JP2013046651A - Drum type washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drum type washing and drying machine having high detergency even though it has a size to be placed in a limited space.SOLUTION: In the drum type washing machine which comprises: a drum 3 that accommodates clothes therein and is inclined in such a manner that the rotation center becomes horizontal or an opening part side becomes higher; a motor 4 for rotatably driving the drum; a casing 1 for supporting the drum; and a lifter 3b provided on an inner peripheral surface of the drum, has the casing with a width dimension of 610 mm or less and a depth dimension of 730 mm or less, and washes the clothes by repeating an operation of lifting the clothes by rotation of the drum and the lifter and dropping the clothes by gravity force, a diameter D (mm) of the drum and a depth dimension Ld (mm) of the drum are set so as to satisfy 0.54≤(D/2)/Ld≤0.76, and the volume of the drum is set at 71 (liter) or more.

Description

  The present invention relates to a drum type washing machine.

The drum-type washing and drying machine performs washing or drying while repeatedly moving the clothes housed in the drum by centrifugal force generated by rotation of a lifter and a drum provided on the inner peripheral surface of the drum. Washing is performed by so-called tapping, in which clothing is dropped into a small amount of washing water stored in the drum. For this reason, the larger the diameter of the drum, the higher the falling height of the clothes and the higher the cleaning power. In the following Patent Document 1, a drum diameter D and a drum depth length Ld are:
(D / 2) /Ld=0.9 to 1.1
A drum-type washer / dryer is described.

JP 2007-282926 A

  In the conventional drum type washer / dryer described above, the drum diameter D is approximately twice the drum depth dimension L. Specifically, in the case of a washing capacity of 8 kg, the drum diameter D is 600 mm and the drum depth length Ld. Is preferably 280 to 310 mm. Since this washing / drying machine has a large drum diameter, it has a high detergency. Furthermore, when the drum diameter is large, the clothes easily spread when falling, and the warm air during drying is applied uniformly to the clothes, which is effective for energy saving and finishing of drying. However, in order to accommodate a drum having a large diameter, it is necessary to increase the width of the drum type washing and drying machine body. In the case of the above-mentioned drum, the width of the main body is about 670 to 700 mm, and the depth is about 600 to 620 mm.

  On the other hand, the size of the main body should be small in consideration of the carryability and installation of the drum-type washing and drying machine to a general household. Since there is a user's work space on the front side of the washing machine, there are few restrictions on installation with respect to the depth of the main unit, but there are cases where there are things that can not be moved such as walls and washstands in the horizontal direction of the washing machine storage area. Many can not be installed if the width of the main body is too large. According to our survey, when the width of the main body is 670 to 700 mm, there are about 20% of households that cannot be installed. If the width of the main body is 610 mm or less, the percentage that cannot be installed is about 2%.

  As described above, the width of the main body is preferably 610 mm or less from the standpoint of installation, but in the case of the width of the main body, the drum diameter is 500 to 530 mm. For this reason, the fall height of clothes becomes low and high detergency cannot be obtained. There are methods for increasing the cleaning power, such as increasing the washing time and increasing the water temperature, but there are problems in terms of energy saving and ease of use. For this reason, a method for increasing the detergency without using these methods is required.

  An object of the present invention is to provide a high washing power in a drum type washing machine having a small drum diameter that can be installed in a limited space.

In order to achieve the above object, the present invention provides a drum in which clothing is housed and inclined so that the center of rotation is horizontal or the opening side is high, a motor that rotationally drives the drum, and a housing that supports the drum. The drum is provided with a lifter on the inner peripheral surface of the drum, wherein the casing has a width of 610 mm or less and the casing has a depth of 730 mm or less. The rotation of the drum and the lifter In the drum type washing machine that performs washing while repeating the movement such that the clothes are lifted and dropped by gravity,
The diameter D (mm) of the drum and the depth dimension Ld (mm) of the drum are as follows:
0.54 ≦ (D / 2) /Ld≦0.76
The volume of the drum was 71 (liters) or more.

  According to the present invention, it is possible to provide a drum type washing machine having a high cleaning power even with a small drum diameter.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an external view showing a drum type washing / drying machine of Example 1; It is a perspective view which cut | disconnects some housings | casings of a drum type washing-drying machine, and shows an internal structure. It is a side view which shows the internal structure of a drum type washing-drying machine. It is a rear view which removes the back cover of a drum type washing-drying machine, and shows an internal structure. It is sectional drawing which shows the dimension of a drum. It is an experimental result which shows the relationship between a washing specific volume and a detergency index. It is an experimental result which shows the relationship between the drum depth dimension Ld and a cleaning power index | exponent. It is a schematic diagram which shows the fall state of the laundry in the drum under washing. Drum diameter D and drum depth dimension Ld. It is a block diagram of the control system of the washing and drying machine shown in FIG. It is a flowchart which shows a part of control process which the microcomputer in the controller of the control system shown in FIG. 10 performs.

