Installation state diagnosis system for washing machine

Abstract

To provide an installation state diagnostic system of a washing machine for determining a leg floating state of the washing machine.SOLUTION: An installation state diagnosis system of a washing machine includes a control device for determining a state of leg floating of the washing machine on the basis of vibration in a substantially depth direction of the washing machine and in a direction substantially orthogonal to the substantially depth direction due to vibration given from the outside. In the installation state diagnosis system for a washing machine, the control device determines a state of leg floating of the washing machine based on a ratio between a maximum amplitude of vibration in the depth direction and a maximum amplitude of vibration in a direction substantially orthogonal to the substantially depth direction.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a system for diagnosing the installation state of a washing machine. [Background technology]

[0002] Patent Document 1 discloses that in the initial installation diagnosis of a washing machine, the tilt detection unit uses a weight acceleration sensor to detect the tilt of the water tub on the X-axis, Y-axis, and Z-axis, and compares and calculates the tilt data with predetermined reference horizontal installation data for the washing machine body.

[0003] Patent Document 2 discloses a technology for a monitoring terminal attached to an electrical device, which notifies the operating status of the electrical device in order to solve problems such as an abnormal mounting state of the monitoring terminal or tilt of the electrical device. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-200521 [Patent Document 2] Japanese Patent Publication No. 2023-044953 Summary of the Invention [Problem to be solved by the invention]

[0005] However, although Patent Documents 1 and 2 take into consideration the tilt of the electrical equipment, it is difficult to specifically determine whether the floor itself is tilted or the legs of the electrical equipment are floating. A technology to detect this floating of the legs is desired.

[0006] An object of the present invention is to provide a system for diagnosing the installation condition of a washing machine that determines whether the legs of the washing machine are floating. [Means for solving the problem]

[0007] The washing machine installation condition diagnosis system of the present invention is characterized in that it includes a control device that determines the state of floating legs of the washing machine based on vibrations in the approximate depth direction of the washing machine and in a direction approximately perpendicular to the approximate depth direction caused by vibrations applied from the outside. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide a washing machine installation condition diagnosis system that determines whether the legs of the washing machine are floating. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a perspective view of a washing machine according to a first embodiment. [Figure 2] 1 is a cross-sectional view of the internal structure of the washing machine according to Example 1, as viewed from the right side. [Figure 3] 1 is a perspective view of the washing machine according to the first embodiment when the door is open. [Figure 4] 3 shows an example of an output of a vibration sensor according to the first embodiment. [Figure 5] FIG. 2 is a diagram for explaining determination of the installation state of the washing machine according to the first embodiment. [Figure 6] An example of determining the installation state of the washing machine according to the first embodiment will be described. [Figure 7] FIG. 2 is a diagram illustrating an installation state of each leg of the washing machine according to the first embodiment. [Figure 8] 4 is a flowchart showing a determination process for lifting of each leg of the washing machine according to the first embodiment. FIG. [Figure 9] FIG. 10 is a flowchart for determining whether legs are floating in the initial installation state of the washing machine according to the first embodiment. [Figure 10] 10 shows an example of an output of a vibration sensor according to the second embodiment. [Figure 11] 10 shows an example of an output of a vibration sensor according to the third embodiment. [Figure 12] FIG. 10 is a perspective view of a washing machine according to a fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiments are illustrative for explaining the present invention, and some omissions and simplifications have been made as appropriate for clarity of explanation. The present invention can be implemented in various other forms. Unless otherwise specified, each component may be singular or plural.

[0011] In order to facilitate understanding of the invention, the position, size, shape, range, etc. of each component shown in the drawings may not represent the actual position, size, shape, range, etc. Therefore, the present invention is not necessarily limited to the position, size, shape, range, etc. disclosed in the drawings. [Example]

[0012] A washing machine according to the present embodiment will be described with reference to Figures 1 and 2. Figure 1 shows a perspective view of the washing machine according to the first embodiment. Figure 2 shows a cross-sectional view of the internal structure of the washing machine according to the first embodiment as seen from the right side. In this embodiment, a drum-type washing machine 100 will be described as an example.

