JP3622074B2 - Drum-type drying washing machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a drum-type drying washing machine, and more particularly, to a drum-type drying washing machine that operates in each process from washing to drying while the laundry is stored in the drum.
[0002]
[Prior art]
Conventionally, a drum-type drying washing machine has a structure in which a drum rotates around a horizontal axis in a water tank as described in, for example, JP-A-8-80396. Since it can be performed on the same drum, it is a typical drum-type drying washing machine having functions from washing, dehydration to drying. A schematic configuration of such a conventional drum-type drying washing machine will be described below.
[0003]
FIG. 5 is a side longitudinal sectional view schematically showing an example of a conventional drum-type drying washing machine, and FIG. 6 is also a front longitudinal sectional view. In these drawings, 1 is an outer box constituting the outer shell of the apparatus, 2 is a bottomed water tank provided in the outer box 1, for example, a substantially cylindrical water tank, and 5 is provided in the water tank 2. This is a rotating drum having a bottomed and substantially cylindrical shape. The water tank 2 is swingably supported by a spring 3 extending downward from the upper inner wall of the outer box 1 and a shock absorber 4 extending upward from the bottom. Has the function of storing and discharging.
[0004]
The rotating drum 5 has a rotating shaft 7 extending outward from the vicinity of the bottom center of the rotating drum 5, passes through the vicinity of the center of the bottom of the water tank 2, and is supported by a bearing 2 a provided at the bottom. Further, a drive motor 6 comprising a ring-shaped stator 6a and a disk-shaped rotor 6b is attached to the bottom of the water tank 2, and the stator 6a is fixed to the bearing 2a of the water tank 2, and the rotor 6b is located at the center thereof. It is being fixed to the front-end | tip of the rotating shaft 7 in the vicinity.
[0005]
Here, the rotating shaft 7 is disposed so that the rotating drum 5 is slightly upward from the horizontal axis H, and is driven by the drive motor 6 so that the rotating drum 5 moves in the water tank 2 by, for example, an arrow P. Rotate in the direction. The water tank 2 is inclined substantially in the same direction as the outer side of the rotating drum 5, and the cross section in a direction perpendicular to the rotating shaft 7 is arranged substantially concentrically.
[0006]
Further, the rotary drum 5 has an opening 5a through which the laundry is taken in and out, and the whole peripheral wall is used for passing water for washing, draining for dehydration, warm air for drying, and the like. In addition, a large number of small holes 5b are provided. Further, a ring-shaped fluid balancer B is fixed around the outside of the opening 5a so that the rotating drum 5 maintains a stable rotation. The fluid balancer B may be provided inside the opening 5a. Further, T is a protrusion provided at a plurality of locations on the inner periphery of the rotating drum 5, thereby stirring the laundry. The laundry is not shown.
[0007]
Further, a door 8 for taking in and out the laundry is provided in front of the dry washing machine, and the water tank 2 is sealed by closing the door 8 and sandwiching the door packing 9 between the water tank 2. , Washing water and the like are not leaked outside the machine. Reference numeral 11 denotes a detergent case, which is not shown in detail, but has a detergent chamber and a finisher chamber, and is detachably provided on the front surface of the outer box 1.
[0008]
In the upper part of the outer box 1, water supply valves 12 and 13 are respectively provided where the water supply pipe A inserted from the rear part is branched, and the water supply valve 12 is connected to the detergent chamber of the detergent case 11 by a pipe 12a. The water supply valve 13 communicates with the finisher chamber of the detergent case 11 through a pipe 13a. Further, the water supply nozzle 14 communicates the detergent chamber and the finishing agent chamber of the detergent case 11 with the water tank 2. Water from the water supply pipe A is supplied into the rotary drum 5 from the water supply nozzle 14 through the detergent case 11 as shown by an arrow d and the like.
[0009]
Reference numeral 15 denotes a filter case, which has a built-in lint filter 16 that captures foreign matter and the like from the laundry, and is detachably provided on the lower front surface of the outer box 1. The lint filter 16 is formed in a lattice shape with fibers or resin, and is detachable from the filter case 15. The filter case 15 communicates with the lower part of the water tank 2 through the drain pipe 17 and further communicates with the water level sensor 18 through the pressure guiding pipe 19. Further, the filter case 15 communicates with the drain valve 20 through the drain pipe 21. The drain valve 20 communicates with the outside of the washing machine through a drain pipe 22.
