Washer dryer

Abstract

To provide a washer-dryer that appropriately monitors the drying progress of clothes and controls the drying time appropriately. [Solution] The washing and drying machine of the present invention includes a blower 4 that supplies air to the outer tub 2 and the inner tub 3, and an intake port 5 that draws in the drying air from the rear of the outer tub 2. i The outlet 5 blows the drying air into the inner tank 3. o The washing machine includes a circulating air passage 5, a heater 6 provided within the circulating air passage 5 for heating the drying air, and a heat exchanger 8 provided within the circulating air passage 5 for dehumidifying the drying air by cooling it with cooling water. The washing machine calculates the amount of dehumidified water removed from the clothes based on the difference between the inlet and outlet temperatures of the drying air flowing through the heat exchanger 8, and the difference between the inlet and outlet temperatures of the cooling water flowing through the heat exchanger 8.

Description

[Technical Field]

[0001] This invention relates to a washing machine and dryer. [Background technology]

[0002] In the drying process of clothes using a washer-dryer that can perform washing and drying in a continuous cycle, a fan and heat source create high-temperature drying air, which is then blown into the washing tub to raise the temperature of the clothes and evaporate the moisture from them.

[0003] The drying air driven by the fan circulates within the air passages inside the washer-dryer. High-temperature air that has passed through a heat source picks up moisture from the wet clothes in the washing tub, and this high-temperature, high-humidity air is cooled in a cooling channel installed in the air passage, causing the moisture to condense on the cooling surface and be removed from the air. This cooled air is then passed back through the heat source, which is the heating element, to be heated again, creating dry air that is then directed back to the clothes. In a washer-dryer, this process is repeated to complete the drying process that removes moisture from the clothes.

[0004] The drying process is preferably completed when all the moisture in the numerous garments placed in the washing tub of the washer-dryer has been removed. However, since the drying of the garments progresses in a rotating washing tub within a closed space, it is not easy to directly determine whether the garments are completely dry during operation. Conventionally, an evaluation index was created based on the temperature and humidity changes at a certain point in the drying air circulating within the washing tub, and the determination was made based on whether the value of the physical quantity in that evaluation index reached a target value. As a method for evaluating the progress of garment drying in the washing tub during the drying process, there are technologies such as those described in Patent Documents 1 and 2.

[0005] Patent Document 1 discloses a technique for improving drying efficiency in the drying process of a washing machine and dryer by controlling the rotation speed of the blower to decrease when the humidity detected by the humidity sensor falls below a preset value.

[0006] Furthermore, Patent Document 2 discloses a technology that detects tangling of clothes from the time change in relative humidity of a humidity sensor installed at the outlet of the drying air passage, and prevents excessive extension of drying time by changing the rotation speed of the washing tub to untangle the clothes. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Japanese Patent Publication No. 2004-209065 [Patent Document 2] Japanese Patent Publication No. 2013-128632 [Overview of the project] [Problems that the invention aims to solve]

[0008] The technologies described in Patent Documents 1 and 2 estimate the drying state of clothes by measuring the amount of moisture in the drying air and control the drying operation method. However, the technologies described in Patent Documents 1 and 2 may misdetect the drying state of clothes when dealing with thick clothes where moisture movement inside the garment is slow, or when clothes become tangled in the washing tub, making drying difficult. In other words, even though the inside of the clothes is wet, the drying operation may end with moisture remaining inside the clothes due to uneven drying. On the other hand, if the operation control is changed to excessively extend the drying operation time to prevent the operation from ending before drying is complete, problems such as increased power consumption and fabric damage due to localized excessive temperature increases in the clothes will occur. Therefore, accurately understanding the degree of drying progress of clothes is extremely important in the operation of the drying process of a washer-dryer.

[0009] The object of the present invention is to solve the above-mentioned problems and to provide a washing machine that appropriately grasps the progress of clothes drying and appropriately controls the drying time of clothes. [Means for solving the problem]

[0010] In order to achieve the above object, the present invention provides a washing and drying machine comprising: a box body forming an outer shell; an outer tub provided inside the box body for storing washing water; an inner tub provided inside the outer tub for accommodating laundry; a blower for supplying air to the outer tub and the inner tub; a circulation air path from a suction port for sucking drying air at the rear of the outer tub to a blowout port for blowing out the drying air into the inner tub; heating means provided in the circulation air path for heating the drying air; and a heat exchanger provided in the circulation air path for dehumidifying by cooling the drying air with cooling water. In the washing and drying machine, the amount of dehumidified water dehumidified from the laundry is calculated based on the difference between the inlet temperature and the outlet temperature of the drying air flowing through the heat exchanger and the difference between the inlet temperature and the outlet temperature of the cooling water flowing through the heat exchanger.

