JP2012245316A - Washing and drying machine and method of drying washing and drying machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing and drying machine capable of reducing power consumption without discharging humid air to a room and further allowing for drying operation in a reduced drying time.SOLUTION: A method of drying a washing and drying machine comprises at least two steps of a front half drying step and a rear half drying step. In the front half drying step, air passes through an energized Peltier unit and goes into a washing tub in which clothes have been contained and passes through the Peltier unit again to circulate. In the rear half drying step, the energization of the Peltier unit is stopped and air that is contained inside a body of the washing and drying machine is sent to the washing tub in which the clothes have been contained to dry the clothes.

Description

  The present invention relates to a washing / drying machine having a drying mechanism for drying clothes, and more particularly to a washing / drying machine having a drying mechanism for heating air for drying by a Peltier element.

Drying clothes with a washing and drying machine that can continuously perform from washing to drying creates high-temperature and low-humidity air with a heat source, and blows it into the washing tub with a blower fan to raise the temperature of the clothes and increase moisture from the clothes. Is carried out by evaporating.
Evaporated moisture can be removed by exhausting the evaporated moisture directly to the outside of the washer / dryer (always supplying fresh air) and by dehumidifying the cooled moisture to condense and remove the moisture (same air is used). Circulate).
As a technique related to the exhaust system, there is typically a washing and drying machine described in JP 2008-104715 A (Patent Document 1).

  However, in such an exhaust-type washing / drying machine, the warm air after being blown onto the laundry is exhausted to the outside of the washing / drying machine, so that the time required for drying is shortened and the amount of water used and power consumption are reduced However, there is a problem that high humidity air comes out in the room where the washing / drying machine is placed and the indoor environment is deteriorated.

In order to eliminate such problems, the above-described dehumidification method has been proposed. As a technique related to this dehumidification method, there is a washing and drying machine described in JP-A-2006-115950 (Patent Document 2).
The washing and drying machine described in Patent Document 2 heats drying air using a Peltier element and supplies the air to the washing tub. By using the heat absorbing part and the heat radiating part of the Peltier element, the washing and drying machine Both dehumidification and reheating of the air after the dehumidification are performed.
In this Patent Document 2, as a specific example thereof, a cooling pipe that is disposed along at least a part of the duct and flows a cooling medium in the lower surface direction of the duct, and provided between the duct and the cooling pipe, the heat absorbing portion is provided. It is shown that a heat exchanger is constituted by a cooling unit in which a heat radiating portion is arranged on the cooling pipe side toward the duct side.

JP 2008-104715 A JP 2006-115950 A

In the method of drying clothes using the Peltier unit proposed in the above-mentioned patent documents etc., a concrete necessary for an actual washing and drying machine such as shortening the drying period or reducing power consumption necessary for drying. No proposals were made for composition.
An object of the present invention is to provide a practical washing / drying machine capable of reducing the power consumption necessary for drying by shortening the drying period.

A feature of the present invention is that the drying process is divided into at least the first half of the drying and the second half of the drying in the washing and drying machine, and in the first half of the drying, the Peltier unit is energized and the air is passed through the Peltier unit. The air is circulated through the Peltier unit again, and the Peltier unit is de-energized in the latter half of the drying, and the air inside the washer / dryer enclosure is sent to the laundry tub where the clothes are placed. In a laundry dryer that uses external air to dry clothes.
Another feature of the present invention is that a plurality of heat absorbing fins and a plurality of heat radiating fins are planted on each of the heat absorbing plate and the heat radiating plate attached to the heat absorbing surface and the heat radiating surface of the Peltier unit. In the air dryer duct which comprises a dryer, it exists in the washing-drying machine arrange | positioned so that a heat absorption fin may be located in an upstream along the flow of air, and a heat radiation fin may be located in a downstream.

  According to the present invention, in the first half of the drying, air from the washing tub flows to the heat absorption surface of the Peltier unit to absorb heat, so that the temperature difference between the heat absorption surface and the heating surface can be reduced and the coefficient of performance of the Peltier unit can be increased. Also, in the latter half of the drying, the Peltier unit is de-energized, and the drying is performed with the outside air including the heat of the motor or the like placed inside the washer / dryer casing, so that the power consumption required for the drying can be reduced. Furthermore, the effect which can shorten drying time by this can also be expected.

