JP2016036424A - Washing and drying machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem in which, in an exhaust operation, new air (outside air) is supplied constantly and humidity in a tub drops rapidly, drying of a surface of clothes proceeds before wrinkles of the clothes are stretched completely, so that finishing of the clothes deteriorates.SOLUTION: A washing and drying machine includes: an outer tub 20 in which the inside becomes a drying chamber during drying time; a rotary drum 29 arranged rotatably in the outer tub 20 and for accommodating laundry 30; a motor 36 for driving the rotary drum 29; and a drying device 6 including air blowing passages 5, 20 which circulate via the outer tub 20, a blower device 61 for flowing air to the air blowing passages 5, 20, and a heating device 62 for heating the air flowing in the air blowing passages 5, 20. It also has a suction device 13 for sucking outside air into the air blowing passages 5, 20, from the outside of the air blowing passages 5, 20. An amount of air sucked from the suction device 13 from the outside of the air blowing passages 5, 20 during a drying operation is adjusted so as to become smaller than the amount of air circulating in the air blowing passages 5, 20.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a washing and drying machine provided with means for drying clothes.

  Drying of clothes by a washing / drying machine capable of continuously performing from washing to drying is performed by creating high-temperature and low-humidity air with a heat source and blowing the air into a washing tub with a blower fan. High temperature and low humidity air raises the temperature of the garment and evaporates moisture from the garment. The evaporated water is discharged out of the machine. As a conventional technique related to this, a washing / drying machine described in JP 2011-72673 A (Patent Document 1) is known.

  There are two methods for removing the evaporated water: an exhaust system that discharges it to the outside of the washing and drying machine (always supplying new air) and a dehumidification system that cools the evaporated water to condense and removes the water (circulates the same air). is there. In addition, air cooling or water cooling dehumidification is performed in the first half of the drying process in order to reduce time and reduce the amount of water used and power consumption. There is a method of exhausting as it is.

  In the washing / drying machine of Patent Document 1, all or part of the air discharged from the outer tub is exhausted through the drain hose during the drying operation. At that time, the temperature of the discharged air discharged to the rotating drum is controlled to a predetermined temperature by adjusting the opening of the intake valve to adjust the amount of outside air taken in and the amount of warm air circulated (see summary). For this purpose, at the initial stage of the drying process, the intake valve opening is narrowed from 100% to about 80% in steps, the amount of outside air taken in is reduced, and the amount of hot air circulated is increased from 0%. (See FIG. 15 of Patent Document 1).

  As for the finish of the clothes after drying, it is known that the finish of the clothes improves as the wind speed and air volume of the warm air during drying increase.

JP 2011-72673 A

  With the conventional technology that exhausts hot air after spraying on the laundry as it is, it can save time and reduce the amount of water used and power consumption, but since new air (external air) is always supplied, the tank The humidity inside falls rapidly. When the humidity in the tank is drastically reduced, the clothing surface may be dried before the clothing wrinkles are fully stretched, and the finish of the clothing may deteriorate.

  On the other hand, by reducing the rotation speed of the blower fan and reducing the amount of external air that is blown (exhausted), it is possible to prevent a decrease in the humidity in the tank. However, if the rotational speed of the blower fan is kept low, the wind speed and the air volume for extending the wrinkles of the clothing will be insufficient, leading to deterioration of the clothing finish. In addition, the drying operation takes a long time.

  Therefore, an object of the present invention is to provide a washing / drying machine capable of keeping the inside of a tank at high humidity and maintaining the air velocity and the air volume of warm air for stretching wrinkles of clothes during drying. .

  An outer tub that becomes a drying chamber when drying, a rotating drum that is rotatably arranged in the outer tub, stores laundry, a motor that drives the rotating drum, and blows warm air to the rotating drum A drying device including an air passage, a heating unit and an air blowing device, an intake device for sucking air outside the outer tub and the air passage, and a drain hose for discharging water discharged from the outer tub In the washing and drying machine in which air is circulated through the drying device and the outer tub by the air blower during drying, the amount of air discharged from the drying device and the outer tub to the outside of the machine during the drying operation Decrease with the passage of time, and increase the amount of air circulating through the drying device and the outer tub with the passage of time.

  According to the present invention, during the drying operation, the amount of air discharged to the outside of the washing / drying machine is reduced, and the amount of circulating air is increased, so that the warm air blown into the rotating drum to stretch the wrinkles of the clothes The drying operation can be performed while ensuring the wind speed and air volume.