  Hereinafter, examples will be described with reference to the drawings.

  In this embodiment, an example of a drum type washing and drying machine will be described.

  FIG. 1 is an external view of a drum type washing and drying machine 100 according to the first embodiment. FIG. 2 is a perspective view showing a part of the housing cut to show the internal structure, FIG. 3 is a side view showing the internal structure, and FIG. 4 is a back cover removed to show the internal structure. It is a rear view.

  The drum-type washing / drying machine 100 of this embodiment includes a drum 3 that stores clothes, performs washing, dehydration, and drying, a motor 4 that rotates the drum 3, and a casing 1 that supports the drum 3. Here, the casing 1 constituting the outer shell is mounted on a base 1h, and includes left and right side plates 1a and 1b, a front cover 1c, a back cover 1d, a top cover 1e, and a lower front cover 1f. . The left and right side plates 1a and 1b are connected by a U-shaped upper reinforcing material (not shown), a front reinforcing material 37, and a rear reinforcing material (not shown), and include a box-shaped housing including the base 1h. The body 1 is formed and has sufficient strength as a housing. The size of the housing 1 is represented by a width dimension Wb, a depth dimension Db, and a height dimension Hb.

  Also, a door 9 that closes the slot for putting in and out the clothes is provided at the approximate center of the front cover 1c, and is supported by a hinge 9c provided on the front reinforcing member so as to be opened and closed. By pulling the door opening lever 9b, the lock mechanism (not shown) is released and the door is opened. When the door is pressed against the front cover 1c, the door is locked and closed. The front reinforcing member 37 has a circular opening for putting clothes in and out concentrically with an opening of the outer tub described later. The part which closes the outer tank opening part of the door 9 is made of the concave glass 9a so that it can endure the heat at the time of drying.

  Further, an operation panel 6 is provided on the upper right side of the housing 1, and includes a power switch 11, operation switches 12 and 13, and a display 14. The operation panel 6 is electrically connected to a control device 38 provided on the top of the housing 1.

  As shown in FIG. 5, the drum 3 has a cylindrical shape that is rotatably supported, and has a large number of through-holes 3 f for water flow and ventilation in the body plate 3 e on the outer peripheral surface and the bottom plate 3 d on the back surface. An opening 3a for putting clothes in and out is provided on the front end face. A fluid balancer 3c integrated with the drum 3 is provided concentrically with the body plate 3e at the front end of the body plate 3e. A plurality of lifters 3b extending in the axial direction are provided inside the body plate 3e. When the drum 3 is rotated during washing and drying, the clothes are lifted along the body plate 3e by the lifter 3b and centrifugal force, and fall by gravity. Repeat the movement. The rotation center axis of the drum 3 is inclined so that the horizontal or opening 3a side becomes higher. The diameter of the drum plate 3e of the drum 3 is represented by D, and the depth dimension is represented by Ld. The depth dimension Ld is the length from the front end surface of the body plate 3e to the bottom plate 3d.

  Further, a cylindrical outer tub 2 for storing washing water is supported by the housing 1, includes a drum 3 on the same axis, opens on the front surface, and attaches a motor 4 to the outer center of the back surface. The rotating shaft 4 a of the motor 4 passes through the outer tub 2 and is coupled to the central portion of the bottom plate 3 d of the drum 3. An outer tub cover 2d is provided at the front opening of the outer tub 2 so that water can be stored in the outer tub. In the center of the front side of the outer tub cover 2d, there is an opening 2c for taking in and out clothing. The opening provided in the main opening 2c and the front reinforcing member 37 is connected by a rubber bellows 10. When the door 9 is closed, the glass 9a of the door 9 comes into contact with the lip of the bellows 10, and the outer tank 2 is sealed with water. When the door 9 is closed, the tip of the concave glass 9a closes the opening 2c of the outer tank cover 2d and the opening 3a of the drum 3. At this time, the axial position of the front end of the glass 9a and the front end of the drum 3 (the front end of the fluid balancer 3c) is substantially matched, and the laundry enters between the outer periphery of the glass 9a and the outer tub cover 2d. There is no consideration.

  A drain port 2b is provided at the bottom bottom of the outer tub 2 and a drain hose 26 is connected thereto. A circulation pump 22, a lint filter 23, and a drain valve 21 are provided in the middle of the drain hose 26. By closing the drain valve 21 and supplying water, water is stored in the outer tub 2, and the drain valve 21 is opened to open the outer tub. Drain the water in 2 out of the machine.

