CN115605642A - Drum type washing machine - Google Patents

Abstract

The drum-type washing machine comprises: the left plate and the right plate are shells of side plates; an outer tank (17) supported in the housing and capable of storing liquid therein; a four-sided frame-shaped stay (10) provided above the housing; and a hanging part (8) which connects one end with the outer groove (17) and connects the other end with the stay (10) above the side plate, and hangs the outer groove (17). The thickness ratio of the thickness of the stay (10) to the thickness of the side plate is greater than 1.0.

Description

Drum type washing machine

Technical Field

The present invention relates to a drum type washing machine.

Background

As a background art in the present technical field, japanese patent laid-open No. 2009-50684 (patent document 1) is known. This publication describes: "a housing; a support body which is arranged inside the shell and rotates by taking the support body rotating shaft as a center; a washing tub which is arranged at the inner side of the support body, rotates by taking a washing tub rotating shaft in a direction different from the rotating shaft of the support body as a center and can accommodate washings at the inner side; and a washing tub rolling guide provided between the casing and the washing tub, for the washing tub rotating wheel of the washing tub to roll, wherein if the supporting body rotates about the supporting body rotating shaft, the washing tub rotating wheel rolls on the washing tub rolling guide, and the washing tub rotates about the supporting body rotating shaft and the washing tub rotating shaft (see the abstract).

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 2009-50684

Disclosure of Invention

Problems to be solved by the invention

In order to reduce the manufacturing cost of the washing machine, it is desirable to reduce the thickness of the casing of the washing machine.

However, in the technique disclosed in patent document 1, when the casing of the washing machine is thinned, the rigidity of the casing is reduced, and the washing machine is likely to vibrate.

Accordingly, an object of the present invention is to provide a drum-type washing machine that is less likely to vibrate even when the casing is made thin.

Means for solving the problems

In order to solve the above problem, the present invention is characterized by comprising: the left plate and the right plate are shells of side plates; an outer tank supported in the housing and capable of storing liquid therein; a four-frame-shaped stay arranged above the shell; and a hanging part which connects one end with the outer groove and connects the other end with the stay above the side plate, and hangs the outer groove.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, a drum-type washing machine that is less likely to vibrate even if the casing is made thin can be provided.

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

Drawings

Fig. 1 is a perspective view of a drum type washing and drying machine according to embodiment 1 of the present invention.

Fig. 2 is a schematic view of a drum type washer-dryer according to embodiment 1 of the present invention, as viewed from the top surface, with the top cover removed.

Fig. 3 is a side view showing an internal structure of a drum type washing and drying machine according to embodiment 1 of the present invention.

Fig. 4 is a graph illustrating the operation of the drum type washing and drying machine according to embodiment 1 of the present invention.

Fig. 5 is a graph showing the comparison result.

Fig. 6 is a schematic view of a drum type washing and drying machine according to embodiment 2 of the present invention, as viewed from the top surface, with the top cover removed.

Detailed Description

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

First, the problem of the present embodiment will be explained. In order to reduce the manufacturing cost of the drum-type washing machine, the casing is required to be thin. When the case is made thin, the area ratio of the case is high, and the left and right side plates are made thin, whereby an effect of reducing the manufacturing cost can be obtained. Since the suspension springs supporting the outer tub are connected to the mounting members above the side plates, when the outer tub vibrates in the dehydration step, the vibration is transmitted from the suspension springs to the side plates via the mounting members. When the vibration is transmitted to the side plates, the housing also vibrates. In order to obtain an effect of reducing high manufacturing cost, when the side plates constituting the case are thinned, the rigidity of the case is reduced, and the case vibration is likely to increase. If the vibration of the casing increases, the feeling of discomfort when the washing machine is used increases, and if the washing machine is of a built-in type suitable for a counter in a kitchen, the side wall of the counter in the kitchen may collide with the washing machine, causing abnormal noise and damage to the washing machine or the counter in the kitchen.