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

1 is a perspective view of a washing / drying machine according to a first embodiment of the present invention. It is sectional drawing of the washing-drying machine at the time of the warm air circulation in the first half of a drying process which concerns on 1st Example of this invention. It is a block diagram which shows the electric constitution of the washing / drying machine which concerns on 1st Example of this invention. It is a figure which shows the operation state of the heater of a drying process which concerns on 1st Example of this invention, a cooling water valve, and an intake valve, and the state (exhaust / circulation) of an air flow. It is a sectional view of a washing drier at the time of exhaust operation in the first half of a drying process concerning a 1st example of the present invention. FIG. 4 is a cross-sectional view of the washing / drying machine according to the first embodiment of the present invention during partial exhaust operation in the middle stage of the drying process. It is sectional drawing of the washing-drying machine which concerns on 1st Example of this invention at the time of completion | finish of a drying process. It is a figure which shows the operation state of the heater of a drying process which concerns on 2nd Example of this invention, a cooling water valve, and an intake valve, and the state (exhaust / circulation) of an air flow. It is a figure which shows the operating state of the heater of a drying process which concerns on 3rd Example of this invention, a cooling water valve, and an intake valve, and the state (exhaust / circulation) of an air flow. It is sectional drawing of the washing-drying machine at the time of the water-cooling dehumidification operation | movement in the latter half of a drying process which concerns on the 3rd Example of this invention. It is a figure which shows the operation state of the heater of a drying process which concerns on 4th Example of this invention, a cooling water valve, and an intake valve, and the state (exhaust / circulation) of an air flow. It is a figure which shows the change of the opening degree of the intake valve 13 in a 2nd Example. It is a figure which shows the change of the opening degree of the intake valve 13 in a 4th Example.

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

  In FIG. 1, the perspective view of one Example which concerns on the washing-drying machine of this invention is shown. The laundry dryer of this embodiment is a drum type laundry dryer. On the upper part of the base 1, an outer frame (housing) 2 composed of a steel plate and a resin molded product is placed. A door 3 and a front cover 22 for taking in and out the laundry 30 are provided on the front surface of the outer frame 2, and a back cover 23 is provided on the back surface. An operation panel 106, a power-on button (power-on switch) 139a, and a power-off button (power-off switch) 139b are provided above the front cover 22. On the operation panel 106, in addition to a start button (start switch) 112 for starting a washing process and a drying process, a display 114, a light emitting diode 113, and a buzzer 115 (not shown) for notifying the user of the operation state of the washing / drying machine. 3) and the like.

  In FIG. 2, sectional drawing (longitudinal sectional drawing) of one Example which concerns on the washing-drying machine of this invention is shown. FIG. 2 shows a state during hot air circulation in the first half of the drying process. An outer tub 20 is provided inside the outer frame 2. The outer tub 20 is supported by a plurality of lower suspensions 21. A rotating drum 29 configured to be rotatable is provided inside the outer tub 20. Inside the rotating drum 29, the door 3 is opened and the laundry 30 is put in. A fluid balancer 31 is provided on the outer periphery of the opening of the rotary drum 29 to reduce vibration due to unbalance of the laundry 30 during dehydration. A plurality of lifters 33 for lifting the laundry 30 are provided on the inner side (inner peripheral wall) of the rotary drum 29. The rotating drum 29 is provided with a rotating drum metal flange 34 on the bottom surface (the surface facing the opening of the rotating drum 29). The rotating drum 29 is directly connected to a drum driving motor 36 via a main shaft 35 connected to a rotating drum metal flange 34. A rubber packing 38 made of an elastic body is attached to the opening of the outer tub 20. The packing 38 maintains the water tightness between the outer tub 20 and the door 3. The packing 38 prevents water leakage during washing, rinsing and dehydration. The rotating drum 29 has a large number of small holes (not shown) for centrifugal dehydration and ventilation on the side wall (inner peripheral wall). A drain port 37 opened in the bottom wall of the outer tub 20 is connected to the drain hose 9 via the drain valve 8.

  The drying device 6 including the dehumidifying duct 5 for drying the laundry 30 in the rotating drum 29, the fan 61 serving as a blowing means (blower device), and the heater 62 serving as a heating means (heating device) is separated from the outer tub 20 and separated from the outer frame 2. (Not shown). The dehumidifying duct 5 and the vent 32 are connected approximately horizontally by a flexible bellows 4, and the flexible bellows 7 is approximately vertical between the outlet of the heater 62 and the blow-out nozzle 11 connected to the front upper portion of the outer tub 20. The vibration of the outer tub 20 is absorbed by connecting in the direction. A temperature sensor 155 for detecting the water temperature is provided in the vicinity of the drain outlet 37, and a temperature sensor 154 for detecting the room temperature is provided in the lower part of the housing. A temperature sensor 152 is provided at the intake port of the fan 61, and a temperature sensor 153 is provided at the discharge port of the fan 61.