[0010]
Reference numeral 23 denotes a circulation pump. The suction side is connected to the drain pipe 21, the discharge side is connected to the discharge pipe 24, and the discharge pipe 24 communicates with the upper part of the water tank 2. The discharge pipe 24 re-supplys the washing liquid and the rinsing liquid as circulating water, and circulates the circulating water once passed through the lint filter 16 as indicated by arrows a and b as indicated by arrow c. It is circulated by the pump 23 and circulated and supplied into the rotating drum 5 by this discharge pipe 24 as indicated by an arrow W. In FIG. 6, the drain valve 20, drain pipe 21, circulation pump 23, discharge pipe 24, etc. are not shown.
[0011]
Such a drum-type drying washing machine is configured to perform washing, rinsing, dehydration, and drying continuously or independently for the laundry inside while rotating the rotary drum 5. In particular, in the drying process, as shown in FIG. 6, the air in the water tank 2 is circulated by the exhaust duct 53 that is connected to the upper part of the water tank 2 and is connected to the upper part, thereby drying the laundry. At this time, the hot air supply means 50 comprising the blower fan 51 and the heater 52 provided at the upper part in the exhaust duct 53 is operated, and the air in the water tank 2 circulates in the exhaust duct 53 in the direction indicated by the arrow f. Then, it is heated by the heater 52, and flows again into the water tank 2 and eventually into the rotating drum 5 by the blower fan 51. Then, moisture contained in the laundry is absorbed and circulated in the exhaust duct 53 again.
[0012]
Here, a sprinkler pipe 54a connected from the outside to the exhaust duct 53 is inserted at a position in front of the blower fan 51. By opening a water supply valve 54 provided in the middle of the sprinkler pipe 54a, the sprinkler pipe 54a is inserted into the exhaust duct 53 from here. Watered. The sprayed water contacts the warm air in the exhaust duct 53 to cool it, and moisture contained in the warm air is condensed to remove it. The cooled hot air is reheated by the heater 52 to become hot air of high temperature and low humidity, recirculated in the rotating drum 5, and again absorbs moisture contained in the laundry. In this way, the air in the water tank 2 is circulated while being heated and cooled, and the laundry is dried by repeating this.
[0013]
[Problems to be solved by the invention]
However, in the above-described configuration, particularly in the drying process, foreign matters such as lint from the laundry may circulate along the circulation path along with warm air, and may adhere to the intermediate path. In the first place, most conventional drum-type drying washing machines can not only be performed continuously from washing to drying, but also can be set to the user's preference such as operation only in each step, When only the drying process as described above is repeated, there is a problem that foreign matters such as yarn waste adhere to and accumulate in the circulation path of the hot air.
[0014]
If the accumulation of such contaminants increases, the circulation of hot air is hindered and the flow rate decreases, so that each control in the drying process does not function properly, and abnormally high temperature air is supplied to the laundry. Or, the drying time becomes longer, causing shrinkage and discoloration of the laundry, and further, the laundry and the foreign matter are ignited. In view of such problems, the present invention provides a drum-type drying washing machine that has a function of ensuring a warm air path during a drying process and preventing accidents in particular when repeated drying operations are performed. The purpose is to do.
[0015]
[Means for Solving the Problems]
To achieve the above object, according to the present invention, a water tank, a rotating drum rotatably disposed in the water tank, and a circulation path for circulating the air in the water tank are accommodated in the rotating drum. A hot air supply means for supplying hot air for drying the washed laundry, a storage means for storing a history of the drying operation, and a history of the drying operation stored by the storage means, reaching a predetermined history value. A control means for stopping operation or reporting an abnormality as an abnormal state in which impurities from the laundry are accumulated in the circulation path of the warm air,A door for putting laundry in and out of the rotating drum; and an open / close detecting means for detecting an open / closed state of the door. After the abnormal state is detected, the opening / closing operation of the door is detected by the open / close detecting means. Sometimes either washing or rinsing or tank washingThe configuration is to be performed.
In the drum-type drying washing machine having the above-described configuration, circulation means for re-supplying water discharged from the water tank to the water tank as circulation water, branching from the circulation means, and a part of the circulation water for circulating hot air And a cleaning means for supplying and cleaning.
The drum-type drying washing machine having the above-described configuration may include water supply means for supplying water to the hot air circulation path.
[0017]
Moreover, the said warm air supply means is set as the structure provided with the ventilation fan and the heater.Moreover, the said operation stop can also be set as the structure performed after cooling the said warm air. Further, it is possible to adopt a configuration in which the drying operation is not started unless the abnormal state is resolved.