In the technique described in patent document 1, the rigidity of the portion where the outer tub is supported by the mounting member is sufficient. However, patent document 1 does not describe deformation of the entire housing, and when the cost is reduced by thinning the side plates, the rigidity of the housing is reduced, and therefore, the housing vibration increases, and there is a possibility that the uncomfortable feeling increases, and the above-described abnormal sound or damage occurs.

Therefore, a drum-type washing machine that is less likely to vibrate even if the casing is made thinner will be described below.

Example 1

Hereinafter, embodiment 1 for carrying out the present invention will be described with reference to the drawings. Fig. 1 is a perspective view of a drum-type washing and drying machine (drum-type washing machine) 100 according to embodiment 1, fig. 2 is a schematic view of the drum-type washing and drying machine 100 viewed from above with an upper cover 1e removed, and fig. 3 is a side view showing an internal structure of the drum-type washing and drying machine 100. The construction and operation of the drum type washing and drying machine 100 are described with reference to fig. 1 to 3. In the following embodiments, the directions of front, rear, left, right, up and down as viewed from the drum-type washing and drying machine 100 are appropriately indicated by arrows in the drawings.

As shown in fig. 1, a casing 1 constituting the outer shell of the drum-type washing and drying machine 100 is attached to a base 1a, and includes left and right side plates 1b (only the right side plate is shown in fig. 1), a front cover 1c, a rear cover 1d (see fig. 3), an upper cover 1e, and a lower front cover 1f. The upper cover 1e is provided with a water supply hose connection port 30 for supplying water from a water tap to the drum type washing and drying machine 100. The housing 1 includes a base 1a and forms a box-shaped outer frame having sufficient strength.

The door 2 is used to close an inlet (not shown) for taking in and out clothes, which is provided at the substantially center of the front cover 1c, and is supported openably/closably by a hinge provided on the front cover 1c. The door 2 is opened by pulling the door handle 2a to disengage a lock mechanism (not shown), and is locked and closed by pressing the door 2 against the front cover 1c. The front cover 1c has a circular opening for taking in and out clothes substantially concentrically with the opening of the outer tub 17 (see fig. 2).

The operation and display panel 3 provided on the upper portion of the casing 1 includes a power switch 4, an operation switch, and the like, and receives various operations to display various information. The operation and display panel 3 is electrically connected to a control unit 7 (see fig. 3) provided in the base 1 a. A drain hose 34 for draining water is attached to the base 1 a.

A four-side-frame-shaped stay 10 serving as a reinforcing member of the housing 1 is attached to an upper portion of the side plate 1b shown in fig. 2, and the stay 10 is composed of four members, i.e., a front stay 11, left and right side stays 12, and a rear stay 13. By forming the stay 10 from four members, the stay can be cut out from the steel material according to the stay size of each of the front stay 11, the side stay 12, and the rear stay 13, and therefore, the occurrence of surplus material can be suppressed. The stay 10 is formed in a rectangular frame shape by fastening (for example, using screws) the front stay 11 and the side stay 12, and the rear stay 13 and the side stay 12, respectively.

Fastening holes 14 for fastening the side plate 1b and the stay 10 are provided at four corners of the side plate 1b and the stay 10. By fastening the fastening hole 14 with, for example, a screw, the side plate 1b is rigidly joined to the stay 10, and the rigidity of the case 1 can be increased.

Two sets of outer-tub-side suspending portion attachment portions 15 are provided at the upper portion of the outer tub 17, and two sets of case-side suspending portion attachment portions 16 are provided at the left and right side stays 12. The outer groove 17 is suspended and supported by connecting the outer groove side suspending portion mounting portion 15 and the case side suspending portion mounting portion 16 with the suspending portion 8 (formed by a coil spring).

An outer tank 17 for storing water is provided inside the casing 1 of the drum-type washing and drying machine 100 shown in fig. 3. The lower portion of the outer tub 17 is supported in a vibration-proof manner by a pair of right and left suspensions 26 (composed of a coil spring and a damper) fixed to the casing 1.