1 is a perspective view of a washing / drying machine according to an embodiment of the present invention. It is sectional drawing which shows the cross section of the washing-drying machine which becomes one Example of this invention, and shows the operation state at the time of dehumidification heating by the Peltier unit of the first half of a drying process. It is sectional drawing which shows the cross section of the washing-drying machine which becomes one Example of this invention, and shows the operation state at the time of ventilation exhaust_gas | exhaustion of the latter half of a drying process. It is a figure for demonstrating the relationship of the maximum coefficient of performance with respect to the temperature difference of the thermal radiation surface of a Peltier device, and an thermal absorption surface. It is a perspective view of the Peltier unit used for the washing and drying machine which becomes one Example of this invention. It is sectional drawing which provided the Peltier unit used for the washing-drying machine which becomes one Example of this invention in the ventilation duct. It is a driving | running pattern figure of the drying process of the washing-drying machine which becomes one Example of this invention. It is a block diagram of the control apparatus of the washing dryer which becomes one Example of this invention. It is a flowchart figure of the control processing program of the washing dryer which becomes one Example of this invention. It is sectional drawing which shows the cross section of the washing-drying machine which becomes the other Example of this invention, and shows the operation state of a drying process. It is sectional drawing which provided the Peltier unit used for the washing-drying machine which becomes the other Example of this invention in the ventilation duct.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view of a drum-type washing / drying machine which is a type of a washing / drying machine according to an embodiment of the present invention. A washing / drying machine main body 70 is composed of a steel plate and a resin molded product placed on the base 1. The outer frame 2 is configured by combining them, the door 3 provided in front of the outer frame 2 for taking in and out laundry, a front cover 22 and a back cover 23.
In addition, a power switch 47 and an operation panel 48 are provided above the front cover 22, and the display panel 7 and operation buttons 24, 24 a and 24 b are provided on the operation panel 48.

FIG. 2 shows a cross section of a drum-type washing / drying machine, which is a kind of washing / drying machine. The schematic structure of the drum-type washing / drying machine and the washing and dehydrating steps will be briefly described.
An outer tub 20 is provided inside the outer frame 2, and the outer tub 20 is supported by a plurality of suspensions 21 at the bottom.
The rotating drum 29 that constitutes the washing tub inside the outer tub 20 has the laundry 30 that is put in with the door 3 opened, and the outer periphery of the opening of the rotating drum 29 is imbalanced with the laundry 30 during dehydration. A fluid balancer 31 is provided for reducing vibration caused by the above. A plurality of lifters 33 for lifting the laundry 30 are provided inside the rotary 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 serves to maintain the watertightness between the outer tub 20 and the door 3. This prevents water leakage during washing, rinsing and dehydration.
The rotary drum 29 has a large number of small holes (not shown) for centrifugal dehydration and ventilation on the side wall, and a drain port 37 opened on the bottom wall of the outer tub 20 is connected to the drain hose 9 via the drain valve 8. Connecting.
The overflow hose 17 is attached to a blower duct 40 fixed to the rear surface of the drum, and merges with the hose 37A from the drain outlet 37 before the drain valve 8. That is, when the drain valve 8 is opened, the drain hose 9 is communicated.

The drying device 6 including the air duct 5 for guiding the air flow to the laundry 30 in the rotating drum 29, the fan 49 as the air blowing means, and the heater 50 is fixed to the outer frame 2 apart from the outer tub 20 (not shown). The outlet of the heater 50 and the blowout nozzle 11 are connected to the outer tub 20 approximately perpendicularly to the outer tub 20 by a bellows 71 having a flexible structure between the uppermost surface and the center of the outer tub 20 and in front of the center of the outer tub 20. The vibration of the tank 20 is absorbed.
Temperature sensors (not shown) are provided at the air inlets and outlets of the drain holes 37 and the fan 49. In the air duct 40, a dehumidifying heat exchanger that performs dehumidifying heat exchange on the connection side with the rotary drum 29 via the bellows hose 52, and a heating heat exchanger on the upper side where the air blowing fan and the intake valve are disposed are dehumidified. A Peltier unit 54 serving as a heating means is provided.

In the washing process, the drum-type washing / drying machine constructed in this manner is rotated by putting the laundry 30 into the rotary drum 29, supplying water with the drain valve 8 closed, and storing the washing water in the outer tub 20. The drum 29 is rotated to wash the laundry 30.
In the case of a drum-type washing / drying machine, after washing the laundry 30 is lifted to the top of the drum by the lifter 33 as the drum rotates, tapping washing that drops to the bottom of the drum by gravity becomes the mainstream.
Since the overflow hose 17 is connected to the air duct 40, the washing water may flow to the position of the overflow hose 17 of the air duct 40 in some cases.
Further, during the washing process, water is poured into the air duct 40 by the water injection tool 61 which is a cleaning device provided at the upper part of the air duct 40 in order to wash out lint (lint) in the air duct 40. The water injection tool 61 will be described later.
Since the bellows hose 52 and the outer tub side mounting portion 53 that connect the back surface of the outer tub 20 and the bottom of the air duct 40 are inclined downward from the air duct 40 toward the back surface of the outer tub 20, Is immediately drained from the outer tub 20 through the drainage port to the outside of the machine at the end of washing.
Next, in the dehydration step, the drain valve 8 is opened to drain the washing water in the outer tub 20, and then the rotary drum 29 is rotated to perform centrifugal dehydration.
Even if a part of the dehydrated water is wound up to the air duct 40 side, the bellows hose 52 that connects the rear surface of the outer tub 20 and the bottom of the air duct 40 and the outer tub side mounting portion 53 are connected from the air duct 40 to the rear surface of the outer tub 20 Since it has a downward slope toward the part, it can be quickly returned to the outer tank side.
When high-speed dehydration is reached, vibration is transmitted to the outer tub 20 and the outer tub 20 itself may be slightly vibrated. However, since the air duct 40 is fixed to the casing, the rear surface of the outer tub 20 and the bottom of the air duct 40 The bellows hose 52 connecting the two can absorb a part of the vibration.