  FIG. 3 is a block diagram showing an electrical configuration according to an embodiment of the washing and drying machine of the present invention. The control device 138 is composed of a microcomputer. The commercial power source is connected to the transformer 120 via the power switch 139. The power switch 139 is provided on the back side of the power on button 139a and the power off button 139b (see FIG. 1) for operating the power source. The transformer 120 is connected to a commercial power source by operating the power on button 139a, and the power off button 139b is operated. To disconnect the transformer 120 from the commercial power source. The secondary side of the transformer 120 is connected to the power supply circuit 121. The transformer 120 and the power supply circuit 121 convert the commercial power supply voltage into the drive voltage VCC of the microcomputer 138. The voltage output from the power supply circuit 121 is input to the VCC terminal of the microcomputer. Further, a drive circuit 50d, a drive circuit 53d, a drive circuit 8d, a drive circuit 36d, a drive circuit 61md, a drive circuit 62d, and a drive circuit 13md, which will be described later, are connected to the primary side of the transformer 120 and are supplied with power.

  The control device 138 is connected to the operation button input circuit 103, the water level sensor 104, and the temperature sensors 152, 153, 154, and 155 connected to the switches 102a and 102b. Receive various information signals.

  Further, the control device 138 includes a water supply valve (electromagnetic valve) 50, a cooling water valve (electromagnetic valve) 53, a drain valve (electromagnetic valve) 8, a drum driving motor 36, a fan driving motor 61m, a heater 62, and an intake valve driving. The operation of the motor 13m is controlled. For this purpose, the control device 138 includes a drive circuit 50d for the water supply valve (electromagnetic valve) 50, a drive circuit 53d for the cooling water valve (electromagnetic valve) 53, a drive circuit 8d for the drain valve (electromagnetic valve) 8, and a drum driving motor. 36, a drive circuit 61md for the fan drive motor 61m, a drive circuit 62d for the heater 62, and a drive circuit 13md for the intake valve drive motor 13m.

  The control device 138 is connected to a display 114, a light emitting diode 113, and a buzzer 115 for notifying the user of the operation state of the drum type washing and drying machine S.

  The drum type washing and drying machine configured as described above puts laundry into the rotating drum 29 and operates the power button 139 (see FIG. 8) (presses the power on button 139a (see FIG. 1)), The course setting for washing, drying, or washing and drying can be performed from the operation panel 106. When the start button 112 is operated after the course setting or the like is performed, a washing, drying, or washing and drying course is appropriately performed.

  In the washing process, the water supply valve 50 is opened with the drain valve 8 closed, the water is supplied to the outer tub 20 to collect the washing water, and the laundry 30 is washed by rotating the rotary drum 29. Further, in the dehydration step, the drain valve 8 is opened to drain the washing water in the outer tub 20, and the rotary drum 29 is rotated to perform centrifugal dehydration.

  FIG. 4 shows the operating states of the heater 62, the cooling water valve 53 and the intake valve 13 and the air flow for one embodiment relating to the drying process of the washing and drying machine of the present invention.

  As shown in FIG. 4, the drying process of the present embodiment is divided into four sections (periods) of the first half, the middle stage, the second half, and the end. When the operation is different in each section, the first half A, the first half B, the second half A, and the second half B are divided. In addition, a drying process may be called drying operation.

  In the first half A of the drying process, the rotary drum driving motor 36 is driven to rotate the rotary drum 29, and the fan driving motor 61m (see FIG. 3) is driven to operate the fan 61. With the operation of the fan 61, as shown in FIG. 2, the air in the outer tub 20 is sucked out from the air vent 32, passed through the dehumidifying duct 5, and sent to the heater 62. Air heated by the heater 62 is blown from the blow nozzle 11 toward the laundry 30 in the rotary drum 29. Thereby, the circulating air 12 that circulates through the outer tub 20, the dehumidifying duct 5, the fan 61, and the heater 62 is generated. The first half A corresponds to a preheating period during the drying process, and is intended to heat clothing. For this reason, as shown in FIG. 4, the heater 62 is ON, the cooling water valve 53 (see FIG. 3) is OFF, and the opening degree of the intake valve 13 is 0%. Since the opening degree of the intake valve 13 is 0%, the first half A is a state in which the same air is circulating in the washing / drying machine. For this reason, in FIG. 4, the air flow is indicated as “circulation”. When the clothes are sufficiently heated and the evaporation of moisture proceeds, the outer tub 20 and the air circulation path are filled with moist air. FIG. 2 shows a state of the first half A in which the opening degree of the intake valve 13 is 0%.

  The first half B of the drying process is an operation section for enabling the moist air to be exhausted out of the laundry dryer. As a method for discharging wet air to the outside of the washing and drying machine, there are a method for discharging it into the room as it is, a method for discharging it into the drainage groove through the drainage hose 9, and a method for discharging it to the outside (outdoors) by providing a dedicated pipe. It is done. In the present embodiment, a method of discharging through the drainage hose 9 is used. In the first half B, the heater 62 is ON, the cooling water valve 53 is OFF, and the opening degree of the intake valve 13 is 100%. When the opening degree of the intake valve 13 is 100%, the air circulation path is closed by the intake valve 13. For this reason, in the first half B, the air discharged from the outer tub 20 is discharged out of the washing and drying machine, and new air sucked from the intake valve 13 is sent into the outer tub 20. Details will be described below.