The outer tub 17 houses a drum 21 for storing laundry. A motor 22 for rotating the drum 21 is provided behind the outer tub 17. In the motor 22, a shaft 22a serving as a rotation shaft penetrates the outer tub 17 and is connected to the drum 21. The control device 7 controls the rotational speed (r/min) of the motor 22. The control device 7 controls the drum type washing and drying machine 100. The control device 7 detects and acquires a sensor value of the vibration sensor 28 provided in the drum-type washing and drying machine 100. In the dehydration step, when the vibration amplitude of the outer tub 17 exceeds a value preset in the vibration sensor 28 due to imbalance of the laundry put into the drum 21, the dehydration step is temporarily stopped, the drum 21 is rotated in the normal and reverse directions, imbalance of the laundry is corrected, and the dehydration step is performed again (retry).

The drum 21 is driven by the motor 22 to rotate in both a forward direction (clockwise direction when the drum-type washing and drying machine 100 is viewed from the front) and a reverse direction (counterclockwise direction when the drum-type washing and drying machine 100 is viewed from the front). The rotation axis Az of drum 21 shown in fig. 3 is inclined so as to be horizontal or downward from the front to the rear of drum-type washing and drying machine 100 (fig. 3 is inclined so as to be downward from the rear).

A plurality of dewatering holes 21b for draining the washing water in the drum 21 to the outer tub 17, and a plurality of (only 1 shown in fig. 3) baffles 23 for lifting up the laundry put into the drum 21 at intervals in the circumferential direction of the drum 21 are provided on the inner circumferential surface of the drum 21. The baffle 23 extends in the longitudinal direction of the drum 21.

A cylindrical fluid balancer 21c is provided at the front end of the drum 21. The outer tub 17 is open at the front and is formed in a bottomed substantially cylindrical shape closed at the rear. The opening of the outer tank 17 and the inlet of the housing 1 are connected by a bellows 19 that is easily expandable and contractible in the front-rear direction. The bellows 19 is an annular elastic member, and seals the drum 21 by closing the door 2. The inlet of the casing 1, the opening of the outer tub 17, and the opening of the drum 21 communicate with each other, and the laundry can be thrown into the drum 21 by opening the door 2. The outer tub 17 can be divided into a side including the opening and a side to which the motor 22 is attached.

A water supply valve 31 is provided at a lower portion of the water supply hose connection port 30, and one end of a water supply hose 32 for supplying water to the outer tank 17 is connected to the water supply valve 31. When the valve of the water supply valve 31 is opened, water flows from the water supply hose connection port 30 to the water supply hose 32, and is supplied into the outer tub 17 through the detergent container 33.

A drain valve 34a is provided in a drain path of the drain hose 34 provided in a lower portion of the outer tank 17. When the drain valve 34a is closed, the water supplied into the outer tank 17 is accumulated in the outer tank 17, and when the drain valve 34a is opened, the washing water in the outer tank 17 is discharged to the outside of the drum-type washing and drying machine 100 through the drain hose 34.

Next, operations such as washing by the drum-type washing and drying machine 100 will be described.

In the drum type washing and drying machine 100 configured as above, first, the user presses the power switch 4 to start the drum type washing and drying machine 100. Then, the user pulls the door handle 2a, opens the door 2, and puts laundry into the drum 21. Then, after closing the door 2, the user operates the operation switch 5 to start the dryer. When the laundry machine is started, drum 21 is rotated to calculate the laundry capacity before water supply. The laundry capacity is calculated based on the rotation speed and the current value of the motor 22. At this time, as the laundry capacity increases, a load is applied to the motor 22, and the laundry capacity is determined by the current value since the current value increases. Then, the amount of the detergent to be put in is displayed on the operation/display panel 3 based on the laundry capacity. At this time, the more the calculated laundry capacity, the more the amount of the detergent to be put in. The user confirms the operation and display on the display panel 3, and puts a predetermined amount of detergent into the detergent container 33 to start the washing process.