  A detergent container 7 is provided on the upper left side in the housing 1. As shown by a two-dot chain line in FIG. 1, an openable lid 7 a is opened to put detergents. The interior of the detergent container 7 is divided into a plurality of rooms so that powder detergent, liquid detergent, softener and the like can be separately charged.

  Parts related to water supply such as a water supply electromagnetic valve 16, a bath water supply pump 17, and a water level sensor 18 are provided at the upper rear of the housing 1. The top cover 1e is provided with a water supply hose connection port 16a from a water tap and a water absorption hose connection port 17a for remaining hot water in the bath. The water supply electromagnetic valve 16, the bath water supply pump 17, and the detergent container 7 are connected by a water supply pipe. The detergent container 7 is connected to the outer tub 2, and tap water or bath water is supplied to the outer tub 2 via the detergent container 7 by opening the water supply electromagnetic valve 16 or operating the bath water feed pump 17. To do. Detergents put into the detergent container 7 by the user are supplied to the bottom of the outer tub 2 together with water, and undissolved powder detergent, high-concentration liquid detergent, soft finish, etc. are directly applied to the drum 3. It is applied to the clothes inside and prevents discoloration and uneven color.

  The circulation pump 22 has two discharge ports, and the discharge port can be switched by switching the rotation direction of the circulation pump 22. Thereby, it is possible to disperse the detergent and the washing water on the laundry. When dissolving the detergent, the circulation pump 22 is rotated in the reverse direction. A small amount of water containing undissolved powder detergent supplied to the bottom of the outer tub 2 enters the circulation pump 22 from the drain port 2b through the lint filter 23, and passes through the circulating water hose 25b from the discharge port 22b. 2 circulates back to the bottom of the outer tank cover 2d. At this time, undissolved detergent and water are vigorously stirred in the circulation pump 22, and the detergent can be efficiently dissolved to produce a high-concentration detergent liquid. On the other hand, the water circulation pump 22 is rotated forward during washing. The washing water collected at the bottom of the outer tub 2 enters the circulation pump 22 from the drain port 2b through the lint filter 23, passes through the circulation water hose 25a from the discharge port 22a, and is drummed from the water spout provided at the upper part of the outer tub cover 2d. 3 is sprinkled and circulates back to the bottom of the outer tub 2. Accordingly, since the washing water can be uniformly applied to the laundry, high washing power and rinsing performance can be obtained, and water can be saved because the washing water is circulated by the circulation pump 22 and repeatedly used.

  The lint filter 23 can be easily attached and detached by opening the door 1g provided on the lower front cover 1f.

  An air trap 24 is provided at the lowermost part of the rear part of the outer tub 9, and is connected to the water level sensor 18 by a tube 18a to detect the water level in the outer tub 2.

  The outer tub 2 is supported in a vibration-proof manner by a suspension 5 (consisting of a coil spring and a damper) whose lower side is fixed to the base 1h. Moreover, the upper side of the outer tank 2 is supported by an auxiliary spring (not shown) attached to the upper reinforcing member to prevent the outer tank 2 from falling in the front-rear direction.

  A drying duct 29 is installed vertically inside the back surface of the housing 1, and a lower portion of the duct is connected to an air inlet 2 a provided below the back surface of the outer tub 2 through a rubber bellows tube 29 a. A water-cooled dehumidifying mechanism (not shown) is built in the drying duct 29, and cooling water is supplied from the water supply electromagnetic valve 16 to the water-cooled dehumidifying mechanism. The cooling water flows down along the wall surface of the drying duct 29, enters the outer tub 2 from the intake port 2a, and is discharged from the drain port 2b.

  The upper part of the drying duct 29 is connected to the drying filter 8 installed at the upper right rear side in the housing 1. The lint from the air that has entered the drying filter 8 from the drying duct 29 is removed by the mesh filter of the drying filter 8. Cleaning of the dry filter 8 is performed by pulling the dry filter 8 upward as shown by a one-dot chain line in FIG. The drying filter 8 is connected to the intake duct 33, and the other end of the intake duct 33 is connected to the intake port of the blower unit 28.

  In this embodiment, the means for blowing air into the drum 3 is provided in the housing 1 at the upper right with respect to the rotation axis of the drum 3 when viewed from the door 9 side. When rotating around and rotating counterclockwise, the clothes lifted by the rotation of the drum 3 are blown to dry. Here, the means for blowing the wind includes a blower unit 28, a heater 31 provided on the discharge side of the blower unit 28 to heat the wind, a hot air outlet 32 provided downstream of the heater 31, It is comprised with the air path which connects these.