Advantages of the Invention

[0014] In the following examples, the side with the door 1d for putting in and taking out laundry is defined as the "front," and the side opposite the door is defined as the "rear." Also, the bottom of the paper in each figure is defined as the "bottom," and the top of the paper is defined as the "top." Furthermore, looking from the side with the door 1d, the right side is defined as the "right," and the left side is defined as the "left."

[0015] Figure 1 is a cross-sectional view showing the internal structure of a drum-type washing machine / dryer S according to an embodiment of the present invention. Figure 2 is an enlarged view of the heat exchanger 8 in Figure 1. Figure 3 is an enlarged perspective view of the right side of the outer tub 2, viewed from the front, when the outer tub 2 is cut in a direction perpendicular to the rotation axis O. Figure 4 is a control block diagram of the drum-type washing machine / dryer S according to an embodiment of the present invention. In the embodiments described below, a drum-type washing machine / dryer S is given as an example of a washing machine / dryer, but the present invention is also applicable to a vertical washing machine / dryer having an inner tub with a rotation axis extending in a substantially vertical direction, and the configuration, features, and effects therefrom are the same.

[0016] The drum-type washer-dryer S performs both washing and drying of laundry. The drum-type washer-dryer S comprises a casing 1, an outer tub 2, an inner tub 3 (washing tub), a blower 4, a circulating air passage 5, a heater 6 (heating means), a drying filter 7, and a heat exchanger 8.

[0017] The outer casing of the drum-type washer-dryer S is formed by a box-shaped body 1. The front of the box-shaped body 1 is equipped with a door 1d for loading and unloading laundry and an operation panel 1P. A control device 20, which is responsible for controlling the drum-type washer-dryer S, is installed on the top of the box-shaped body 1.

[0018] The control device 20 consists of a microcomputer 21, multiple drive circuits 22 that drive various devices such as the blower 4, and multiple sensor circuits 23 that operate various sensors such as the inlet water temperature measurement sensor 101 (see Figure 4). The microcomputer 21 controls the blower 4, heater 6, circulation pump 11, motor 31, main water supply solenoid valve 32, finishing agent water supply solenoid valve 33, and cooling water supply solenoid valve 34 via the drive circuits 22, and also controls the inlet water temperature measurement sensor 101, outlet water temperature measurement sensor 102, pre-drying air cooling measurement sensor 103, and post-drying air cooling measurement sensor 104 via the sensor circuits 23.

[0019] The control panel 1P is equipped with a power switch 41 for turning the power on and off, an operation switch 42 for selecting operation menus such as washing and drying courses, a display 43 for displaying the operation menu and remaining time, and a buzzer 44 for notifying the end of operation or errors (see Figure 4). The power switch 41, operation switch 42, display 43, and buzzer 44 are electrically connected to the control device 20.

[0020] The outer tub 2 holds the washing water. The box body 1 is equipped with a main water supply solenoid valve 32 that supplies water to the outer tub 2, a finishing agent water supply solenoid valve 33 that supplies water to the finishing agent dispenser and dispenses the finishing agent into the outer tub 2, and a cooling water supply solenoid valve 34 that supplies cooling water to the heat exchanger 8 (see Figure 4). These water supply solenoid valves are installed in the upper rear part of the box body 1 (not shown in Figure 1).

[0021] The inner tub 3 is located inside the outer tub 2, and when laundry is placed inside, it rotates around a nearly horizontal axis O. The inner tub 3 is also driven to rotate by a motor 31 (see Figure 4).

[0022] During the drying process, the blower 4 supplies drying air (circulating air) into the inner tub 3 to dry the laundry.