[0018]
Moreover, it is set as the structure which performs either a washing operation, a rinse operation, or a tank washing operation regularly. Further, in the configuration for storing the history of the drying operation, when the washing operation, the rinsing operation, or the tank cleaning operation is performed, the value accumulated and stored by the storage unit is reset.
[0020]
In all the above configurationsThe warm air supply means can be operated intermittently.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an external appearance of a drum-type drying washing machine according to the present invention. In the figure, 1 is an outer box, and 8 provided on the front is a door for taking in and out laundry. Further, 10 provided on the right side of the front upper portion is an operation / display unit, and 11 provided on the left side is a detergent case. Reference numeral 15 provided on the lower right side of the front is a filter case. The operation / display unit 10 is provided with a power switch, an operation start button, a button for selecting a water level and a course, and the operation selected by the operation / display unit 10 is placed in the outer box 1 on the back surface. A control circuit to control is installed. Details will be described later.
[0022]
FIG. 2 is a side longitudinal sectional view schematically showing an example of the drum-type drying washing machine of the present invention, and FIG. 3 is a front longitudinal sectional view. As is apparent from these drawings, the basic configuration of the drum-type drying washing machine of the present invention is similar to the conventional drum-type drying washing machine. The structure of the main part will be described again. As shown in these drawings, 1 is an outer box constituting the outer shell of the apparatus, 2 is a bottomed water tank provided in the outer box 1, for example, substantially cylindrical. Reference numeral 5 denotes a rotating drum having a substantially cylindrical shape with a bottom provided in the water tank 2. The water tank 2 is swingably supported by a spring 3 extending downward from the top of the inner wall of the outer box 1 and a shock absorber 4 extending upward from the bottom. Has the function of storing and discharging.
[0023]
The rotating drum 5 has a rotating shaft 7 extending outward from the vicinity of the bottom center of the rotating drum 5, passes through the vicinity of the center of the bottom of the water tank 2, and is supported by a bearing 2 a provided at the bottom. Further, a drive motor 6 comprising a ring-shaped stator 6a and a disk-shaped rotor 6b is attached to the bottom of the water tank 2, and the stator 6a is fixed to the bearing 2a of the water tank 2, and the rotor 6b is located at the center thereof. It is being fixed to the front-end | tip of the rotating shaft 7 in the vicinity.
[0024]
Here, the rotating shaft 7 is disposed so that the rotating drum 5 is slightly upward from the horizontal axis H, and the rotating drum 5 rotates in the water tank 2 by being driven by the drive motor 6. The water tank 2 is inclined substantially in the same direction as the outer side of the rotating drum 5, and the cross section in a direction perpendicular to the rotating shaft 7 is arranged substantially concentrically.
[0025]
Further, the rotary drum 5 has an opening 5a through which the laundry is taken in and out, and the whole peripheral wall is used for passing water for washing, draining for dehydration, warm air for drying, and the like. In addition, a large number of small holes 5b are provided. Further, a ring-shaped fluid balancer B is fixed around the outside of the opening 5a so that the rotating drum 5 maintains a stable rotation. The fluid balancer B may be provided inside the opening 5a. Further, T is a protrusion provided at a plurality of locations on the inner periphery of the rotating drum 5, thereby stirring the laundry. The laundry is not shown.
[0026]
Further, a door 8 for taking in and out the laundry is provided in front of the dry washing machine, and the water tank 2 is sealed by closing the door 8 and sandwiching the door packing 9 between the water tank 2. , Washing water and the like are not leaked outside the machine. Further, a detecting means (not shown) for detecting opening / closing of the door 8 and a locking means (not shown) for locking the door 8 during operation of the apparatus are attached in the vicinity of the door 8 of the outer box 1. Reference numeral 11 denotes a detergent case, which is not shown in detail, but has a detergent chamber and a finisher chamber, and is detachably provided on the front surface of the outer box 1.
[0027]
In the upper part of the outer box 1, water supply valves 12 and 13 are respectively provided where the water supply pipe A inserted from the rear part is branched, and the water supply valve 12 is connected to the detergent chamber of the detergent case 11 by a pipe 12a. The water supply valve 13 communicates with the finisher chamber of the detergent case 11 through a pipe 13a. Further, the water supply nozzle 14 communicates the detergent chamber and the finishing agent chamber of the detergent case 11 with the water tank 2. Water from the water supply pipe A is supplied into the rotary drum 5 from the water supply nozzle 14 through the detergent case 11 as shown by an arrow d and the like.