[0013] The exterior of the drum-type washing machine 100 is covered with a housing 1. The housing 1 is made up of left and right side panels 1a, a front cover 1b, a rear cover 1c, a top cover 1d, and a bottom cover 11. The top cover 1d is provided with a water supply hose connection port 30 for supplying water to the drum-type washing machine 100 from a water faucet.

[0014] A substantially circular opening 1ba is formed in the approximate center of front cover 1b, approximately concentric with opening 9a in front stay 9 and opening 17a in outer tub 17, forming an opening for putting in and taking out clothes. Door 2 is used to close opening 1ba and is supported openably and closably by a hinge (2c in Fig. 3) provided on front cover 1b. When door opening handle 2a is pulled, a locking mechanism (2d in Fig. 3) is released to open door 2, and when pressed against front cover 1b, the locking mechanism is locked and the door closes.

[0015] An operation / display panel 3 provided on the top of the housing 1 is equipped with a power switch 4 and an operation switch 5, and serves as both an operation device and a display device. The operation / display panel 3 is electrically connected to a control device 13 provided inside the housing 1. This control device 13 determines whether the legs of the washing machine are floating.

[0016] An outer tub 17 for storing water is provided inside the housing 1. The lower part of the outer tub 17 is supported in a vibration-damping manner by a total of four suspensions: suspensions 26a fixed to the left and right sides of the front of the lower cover 11, and suspensions 26b fixed to the left and right sides of the rear of the lower cover 11. The upper part of the outer tub 17 is connected to the upper stay 7 by a suspension device 12, so that the outer tub 17 is supported in a suspended state on the housing 1. The suspension device 12 is formed, for example, by a coil spring.

[0017] Four legs 40 are provided near the four corners of the lower cover 11 that forms the bottom surface of the housing 1. The legs 40 are made of a softer rubber or elastomer than the lower cover 11, reducing the transmission of vibration to the floor. Screws are attached to the top of the rubber or elastomer parts of the legs 40, and are fastened with lock nuts 41 provided near the four corners of the lower cover 11. The height of the legs 40 is adjusted by the position at which the screws are fastened. If the height of the legs 40 is not appropriate, some of the legs will be separated from the floor (leaves floating above the floor), amplifying the vibrations that occur during washing and spin-drying.

[0018] The outer tub 17 contains a drum 21 for storing clothes. A motor 22 for rotating the drum 21 is disposed behind the outer tub 17. The motor 22 has a shaft 22a, which serves as a rotation axis, passing through the outer tub 17 and connected to the drum 21. The motor 22 also has a hall element for detecting the motor rotation speed, and outputs the motor rotation speed detected by the hall element to the control device 13.

[0019] A vibration sensor 28 for detecting vibrations of the outer tub 17 is fixed to the bottom of the outer tub 17. This vibration sensor 28 is a triaxial vibration sensor, and outputs the detected triaxial vibrations to the control device 13. It measures vibrations and accelerations in two directions in the horizontal direction (approximately the depth direction and the left-right direction).

[0020] The control device 13 appropriately controls the opening and closing of the water supply valve 31, the opening and closing of the drain valve 34a, the rotation of the motor 22, the heat generation of the heater (not shown), etc., in accordance with commands input by the user via the operation / display panel 3, detected values ​​from various sensors, control programs, etc., to perform each process such as washing, rinsing, spin-drying, and drying. It also has a control mode so that each process and the leg lift state can be determined multiple times. Based on the motor rotation speed input from the motor 22, the control device 13 calculates the number of rotations of the drum 21 corresponding to that motor rotation speed, and the pulsation (rotation fluctuation) of the drum rotation speed.

[0021] When motor 22 is driven, drum 21 is driven to rotate in both forward (clockwise when viewed from the front of drum type washing machine 100) and reverse (counterclockwise when viewed from the front of drum type washing machine 100). Rotation axis T of drum 21 is horizontal from the front to the rear of drum type washing machine 100 or is inclined so that the back side is downwards. Figure 2 shows a state in which it is inclined so that the back side is downwards.

[0022] Drum 21 is provided with a plurality of dewatering holes 21b for draining the wash water in drum 21 into outer tub 17, and is provided with a plurality of baffles 23 (only one is shown in FIG. 2) on its inner circumferential surface. The baffles 23 are spaced apart around the circumferential direction of drum 21 and lift up clothes placed in drum 21 as drum 21 rotates. Baffles 23 extend in the front-to-rear direction of drum 21.