  In the first half B of the drying step, the operation of breaking the water seal in the drain trap 10 is performed in order to make the wet air exhaustable to the outside of the washing dryer. In the case of a general drain trap, since the water seal height is about 50 to 80 mm, the pressure on the drain hose 9 side is required to be about 1000 Pa or more to break the water seal.

  FIG. 5 is a sectional view showing the state of the washing / drying machine in the first half B of the drying process. In the first half B, the fan driving motor 61m (see FIG. 3) is driven to open the intake valve 13 as the intake means, and the fan 61 is driven. Thereby, the external air 16 can be sucked through the intake valve 13. At the same time, air corresponding to the amount sucked through the intake valve 13 is discharged from the drain hose 9 as exhaust air 72.

  At this time, the intake valve 13 has an opening degree of 100% as shown in FIG. This is a state in which the circulation path is completely blocked by the intake valve 13, and the air in the circulation path including the outer tub 20 can be exhausted from the drainage hose 9 as much as the external air 16 is sucked. In this state, since the amount of circulating air is zero, the flow of air is indicated as “exhaust” in FIG. The external air 16 is air outside the circulation path (circulation flow path) that circulates through the outer tub 20, the dehumidification duct 5, the fan 61, and the heater 62.

  When the opening degree of the intake valve 13 is set to 100%, the pressure on the drain hose 9 side can be increased most, and the water seal of a general drain trap can be broken.

  By sucking the external air 16, the wet air in the outer tub 20 and the circulation path can be discharged from the drain port 37 through the drain hose 9 to break the water seal of the drain trap 10 to the drain port 39. Become.

  When the external air 16 is sucked in, the external air 16 is sucked from the lower part of the main body due to the structure of the washing / drying machine, and is sucked in as air inside the casing 15 at the upper part of the main body. At this time, the external air 16 can collect and suck the exhaust heat generated from the outer tub 20, the motor 36, the fan 61 and the like during the operation of the washing / drying machine (washing, dehydration, and drying), thereby saving power. Can contribute.

  In the first half B of the drying process, when the wet air can be discharged (a state where the water trap of the drain trap is broken), the process proceeds to the middle stage A of the drying process. In the middle stage A of the drying process, the opening degree of the intake valve 13 is changed and set to 58%. In the first half B, the heater 62 is ON and the cooling water valve 53 is OFF. Details will be described below.

  FIG. 6 is a sectional view showing the state of the washing / drying machine in the middle section A of the drying process. As shown in FIG. 6, the circulation path is not completely cut off, and part of the wet air becomes the circulation air 12 and part is exhausted as the exhaust air 72. For this reason, in FIG. 4, the air flow is indicated as “partial exhaust”. The middle part A of the drying process corresponds to a constant rate drying period in the drying process.

  If the opening degree of the intake valve 13 remains 100%, the amount of air exhausted from the drainage hose 9 (sucked from the outside) is large, the humidity in the outer tub 20 is drastically reduced, and the garment wrinkle is stretched with warm air. The clothes surface will dry out and the finish will deteriorate. Further, when the exhaust air 72 is discharged, the vehicle is operated with noise.

  When the intake valve 13 has an opening degree of 58%, part of the moist air circulates, so the air in the outer tub 20 can be kept at a relatively high humidity, and the warm air can stretch the wrinkles of the clothes. it can. If the opening degree of the intake valve 13 is set too high, the amount of exhausted wet air will increase too much, leading to a rapid drop in the humidity in the tank. In this case, drying of the garment proceeds fast, but there is a problem that the surface of the garment dries before wrinkles of the garment are fully stretched and wrinkles remain. Therefore, in this embodiment, the opening degree of the intake valve 13 is set to 58% to prevent rapid drying of the clothing surface.

  In the present embodiment, most of the drying process is performed by a partial exhaust operation in which a part of the warm air is exhausted by the intake valve 13. That is, the middle board A is in an operating state in which clothes are dried such that part of the warm air becomes the circulating air 12 and the rest is discharged as exhaust air 72 to the outside of the apparatus.

The number of rotations of the fan 61 is set to a number of rotations capable of obtaining a wind speed and an air volume necessary for stretching the wrinkles of clothes, and is preferably set to 10000 to 15000 rpm. In this embodiment, the speed is 13400 rpm. Moreover, it is preferable that the wind speed of the warm air which blows on clothing from the blowing nozzle 11 shall be 60-100 m / s, and an air volume shall be 1.0-1.7 m < ³ > / min. In this embodiment, the wind speed of the warm air is about 85 m / s, and the air volume is about 1.4 m ³ / min. With such a setting, a sufficient wind force can be generated to stretch the wrinkles of the clothes. The wind speed and volume of warm air are better, but it is desirable to set them appropriately in consideration of noise during drying operation.