[0028]
Reference numeral 15 denotes a filter case, which has a built-in lint filter 16 that captures foreign matter and the like from the laundry, and is detachably provided on the lower front surface of the outer box 1. The lint filter 16 is formed in a lattice shape with fibers or resin, and is detachable from the filter case 15. The filter case 15 communicates with the lower part of the water tank 2 through the drain pipe 17 and further communicates with the water level sensor 18 through the pressure guiding pipe 19. Further, the filter case 15 communicates with the drain valve 20 through the drain pipe 21. The drain valve 20 communicates with the outside of the washing machine through a drain pipe 22. The drain valve 20 may be a drain pump.
[0029]
Reference numeral 23 denotes a circulation pump. The suction side is connected to the drain pipe 21, the discharge side is connected to the discharge pipe 24, and the discharge pipe 24 communicates with the upper part of the water tank 2. The discharge pipe 24 re-supplys the washing liquid and the rinsing liquid as circulating water, and circulates the circulating water once passed through the lint filter 16 as indicated by arrows a and b as indicated by arrow c. It is circulated by the pump 23 and circulated and supplied into the rotating drum 5 by this discharge pipe 24 as indicated by an arrow W.
[0030]
Such a drum-type drying washing machine is configured to perform washing, rinsing, dehydration, and drying continuously or independently for the laundry inside while rotating the rotary drum 5. In particular, in the drying process, as shown in FIG. 3, the air in the water tank 2 is circulated by the exhaust duct 53 that is connected to the upper part of the water tank 2 and is connected to the upper part, thereby drying the laundry. At this time, the hot air supply means 50 comprising the blower fan 51 and the heater 52 provided at the upper part in the exhaust duct 53 is operated, and the air in the water tank 2 circulates in the exhaust duct 53 in the direction indicated by the arrow f. Then, it is heated by the heater 52, and flows again into the water tank 2 and eventually into the rotating drum 5 by the blower fan 51. Then, moisture contained in the laundry is absorbed and circulated in the exhaust duct 53 again.
[0031]
Here, a sprinkler pipe 54a connected from the outside to the exhaust duct 53 is inserted at a position in front of the blower fan 51. By opening a water supply valve 54 provided in the middle of the sprinkler pipe 54a, the sprinkler pipe 54a is inserted into the exhaust duct 53 from here. Watered. The sprayed water contacts the warm air in the exhaust duct 53 to cool it, and moisture contained in the warm air is condensed to remove it. The cooled hot air is reheated by the heater 52 to become hot air of high temperature and low humidity, recirculated in the rotating drum 5, and again absorbs moisture contained in the laundry. In this way, the air in the water tank 2 is circulated while being heated and cooled, and the laundry is dried by repeating this.
[0032]
Further, in the present embodiment, the cleaning pipe 25 is branched from the middle of the discharge pipe 24, and this is connected to the position in front of the sprinkling pipe 54 a in the exhaust duct 53. Thus, a part of the circulating water is supplied into the exhaust duct. Details will be described later.
[0033]
FIG. 4 is a block diagram showing the configuration of the control system of the drum-type drying washing machine according to the present embodiment. As shown in the figure, the main part of the control circuit 100 surrounded by a broken line is a microcomputer 101 surrounded by an alternate long and short dash line, which includes a CPU 102, a RAM 103, a ROM 104, a timer 105, and a system bus 106. , And a plurality of I / O ports 107 surrounded by dotted lines. The microcomputer 101 operates when a constant voltage is supplied from the power supply circuit 108 in the control circuit 100 to the power supply terminals VDD and VSS, so that a signal can be input from the reset circuit 109 to the RESET terminal. It has become.
[0034]
Further, the CPU 102 includes a control unit 110 and a calculation unit 111. The control unit 110 retrieves and executes a command stored in the ROM 104, while the calculation unit 111 performs various input devices and the like based on a control signal given from the control unit 110 at the execution stage of the command. Operations such as binary addition, logical operation, increase / decrease, and comparison are performed on data input from the RAM 103. Therefore, the ROM 104 stores in advance means for operating various devices, conditions set for various determinations, rules for processing various information, and the like.
[0035]
The microcomputer 101 includes a plurality of I / Os from an input key circuit 112 connected to various operation switches (not shown) and a state detection circuit 113 connected to a water level sensor 18 and temperature sensors 55 and 56 (described later). A signal is input via the port 107, and calculation is performed based on the signal, and output control of the display device driving circuit 114, the buzzer driving circuit 115, and the load driving circuit 116 is performed.