In the washing step, the water supply valve 31 is opened, and water supplied from the water supply hose connection port 30 is supplied into the outer tub 17 together with the detergent via the water supply hose 32 and the detergent container 33. At this time, the more the calculated laundry capacity, the more the amount of water supplied in the washing process. At this time, the undissolved detergent and water are agitated in the circulation pump 27. Thus, the detergent is efficiently dissolved, and a high-concentration detergent liquid is produced. After this operation is performed for a predetermined time, the washing operation of rotating drum 21 in the normal direction, stopping, rotating drum 21 in the reverse direction, and stopping is repeated for a predetermined time. At this time, the laundry is lifted by the flap 23 and dropped, and the washing force of the laundry is increased.

After the washing step, a dehydration step is performed. In the spin-drying process, the drum 21 is first rotated at a low rotation speed at which the laundry is not stuck to the drum 21. At a low rotation speed, laundry containing water in the washing process is lifted by the baffle 23 when the drum 21 rotates, and the laundry is spread to the inner circumferential surface of the drum 21 when the laundry falls. When the laundry starts to spread, the rotation speed of the drum 21 is gradually increased to attach the laundry to the drum 21. When the laundry is stuck to the drum 21, the rotation speed of the drum 21 is increased, and the water contained in the laundry is centrifugally dewatered by reaching the target rotation speed through the resonance section of the outer tub 17 in which the vibration of the outer tub 17 is increased and the resonance section of the casing 1 in which the vibration of the casing 1 is increased.

After the dehydration step, a rinsing step is performed. In the rinsing step, the water supply valve 31 is opened, and water supplied from the water supply hose connection port 30 is supplied into the outer tub 17 through the water supply hose 32 and the detergent container 33. In addition, as in the washing process, the more the calculated laundry capacity, the more the water supply amount. In the rinsing step, the operations of normal rotation, stop, reverse rotation, and stop of the drum 21 are repeated as in the washing step. At this time, a stirring operation is performed for a predetermined time period in which the laundry lifted by the flap 23 falls.

Then, the dehydration step and the rinsing step are repeated a predetermined number of times, and the process proceeds to a final dehydration step. The operation time in the target rotation speed section of the drum 21 in the final dehydration step is set to be longer than that in the dehydration step.

After the final dehydration step, a drying step is performed. The rotation speed of drum 21 in the drying step is further reduced than that in the washing step, and warm air is blown from an air blowing means (not shown) to the laundry in drum 21 to dry the laundry while reducing wrinkles of the laundry.

Next, the operation and effect of the stay 10 will be described.

Fig. 4 is an explanatory view of the "]" -shaped stay 50 showing a comparative example of the stay 10. The "]" -shaped stay 50 is constituted by the front stay 11 and 2 side stays 12. The stay 50 supports the outer groove 17 via the hanging portion 8, similarly to the stay 10 of fig. 2.

Here, in order to compare the vibration of the case 1 between the case of using the stay 10 and the case of using the stay 50, a load is applied obliquely downward to the outer groove 17 (vibration direction of the outer groove 17), and the vibration displacement of the case 1 by the static analysis is compared.

Fig. 5 is a graph showing the comparison result. The horizontal axis of fig. 5 indicates a "thickness ratio" indicating a thickness ratio of the side plate 1b to the stay 10 or the stay 50 (plate thickness of the stay/plate thickness of the side plate). The vertical axis represents a "case vibration ratio" which is a ratio of displacement of case 1 when stay 10 is used to displacement of case 1 when stay 50 is used. In the case where the case vibration ratio is less than 1.0, the displacement of the case 1 of the stay 10 of the present embodiment is smaller than that of the stay 50 of the comparative example. When the thickness ratio is less than 1.0, the plate thickness of the side plate 1b is larger than the plate thickness of the stay, and when the thickness ratio is greater than 1.0, the plate thickness of the side plate 1b is smaller than the plate thickness of the stay.