[0023] The circulating air passage 5 connects the outer tank 2 and the blower 4. The circulating air passage 5 is equipped with a duct 5d through which drying air (circulating air) flows, a first bellows hose 5j1, and a second bellows hose 5j2. Duct 5d is located at the rear of the outer tank 2 and has an intake port 5i for drawing in drying air (circulating air). The circulating air passage 5 extends from the intake port 5i at the rear of the outer tank 2, which draws in drying air (circulating air), to the outlet port 5o that blows drying air (circulating air) into the inner tank 3. The intake port 5i is an intake port that draws circulating air from the rear of the outer tank into the circulating air passage.

[0024] The first bellows hose 5j1 and the second bellows hose 5j2 deform to prevent vibrations of the outer tank 2 generated when the inner tank 3 rotates from being transmitted to components fixed to the box body 1 (such as the blower 4 and heater 6).

[0025] The heater 6 (heating means) is located inside the circulating air passage 5. During the drying process, the heater 6 heats the drying air (circulating air) sent from the blower 4 within the circulating air passage 5.

[0026] The drying filter 7 is located inside the circulating air passage 5. During the drying process, the drying filter 7 collects lint (thread scraps) carried by the drying air (circulating air) before reaching the blower 4.

[0027] The heat exchanger 8 is installed within the circulating air passage 5 and dehumidifies the dry air (circulating air) by cooling it with cooling water. Inside the heat exchanger 8, there is a water passage 8a2 through which the cooling water flows. The surface of the pipe 8a that is struck by the dry air (circulating air) forms a heat exchange surface 8a1. In other words, the heat exchanger 8 has a water passage 8a2 formed inside the hollow pipe 8a, and a heat exchange surface 8a1 is formed on the front side of the outer surface of the pipe 8a. In addition, the heat exchange surface 8a1 is provided with a plurality of heat exchange ribs 8b that are formed to rise forward from the heat exchange surface 8a1.

[0028] One end of the first internal water distribution hose 9a is provided at the lower end of the outer tub 2. The other end of the first internal water distribution hose 9a is connected to a lint filter 10 that collects lint (fuzz) during washing and rinsing.

[0029] Downstream of the lint filter 10 is a circulation pump 11 for circulating the wash water. Downstream of the circulation pump 11 is connected to a second internal water distribution hose 9b and a third internal water distribution hose 9c which is connected to a drain valve 12. The second internal water distribution hose 9b is connected to the top of the outer tub 2 and supplies wash water into the inner tub 3. The drain valve 12 is connected to an external drain hose 13 for draining water outside the machine.

[0030] During the washing and rinsing cycles, the washing water and rinse water are circulated from the outer tub 2 through the first internal water distribution hose 9a, lint filter 10, circulation pump 11, and second internal water distribution hose 9b, as shown by the solid arrows α11 and α12 in Figure 1, and then shower-like from the top of the inner tub 3.

[0031] When draining the wash water and rinse water, the water is drained from the outer tub 2 to the outside of the drum-type washer-dryer S through the first internal water distribution hose 9a, lint filter 10, circulation pump 11, third internal water distribution hose 9c, drain valve 12, and external drain hose 13, as shown by the solid arrows α11, α13, and α14 in Figure 1. The first internal water distribution hose 9a, lint filter 10, circulation pump 11, third internal water distribution hose 9c, drain valve 12, and external drain hose 13 form a drainage path that drains the water (wash water and rinse water) accumulated in the outer tub 2 to the outside of the machine.

[0032] During the drying process, the blower 4 generates drying air to dry the laundry. The drying air that has passed through the laundry in the inner tub 3 flows out of the inner tub 3, through the outer tub 2 (dashed arrow β11), the intake port 5i (dashed arrow β12), the duct 5d (dashed arrow β13), the first bellows hose 5j1 (dashed arrow β14), the drying filter 7, the blower 4, the heater 6 (dashed arrow β15), and the second bellows hose 5j2, and circulates back into the inner tub 3 from the outlet 5o (dashed arrow β16).

[0033] The heat exchanger 8 is formed using, for example, a material containing aluminum with high thermal conductivity (such as an aluminum alloy), and is fixed within the circulating air passage 5. The heat exchanger 8 has multiple ribs formed on its exterior as heat exchange ribs 8b, and a water passage 8a2 is formed inside.

[0034] Cooling water (tap water) for dehumidification flows through the water channel 8a2. The cooling water for dehumidification is supplied when the cooling water supply solenoid valve 34 opens. The circulating air channel 5, through which circulating air flows from bottom to top (dashed arrow β13), is installed in a nearly vertical direction. The heat exchanger 8 is installed with the water channel 8a2 in a nearly vertical direction, aligned with the circulating air flowing through the circulating air channel 5. This allows the heat exchanger 8 to have a large heat conduction surface area with the circulating air in the circulating air channel 5.