[0036]
Here, the display device driving circuit 114 drives the display device provided in the operation / display unit 10 described above, and the buzzer driving circuit 115 is not shown when the key input is completed, when the operation is completed, and when an abnormality occurs. This is to sound a buzzer and tell the user to that effect. The load drive circuit 116 is connected to load sections such as a drain valve 20, a drive motor 6, water supply valves 12, 13, 54, and the like. These arrangements and functions are the same as those described in the prior art or the embodiment.
[0037]
Hereinafter, main control operations according to the present embodiment will be described. In the above-described configuration, when washing is performed, first, the door 8 is opened to put the laundry into the rotating drum 5, the detergent is put into the detergent chamber of the detergent case 11, the door 8 is closed, and the operation / display unit 10. Press the start button. Then, the rotating drum 5 rotates, and the rotation resistance is detected based on the current value of the driving motor 6, the rotation speed decreasing pattern when the inertia of the rotating drum 5 stops, and the cloth amount detection for determining the amount of laundry put in is performed. Done. Based on the cloth amount detection result, an operation course such as an operation time and an operation strength is determined.
[0038]
When the driving course is determined, the door 8 is locked by the locking means, and the washing process is started. In the washing step, the water supply valve 12 is opened, and the supplied water reaches the rotating drum 5 through the water supply nozzle 14 together with the detergent that has been put in the detergent chamber of the detergent case 11. Then, when water is supplied to a predetermined water level in the water tank 2, the water supply valve 12 is closed and the rotary drum 5 rotates at a low speed. The predetermined water level is detected by the water level sensor 18. This is to determine the water level by moving a magnetic body linked to the water pressure in the water tank 2 in a coil (not shown) of the water level sensor 18 and detecting the resulting inductance change in the coil as a change in oscillation frequency. is there.
[0039]
After rotating the rotating drum 5 at a low speed for a predetermined time, the washing process is terminated, the drain valve 20 is opened, and the washing liquid in the water tank 2 is drained to the outside. After this drainage is completed, the process proceeds to a rinsing process. In this rinsing step, the intermediate dehydration step and the reservoir rinsing step are alternately performed a plurality of times. First, in the intermediate dehydration step, the rotating drum 5 is rotated at a high speed, and the washing liquid contained in the laundry is dehydrated by the centrifugal force. At this time, the washing liquid is discharged to the periphery from a small hole 5 b provided in the peripheral wall of the rotary drum 5, is guided to the lower part of the water tank 2 through the inner wall, and is drained to the outside through the drain valve 20.
[0040]
Next, in the rinsing and rinsing step, the drain valve 20 is closed, the water supply valve 13 is opened, and the supplied water passes through a separate chamber that does not contain detergent in the detergent case 11 and passes through the water supply nozzle 14 and the rotating drum 5. Reach inside. When the water is supplied to a predetermined water level in the water tank 2, the water supply valve 13 is closed and the rotary drum 5 rotates at a low speed. After rotating the rotating drum 5 at a low speed for a predetermined time, the rinsing and rinsing process is terminated, the drain valve 20 is opened, and the washing liquid in the water tub 2 is drained to the outside. After this drainage is completed, the process proceeds to the finishing dehydration process. In this finishing dewatering step, the same operation as in the intermediate dewatering step is performed to dehydrate the laundry.
[0041]
After the finishing dehydration process, the process proceeds to the drying process. In the drying process, the hot air supply means 50 including the blower fan 51 and the heater 52 is activated, and the air in the water tank 2 and the rotary drum 5 circulates in the exhaust duct 53 in the direction indicated by the arrow f and is warmed by the heater 52. Then, the air flows again into the water tank 2 and eventually into the rotating drum 5 by the blower fan 51. Then, moisture contained in the laundry is absorbed and circulated in the exhaust duct 53 again.
[0042]
Here, a sprinkler pipe 54a connected from the outside to the exhaust duct 53 is inserted at a position in front of the blower fan 51. By opening the water supply valve 54 provided in the middle, the exhaust duct 53 is opened from here. Watered. The sprayed water contacts the warm air in the exhaust duct 53 to cool it, and moisture contained in the warm air is condensed to remove it. The cooled hot air is reheated by the heater 52, becomes hot air of high temperature and low humidity, is recirculated in the rotating drum 5, and absorbs the moisture of the laundry again. In this way, the air in the water tank 2 is circulated while being heated and cooled, and the laundry is dried by repeating this.
