 from the rear air outlet 162 (see FIG. 3). ).

  Next, in step S307, the sheathed heater 209 is turned off. As a result, the heating of the air by the sheath heater 209 is stopped, but the temperature of the air in the water tank 103 is sufficiently high, so the air blown into the rotary drum 104 from the rear outlet 162 is used to wash the laundry. Drying proceeds.

  Next, in step S308, the fan motor 213 is controlled to increase the rotational speed of the blower fan 212.

  Next, in step S309, it is determined whether a predetermined time has elapsed. If it is determined in step S309 that the predetermined time has elapsed, the process proceeds to step S310. On the other hand, if it is determined in step S309 that the predetermined time has not elapsed, step S309 is performed again.

  Next, when the motor 119 and the fan motor 213 are turned off in step S310, the drying process ends.

  That is, in the drying process, Step S305 and Step S306 constitute an example of the switching device control means, Step S305 and Step S307 constitute an example of the heating device control means, and Step S305 and Step S308 are the air blowers. An example of the device control means is configured.

  As described above, the rotational speed of the blower fan 212 when the rear blower 162 is blowing out the drying air is higher than the rotational speed of the blower fan 212 when the front blower 205 is blowing out the drying air. By increasing the speed, the amount of drying air blown from the rear outlet 162 becomes larger than the amount of drying air blown from the front outlet 205. That is, compared with the blowing rate of the drying air during the constant rate drying process, the blowing rate of the drying air during the decreasing rate drying process is increased.

  Therefore, the evaporation of moisture in the laundry can be promoted during the rate-decreasing drying process, and the efficiency of drying the laundry in the rotating drum 104 can be increased.

  Note that step S307 and step S308 may be performed simultaneously, or step S307 may be performed after step S308.

  Moreover, you may perform said step S308 at the drying process of FIG. In this case, step S308 may be performed between step S208 and step S209, or may be performed simultaneously with step S207 or step S208. Or you may make it perform said step S308, step S207, and step S208 simultaneously.

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

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

  In the above embodiment, the outer box opening 106 and the water tank opening 107 are opened and closed by the door 102, but the outer box opening 106 is opened and closed by the outer door, and the water tank opening 107 is opened by the inner door. You may make it open and close. In other words, the drum-type washing and drying machine of the present invention may be one that opens and closes one door to put in and out laundry, or two doors that open and close to put in and out laundry. There may be.

  In the above embodiment, the second air duct 215 has the moisture adsorbing material 216 such as silica gel, zeolite, and alumina. A heating unit that can heat the air flowing in the second air duct 215 may be provided instead of the moisture adsorbing material 216.

  In the above embodiment, the air outlet 161 and the air path switching valve 214 are connected by the second air duct 215. However, as shown in FIG. 9, the air outlet 161 and the air path switching valve 214 are connected by the second air duct. You may connect with the duct 915. FIG.

  The second air duct 915 does not have a moisture adsorbing material such as silica gel, zeolite, or alumina, or a heating unit that can heat the air flowing through the second air duct 915.

  When such a second air duct 915 is used, the fan case 211 may be provided with a heating unit 902 that can heat the air toward the first air duct 203 or the second air duct 915.

  When the heating unit 902 is provided in the fan case 211, the installation of the heating device 202 can be omitted.

  Further, by providing the heating unit 902 in the fan case 211, the air heated by the heating unit 902 can be sent to both the front air outlet 205 and the rear air outlet 162.

  In the above embodiment, during the temperature raising process and the constant rate drying process, only the front air outlet 205 blows out the drying air, and the period from the decreasing rate drying process until the motor 119 and the fan motor 213 are turned off. The rear air outlet 162 only blows out the drying air. However, during the temperature raising process and the constant rate drying process, only the rear air outlet 162 blows out the drying air and the rate-decreasing drying process. Until the motor 119 and the fan motor 213 are turned off, only the front air outlet 205 may blow the drying air. When such control is performed, it is preferable to have a structure as shown in FIG.

  Further, as a method of reducing the drying unevenness of the laundry in the rotary drum 104, the time required for the front air outlet 205 to blow the drying air based on the amount of laundry detected by the capacity sensing, and the rear air outlet The ratio of the time 162 takes out the drying air may be changed. For example, when the amount of the laundry is small, the time when the front air outlet 205 blows drying air is longer than the time when the front air outlet 205 blows drying air when the amount of laundry is large. May be. Specifically, assuming that the time at which the front air outlet 205 blows drying air is the front air blowing time and the time at which the rear air outlet 162 blows the drying air is the rear air blowing time, the front air blowing time and the rear air blowing time. The time may be set as shown in Table 1 below.

  Note that “until the end of the rear side blowing time” means the time from when the front side blowing time has elapsed until it is determined that the laundry has been dried evenly.

FIG. 1 is a schematic cross-sectional view of a drum type laundry dryer according to an embodiment of the present invention. FIG. 2 is a schematic view of the water tank of the drum type washing and drying machine as viewed from the rear. FIG. 3 is another schematic cross-sectional view of the drum type washing and drying machine. FIG. 4 is a control block diagram of the drum type washing and drying machine. FIG. 5 is a flowchart of the drying process of the drum type washing and drying machine. FIG. 6 is a rotation chart of the rotating drum during the drying process of the drum type washing and drying machine. FIG. 7 is a modification of the rotation chart of the rotating drum during the drying process of the drum type washing and drying machine. FIG. 8 is a modification of the rotation chart of the rotating drum during the drying process of the drum type washing and drying machine. FIG. 9 is a schematic view of a water tank of a modified example of the drum type washing and drying machine as seen from the rear. FIG. 10 is a graph for explaining the drum type washing and drying machine of the present invention. FIG. 11 is a flowchart of another drying process of the drum type laundry dryer. FIG. 12 is a flowchart of another drying process of the drum type washing and drying machine.

DESCRIPTION OF SYMBOLS 101 Outer box 103 Water tank 104 Rotating drum 106 Outer box opening 107 Water tank opening 108 Drum opening 114 Control device 119 Motor 201 Blower 202 Heating device 214 Air path switching valve

Claims (3)

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 has a drum opening facing the water tank opening;
A driving device for rotationally driving the rotating drum;
A blower that sucks in and blows out air in the water tank;
A heating device provided on the downstream side of the blower and heating the air blown out by the blower;
A switching device for switching the destination of the air sucked into the blower;
A front air outlet that is provided to face the drum opening and that blows air from the switching device into the rotating drum,
A rear outlet that is provided at the rear of the rotating drum and blows air from the switching device into the rotating drum;
A control device for controlling the drive device, the blower device, the heating device, and the switching device;
The control device
During the constant rate drying process, air for drying the laundry is blown out from one of the front air outlet and the rear air outlet into the rotating drum , and during the rate decreasing drying process, the laundry is Switching device control means for controlling the switching device so that air for drying is blown out from the other of the front-side outlet and the rear-side outlet into the rotary drum ;
Heating device control means heating device for controlling the heating device so that air heating by the heating device is performed during the constant rate drying process and heating of the air by the heating device is stopped during the reduction rate drying process And a drum-type washing and drying machine. In the drum type washing and drying machine according to claim 1,
The control device
It has drive device control means for controlling the drive device so that the rotation speed of the rotating drum during the rate-decreasing drying process is slower than the rotation speed of the rotating drum during the constant rate drying process. Drum type washing and drying machine. In the drum type washing and drying machine according to claim 1,
The control device
It has a blower control means for controlling the blower so that the blown amount during the decreasing rate drying process of the blower is larger than the blown amount during the constant rate drying process of the blower. Drum type washing and drying machine.

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