Next, the drying process, which is a feature of the present invention, will be described. In this embodiment, the drying process is determined from at least the first half of the drying process and the second half of the drying process.
First, in the first half of the drying process, the air supply valve 13 operates so as to open the outlet of the air duct 40, and the drain valve 8 opened during the dehydration process is closed to perform the drying described below.
In the first half of the drying process, air flows as indicated by the arrows shown in FIG. 2, the air heated by the heater 50 or the Peltier unit 54 is blown into the rotary drum 29, and air is sent through the nozzle 11 to wash the laundry. Heat is exchanged with 30 and moisture is evaporated from the laundry 30.
Here, the heater 40 may or may not be used with the Peltier unit 54. When it is used together with the Peltier unit 54, it is used in the case of a strong mode in which clothes are desired to be dried quickly. Otherwise, the Peltier unit 54 generates hot air.
Next, the air that has become highly humid including the evaporated water is led to the fan suction port through the air duct 40, and is heated again by the Peltier unit 54 and the heater 50 provided at the fan outlet if necessary, to rotate the rotating drum 29. Although the air is blown in, the humid air at the outlet of the rotary drum 29 in the circulating flow of air passes through the outer tub 20 and the air duct 40 and is saturated by exchanging heat with the outer tub 20 and the air duct 40. Water corresponding to the decrease in vapor pressure is condensed on the outer tank 20 and the wall surfaces of the air duct 40.
Further, dehumidification and heating are performed by the Peltier unit 54 provided in the air duct 40, so that dehumidification can be performed without extremely reducing the temperature of the hot air.
Moisture condensed in the air duct 40 and condensed water dehumidified by dehumidifying heat exchange of the Peltier unit 54 eventually accumulate in the bellows hose 52 from the bottom of the air duct 40, but from the air duct 40 toward the back of the outer tub 20. Therefore, the condensed water can also be transferred to the vicinity of the drainage port via the outer tub 20.
Next, in the latter half of the drying process, the air supply valve 13 closes the outlet of the blower duct 40 and opens the drain valve 8 so as to allow the humid air to escape to the drain pipe to promote drying.
FIG. 3 shows the flow of air in the washing / drying machine in the latter half of the drying process. In this case, since the outlet of the air duct 40 is closed by the air supply valve 13 as described above, the air passes through the air duct 40. It does not pass.
First, by opening the intake valve 13 on the suction side of the fan 49, the outlet of the air duct 40 is closed by the intake valve 13, and the air in the housing outside the air duct 40 is sucked by the suction force of the fan 49 to rotate the rotating drum 29. Blow in.
Accordingly, since air for drying does not flow through the air duct 40, the energization of the Peltier unit 54 is stopped.
High-humidity air pushed out of the rotary drum 29 by the blowing operation passes through the drainage hose 9 from the drainage port 37, passes through the overflow hose 17, breaks the water seal of the drainage trap 10, and is discharged to the drainage hole 39.
In the case of a general drain trap, the water sealing height is about 50 to 80 mm. Therefore, the pressure on the drain hose 9 side is required to be about 1000 Pa or more to break the water sealing.
Moreover, in order to suppress the odor from the drain outlet 39, it is necessary to ensure high pressure (pressure more than predetermined) even after breaking the water seal, and the air exhaust process of exhausting high-humidity air from the drain hose 9 The rotation of the fan 49 is controlled so as to maintain a high pressure inside.
The exhaust from the rotary drum 29 is exhausted to the drain trap 10 through the connection hose from the drain port 37 to the drain valve 8 and the overflow hose 17.
On the other hand, instead of the high-humidity air discharged from the rotating drum 29 through the drainage hose 9, the air supplied mainly from the bottom of the housing to the inside of the housing is between the air supply holes 18 at the top of the housing. Since it is passed through the periphery of the rotary drum driving motor 36 and the fan motor 51, it becomes hot and is taken into the air passage through the air supply valve 13 and supplied to the rotary drum 29 so as to contribute to the drying of clothes. become.
For this reason, normally, the heater 50 provided at the outlet of the fan 49 does not need to be energized, but may be used in the strong mode or the like.
The exhaust from the rotary drum 29 is exhausted again to the drain trap 10 through the connection hose from the drain port 37 to the drain valve 8 and the overflow hose 17. By repeating this, the clothes are dried.
An exhaust path for exhausting air from the rotary drum 29 through the overflow hose 17 and the drain valve 8 includes an outer tank side mounting part 53 and a bellows hose 52 on the back surface of the outer tank 20. Therefore, the inflow angle of the exhaust gas into the air duct 40 becomes an obtuse angle larger than 90 degrees, and the air path loss in the exhaust path can be reduced.
After the drying is completed, the pressure on the drain hose 9 side is kept higher than the pressure on the drain port 39 side, and the rotational speed of the fan 49 is lowered to a pressure level that does not break the water seal. The water sealing of the drain trap 10 is restored and the drying process is completed.