[0035] On the outer surface of the heat exchanger, heat exchange occurs between the circulating air flowing through the circulating air passage 5 (dashed arrow β13) and the cooling water flowing through the internal water passage 8a2 (solid arrow α11). As a result, the dehumidifying cooling water flowing through the water passage 8a2 cools and dehumidifies the circulating air flowing through the circulating air passage 5.

[0036] The heat exchange ribs 8b are erected on the heat exchange surface 8a1, increasing the heat exchange area and promoting heat exchange. In other words, the heat exchanger 8 has multiple rib-shaped heat exchange ribs 8b as its heat exchange surface, thereby increasing the heat transfer area. The upper part of the heat exchanger 8 is equipped with a water inlet for supplying cooling water (tap water). On the other hand, the lower part of the heat exchanger 8 is equipped with a drain outlet 8h for discharging cooling water. The drain outlet 8h is connected to the water channel 8a2, and the cooling water that flows from top to bottom through the water channel 8a2 is drained outside the machine by passing through a part 2o (see Figure 1) inside the outer tank 2 from the lower part of the circulation air passage 5.

[0037] The heat exchanger 8 is equipped with a water inlet 8k for supplying cooling water to the water channel 8a2 and a drainage route (drain outlet 8h, part 2o inside the outer tank 2) for discharging water outside the machine.

[0038] As shown in Figure 3, the heat exchanger 8 in this embodiment is formed in a curved shape that follows the outer circumference of the outer tank 2 when viewed from the front. The lower part of the heat exchanger 8 is also provided with a drain recess 8L that is connected to a drain port 8h and receives the cooling water discharged from the heat exchanger 8. The drain recess 8L is composed of a bottom portion 8L1 located below and side portions 8L2 located on both the left and right sides of the bottom portion 8L1 and above the bottom portion 8L1. In other words, the drain recess 8L is formed in a concave shape from top to bottom. Furthermore, the drain recess 8L is inclined downwards from rear to front.

[0039] Cooling water that flows out from the drain port 8h into the drain recess 8L collects at the bottom 8L1 and flows downwards. Cooling water flowing along the side 8L2 also flows to collect at the bottom 8L1. The bottom 8L1 is equipped with an outlet water temperature sensor 102 that measures the temperature of the cooling water that flows out from the drain port 8h. In this embodiment, the outlet water temperature sensor 102 is positioned at the bottom 8L1 of the drain recess 8L where the cooling water that flows out from the drain port 8h collects, so that the water temperature after the cooling water has absorbed heat from the heat exchanger 8 can be accurately measured.

[0040] In this embodiment, in addition to the outlet water temperature sensor 102, there is an inlet water temperature sensor 101 that measures the temperature of the cooling water before it flows into the heat exchanger 8, a pre-cooling dry air temperature sensor 103 that measures the temperature of the dry air before it passes through the heat exchanger 8, and a post-cooling dry air temperature sensor 104 that measures the temperature of the dry air after it has passed through the heat exchanger 8. In this embodiment, the amount of dehumidified water removed from the clothing is calculated using these measurement sensors.

[0041] [Calculation of dehumidification water volume] Generally, the dehumidification rate m [kg / s] is the absolute humidity difference ω between the inlet and outlet of the heat exchanger 8. in -ω out It can be calculated using equation (1) with the mass flow rate G [kg / kg] of the dry air passing through the heat exchanger 8.

[0042]

number

[0043] On the one hand, the amount of heat Q taken away from the drying air passing through the heat exchanger 8 by the cooling water passing through the heat exchanger 8 total is the sensible heat Q of the drying air s and the latent heat of condensation Q l and can be expressed by Equation (2).

[0044]

Number

[0045] The sensible heat Q of the drying air s is based on the difference between the temperature T measured by the pre-cooling measurement sensor 103 of the drying air in and the temperature T measured by the post-cooling measurement sensor 104 of the drying air out and can be expressed by Equation (3).