  The blower unit 28 includes a driving fan motor 28a, a fan (not shown), and a fan case 28b. The fan case 28b incorporates a heater 31 and heats air sent from the fan. The discharge port of the blower unit 28 is connected to the hot air duct 30. The hot air duct 30 is connected to a hot air outlet 32 provided in the outer tank cover 2d through a rubber bellows tube 30a and a bellows tube joint 30b.

  In this embodiment, the area of the hot air outlet 32 is made smaller than that of the air ducts such as the drying duct 29, the hot air duct 30, and the drying filter 8, and the fan motor 28a is rotated at a high speed to generate high-pressure air. I am letting. As a result, high-speed air is blown into the drum from the hot air outlet 32, and this high-speed wind is blown onto the clothing, so that wrinkles generated in the clothing can be stretched by the wind force. Here, the high-speed wind is, for example, 45 m / s or more. Further, since the blower unit 28 is provided on the upper right side in the housing 1, the hot air outlet 32 is provided at a position diagonally above and to the right of the outer tub cover 2d, and the distance to the hot air outlet 32 is made as short as possible. It is like that. For this reason, an increase in pressure loss can be prevented, and high-speed wind can be efficiently blown onto clothing.

  A temperature sensor (not shown) is provided in front of the drain port 2b, the intake port of the blower unit 28, and the hot air outlet 32.

  The flow of wind during the drying operation is as follows. When the blower unit 28 is operated and the heater 31 is energized, high-speed hot air blows into the drum 3 from the hot air outlet 32 (arrow 41), hits the wet clothing, warms the clothing, and moisture evaporates from the clothing. During the drying operation, since the drum 3 is rotated forward and backward, the clothes are lifted up to the vicinity of the warm air outlet 32 by the lifter 3b, and high-speed wind strikes the clothes. At this time, since the distance between the warm air outlet 32 and the clothing is the shortest, wrinkles of the clothing can be stretched with a high-speed wind. The air that has become hot and humid flows from the through-hole 3f provided in the drum 3 to the outer tub 2, is sucked into the drying duct 29 from the air inlet 2a, and flows through the drying duct 29 from the bottom to the top (arrow 42). Cooling water from the water cooling and dehumidifying mechanism flows down on the wall surface of the drying duct 29, and the hot and humid air is cooled and dehumidified by coming into contact with the cooling water, and enters the drying filter 8 as dry low-temperature air. The lint is removed through the mesh filter provided in the drying filter 8, enters the intake duct 33, and is sucked into the blower unit 28 (arrow 43). Then, after being pressurized by the blower unit 28, it flows to the heater 31 (arrow 44), is heated again, and circulates so as to blow into the drum 3. Note that a heat pump may be used instead of the heater 31 of the air heating means and the water-cooled dehumidifying mechanism of the air dehumidifying means.

  The relationship between the cleaning power of the drum type washing and drying machine 100 configured as described above, the volume of the drum, the drum diameter, and the drum depth dimension will be described. The drum volume is calculated by subtracting the calculated volume obtained from the drum diameter and the drum depth dimension and the volume of the fluid balancer 3c, lifter 3b, and the protruding portion of the bottom plate 3d attached in the drum 3 from the calculated volume. There is volume. Since it is the actual volume that can actually exist and affect washing, the actual volume is used in the following description. The description will be made based on the results of an experiment with several drums having a drum volume of 65 to 86 L (liters), a drum diameter D = 500 to 600 mm, and a drum depth Ld of 275 to 394 mm and a laundry mass of 9 kg.

  FIG. 6 shows the relationship between the value obtained by dividing the drum volume by the amount of laundry substance (hereinafter referred to as the washing specific volume) and the detergency index. The greater the value, the higher the detergency index, the higher the detergency. The detergency index is a value where the detergency of a standard washing machine defined by the JIS standard measuring method for household electric washing machines (JIS C 9811) is 1. A washing machine requires a cleaning power index of 0.8 or higher, and a cleaning power index of 0.9 or higher is almost satisfactory. Within the scope of this study, the greater the washing specific volume, the greater the detergency index. However, when the specific washing volume is greater than about 8.3 L / kg, the rate of increase in the detergency index decreases and is necessary to improve detergency. It can be seen that the effect is reduced even if the drum volume is increased. From the figure, in order to obtain a detergency index of 0.8 or more, a specific washing volume of about 7.88 L / kg or more is required, and in order to obtain a detergency index of 0.9 or more, the specific washing capacity is about 8.22 L / kg. It turns out that more than kg is necessary. When the amount of laundry substance is 9 kg, the drum volume is about 71 L or more to obtain a detergency index of 0.8 or more, and about 74 L or more for a detergency index of 0.9 or more. In addition, when the laundry substance amount is 8 kg, the detergency index is 0.8 or more and the drum volume is about 63 L or more, when the detergency index is 0.9 or more, it is about 66 L or more, and when the laundry substance amount is 7 kg, the detergency index is about 0.8 or more. 55L or more, detergency index of 0.9 or more and about 58L or more.