  In this way, after the drying is completed, water is supplied to the drainage port 37 via the drainage hose 9 while maintaining the pressure on the drainage hose 9 side at a predetermined level or more, so that the drain trap 10 The water seal can be restored.

  The drain trap 10 may be recovered at the end of the drying operation or after the end of the drying operation as long as the pressure on the drain hose 9 side is kept high.

Fig. 4 shows the change in coefficient of performance with respect to the temperature difference between the heat-absorbing surface and the heat-dissipating surface of the Peltier element. Here, the coefficient of performance is the amount of heat released on the heat-dissipating surface divided by the electrical input of the Peltier element. is there.
In general, when the temperature difference between the heat absorption surface and the heat dissipation surface is small, the Peltier element can efficiently draw heat from the heat absorption surface to the heat dissipation surface, and the efficiency decreases due to heat conduction or the like as the temperature difference increases. For this reason, as in the present embodiment, the heat absorption surface of the Peltier unit 54 and the air in the air duct are directly heat exchanged without using a cooling medium, so that the circulating air is not excessively cooled during dehumidification by the heat absorption surface.
Since the amount of heat to be heated is the sum of the amount of heat absorbed and the input, the amount of heat to be heated to the air always exceeds the amount of heat to be dehumidified, and the temperature of the circulating air in the first half of the drying in which hot air is circulated to open the outlet of the air duct 40 by the intake valve 13 The level gradually rises, and heat can be efficiently stored while dehumidifying by warming the circulation system including the rotary drum 29 including clothes, the outer tub 20, and the air duct 40.

FIG. 5 is a schematic configuration diagram of a Peltier unit 54 used in the present invention. A Peltier element 57 of the Peltier unit 54 includes a heat absorbing surface 59 that is a cooling surface and a heat radiating surface 60 that is a heating surface.
A heat absorption plate 59A is fixed to the heat absorption surface 59 of the Peltier element 57, and a heat dissipation plate 60A is fixed to the heat dissipation surface 60. A plurality of heat exchange fins 59B are planted on the heat absorbing plate 59A to constitute a dehumidifying heat exchanger 55, and a plurality of heat exchange fins 60B are planted on the heat radiating plate 60A to constitute a heating heat exchanger 56. Has been.
As shown in the drawing, the heat exchange fins 59B and the heat exchange fins 60B are planted by being divided into three parts on both sides of the rectangular heat absorption plate 59A and the heat radiation plate 60A so as to cross perpendicularly to the air flow. .
Here, the number of blades of the heat exchange fins 59B and 60B is optimally selected in accordance with the washing / drying machine. As can be seen from the drawing, the Peltier unit 54 is formed in a substantially rectangular parallelepiped shape because the heat exchange fins 59B and 60B are dimensioned in a complementary relationship.

  At the top of the Peltier unit 54, two water injection devices 61 for supplying cleaning water for washing out lint in the air duct 40 are provided. The dehumidifying heat exchanger 55 and the heating heat exchanger 56 are also provided. It is designed to be washed together.