  Further, the fan 61 needs to ensure a high pressure (pressure higher than a predetermined pressure) even after the water seal is broken in order to suppress the odor from the drain outlet 39, and maintains a high pressure during the exhaust-type drying by the drain hose. Need to be controlled.

  The middle stage B of the drying process is a stage where the drying of the clothing has progressed and the amount of water to be evaporated is decreasing. In order to maintain the humidity in the outer tub 20, the opening degree of the intake valve 13 is narrower than that in the middle stage A of the drying process. The opening at this time is 48%. This is a state in which the air volume of the exhaust air 72 is smaller than that in the middle stage A of the drying process and the air volume of the circulating air volume 12 is large.

  The intake valve 13 is configured such that the cross-sectional area of the air passage changes depending on the opening degree. This air passage has an exhaust port for exhausting the air flowing through the air passage to the outside. In this embodiment, the exhaust port is constituted by a drainage device including a drainage port 37, a drainage valve 8 and a drainage hose 9. During the drying operation, by adjusting the opening of the intake valve 13 within a range in which the cross-sectional area of the air passage becomes larger than the cross-sectional area of the exhaust port, the air passage is made to flow more than the air flowing to the exhaust port (exhaust air 72). The flowing air (circulated air 12) is increased. Since an amount of air equal to the exhaust air 72 is sucked from the intake valve 13, in this case, the circulating air 12 becomes larger than the air sucked from the intake valve 13. The air passage through which the air circulates is configured by the outer tub 20, the vent 32, the bellows 4, the dehumidifying duct 5, the drying device 6 (fan 61, heater 62) bellows 7, and the blowout nozzle 11.

  The first half A, the first half B, the middle board A, and the middle board B are managed by time, and when a predetermined time elapses, the process proceeds to the next stage.

  In the latter half of the drying process, the clothes are further dried, the amount of water evaporated further decreases, and the temperature of the clothes starts to rise. This corresponds to a decreasing rate drying period in the drying process. In order to maintain the humidity in the outer tub 20, the opening degree of the intake valve 13 is narrower than that in the middle stage B of the drying process. The opening at this time is 38%. This is a state in which the air volume of the exhaust air 72 is smaller than that in the middle stage B of the drying process, and the air volume of the circulating air volume 12 is large. Drying is performed until the clothing is confirmed to be dry from the value of the internal temperature sensor.

  Specifically, the dryness of the clothes is determined based on the temperature difference between the first temperature detected by temperature sensor 152 and the second temperature detected by temperature sensor 154. When the temperature difference between the first temperature and the second temperature is equal to or greater than the predetermined temperature difference, the second half A of the drying process is terminated and the process proceeds to the end section of the drying process.

  FIG. 6 is a sectional view showing the state of the washing / drying machine in the end section of the drying process. As shown in FIGS. 4 and 7, in the end section of the drying process, the opening degree of the intake valve 13 is 58%. Since the opening degree of the intake valve 13 is 58%, external air 15 and 16 is introduced from the intake valve 13 at the initial stage of the end section. Further, as shown in FIG. 4, the heater 62 is in an OFF state. In this state, while keeping the pressure on the drain hose 9 side higher than the pressure on the drain port 39 side, the rotational speed of the fan 61 is lowered to a pressure level that does not break the water seal, and the temperature of the clothing is lowered to a predetermined value. The cooling water valve 53 is turned ON to both cool the inside and recover the water seal of the drain trap 10, and supply the cooling water 52 from the cooling water supply pipe 51. A part of the air continues to be exhausted until the water sealing of the drain trap 10 is completed. However, when the water sealing of the drain trap 10 is completed, only the circulating air 12 flows to the outer tub 20.

  That is, although the opening degree of the intake valve 13 is maintained at 58%, the exhaust air cannot be exhausted due to the water trapping of the drain trap 10, so the external air 15 and 16 from the intake valve 13 is not sucked and circulates in the circulation flow path. Only air 12 circulates. The end section is managed by time. When a predetermined time elapses, each operation is completed and the operation is ended.

  At the end of the drying process, water is supplied to the drainage port 39 via the drainage hose 9 while maintaining the pressure on the drainage hose 9 side at a predetermined level or more, so that the water in the drainage trap 10 is suppressed while suppressing odor from the drainage port 39. The seal can be restored.

  The water seal recovery of the drain trap 10 may be performed at the end of the drying operation or after the drying operation is finished as long as the pressure on the drain hose 9 side is kept high. After the end of the drying operation is a state in which the clothing has finished cooling and the clothing can be taken out.

  Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 8 shows the operating states of the heater 62, the cooling water valve 53 and the intake valve 13 and the air flow for one embodiment relating to the drying process of the washing and drying machine of the present invention. In this embodiment, a middle board IA is provided between the first half B and the middle board A in the first embodiment. The first half section (first half A, first half B), middle section (middle board A, middle board B), second half section and end section of the drying process are the same as those in the first embodiment.

  In the middle stage IA of the drying process, the opening degree of the intake valve 13 is 38%. At this time, the reference temperature for drying operation control is measured.