[0043]
Then, for example, the temperature of the hot air is detected by a temperature sensor, and when a predetermined temperature is detected, the drying process is terminated. Alternatively, the humidity of the hot air may be detected by a humidity sensor, and the drying process may be terminated when a predetermined humidity is detected. Or you may make it complete | finish after a predetermined time from a drying process start. The water condensed when the hot air is dehumidified descends in the exhaust duct 53, flows into the water tank 2 from the lower end thereof, and is drained through the drain pipes 17, 21, and 22.
[0044]
During this drying process, the rotating drum 5 is rotated in a drying rotation pattern. The drying rotation pattern is knitted with a combination of different rotation speeds, reversal periods, rest times, etc., so that the laundry in the rotating drum 5 rotates irregularly so that warm air uniformly contacts the laundry. It is made up of. Further, an exhaust temperature sensor 55 is provided on the exhaust side of the exhaust duct 53, and an intake temperature sensor 56 is provided on the intake side, and the hot air temperature is constantly or periodically monitored.
[0045]
Here, during the drying operation, the warm air circulation path, in particular, the exhaust duct 53 may be contaminated with foreign matter or foreign matter to inhibit the warm air circulation, or the blower fan 51 stops and the hot air stagnates. Then, the flow rate of the hot air changes, and the absolute value of the hot air temperature and the rate of temperature increase also change. Therefore, these are monitored by the exhaust temperature sensor 55 and the intake air temperature sensor 56, and when a predetermined temperature or a predetermined rate of temperature increase is detected by the state detection circuit 113, it is determined that the state is abnormal and the operation is stopped. And it is set as the structure which alert | reports abnormality to a user by displaying on the operation / display part 10, or generating the alarm sound by a buzzer.
[0046]
Further, when the abnormal state is detected, it is desirable to first shut off the heater 52 and cool the warm air until a preset safe temperature is detected, and then stop the full load. Further, the locking means of the door 8 is released after the warm air is cooled to a preset safe temperature and the full load is stopped. Thereby, a burn etc. can be prevented. In addition, after the abnormal state is detected and the drying operation is stopped, if the abnormal state is not resolved, the operation / display unit 10 instructs to start the drying process, and this is not performed. It has become.
[0047]
As a method for monitoring the hot air temperature, that is, when the circulating hot air stagnates, the hot air temperature in the vicinity of the heater 52 rises. Therefore, when the exhaust temperature sensor 55 provided in the vicinity of the heater 52 reaches a predetermined temperature. Judged as abnormal temperature. Alternatively, if the circulating hot air stagnates, the temperature difference between the exhaust temperature sensor 55 and the intake air temperature sensor 56 becomes large. If this temperature difference reaches a predetermined temperature difference, it is determined that the temperature is abnormal. Alternatively, if the circulating hot air stagnates, the temperature rise value per unit time of the exhaust temperature sensor 55 or the intake air temperature sensor 56, that is, the temperature rise rate increases, and when this rise rate value reaches a predetermined value, the abnormal temperature Judge.
[0048]
In the abnormal state as described above, the dust duct and other foreign matters from the laundry during the drying operation circulate in the circulation path together with the warm air, and the exhaust duct 53, the blower fan 51, the heater 52, and the water tank 2 , Often caused by accumulation on the rotating drum 5 or the like, particularly when only the drying process is repeated.
[0049]
Accordingly, a history such as the number of times the drying process is repeated and the drying operation time is accumulated is stored in the RAM 103, and when the history value reaches a preset value, the operation is stopped and displayed on the operation / display unit 10. Or an alarm sound is issued to notify the user of the abnormality. Alternatively, when the preset set value is reached during the drying operation, the operation stop processing may be performed after the process is completed. Again, when stopping the operation, it is desirable to first shut off the heater 52 and cool the warm air before stopping the full load.
[0050]
In addition, during the washing process and the rinsing process, the inside of the hot air path is washed. Therefore, the history value is cleared when these processes are operated, and the number of times the drying process is repeated and the drying operation time are set again from 0. Programmed to accumulate. Or it is good also as a structure which provides the tank washing | cleaning process which wash | cleans a water tank separately from a washing process and an rinsing process, and clears the said history value when this tank washing | cleaning process is drive | operated.