  FIG. 7 summarizes the relationship between the drum depth dimension Ld and the cleaning power index using the drum diameter D as a parameter. The larger the drum diameter, the higher the cleaning power. This is a well-known result that the washing of the drum type washing machine is based on the washing by dropping the laundry, and the higher the fall height, the higher the cleaning power. On the other hand, it can be seen that the greater the drum depth dimension Ld, the higher the cleaning power. The reason is as follows.

  FIG. 8 is a schematic diagram showing the state of the laundry in the drum at the time of washing due to the difference in the drum depth dimension. FIG. 8A shows a case where the drum depth dimension Ld is small, and FIG. 8B shows a case where Ld is large. The amount of laundry is the same, and the drum rotates in the direction indicated by the arrow in the direction of rotation in the figure. For the sake of simplicity, the description will be made assuming that the laundry is uniformly distributed in the drum 3. The arrow in the drum indicates that the garment is lifted and dropped above the drum. When the drum depth dimension Ld is small, the thickness t of the laundry layer is increased, and the fall height h of the laundry is decreased. On the other hand, when Ld is large, the laundry is dispersed in the depth direction, so that the thickness t of the laundry layer is reduced, and as a result, the drop height h is increased. For this reason, when the depth dimension Ld is increased, the drop height is increased even with the same drum diameter, so that the cleaning power is improved. Moreover, when the depth dimension Ld is large, the clothes fall area increases (expressed by the number of arrows indicating clothes fall in the figure), thereby further improving the cleaning power.

  Therefore, even if the drum diameter D is small, if the drum depth dimension Ld is appropriately set, it is possible to obtain a cleaning power equivalent to that of a drum having a large drum diameter. For example, from the results shown in FIG. 7, the depth dimension Ld is increased to 394 mm even if the drum diameter D is reduced to 525 mm with respect to the cleaning power (point x in the figure) of the drum having the drum diameter D of 600 mm and the depth dimension Ld of 293 mm. It can be seen that substantially the same detergency can be obtained (point y in the figure). Further, when the drum diameter D is 525 mm, the laundry layer is thin and the clothes are dispersed in the depth direction. In the experiment, washing unevenness was reduced by about 20%.

  Next, the size of the drum 3 that is easy to install in a place where the drum-type washing / drying machine is used in a general household and has high cleaning power will be described. In order to increase the cleaning power, it is only necessary to increase the drum diameter D and the drum depth dimension Ld, but there are upper limit values for D and Ld in view of installation and usability.

  As described in the problem, the installation width is more affected by the width dimension Wb than the depth dimension Db of the housing 1, and if Wb is 600 mm or less, the ratio of installation is about 2%. Therefore, the maximum drum diameter that can be accommodated in this width will be described below.

  Since the drum 3 rotates in the outer tub 2, it is necessary to provide a gap in the radial direction between them. In order to reduce the gap in the radial direction, high dimensional accuracy is required for the drum 3 and the outer tub 2, leading to an increase in the cost of the product. On the other hand, if the gap is too small, power consumption increases due to an increase in windage loss during dehydration. Further, the outer tub 2 is generally made of plastic and manufactured by injection molding. However, the inner diameter of the joint with the outer tub cover 2d is the largest because of the draft angle of the mold. For these reasons, the radial gap between the drum 3 and the outer tub 2 needs to be about 25 mm, that is, the difference in diameter needs to be about 50 mm.

  During the dehydration, the drum 3 and the outer tub 2 vibrate due to the unbalance of the laundry. The outer tub 2 is supported by the suspension 5 in an anti-vibration manner with respect to the housing 1 to suppress vibration of the outer tub 2 and prevent vibration from being transmitted to the floor through the housing 1. When the number of revolutions of the drum 3 is increased from the stopped state, resonance passes at about 150 to 400 revolutions per minute. At this time, if the vibration in the left and right direction of the outer tub 2 is large, the outer tub 2 collides with the left and right side plates 1a and 1b of the housing 1 to generate an abnormal noise, so the left and right side plates 1a and 1b and the outer tub 2 It is necessary to provide a gap between the outer peripheral surface of the two. In order to reduce the left-right vibration at the time of resonance, advanced drum rotation speed control is performed so as to minimize the unbalance of the laundry so that the laundry is evenly stuck to the body plate 3e of the drum 3 at the start of dehydration. ing. In addition, the anti-vibration support is optimized to reduce left-right vibration. However, the laundry is miscellaneous, and even if it sticks uniformly to the body plate 3e, unbalance may occur due to the difference in material, and it is difficult to eliminate vibration. For this reason, the clearance between the width Wb of the housing 1 and the outer tub 2 needs to be about 20 mm on one side.