FIG. 6 shows a configuration in the case where the Peltier unit 54 is provided in the air duct 40, the dehumidifying heat exchanger 55 is located on the upstream side with respect to the air flow, and the heating heat exchanger 56 is located on the downstream side. As shown in FIG. Two bolt through holes 74 are provided in the vicinity of the end portions of the heat absorbing plate 59A and the heat radiating plate 60A of the Peltier unit 54, and bolts 72 are inserted into the bolt through holes 74 and fixed to the wall surface 40A of the air duct 40 by nuts 73. .
In the present embodiment, the dehumidifying heat exchanger 55 and the heating heat exchanger 56 are provided in the air duct 40 extending in the vertical direction of the washing / drying machine main body and dehumidifying the circulating air flowing through the air duct 40. The shape is expanded in the opposite direction with the element 57 as the center.
Moreover, in order to improve heat transfer to the air of the dehumidifying heat exchanger 55 and the heating heat exchanger 56, the heat transfer is improved by dividing the fin length in the flow direction by a predetermined length and cutting the boundary layer. It has become.
In the dehumidifying heat exchanger 55, the amount of condensed water flowing down from the upper side increases toward the upstream side of the air (lower side of the heat exchanger), but the condensed water is repeatedly connected and divided by the separation of the fins. Since it can be collected to some extent, drainage can be done quickly.
In addition, in the heat exchanger, the lint is apt to be attached because the surface is cute. Usually, the air duct 40 is provided with a water injection tool 61 for cleaning, and this water also divides the fins. By this, it is possible to make it easy to repeatedly bond and split at the fin breaks.
FIG. 7 schematically shows the operation pattern of the drying process and the change in the temperature of the hot air sent to the rotating drum 29 in the present embodiment.
In the first half of the drying process, air is circulated between the rotating drum 29 and the air duct 40 by the fan 49. At this time, the Peltier unit 54 in the air duct 40 is energized to dehumidify the high-humidity air that has entered the air duct 40 from the rotary drum 29 to the dew point.
The dehumidified air is heated by the heating heat exchanger 56 attached to the heating surface 60 of the Peltier unit 54 at the upper part of the air duct 40 on the downstream side when viewed from the air flow.
Since the heating amount is the sum of the heat absorbed from the cooling surface and the input of the Peltier, the circulating air can gradually increase the temperature level.
In other words, heat can be stored in the circulation system including clothing such as the outer tub 20 and the air duct 40 while dehumidifying the circulation air by the Peltier unit 54.
In the latter half of the drying process, the air inside the housing outside the air duct 40 is sucked and blown into the rotary drum 29 in order to close the air duct 40 with the intake valve 13 on the suction side of the fan 49.
Since the intake valve 13 obstructs the air passage in the air duct connecting to the rotary drum 29, the pressure in the rotary drum is increased, and this pressure causes high-humidity air in the rotary drum to be exhausted to the drain hole through the overflow hose and the drain hose. Is done.
Although it is possible to circulate partially depending on the opening / closing ratio of the intake valve, in this embodiment, since it is fully closed, the Peltier unit 54 is not energized, and the air in the housing heated by the exhaust heat of the fan motor and the main motor It is sent to the rotating drum as warm air with adiabatic compression of the fan. For this reason, warm air temperature falls with progress of time, and it falls to the outside temperature vicinity at the end of drying. The warm air temperature in the latter half of the drying process can have various temperature characteristics depending on the opening degree of the air supply valve 13 and the like.