  The reference temperature indicates the value of each temperature sensor when the clothing temperature is stable during the constant rate drying period during drying.

  In the decreasing rate drying period, moisture evaporated from the clothing surface decreases and the clothing temperature rises, and the values 152, 153, and 154 of the temperature sensors also become higher than the reference temperature. The drying operation is controlled based on the change of each temperature sensor 152, 154, the elapsed time, and the like.

  When the opening degree of the intake valve 13 is changed, the ratio of the warm air exhaust air 72 and the circulating air 12 changes, so the amount of heat remaining in the outer tub 20 and the clothing also changes. When the opening degree of the intake valve 13 is narrow, the air volume of the warm air circulating air 12 increases, so that the amount of heat remaining in the outer tub 20 and the clothes increases, and the reference temperature also becomes a high value. On the contrary, when the opening degree of the intake valve 13 is wide, the air volume of the warm air exhaust air 72 increases, so the amount of heat remaining in the outer tub 20 decreases and the reference temperature also becomes a low value.

  When the opening degree of the intake valve 13 is changed during the drying operation, the temperature of the outer tub 20 and the clothing changes, and the values of the temperature sensors 152, 153, and 154 also change. Since the drying operation is controlled based on the values of the temperature sensors 152 and 154 and the elapsed time, when the opening of the intake valve 13 is narrowed, the internal temperature rises even if the clothes are not dry. There is a risk that the clothes will be considered dry.

  When the opening degree of the intake valve 13 is changed during the drying operation, the above-described phenomenon occurs, so that the opening degree of the intake valve 13 when measuring the reference temperature and the drying of clothes in the latter half of the drying process are checked. It is desirable that the intake valves 13 have the same opening degree.

  In FIG. 8, by controlling the opening degree of the intake valve 13 in the second half section for confirming the drying of the clothing to the middle platen IA for measuring the reference temperature, the drying operation is controlled without erroneous detection. Is possible.

  In the middle stage A of the drying process, the opening degree of the intake valve 13 is increased to 58%. At the opening degree of 38% and the opening degree of 58%, the drying degree of clothes is faster because the opening degree of 58% has higher drying efficiency. The operation state in the middle board A of this embodiment is the same as that in the middle board A of the first embodiment.

  Considering only the drying time (speed) of clothes, the intake valve 13 should have a wide opening. If the opening degree of the intake valve 13 is widened, the air volume of the warm air exhaust air 72 increases, and more moist air can be discharged.

  However, if the opening degree of the intake valve 13 is set too wide, the moisture evaporates from the clothing, and the moist air is discharged earlier than the humidity inside the outer tub 20 becomes high. Drying operation is performed while the humidity of the water drops. Although drying of clothing proceeds quickly, there is a problem that the surface of the clothing dries before the wrinkles of the clothing are fully stretched and wrinkles remain. Therefore, in this embodiment, the opening degree of the intake valve 13 is set to 58%.

  The middle stage B of the drying process is a stage where the drying of the clothing has progressed and the amount of water to be evaporated is decreasing. In order to maintain the humidity in the outer tub 20, the opening degree of the intake valve 13 is narrower than that in the middle stage A of the drying process. The opening at this time is 48%. This is a state in which the air volume of the exhaust air 72 is smaller than that in the middle stage A of the drying process and the air volume of the circulating air volume 12 is large. The operation state in the middle board B of this embodiment is the same as that of the middle board B of the first embodiment.

  In the latter half of the drying process, the clothes are further dried, the amount of water evaporated further decreases, and the temperature of the clothes starts to rise. In order to maintain the humidity in the outer tub 20, the opening degree of the intake valve 13 is narrower than that in the middle stage B of the drying process. The opening degree at this time is 38%, and the opening degree of the intake valve 13 is the same as that of the middle stage IA of the drying process (38%). The drying operation is performed until the drying of the clothes can be confirmed from the values of the internal temperature sensors 152 and 154.

  After confirming that the clothes are dry, move to the end section. The operation state and operation details of the end section of this embodiment are the same as those of the first embodiment.

  Next, a third embodiment of the present invention will be described with reference to FIG. The first half A, the first half B, the middle board A, the middle board B, and the second half A of the drying process are the same operations as the first half A, the first half B, the middle board A, the middle board B, and the second half of the first embodiment. The second half A of the present embodiment is the same operation as the second half section of the first embodiment.

  In the third embodiment, the latter half B is added after the latter half section of the first embodiment (the latter half A of the present embodiment). In the second half B, the opening degree of the intake valve 13 is set to 0%, the cooling water valve 53 is turned on instead of not performing the exhaust operation, the cooling water 52 is caused to flow from the cooling water supply pipe 51 to the dehumidification duct 5, and the water cooling dehumidification is performed. Do the driving.