  Considering these gaps, when the width Wb of the casing 1 is 610 mm, the drum diameter D is 530 mm at the maximum.

  On the other hand, the depth direction dimension Db of the housing 1 has less influence on the installability than the lateral width Wb, and a work space for the user can be secured on the front side of the housing 1 in the installed state, and the door 9 is opened. Good. However, when installing in a waterproof pan, it is necessary to make the depth of the waterproof pan or less. However, if the depth of the base 1h of the housing 1 is set to enter the waterproof pan as shown in FIG. The depth dimension of may be larger than the waterproof pan. According to our research, when the depth dimension Db is 730 mm, the ratio of households that cannot be installed is about 10%, and when the depth dimension Db is larger than this, the number of households that cannot be installed greatly increases. The depth dimension Db should be suppressed to 730 mm or less.

  There is a door 9 on the front side of the outer tub 2, and a motor 4 as a driving unit and a drying duct 29 are provided on the rear side of the outer tub 2, so that these depth dimensions are determined from the depth dimension Db of the housing 1. The value obtained by subtracting the vibration amplitude in the front-rear direction of the outer tub 2 is the depth dimension of the outer tub 2. Further, since the gap in the depth direction between the outer tub 2 and the drum 3 is required to be approximately the same as the gap in the radial direction, the depth dimension Ld of the drum 3 is a value obtained by subtracting about 50 mm from the depth dimension of the outer tub 2. Furthermore, the drum-type washing / drying machine in which the rotation center axis of the drum 3 is inclined and the front side of the drum 3 is raised for the ease of putting the laundry in and out of the drum 3 requires a space for the inclination. It is necessary to reduce the depth of the extra tub 2.

  Therefore, in order to increase the cleaning power, the depth dimension Ld of the drum 3 may be increased by flattening the parts before and after the outer tub 2 or by reducing the vibration amplitude in the front-rear direction of the outer tub 2. However, if the depth dimension Ld of the drum is too large, the laundry on the back side of the drum cannot be reached, and the usability is greatly deteriorated. Considering usability, the drum depth dimension Ld needs to be 440 mm at the maximum, preferably 400 mm or less.

  FIG. 9 shows the relationship between the drum diameter D and the drum depth dimension Ld from which the detergency indexes 0.8 and 0.9 can be obtained from the results of FIG. As described above, the drum diameter D is set to 530 mm or less and the drum depth dimension Ld is set to 440 mm or less in consideration of installation and usability.

  First, in order to obtain a minimum cleaning power index of 0.8 as a washing machine, the drum diameter D and the drum depth dimension Ld may be set in a range surrounded by abc in the figure. Specifically, when D is 530 mm, Ld is 350 mm, and when Ld is 440 mm, D is 477 mm. When these values are expressed by (D / 2) / Ld, the range is from 0.54 to 0.76. Further, in a desirable depth dimension Ld of 400 mm, D is 498 mm and (D / 2) / Ld is in the range of 0.62 to 0.76. In addition, as described in FIG. 6, the drum volume is required to be 71 L or more when the amount of washing substance is 9 kg, 63 L or more when 8 kg, and 55 L or more when 7 kg.

  On the other hand, the drum diameter D and the drum depth dimension Ld for obtaining a substantially satisfactory detergency index 0.9 are within the range surrounded by ade in the drawing. When D is 530 mm, Ld is 379 mm, and when Ld is 440 mm, D is 515 mm. The value of (D / 2) / Ld is in the range of 0.56 to 0.70. When Ld is 400 mm, D is 515 mm and (D / 2) / L is in the range of 0.64 to 0.70. In this case, the drum volume is required to be 74 L or more when the amount of washing substance is 9 kg, 66 L or more when 8 kg, and 58 L or more when 7 kg.

  By setting the drum size and drum volume in the range of (D / 2) / Ld as described above, even a drum type washing and drying machine installed in a limited space can obtain a high detergency.