FIG. 8 is a block diagram of the control device 41 of the washing / drying machine. The microcomputer 26 is connected to the operation button input circuit 25, the water level sensor 44, the temperature sensor 45, and the vibration ship 6 connected to the switches 24, 24a, 24b. Then, various information signals are received in the user's button operation, washing process, and drying process.
The output from the microcomputer 26 is connected to the drive circuit 5 and sent to the water supply electromagnetic valve 28, the drain valve 8, the motor 26, the fan 49, the heater 50, the intake valve 13, and the like, and controls the opening / closing, rotation, and energization thereof. . Further, it is connected to a 7-segment light emitting diode display 7, a light emitting diode 15, and a buzzer 19 for notifying the user of the operating state of the washing machine.
When the power switch 47 is pressed and the power is turned on, the microcomputer 26 starts a control program and executes basic control processing of washing and drying as shown in FIG.
Hereinafter, the operation after the power switch is turned on will be described based on the flowchart.
<Step S101>
In this step, the state of the washing and drying machine such as each sensor, the water supply electromagnetic valve 28, the drain valve 8, the motor 26, the fan 49, the heater 50, the intake valve 13, and the like are checked and initialized.
<Step S102>
When the state check and initial setting of the washing / drying machine are completed, the display 7 of the operation panel 48 is turned on, and a washing / drying course is set according to an instruction input from the operation button switch 24.
When no instruction is input, the standard washing / drying course or the previous washing / drying course is automatically set. For example, when an instruction is input to the operation button switch 24a, a high finishing course for drying is set.
<Step S103>
An instruction input from the start switch 24 of the operation panel 48 is monitored to determine whether or not there is an input.
<Step S104>
When the input of the start switch 24 is confirmed, washing is performed. Laundry is performed in the order of washing, intermediate dehydration, rinsing, and final dehydration. However, since it is the same as a normal drum-type washing and drying machine, detailed description thereof is omitted.
<Step S105>
When the washing process is finished, it is determined whether or not a washing / drying course is set. If only the washing course is set, the driving is finished. On the other hand, when the washing / drying course is set, the process proceeds to the next step.
<Step S106>
If a washing / drying course is set, hot air dehydration is performed. In the hot air dehydration, the fan 49 is operated at a low speed, and the Peltier unit 54 is energized to blow hot air into the rotary drum 29 and raise the temperature of the clothes. At the same time, the rotating drum 29 is rotated at a high speed to effectively dehydrate moisture from the warmed clothing (because the viscosity of water decreases as the temperature rises, it can be efficiently dehydrated).
In the present embodiment, the rotation speed of the fan 49 is set to about 11000 rotations per minute, so as not to exceed the allowable current value (15 A).
Water that has flowed into the air duct 40 from washing to dehydration can be quickly removed from the drain 20 through the bellows hose 52 and the outer tub side mounting portion 53 that are inclined downward toward the back surface of the outer tub 20, so that it is dried. Heat loss at the time can be reduced.
<Step S107>
When the hot air dehydration is finished, the drying operation is executed by rotating the tank left and right. The fan 49 is rotated at a high speed, energized including the Peltier unit 54 and, in some cases, the heater 50, repeatedly rotating the rotating drum 29 forward and backward, and changing the position of the clothing in the rotating drum 29, Spray on clothing.
At this time, the condensed water dehumidified from the high-humidity air in the air duct 40 is quickly drained through the bellows hose 52 and the outer tank side mounting part 53 that are inclined downward from the bottom of the air duct 40 toward the back surface of the outer tank 20. Since it can remove to the hole 37 vicinity, it can avoid that condensed water becomes a heat loss with respect to a warm air.
<Step S108>
It is confirmed whether or not the elapsed time from the start of drying has reached a specified time, and when the elapsed time is confirmed, the process proceeds to the next step.
<Step S109>
When the specified time has elapsed from the start of drying, or when the difference between the intermediate temperature and the initial temperature is greater than the specified temperature, the dryness of the laundry (= the mass of the dry cloth / the mass of the compress) is 0. 90-0.95 is determined, the energization of the Peltier unit 54 is turned off, the air supply valve 13 is opened (the outlet of the air duct 40 is closed), the fan 49 is rotated at a high speed, and the moisture of the laundry 30 is drained. To the drain 39.
Since the air duct is inclined upward from the back surface of the outer tub 20 to the air duct 40, the air path loss at the inflow portion of the air duct 40 can be reduced.
<Step S110>
In this step, the lower drainage port temperature T1a and the outside air temperature T2a of the outer tub 20 are measured (setting of the initial temperature), and the process proceeds to the next step.
<Step S111>
In this step, it is confirmed whether or not the elapsed time from the start of drying has reached a specified time. If the specified time has not been reached, this determination is repeated, and when the specified time has been reached, the process proceeds to the next process.
<Step S112>
When the specified time has passed, the lower drainage port temperature T1b and the outside air temperature T2b of the outer tub 20 are measured to determine the end of drying, and when the measurement is completed, the process proceeds to the next step.
<Step S113>
It is checked whether or not the elapsed time from the start of exhausting has reached a specified time. If the specified time has not been reached, the process proceeds to step S114, and if the specified time has been reached, the process proceeds to step S115.
<Step S114>
In step S114, the difference between the intermediate temperature of the lower drainage port temperature and the outside air temperature of the outer tub 20 and the end determination temperature is obtained (ΔT1 = T1a−T1b, ΔT2 = T2a−T2b), and the temperature difference (ΔT1−ΔT2). ) Is over the specified temperature. If the temperature difference (ΔT1−ΔT2) is equal to or higher than the specified temperature, the process proceeds to step S115. If the temperature difference (ΔT1−ΔT2) is equal to or lower than the specified temperature, the process returns to step S112 and the above-described processing is performed.
<Step S115>
In step S115, when the specified time has elapsed from the start of exhausting, or when the difference between the intermediate temperature and the end temperature is greater than the specified temperature, the dryness of the laundry (= the mass of the dry cloth / the mass of the compress) is It is determined that the drying has been completed because the pressure is 1.0 or more, and the rotation speed of the fan 49 is lowered to a pressure level that does not break the water seal while keeping the pressure on the drainage hose 9 side higher than the pressure on the drainage hole 39 side. Is opened to allow tap water to flow, and the water trap of the drain trap 10 is recovered.
This tap water may serve as washing water for washing the dehumidifying heat exchanger and the heating heat exchanger of the Peltier unit 54, or may be supplied from another system.
<Step S116>
In step S116, it is confirmed whether or not the elapsed time after opening the water supply electromagnetic valve 28 executed in step S115 has reached a specified time. If the specified time has not been reached, the process proceeds to step S117. The process proceeds to step S118.
<Step S117>
If it is determined in step S116 that the specified time has not been reached, it is checked whether or not the pressure of the water level sensor 44 has reached the specified pressure. If the pressure of the water level sensor 44 has not reached the specified pressure, the process returns to step S116. When the pressure of the water level sensor 44 reaches the specified pressure, the process proceeds to step S118.
<Step S118>
This step determines that the water sealing of the drain trap 10 has been recovered when a specified time has elapsed since the water supply electromagnetic valve 28 was opened, or when the pressure of the water level sensor 44 has exceeded the specified pressure. 49 and the motor 36 are stopped, the air supply valve 13 is further closed, and then the water supply electromagnetic valve 28 is closed to complete the drying process.