[0046] [[ID=3l]]

Number

[0047] In Equation (3), C p represents the specific heat at constant pressure. On the other hand, the latent heat of condensation Q l is the difference between the amount of heat taken away by the heat exchanger 8 and the sensible heat Q of the drying air[[ID=AM]] s [[ID=4S]]and theoretically has a value determined as a function L(T in ) of the temperature T measured by the pre-cooling measurement sensor 103 of the drying air as shown in Equation (4). [[ID=Sl]]

[0048]

Number

[0049] [[ID=6l]]That is, the dehumidification rate m [kg / s] can be obtained by Equation (5). And by integrating this dehumidification rate m [kg / s] in the time direction, the dehumidified water volume [kg] can be obtained.

[0050]

Number

[0051] In equation (5), the amount of heat Q removed by the cooling water as the dry air passes through the heat exchanger 8 is the amount of heat Q removed. total It is necessary to calculate the heat quantity Q of the dry air. Since the heat quantity Q of the dry air is transferred to the cooling water via the heat exchanger 8, the heat quantity Q of the dry air transferred to the cooling water can be calculated by detecting the temperature of the cooling water. That is, the heat quantity Q total This is the outlet temperature Tw of the cooling water after it has passed through the heat exchanger 8. out And the inlet temperature of the cooling water before it passes through the heat exchanger 8 Tw in Based on the difference, it can be expressed by equation (6). In this embodiment, the inlet temperature Tw of the cooling water measured by the inlet water temperature measurement sensor 101 in (Cooling water temperature before passing through heat exchanger 8) and the outlet temperature of the cooling water measured by outlet water temperature measurement sensor 102 Tw out Using (the temperature of the cooling water after passing through the heat exchanger 8), the heat quantity Q is calculated. total Calculate.

[0052]

number

[0053] In equation (6), Gw represents the mass flow rate of water, and Cw represents the specific heat of water.

[0054] Next, the operation process of the drum-type washer-dryer S from washing to drying will be explained using Figure 5. Figure 5 is a flowchart showing the operation process of the drum-type washer-dryer S according to an embodiment of the present invention.

[0055] In step S500, the user places the laundry into the inner tub 3, presses the power switch 41, and then presses the operation switch 42 to select an operation menu for the drum-type washer-dryer S. Here, it is assumed that an operation menu including both the washing and drying processes has been selected.

[0056] In response to the operation in step S500, the control device 20 rotates the motor 31 and detects the weight of the clothes before washing (step S501). To detect the weight of the clothes, for example, the load current of the motor 31 is detected. Since the load current of the motor 31 changes according to the weight of the clothes, the weight of the clothes is calculated from the detected load current value. The calculated weight of the clothes is stored as the weight of the clothes before washing (a) in the storage unit (not shown) of the control device 20.

[0057] Next, the control device 20 controls the main water supply solenoid valve 32 to fill the outer tank 2 with water and rotates the motor 31 to perform the washing process (step S502).

[0058] After the washing process is complete, the control device 20 controls the drain valve 12 to drain the water accumulated in the outer tank 2 and rotates the motor 31 to perform the dewatering process (step S503).

[0059] After the dewatering process is completed, the control device 20 controls the main water supply solenoid valve 32 to fill the outer tank 2 with water and rotates the motor 31 to execute the rinsing process (step S504).

[0060] After the rinsing process is complete, the control device 20 controls the drain valve 12 to drain the water accumulated in the outer tank 2 and rotates the motor 31 to execute the dewatering process (step S505). In this embodiment, the rinsing process is performed once, but the rinsing process may be performed multiple times.

[0061] After the final dewatering process is completed, the control device 20 rotates the motor 31 and detects the weight of the clothes after washing (step S506). The weight of the clothes is calculated by detecting the load current of the motor 31, as in step S501, and using the value of the detected load current. The calculated weight of the clothes is stored as the weight of the clothes after dewatering (b) in the storage unit (not shown) of the control device 20.

[0062] Next, the control device 20 reads the weight of the clothes after dewatering (b) and the weight of the clothes before washing (a) stored in the memory unit, and calculates the water content of the clothes by subtracting the weight of the clothes before washing (a) from the weight of the clothes after dewatering (b) (step S507). The calculated water content of the clothes is stored as the water content of the clothes after dewatering (c) in the memory unit (not shown) of the control device 20.