  FIG. 10 is a block diagram of the control device 38 of the drum type washer / dryer of this embodiment. A microcomputer 50 is connected to the operation button input circuit 51, the water level sensor 18, and the temperature sensor 52 connected to the switches 12 and 13, and receives various information signals in the user's button operation, washing process, and drying process. . The output from the microcomputer 50 is connected to a drive circuit 54 and connected to a water supply solenoid valve 16, a drain valve 21, a circulation pump 22, a motor 4, a blower unit 28, a heater 31, and the like, and opens / closes, rotates, and energizes them. Control. Further, it is connected to a 7-segment light emitting diode or liquid crystal display 14, a light emitting diode 56 and a buzzer 57 for notifying the user of the operating state of the washing machine.

  The microcomputer 50 is activated when the power switch 11 is pressed and the power is turned on, and executes a basic control processing program for washing and drying as shown in FIG.

Step S101
Check the status of the washer / dryer and make initial settings.

Step S102
The indicator 14 of the operation panel 6 is turned on, and a washing / drying course is set according to an instruction input from the operation button switch 13. When no instruction is input, the standard washing / drying course or the previous washing / drying course is automatically set.

Step S103
The process branches after monitoring the instruction input from the start switch 12 of the operation panel 6.

Step S104
When the start switch 12 is pressed, cloth amount sensing is performed. In the cloth amount sensing, for example, the drum 3 is rotated at a low speed or accelerated to a specified rotational speed, and the current value of the motor 4 at that time is measured. Then, the amount of detergent, the washing time, the number of times of rinsing, the dehydration time, the time until the washing and drying are completed are displayed on the display 14. The user opens the lid 7a with reference to the detergent amount display, and puts an appropriate amount of detergent into the detergent container 7 into the detergent charging chamber. If necessary, place the softener into the softener input chamber.

Step S105
The water supply electromagnetic valve 16 is opened, tap water is supplied to the detergent container 7, and the powder detergent is allowed to flow to the bottom of the outer tub 2. When the water level sensor 18 detects that the detergent has been dissolved and the water level has been supplied, the water supply is stopped. This water level is set so that the detergent concentration of the wash water generated in the next detergent dissolving step (step S106) is 10 times at maximum. The detergent concentration is defined as 1 times the standard concentration specified by the detergent manufacturer (in the case of a general powder synthetic detergent, the concentration when 20 grams of detergent is dissolved in 30 liters of water). The reason why the detergent concentration is 10 times is that if the detergent concentration is too high, there is a problem that uneven color of clothing (particularly noticeable when exposed to ultraviolet rays) due to the fluorescent brightener contained in the detergent. In order to make this uneven color inconspicuous, it is necessary to suppress the detergent concentration to 10 times or less.

Step S106
The circulation pump 22 is rotated in the reverse direction and the detergent is dissolved. The detergent is stirred and dissolved by the circulation pump 22 to generate wash water having a high detergent concentration. The time for dissolving the detergent is 1 to 2 minutes.

Step S107
Perform pre-washing. While rotating the drum 3 forward and backward at a low speed, the circulating pump 22 is rotated forward, and the high-concentration washing water generated at the bottom of the outer tub 2 is washed in the drum 3 from the water spout provided at the upper part of the outer tub cover 2d. Spread on objects. The high-concentration washing water is evenly distributed in the laundry due to the penetration of the detergent. Further, since the dissolving power against oil stains is strong, the effect of raising the stains from the laundry is very large, and the stains can be easily removed by the main washing in the next step. Since the water level in the outer tub 2 is lowered by the amount of washing water contained in the laundry, the electromagnetic water supply valve 16 is opened, and pre-washing is continued until water reaches the predetermined water level while water is supplied into the outer tub 2.

Step S108
Perform the main wash. While the drum 3 is rotated forward and backward at a low speed, the circulation pump 22 is rotated forward to circulate the washing water accumulated at the bottom of the outer tub 3 so as to fall on the laundry from the water spout. In this embodiment, since the depth dimension Ld of the drum is large, the sprinkling port shape is such that the washing water is sprayed from the front side to the back side of the drum 3 so that the washing water can be distributed evenly on the laundry. ing.

Step S109
Perform a first rinse. First, the drain valve 21 is opened and the water in the outer tub 3 is drained, and then the drum 3 is rotated in one direction at a high speed to centrifugally dehydrate the wash water contained in the laundry.

  Thereafter, the water supply electromagnetic valve 16 is opened, and water is supplied to the bottom of the outer tub 3 until the set water level is reached. Next, as with the main washing, while rotating the drum 3 forward and backward, the circulation pump 22 is rotated forward to circulate the rinse water accumulated at the bottom of the outer tub 3 so as to be sprinkled from the water spout onto the laundry. Perform a rinse.