  Since the washing and drying machine configured as described above takes in external air into the housing and warms it by exhaust heat from the outer tub 20, the motor 36, the fan 49, etc. in order to supplement the air inside the housing sucked into the fan 49. Compared with the case of sucking in external air, the power consumption in the drying process can be reduced by about 7% of the whole.

    Moreover, even if external air is sucked in, the moisture in the laundry 30 is discharged from the drain hose 9 to the drain outlet 39, so that the indoor environment is not deteriorated.

The outer tub side mounting portion 53 of the bellows hose 52 that connects the back surface portion of the outer tub 20 and the bottom of the air duct 40 has an upward slope from the outer tub 20 toward the air duct 40 with respect to the washing machine installation surface. The structure of the bellows hose 52 is inclined by raising the position of the mounting portion at the bottom of the air duct 40 than the position of the mounting portion on the back surface of the outer tub 20, so that it can be It is possible to reduce heat loss due to the removal of residual water, and further air path loss during the exhaust process.
Next, another embodiment of the present invention will be described with reference to FIGS. 10 and 11, and this example shows a modification of the Peltier unit 54.
10 and 11, a partition plate 75 is provided between the heat absorbing plate 59A attached to the heat absorbing surface 59 and the heat radiating surface 60 of the Peltier element 57 and the heat radiating plate 60A, and dehumidifying heat exchange on the heat absorbing surface side of the Peltier unit 54 is performed. The air passing through the vessel 55 and the air passing through the heating heat exchanger 56 on the heat radiation surface side are completely separated.
Further, the dehumidifying heat exchanger 55 and the heating heat exchanger 56 are arranged. The dehumidifying heat exchanger 55 is located on the housing side, and the heating heat exchanger 56 is located on the drum side.
With such an arrangement, the heat loss from the air duct on the heating heat exchanger 5 side to the housing can be effectively used in the air exhaust operation in the latter half of the drying, and further due to the heat radiation of the main motor 36. Since the left side of the air duct is warmed, the effect of reducing the heat loss itself can be expected.
Then, the air flowing into the Peltier unit 54 of the air duct 40 is roughly divided into two, passes through the dehumidifying heat exchanger 55 and the heating heat exchanger 56, respectively, and dehumidified air because the partition plate 75 is eliminated at the outlet of the Peltier unit 54. And heated air mix.
By setting it as such a structure, the dehumidification exchanger 55 and the heat exchanger 56 can be ensured toward the flow direction of the ventilation duct 40, and a larger heat transfer area can be ensured.
For this reason, since the temperature difference between the dehumidifying surface 59 and the heating surface 60 can be further reduced, an operation with a high coefficient of performance is possible.

DESCRIPTION OF SYMBOLS 1 ... Base, 2 ... Outer frame, 3 ... Door, 4 ... Bellows, 5 ... Drive circuit, 6 ... Drying device, 7 ... Indicator, 8 ... Drain valve, 9 ... Drain hose, 10 ... Drain trap, 11 ... Blow out Nozzle, 12 ... circulating air, 13 ... air supply valve, 14 ... housing internal air, 15 ... light emitting diode, 16 ... external air, 17 ... overflow hose, 18 ... air supply hole, 19 ... buzzer, 20 ... outer tank, 21 DESCRIPTION OF SYMBOLS ... Suspension, 22 ... Front cover, 23 ... Back cover, 24, 24a, 24b ... Switch, 25 ... Operation button input circuit, 26 ... Microcomputer, 27 ... Filter duct, 28 ... Water supply solenoid valve, 29 ... Rotary drum, 30 ... Laundry, 31 ... Fluid balancer, 32 ... Motor fixture, 33 ... Lifter, 34 ... Metal flange, 35 ... Spindle, 36 ... Drum drive motor, 37 ... Drain hole, 38 ... Pack Down, 39 ... drain outlet, 40 ... air duct, 41 ... controller, 42 ... inlet, 43 ... base portion, 44 ... water level sensor, 45 ... temperature sensor, 46 ... vibration sensor,
47 ... Power switch, 48 ... Operation panel, 49 ... Fan, 50 ... Heater, 51 ... Fan motor, 52 ... Bellows hose, 53 ... Outer tank side mounting part, 54 ... Peltier unit, 55 ... Dehumidification heat exchanger, 56 ... Heating heat exchanger, 57 ... Peltier element, 58 ... cutting plate, 59 ... heat-absorbing surface, 60 ... radiating surface, 61 ... cleaning device.