  In the water-cooled dehumidifying operation, when warm air deprived of moisture (wet air) passes through the interior of the dehumidifying duct 5, it exchanges heat with the cooling water 52 to condense the moisture contained in the warm air. The operation is to dehumidify. The flow of warm air and wet air and the flow of cooling water 52 are shown in FIG. The cooling water 52 exchanges heat with warm air (wet air), then flows on the surface of the temperature sensor 155 and is drained. In the water-cooled dehumidifying operation, the drying operation is performed until the drying of the clothes can be confirmed from the values of the temperature sensors 152 and 155.

  When the operation is performed with the opening degree of the intake valve 13 changed, particularly when the operation is performed with the opening degree being narrowed, the pressure on the drainage hose 9 side is reduced by reducing the air volume of the exhaust air 72 of the moist air. During normal partial exhaust operation, since the water seal of the drain trap 10 is broken, no problem occurs even if the pressure on the drain hose 9 side decreases. However, depending on the state of the living environment, the pressure on the drain trap side may increase or the drain trap 10 may be sealed again.

  In the above state, the wet air cannot be discharged, so that the drying of the clothes does not proceed. Further, since the wet air cannot be discharged, all the warm air becomes the circulating air 12, the temperature of the outer tub 20 and the clothing rises, and the values of the temperature sensors 152, 153, and 154 rise and the clothing is dried. There is a risk of being regarded.

  Since it is difficult to grasp the state of the living environment, the process proceeds to the latter half B of the drying process when the partial exhaust operation is completed. In the second half B, the control is switched to the water-cooled dehumidifying operation and the dry state of the clothes is confirmed again.

  In the second half B, after drying of the clothes is confirmed, the process proceeds to the end section. The operation state and operation details of the end section of this embodiment are the same as those of the first embodiment.

  Next, a fourth embodiment of the present invention will be described with reference to FIG. The first half A, first half B, middle board IA, middle board A, middle board B, and second half A of the drying process are the same operations as the first half A, first half B, middle board IA, middle board A, middle board B, and second half of Example 2. . The second half A of the present embodiment is the same operation as the second half section of the second embodiment.

  In the fourth embodiment, the second half B is added after the second half section of the second embodiment (the second half A of the present embodiment). In the second half B, the opening degree of the intake valve 13 is set to 0%, and the exhaust operation is not performed. Instead, the cooling water valve 53 is turned on to perform the water cooling and dehumidifying operation. The purpose is as described in the third embodiment.

  In the present embodiment, the opening degree of the intake valve 13 is 58%, 48%, or 38% during partial exhaust operation (middle panel IA, middle panel A, middle panel B, second half A) that occupies most of the drying process. Although the opening is set, the opening of the intake valve 13 is preferably set as appropriate depending on the configuration of the main body.

  If the opening degree of the intake valve 13 is too wide, the clothes are dried before wrinkles are fully extended, and there is also a concern that noise increases with an increase in the exhaust air volume of the exhaust air 72.

  When the opening degree is too narrow, the air volume of the circulating air 12 increases, the temperature of the outer tub 20 and the clothes increases, and the clothes may shrink. Further, there is a concern that the air volume of the exhaust air 72 is reduced and the drying time is increased.

  As described above, in most of the drying operation, by adjusting the amount of exhausted wet air according to the dry state of the clothes, the inside of the tank is maintained at a high humidity, and the wrinkles of the clothes at the time of drying are stretched. The speed and volume of warm air can be maintained. In addition, it is possible to reduce the power consumption and the amount of water used as compared with the water-cooled dehumidifying operation, and it is possible to perform a drying operation in which the finish of clothes is improved compared to the exhaust operation.

  In this embodiment, wet air is discharged outside the machine through the drainage hose 9, but the same effect can be obtained by exhausting it directly indoors and outdoors (outdoors).

  In each of the above-described embodiments, the drum-type washing / drying machine has been described. However, the present invention can be similarly applied to a vertical washing / drying machine in which the rotation axis of the washing tub (inner tub) is provided in the vertical direction.

  The opening degree of the intake valve 13 in each embodiment will be described with reference to FIGS. 12 and 13. FIG. 12 shows changes in the opening of the intake valve 13 in the second embodiment. FIG. 13 shows a change in the opening degree of the intake valve 13 in the fourth embodiment.

  In FIG. 12, reference numeral 501 indicates the opening (0%) of the intake valve 13 in the first half A section of the drying process. Reference numeral 502 indicates the opening (100%) of the intake valve 13 in the first half B section of the drying process. Reference numeral 503 indicates the opening degree (38%) of the intake valve 13 in the middle IA section of the drying process. Reference numeral 504 indicates the opening degree (58%) of the intake valve 13 in the middle section A of the drying process. Reference numeral 505 indicates the opening degree (48%) of the intake valve 13 in the middle section B of the drying process. Reference numeral 506 indicates the opening (38%) of the intake valve 13 in the latter half of the drying process. Reference numeral 507 indicates the opening degree (58%) of the intake valve 13 in the end section of the drying process. In the first embodiment, the middle IA section shown in FIG. 12 does not exist. Since the middle IA section does not exist, in Example 1, the drying time is shortened and the dryness is insufficient. This shortage is compensated for by increasing the time of the middle board A section or the middle board B section, or the middle board A section and the middle board B section.