[0063] Next, the control device 20 drives the blower 4, heater 6, motor 31, and cooling water supply solenoid valve 34 to execute the drying process (step S508), and calculates the amount of dehumidified water (d) removed from the clothes during the drying process (step S509). The calculated amount of dehumidified water (d) is stored in the storage unit (not shown) of the control device 20. The amount of dehumidified water (d) is calculated using the aforementioned equations (1) to (6), based on the temperature difference between the inlet and outlet temperatures of the drying air (circulating air) of the heat exchanger 8, and the water temperature difference between the inlet and outlet temperatures of the cooling water flowing through the heat exchanger 8.

[0064] Next, the control device 20 determines whether the calculated amount of dehumidified water (d) exceeds the sum of the amount of water in the clothes after dewatering (c) and the dryness adjustment allowance (x) ((c) + (x) < (d)) (step S510). Here, it is preferable to set multiple dryness adjustment allowances (x) to adjust the degree of dryness of the clothes. For example, the degree of dryness of the clothes can be set to "normal," "thorough," and "weak," and the user can select from these according to their preference.

[0065] In step S510, if the calculated amount of dehumidified water (d) exceeds the sum of the amount of water in the clothes after dewatering (c) and the dryness adjustment allowance (x), i.e., (c) + (x) < (d) (Yes in step S510), the drying process is terminated (step S511).

[0066] In step S510, if the calculated amount of dehumidified water (d) is less than the sum of the amount of water in the clothes after dewatering (c) and the dryness adjustment allowance (x), i.e., (c) + (x) > (d) (No. in step S510), the process from step S509 is repeated.

[0067] According to this embodiment, the temperature T measured by the pre-drying air cooling measurement sensor 103 in And the temperature T measured by the measurement sensor 104 after cooling with dry air. out The difference between (the difference between the inlet temperature and outlet temperature of the dry air flowing through the heat exchanger 8), and the outlet temperature Tw of the cooling water measured by the outlet water temperature measurement sensor 102. out And the inlet temperature of the coolant measured by the inlet water temperature measurement sensor 101 Tw in Since the amount of dehumidified water removed from the clothes is calculated based on the difference between the inlet and outlet temperatures of the cooling water flowing through the heat exchanger 8, the drying progress of the clothes can be appropriately monitored and the drying time for the clothes can be appropriately controlled.

[0068] Furthermore, this embodiment allows for the determination of the amount of moisture removed from clothing without the need for expensive measuring instruments such as humidity sensors, thereby reducing costs.

[0069] Furthermore, according to this embodiment, the degree of drying can be determined according to the amount of moisture removed, making it possible to complete the drying process with an appropriate amount of energy, thereby preventing excessive drying of clothes and suppressing deterioration of energy efficiency and damage to clothes.

[0070] [Variation] A modified example of this embodiment will now be described. Figure 6 is a cross-sectional view showing the internal structure of a drum-type washing machine / dryer S according to a modified example of the present invention. Components similar to those in the previously described embodiment are denoted by the same reference numerals, and their detailed descriptions are omitted.

[0071] In the modified version, a connecting hose 8h1 is provided between the drain port 8h and the first internal water distribution hose 9a (drainage path) to connect them. In addition, the outlet water temperature measurement sensor 102 is located inside the connecting hose 8h1.

[0072] In Figure 6, all the water flowing out from the drain outlet 8h passes through the connecting hose 8h1 and flows into the first internal water distribution hose 9a. In the modified example, the outlet water temperature measurement sensor 102 is placed inside the connecting hose 8h1, so that the water temperature after it has absorbed heat from the heat exchanger 8 can be accurately measured.

[0073] In the above-described embodiment, a drum-type washer-dryer was used as an example, but the present invention is also applicable to top-loading washer-dryers. Furthermore, in this embodiment, the heat exchanger 8 was described as being installed on the back of the drum-type washer-dryer, but it is naturally applicable even if it is installed in a different location. [Explanation of symbols]