Claims (6)

An outer tub whose inside becomes a drying chamber at the time of drying, an inner tub that is rotatably arranged in the outer tub and accommodates laundry, a motor that drives the inner tub, and supports the outer tub and constitutes an exterior A housing, a drain hose for discharging water discharged from the outer tub, an outlet opening toward the inner tub for blowing air for drying into the inner tub, and an opening toward the outer tub In a washing and drying machine comprising an air passage having an inlet, a drying device having a Peltier unit that heats the air that flows in the air passage and that flows through the air passage, and a blower fan,
An outside air intake path for guiding outside air around the casing through the inside of the casing to the air passage downstream from the Peltier unit;
An air supply valve that selectively switches between the air passage and the outside air intake passage;
The drying step is divided into at least a first half of drying and a second half of drying, and in the first half of drying, the outside air intake passage is closed by the air supply valve, and the air that has passed through the Peltier unit by energizing the Peltier unit is Air is circulated through the inlet of the air passage or through the Peltier unit again to the inner tank, and in the latter half of the drying, the air passage is closed by the air supply valve, and energization of the Peltier unit is stopped. A washing and drying machine comprising: a control device that sends air inside the housing from the outside air intake passage to the inner tub. 2. The washing / drying machine according to claim 1, wherein the latter half of the drying opens a drain valve for draining the outer tub, and exhausts the humid air in the outer tub to the outside of the casing through the drain hose. A washing dryer characterized by. An outer tub whose inside becomes a drying chamber at the time of drying, an inner tub that is rotatably arranged in the outer tub and accommodates laundry, a motor that drives the inner tub, and supports the outer tub and constitutes an exterior A housing, a drain hose for discharging water discharged from the outer tub, an outlet opening toward the inner tub for blowing air for drying into the inner tub, and an opening toward the outer tub A blower passage having an inlet; a blower fan provided on the outlet side of the blower passage; a Peltier unit that is provided in the middle of the blower passage to heat air flowing through the blower passage; the Peltier unit and the blower fan; Washing equipment provided between the housing and the air supply valve for switching the connection between the air passage, the drainage valve for flowing the water from the outer tub to the drainage hose, and a control device for performing washing and drying processes In the dryer
The control device is at least in the drying step,
The air supply valve cuts off the connection between the air passage and the inside of the housing, and sends air that has passed through the Peltier unit by passing through the Peltier unit to the inner tank and again from the inlet of the air passage to the Peltier unit. A first step of continuing the step of circulating air through the first predetermined time; and
When the first predetermined time is finished, the step of closing the air supply passage by the air supply valve, stopping energization of the Peltier unit and sending the air inside the housing to the inner tank for the second predetermined time The drying method of the washing dryer characterized by performing the 2nd process continued over a long time. 4. The drying method for a washing and drying machine according to claim 3, wherein the second step opens a drain valve for draining the outer tub for the second predetermined time, and discharges the humid air in the outer tub to the drain. A drying method for a washing / drying machine, wherein a process of exhausting the outside of the casing through a hose is executed. An outer tub whose inside becomes a drying chamber at the time of drying, an inner tub that is rotatably arranged in the outer tub and accommodates laundry, a motor that drives the inner tub, and supports the outer tub and constitutes an exterior A housing, a drain hose for discharging water discharged from the outer tub, an outlet opening toward the inner tub for blowing air for drying into the inner tub, and an opening toward the outer tub In a washing and drying machine comprising an air passage having an inlet, a drying device having a Peltier unit that heats the air that flows in the air passage and that flows through the air passage, and a blower fan,
The Peltier unit has a plurality of heat absorption fins and a plurality of heat dissipation fins planted on each of the heat absorption plate and the heat dissipation plate attached to the heat absorption surface and the heat dissipation surface, and the direction of each fin follows the air flow in the air passage. A washer-dryer characterized in that heat-absorbing fins are located on the upstream side and heat-radiating fins are located on the downstream side. 6. The washing and drying machine according to claim 5, wherein the plurality of heat absorbing fins and the plurality of heat radiating fins are divided into a plurality at intervals in a direction orthogonal to the air flow. .

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