[0051]
This tank washing process is preferably different from the washing process and the rinsing process with respect to the water level of the water tank, the rotation chart of the rotating drum, and the operation time. Specifically, in view of the fact that a large amount of the above-mentioned contaminants are deposited in the portion below the water level during the washing step and the rinsing step, it is desirable to set the water level higher than the water level during these steps. In addition, it is desirable that the rotational speed of the rotating drum is higher than that in these steps, and the contaminants are discharged by centrifugal force.
[0052]
In addition, after detecting the set value and stopping the drying operation, if the operation for removing contaminants, that is, the washing process or the rinsing process, or the operation of the tank washing process is not performed, the operation / display unit 10 performs the drying process. The program is programmed not to do this even if it is instructed to start. The notification of the abnormal state is interrupted after a predetermined time, and is notified again when a power switch operation or a drying process instruction is performed again. In addition, depending on the user, there are cases where only items that do not contain impurities are dried, but in order to improve convenience at this time, a mode in which the drying process is operated even after the above set value is exceeded, and the aforementioned The operation / display unit 10 is provided with a key for selecting each mode.
[0053]
In addition, for example, after the set value is detected and a predetermined time has elapsed, the washing process, the rinsing process, or the washing process of the tank is operated, and the washing of the tank is automatically performed periodically. It is also possible to clear the stored integrated value of the number of times the drying process is repeated and the drying operation time. Here too, in order to improve the convenience of drying only those items that do not generate impurities, a mode that periodically operates the tank cleaning process and a mode that does not operate are provided, and the keys for selecting each mode are operated. -It is good also as a structure provided in the display part 10. FIG.
[0054]
When the opening / closing operation of the door 8 is detected by the detection means (not shown) for detecting the opening / closing of the door 8 after the set value is detected, for example, it is assumed that the laundry has been taken out, and then It may be configured to automatically operate any one of the washing, rinsing, and tank washing processes.
[0055]
Further, in the present embodiment, as shown mainly in FIG. 3, the cleaning pipe 25 is branched from the middle of the discharge pipe 24, and this is connected to a position in the exhaust duct 53 in front of the water spray pipe 54 a. Thereby, a part of the circulating water is branched as indicated by an arrow e and further supplied into the exhaust duct 53 as indicated by an arrow V. Thereby, the foreign matter adhering in the exhaust duct 53 can be washed away more effectively.
[0056]
Further, at the start of each of the washing and rinsing process, and further, the tank washing process, the water supply valve 54 is opened and water is supplied from the sprinkling pipe 54a to wash away impurities in the exhaust duct 53. At this time, at least the blower fan 51 of the hot air supply means 50 is operated intermittently to change the air volume, change the direction of discharge of the circulating water or feed water supplied into the exhaust duct 53, and the inside of the exhaust duct 53. It is configured to clean a wide range.
[0057]
It should be noted that the present invention is not limited to the embodiment described above, and changes and modifications can be freely made within the scope of the present invention. The circulation means in the claims corresponds to the discharge pipe connected to the circulation pump in the embodiment. The circulation path of the hot air is in the exhaust duct, the cleaning means is in the cleaning pipe, and the water supply means is water supply. It corresponds to the valve (54) and the watering pipe, respectively.
[0058]
【The invention's effect】
As described above, according to the present invention, there is provided a drum-type drying washing machine having a function of ensuring a warm air path during a drying process and preventing accidents particularly when repeated drying operations are performed. I can do it.
[0059]
In particular, when the hot air reaches a dangerous temperature, that is, a predetermined temperature set in advance due to clogging of foreign substances in the circulation path of the hot air or other causes, the laundry is stopped by notifying the abnormality, It can prevent shrinkage and discoloration due to high temperatures, and accidents such as fires, and can prompt the user to respond.
[0060]
Also, when the drying process is repeated, when the number of drying operations or the drying operation time reaches a preset value, the operation is stopped or an abnormality is notified, so that the hot air circulation path is entered. Prevents overheating when foreign matter is accumulated, prevents shrinkage and discoloration due to high temperature of the laundry, and accidents such as fire, etc., and prompts the user to clean the circulation path Can do.
[0061]
When stopping the operation, only the heat supply means such as the heater is stopped first, and after cooling for a predetermined time or until the warm air reaches a predetermined temperature, the entire load is stopped. Therefore, it is possible to provide a drum-type washing machine with high safety.
[0062]
In addition, a drum drying washing machine with high safety can be provided by adopting a configuration in which a new drying operation is not performed unless an abnormal state such as the temperature of the hot air or the drying operation time is resolved.