Step S110
The number of times of rinsing is the number set in step S102. Here, a case where the number of times of rinsing is two will be described. A second (final) rinse is performed. If the softening agent is put in the softening agent charging chamber, the softening agent is supplied into the outer tub 3 at the time of final rinsing. Since the other operations are the same as those in the first rinsing, description thereof is omitted.

Step S111
The process branches after confirming whether the washing / drying course is set. When only the washing course is set, step S112 is executed, and when the washing and drying course is set, step S113 is executed.

Step S112
Perform final dehydration. The drum 3 is rotated at a high speed in one direction, and the rinse water contained in the laundry is centrifugally dehydrated. When dehydration is performed for a specified time, the drum 3 is stopped. Then, the drum 3 is rotated forward and backward at low speed, and the laundry stuck to the body plate 3e of the drum 3 is dropped by centrifugal force during dehydration, and the operation is finished.

Step S113
When the washing / drying course is set, high-speed dehydration is performed at a high speed rotation from step S112 to reduce the amount of remaining water in the clothing. At this time, the air blowing unit 28 may be operated at a low speed, and the heater 31 may be energized to blow warm air into the drum 3 to increase the temperature of the clothing. The clothes warm up and water can be effectively dehydrated from the clothes (when the temperature rises, the surface tension of the water decreases, so the water can be efficiently dehydrated).

Step S114
Perform a drying operation. The blower unit 28 is rotated, the heater 31 is energized, and the drum 3 is rotated forward and reverse at a predetermined rotation speed and rotation time, and the position of the clothes in the drum 3 is changed, and high-speed warm air is applied to the clothes. Spray. As the temperature of the entire garment rises and moisture evaporates from the garment, drying proceeds while stretching the wrinkle of the garment.

  As described above, in this embodiment, high-speed hot air having a wind speed of 45 m / s or more is blown. Therefore, even if the drum depth is large, it is possible to apply hot air to clothing on the back side of the drum 3. , Drying unevenness can be suppressed. In particular, if the warm air flows from the opening side toward the bottom plate 3d region, the warm air can easily hit the clothing in the vicinity of the bottom plate 3d. In addition, even if the space of the drum 3 is small and the space extending in the vertical direction is small, there is a space where the clothing extends on the back side.

  Drying is performed while monitoring the temperature of the warm air or the cooling water drainage using a temperature sensor, and is finished when the rate of temperature change reaches a predetermined value.

  In this embodiment, the drum type washing / drying machine has been described. However, the relationship between the housing size, the drum diameter, the drum depth dimension, and the drum volume is the same for a drum type washing machine that does not have a drying function. is there.

DESCRIPTION OF SYMBOLS 1 Housing | casing 2 Outer tank 2a Air inlet 2d Outer tank cover 3 Drum 3b Lifter 3c Fluid balancer 3d Drum bottom plate 3e Drum trunk plate 4 Motor 6 Operation panel 8 Drying filter 9 Door 16 Water supply solenoid valve 22 Circulation pump 28 Blower unit 28a Fan motor 28b Fan case 29 Drying duct 31 Heater 32 Hot air outlet 33 Intake duct 38 Control device

Claims (2)

There is a drum in which clothing is accommodated and the rotation center is inclined to be horizontal or the opening side is high, a motor that rotationally drives the drum, and a housing that supports the drum. Is provided with a lifter, the casing has a width dimension of 610 mm or less and the casing has a depth dimension of 730 mm or less, and the drum is rotated and the lifter moves by the lifter and drops by gravity. In a drum-type washing machine that performs washing while repeating
The diameter D (mm) of the drum and the depth dimension Ld (mm) of the drum are as follows:
0.54 ≦ (D / 2) /Ld≦0.76
The drum type washing machine is characterized in that the volume of the drum is 71 (liter) or more. There is a drum in which clothing is accommodated and the rotation center is inclined to be horizontal or the opening side is high, a motor that rotationally drives the drum, and a housing that supports the drum. Is provided with a lifter, the casing has a width dimension of 610 mm or less and the casing has a depth dimension of 730 mm or less, and the drum is rotated and the lifter moves by the lifter and drops by gravity. In a drum-type washing and drying machine that performs washing and drying while repeating
The diameter D (mm) of the drum and the depth dimension Ld (mm) of the drum are as follows:
0.54 ≦ (D / 2) /Ld≦0.76
And the volume of the drum is 71 (liters) or more,
A drum-type washing and drying machine that blows wind at a wind speed of 45 m / s or more from the opening to the clothes in the drum during drying operation.