In fig. 5, the case vibration ratio is less than 1.0 regardless of the thickness ratio, and therefore, the stay 10 of embodiment 1 can reduce the vibration of the case 1 as compared with the stay 50 of the comparative example. In addition, when the plate thicknesses of the stay 10 and the stay 50 are the same and the front stay 11, the side stay 12, and the rear stay 13 are the same size, the cross-sectional quadratic moment of the stay 10 is about 1.4 times that of the w-shaped stay 124674, so that the rigidity of the housing 1 can be increased by the stay 10 of the present embodiment, and the vibration of the housing 1 can be suppressed.

Here, the thickness of the stay, which is a reinforcing member, is generally larger than the thickness of the member to be reinforced (the thickness ratio is larger than 1.0), and cost reduction by thinning the member to be reinforced is achieved. In addition, the thickness ratio of a general washing machine is 2.0. Therefore, as described above, since the case vibration ratio is smaller than 1.0 regardless of the thickness ratio, by providing the stay 10 in the case 1, the thickness ratio can be made larger than that of a general washing machine (the thickness of the side plate 1b is made thin), and the vibration of the case 1 can be suppressed while achieving a reduction in manufacturing cost. The side plate 1b is larger in area ratio than the rear stay 13 in the case 1. Therefore, the reduction in manufacturing cost due to the reduction in thickness of the side panel 1b is greater than the increase in manufacturing cost due to the increase in thickness of the rear stay 13, and therefore, the increase in manufacturing cost can be suppressed by reducing the thickness of the side panel 1 b.

In this way, by suppressing the increase in vibration of the housing 1, it is possible to suppress an increase in uncomfortable feeling given to the user by the sound. In addition, in the built-in drum-type washing and drying machine 100, it is possible to suppress the occurrence of abnormal noise due to the collision between the side wall of the kitchen counter and the drum-type washing and drying machine 100, and the occurrence of damage to the drum-type washing and drying machine 100 or the kitchen counter.

Further, since the cross-sectional second moment of the stay 10 is increased, the stay is less likely to be deformed when a force is applied to the side plate 1b, and therefore, the packaging material can be reduced and the thickness of the drum-type washing and drying machine 100 can be reduced when the drum-type washing and drying machine 100 is conveyed, and the manufacturing cost of the drum-type washing and drying machine 100 can be reduced.

In example 1, the area ratio is such that the side plate 1b is larger than the suspending portion 8, the outer tub side suspending portion mounting portion 15, and the case side suspending portion mounting portion 16. Therefore, the reduction in the manufacturing cost due to the thinning of the side plate 1b is greater than the increase in the cost due to the addition of the suspending portion 8, the outer-tank-side suspending portion mounting portion 15, and the case-side suspending portion mounting portion 16, and therefore, the thinning of the side plate 1b can prevent the increase in the manufacturing cost.

As described above, by providing the stay 10 to the housing 1, the vibration of the housing 1 can be reduced as compared with the stay 50 of the comparative example, and the reduction in the manufacturing cost and the suppression of the vibration of the housing 1 due to the reduction in the thickness of the side plate 1b can be achieved.

Example 2

Fig. 6 is a schematic view of the drum-type washing and drying machine 100 as viewed from above with the upper cover 1e removed. In the following description, the differences between embodiment 2 and embodiment 1 will be mainly described. Common reference numerals are used for members common to embodiment 1.