  In FIG. 13, reference numerals 501 to 507 are the same as those described in FIG. Reference numeral 501 indicates the opening degree (0%) of the intake valve 13 in the first half A section of the drying process. Reference numeral 502 indicates the opening (100%) of the intake valve 13 in the first half B section of the drying process. Reference numeral 503 indicates the opening degree (38%) of the intake valve 13 in the middle IA section of the drying process. Reference numeral 504 indicates the opening degree (58%) of the intake valve 13 in the middle section A of the drying process. Reference numeral 505 indicates the opening degree (48%) of the intake valve 13 in the middle section B of the drying process. Reference numeral 506 indicates the opening degree (38%) of the intake valve 13 in the latter half A section of the drying process. Reference numeral 508 indicates the opening degree (0%) of the intake valve 13 in the latter half B section of the drying process. Reference numeral 507 indicates the opening degree (58%) of the intake valve 13 in the end section of the drying process. FIG. 13 is different from FIG. 12 in that a latter half B section indicated by reference numeral 508 is inserted between a latter half A section indicated by reference numeral 506 and an end section indicated by reference numeral 507. In the third embodiment, the middle IA section shown in FIG. 13 does not exist. Since the middle IA section does not exist, in Example 3, the drying time is shortened and the dryness is insufficient. This shortage is compensated for by increasing the time of the middle board A section or the middle board B section, or the middle board A section and the middle board B section.

  As shown in FIGS. 12 and 13, in each of the above-described embodiments, the opening degree of the intake valve 13 is adjusted to be gradually reduced in the middle section. That is, the opening degree of the intake valve 13 is adjusted to become smaller as the dryness becomes higher. In the middle section, the opening of the reduced intake valve 13 is not increased. Of course, it is possible to increase the size so as not to affect the drying of the clothes.

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

  DESCRIPTION OF SYMBOLS 1 ... Base, 2 ... Outer frame, 3 ... Door, 4,7 ... Bellows, 5 ... Dehumidification duct, 6 ... Drying device, 8 ... Drain valve, 9 ... Drain hose, 10 ... Drain trap, 11 ... Outlet nozzle, 12 ... Circulating air, 13 ... Intake valve, 13m ... Intake valve drive motor, 14, 15 ... Case internal air, 16 ... External air, 17 ... Overflow pipe, 20 ... Outer tank, 21 ... Suspension, 22 ... Front cover, 23 ... back cover, 29 ... rotating drum, 30 ... laundry, 31 ... fluid balancer, 32 ... vent, 33 ... lifter, 34 ... flange, 35 ... main shaft, 36 ... drum drive motor, 37, 39 ... drainage port, 38 ... packing, 50 ... water supply valve, 51 ... cooling water supply pipe, 52 ... cooling water, 53 ... cooling water valve, 61 ... fan, 61m ... fan driving motor, 62 ... heater, 72 ... exhaust air, 102a, 102 DESCRIPTION OF SYMBOLS ... Switch, 103 ... Operation button input circuit, 104 ... Water level sensor, 105 ... Temperature sensor A, 106 ... Temperature sensor B, 114 ... Display, 113 ... Light emitting diode, 115 ... Buzzer, 120 ... Transformer, 121 ... Power supply circuit, 138... Control device, 139.

Claims (4)

An outer tub whose inside becomes a drying chamber at the time of drying, a rotating drum that is rotatably arranged in the outer tub, stores laundry, a motor that drives the rotating drum, and circulates through the outer tub An air intake device that draws external air from outside the air supply passage to the air supply passage, and a drying device that includes a heating device that heats the air flowing through the air supply passage. In a laundry dryer having
During the drying operation, the washing / drying machine is characterized in that an amount of air sucked by the intake device from outside the air passage is adjusted to be smaller than an amount of air circulating through the air passage. In the washing and drying machine according to claim 1,
The intake device has an intake valve provided in the air passage, and the air passage has an exhaust port for exhausting air flowing in the air passage to the outside. Washing characterized in that the cross-sectional area is changed, and the opening degree of the intake valve is adjusted in a range in which the cross-sectional area of the air passage is larger than the cross-sectional area of the exhaust port during the drying operation. Dryer. In the washing and drying machine according to claim 1 or 2,
A drainage hose that drains water discharged from the outer tub is configured to exhaust all or part of the air discharged from the rotating drum through the drainage hose during a drying operation.
A washing / drying machine characterized by adjusting the amount of air exhausted from the drainage hose during a drying operation. In the washing and drying machine according to claim 1 or 2,
A washing / drying machine that adjusts an amount of air exhausted from the air blowing path by the intake device.

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