[0074] 1... Enclosure, 1P... Control panel, 1d... Door, 2... Outer tank, 3... Inner tank, 4... Blower, 5... Circulation air passage, 5d... Duct, 5i... Intake, 5j1... First bellows hose, 5j2... Second bellows hose, 5o... Outlet, 6... Heater, 7... Drying filter, 8... Heat exchanger, 8L... Drain recess, 8L1... Bottom, 8L2... Side, 8a... Pipe, 8a1... Heat exchange surface, 8a2... Water channel, 8b... Heat exchange rib, 8h... Drain port, 8h1... Connecting hose, 8k... Water inlet, 9a... First internal water distribution hose, 9b... Second internal water distribution hose, 9c... Third Internal water distribution hose, 10...Lint filter, 11...Circulation pump, 12...Drain valve, 13...External drain hose, 20...Control device, 21...Microcomputer, 22...Drive circuit, 23...Sensor circuit, 31...Motor, 32...Main water supply solenoid valve, 33...Finishing agent water supply solenoid valve, 34...Cooling water supply solenoid valve, 41...Power switch, 42...Operation switch, 43...Display unit, 44...Buzzer, 101...Inlet water temperature measurement sensor, 102...Outlet water temperature measurement sensor, 103...Measurement sensor before drying air cooling, 104...Measurement sensor after drying air cooling

Claims

1. The outer shell consists of a box-like structure, The box is equipped with an outer tub for storing washing water, An inner tub for storing laundry is provided inside the outer tub, A blower that supplies air to the outer tank and the inner tank, A circulating air path from an intake port at the rear of the outer tank that draws in drying air to an outlet port that blows the drying air into the inner tank, A heating means provided within the aforementioned circulating air passage for heating the drying air, A washing and drying machine comprising a heat exchanger provided in the aforementioned circulating air passage, which dehumidifies the drying air by cooling it with cooling water, A washing machine and dryer characterized by calculating the amount of dehumidified water removed from clothing based on the difference between the inlet temperature and outlet temperature of the drying air flowing through the heat exchanger, and the difference between the inlet temperature and outlet temperature of the cooling water flowing through the heat exchanger.

2. In the washing and drying machine according to claim 1, A washing machine and dryer characterized by comprising: a pre-cooling dry air measurement sensor for measuring the inlet temperature of the dry air flowing through the heat exchanger; and a post-cooling dry air measurement sensor for measuring the outlet temperature of the dry air flowing through the heat exchanger.

3. In the washing and drying machine according to claim 2, A washing machine and dryer characterized by comprising an outlet water temperature measuring sensor for measuring the outlet temperature of the cooling water flowing through the heat exchanger, and an inlet water temperature measuring sensor for measuring the inlet temperature of the cooling water flowing through the heat exchanger.

4. In the washing and drying machine according to claim 3, The lower part of the heat exchanger is provided with a drain recess for receiving the cooling water discharged from the heat exchanger. The washing machine and dryer is characterized in that the outlet water temperature measurement sensor is provided at the bottom located below the drain recess.

5. In the washing and drying machine according to claim 3, The heat exchanger is equipped with a drain port and a connecting hose that connects to a drainage path for draining water accumulated in the outer tank to the outside of the machine. A washing machine and dryer characterized in that the outlet water temperature measurement sensor is provided inside the communication hose.

6. The outer shell consists of a box-like structure, The box is equipped with an outer tub for storing washing water, An inner tub for storing laundry is provided inside the outer tub, A motor that rotates the inner tank, A blower that supplies air to the outer tank and the inner tank, A circulating air path from an intake port at the rear of the outer tank that draws in drying air to an outlet port that blows the drying air into the inner tank, A heating means provided within the aforementioned circulating air passage for heating the drying air, A heat exchanger is provided within the aforementioned circulating air passage and dehumidifies the dry air by cooling it with cooling water, A control device that controls the motor, the blower, and the heating means, In a washing and drying machine equipped with, The control device is The steps include detecting the weight of the clothes before washing from the load current of the motor, The process includes detecting the weight of the washed clothes from the load current of the motor after the final dewatering process is completed, A step of calculating the water content of the clothing from the difference between the weight of the clothing after washing and the weight of the clothing before washing, During the drying process, the amount of dehumidified water removed from the clothing is calculated based on the difference between the inlet and outlet temperatures of the drying air flowing through the heat exchanger, and the difference between the inlet and outlet temperatures of the cooling water flowing through the heat exchanger. The steps include determining whether the amount of dehumidified water exceeds the value obtained by adding a dryness adjustment allowance to the amount of water contained in the clothing, A washing machine and dryer characterized by having the following features.

7. In the washing and drying machine according to claim 6, The washing machine and dryer is characterized in that the control device terminates the drying process when the amount of dehumidified water exceeds the amount of water in the clothes plus a dryness adjustment allowance.

Images