In example 2, instead of the outer tub side suspending portion mounting portions 15 of example 1, front outer tub side suspending portion mounting portions 115 are provided on the left and right sides in front of the outer tub 17, and rear outer tub side suspending portion mounting portions 116 are provided on the left and right sides behind the outer tub 17. Instead of the case-side suspension attachment portions 16, front case-side suspension attachment portions 117 are provided on the left and right of the front stay 11, and rear case-side suspension attachment portions 118 are provided on the left and right of the rear stay 13. Front-housing-side suspended portion attachment portion 117 is rigidly joined to attachment hole 119 provided in front stay 11 and attachment hole 120 provided in front of side stay 12 by screws or the like. Rear case-side suspended portion attachment portion 118 is rigidly joined by being fastened with screws or the like to attachment hole 121 provided in rear stay 13 and attachment hole 122 provided behind side stay 12.

The front outer tub side suspending portion mounting portion 115 and the rear outer tub side suspending portion mounting portion 116 are connected to the front case side suspending portion mounting portion 117 and the rear case side suspending portion mounting portion 118, respectively, via the suspending portion 8, and four corners of the outer tub 17 are supported by the stay 10.

By suspending outer tub 17 at four corners, suspension 8 suppresses the front-rear and right-left movement of outer tub 17, thereby reducing the vibration of outer tub 17. Therefore, the suspending portion 8 of the outer tub 17 in example 2 can reduce the vibration of the outer tub 17 as compared with the suspending portion 8 of the outer tub 17 described in example 1. By reducing the vibration of outer tub 17, when a large imbalance occurs in outer tub 17, collision of outer tub 17 with casing 1 can be suppressed. Accordingly, when the outer diameter and depth of outer tub 17 are increased to increase the washing capacity, the collision between outer tub 17 and casing 1 can be suppressed, and therefore the washing capacity can be increased without increasing the size of the main body of drum-type washing and drying machine 100.

Further, by using the same material (for example, steel material) as that of the stay 10 as the front-case-side suspending portion mounting portion 117 and the rear-case-side suspending portion mounting portion 118, the front-case-side suspending portion mounting portion 117 and the rear-case-side suspending portion mounting portion 118 function as a reinforcing member of the case 1, and vibration of the case 1 can be reduced.

As described above, by providing stay 10 in casing 1 and supporting the four corners of outer tub 17 by suspension 8, the vibration of outer tub 17 can be reduced, and the washing capacity can be increased as compared with example 1.

The present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above-described embodiments are examples explained in detail to explain the present invention easily and understandably, and are not limited to having all the configurations explained. In addition, a part of the structure of one embodiment may be replaced with the structure of another embodiment, and the structure of another embodiment may be added to the structure of one embodiment. In addition, some of the configurations of the embodiments may be added, deleted, or replaced with other configurations.

Description of the symbols

1, a shell; 1b side plates; 8 a hanging part; 10 stays; 11 a front stay; 12 side stays; 13 rear stays; 17 an outer groove; 100 drum type washing and drying machines (drum type washing machines).

Claims (6)

1. A drum type washing machine is characterized by comprising:

the left plate and the right plate are shells of side plates;

an outer tank supported within the housing and capable of storing liquid therein;

a four-sided frame-shaped stay disposed above the housing; and

and a hanging part which connects one end with the outer groove and connects the other end with the stay above the side plate, and hangs the outer groove.

2. A drum type washing machine as claimed in claim 1,

the thickness ratio of the thickness of the stay to the thickness of the side plate is greater than 1.0.

3. A drum type washing machine as claimed in claim 1,

the four-sided frame-shaped stay includes: a front stay located in front of the housing; the side supporting strips are respectively positioned above the two side plates; and a rear stay located at the rear of the housing,

the side stays are fastened and connected with the front stay and the rear stay, so that the stay in the shape of a four-side frame is in the shape of a four-side frame.

4. A drum type washing machine as claimed in claim 1,

the four-frame-shaped stay is fastened and connected with the side plate at four corners of the four-frame-shaped stay.

5. A drum type washing machine as claimed in claim 1,

the hanging part hangs the left and right parts of the outer groove.

6. A drum type washing machine as claimed in any one of claim 1,

the hanging parts hang the outer groove at four positions, namely the front, the rear, the left and the right.

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