[0063]
Also, when washing operation or rinsing operation or tank cleaning operation is performed, the stored dry operation count or accumulated value of the drying operation time is reset, and further, washing operation or rinsing operation is automatically performed periodically. Alternatively, a drum-type drying washing machine that is safe and highly convenient can be provided by adopting a configuration in which the tank washing operation is performed.
[0064]
Also provided is a circulating means for recirculating water discharged from the water tank as circulating water to the water tank, branching from the circulating means, and supplying a part of the circulating water to the hot air circulation path for cleaning. Or a configuration in which water supply means for supplying water to the hot air circulation path is provided, and further, a configuration in which the hot air supply means is operated intermittently ensures a reliable and effective hot air circulation path. Can be cleaned.
[Brief description of the drawings]
FIG. 1 is a perspective view showing the external appearance of a drum-type drying washing machine according to the present invention.
FIG. 2 is a side longitudinal sectional view schematically showing an example of a drum-type drying washing machine of the present invention.
FIG. 3 is a front longitudinal sectional view schematically showing an example of the drum-type drying washing machine of the present invention.
FIG. 4 is a block diagram showing a configuration of a control system of the drum-type drying washing machine according to the present embodiment.
FIG. 5 is a side longitudinal sectional view schematically showing an example of a conventional drum-type drying washing machine.
FIG. 6 is a front longitudinal sectional view schematically showing an example of a conventional drum-type drying washing machine.
[Explanation of symbols]
1 Outer box
2 Aquarium
3 Spring
4 shock absorbers
5 Rotating drum
6 Drive motor
7 Rotating shaft
8 Door
9 Door packing
10 Operation / display section
11 Detergent case
12, 13 Water supply valve
14 Water supply nozzle
15 Filter case
16 Waste thread filter
17 Drain pipe
18 Water level sensor
19 Pressure guiding pipe
20 Drain valve
21, 22 Drain pipe
23 Circulation pump
24 Discharge pipe
25 Washing tube
50 Hot air supply means
51 Blower fan
52 Heater
53 Exhaust duct
54 Water supply valve
54a Watering pipe
55 Exhaust temperature sensor
56 Intake air temperature sensor
100 Control circuit
101 Microcomputer
102 CPU
103 RAM
104 ROM
105 timer
106 System bus
107 I / O port
108 Power supply circuit
109 Reset circuit
110 Control unit
111 Calculation unit
112 Input key circuit
113 State detection circuit
114 Display Device Driving Circuit
115 Buzzer drive circuit
116 Load drive circuit

Claims (9)

A tank,
A rotating drum rotatably disposed in the water tank;
A hot air supply means provided in a circulation path for circulating the air in the water tub, for supplying hot air for drying laundry stored in the rotating drum;
Storage means for storing a history of drying operation;
A history of the drying operation is stored by the storage means, and when a predetermined history value is reached, an operation stop or abnormality notification is given as an abnormal state in which foreign matter from the laundry is accumulated in the circulation path of hot air. Control means to perform;
A door for putting laundry into and out of the rotating drum;
Open / close detecting means for detecting the open / closed state of the door,
A drum-type dry laundry , wherein after the abnormal state is detected, when the opening / closing operation of the door is detected by the opening / closing detection means, either a washing operation, a rinsing operation or a tank washing operation is performed . And resupplying circulation means to the water tank as circulating water of water discharged from the tub,
The drum-type drying washing machine according to claim 1, further comprising a cleaning unit that branches from the circulation unit and supplies a part of the circulating water to a circulation path of hot air for cleaning. The drum-type drying washing machine according to claim 1 , further comprising a water supply means for supplying water to the hot air circulation path. The drum type dry washing machine according to any one of claims 1 to 3, wherein the hot air supply means includes a blower fan and a heater. The drum type dry washing machine according to any one of claims 1 to 4, wherein the operation stop is performed after the warm air is cooled. The drum-type drying washing machine according to any one of claims 1 to 5, wherein the drying operation is not started unless the abnormal state is resolved. The drum-type dry washing machine according to any one of claims 1 to 6, wherein any one of a washing operation, a rinsing operation, and a tank washing operation is periodically performed. The drum according to any one of claims 1 to 7, wherein when the washing operation, the rinsing operation, or the tank washing operation is performed, the value accumulated and stored by the storage means is reset. Dry washing machine. The drum type dry washing machine according to any one of claims 1 to 8, wherein the hot air supply means is operated intermittently.

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