[0023] A cylindrical fluid balancer 21c is provided at the front end (front side) of the drum 21. The outer tub 17 is a generally cylindrical structure with an open front and a closed rear, and has a bottom. The opening of the outer tub 17 and the loading port of the housing 1 are connected by a bellows 19 that easily expands and contracts in the front-to-rear direction. The bellows 19 is made of an annular elastic member, and seals the drum 21 with water when the door 2 is closed. The loading port of the housing 1, the opening of the outer tub 17, and the opening of the drum 21 are all connected, and opening the door 2 allows clothes to be put into or taken out of the drum 21. The outer tub 17 can be divided into a side including the opening and a side to which the motor 22 is attached.

[0024] A water supply valve 31 is disposed below the water supply hose connection port 30. One end of a water supply pipe 32 for supplying water to the outer tub 17 is connected to the water supply valve 31. When the water supply valve 31 is opened, water flows from the water supply hose connection port 30 through the water supply pipe 32 into the detergent container 33, and is supplied into the outer tub 17 from the front water supply hose 35 or the rear water supply hose 36.

[0025] A drain valve 34a is provided in the drain path of a drain hose 34 provided at the bottom of outer tub 17. When drain valve 34a is closed, the water supplied to outer tub 17 accumulates in outer tub 17, and when drain valve 34a is opened, the wash water in outer tub 17 is drained from drain hose 34 to the outside of drum-type washing machine 100.

[0026] 3 is a perspective view of the washing machine door of Example 1 when it is opened. Door 2 is supported by hinges 2c so that it can be opened and closed, and is composed of door glass 2b and a claw 2e that engages with locking mechanism 2d. The claw 2e is linked to the door opening handle 2a, and when the locking mechanism 2d engages, door 2 is closed. In this example, vibrations applied to the main body when door 2 is closed are utilized.

[0027] Fig. 4 shows an example of vibration sensor output according to the first embodiment. The sensor output measured by the vibration sensor 28 will be described. Fig. 4(a) shows an example in which the door is closed in a normal manner with the legs firmly in place, and Fig. 4(b) shows an example in which the door is closed in a normal manner with at least one leg floating. The vibration sensor 28 measures vibrations in an approximate depth direction (hereinafter referred to as the depth direction) and in a direction approximately perpendicular to the depth direction (hereinafter referred to as the left-right direction).

[0028] In Figure 4(a), the sensor output in the depth direction shows a maximum amplitude AZ1 when the door is closed and then gradually attenuates. The sensor output in the left-right direction shows a maximum amplitude AX1 when the door is closed and then gradually attenuates. Here, AZ1>AX1.

[0029] In Figure 4(b), the sensor output in the depth direction shows a maximum amplitude AZ2 when the door is closed and then gradually attenuates. The sensor output in the left-right direction shows a maximum amplitude AX2 when the door is closed and then gradually attenuates. Here, AZ1>AX1.

[0030] In Figures 4(a) and (b), the sensor outputs AZ1 and AZ2 in the depth direction are roughly the same magnitude, but the sensor output AX2 in the left-right direction in Figure 4(b) is larger than the sensor output AX1 in the left-right direction in Figure 4(a). The closing direction of door 2 is the depth direction, and the sensor output in the depth direction indicates the strength and momentum of the closing. Figures 4(a) and (b) show that the door is closed with roughly the same strength, but the way it sways left-right is different. In other words, compared to when the legs are firmly installed, when the legs are floating, the door vibrates more greatly in the left-right direction, and the sensor output in the left-right direction is larger.

[0031] The cause of this lies in the way the drum washing machine moves due to the force when door 2 is closed. If the legs are firmly installed, the force acting in the depth direction when door 2 is closed will cause the drum washing machine to vibrate mainly in the depth direction, but if the legs are floating, the washing machine will tend to vibrate in the diagonal direction connecting the floating leg and the leg diagonally opposite it, and the force acting in the depth direction when door 2 is closed will vibrate the drum washing machine in the diagonal direction. This diagonal vibration includes not only the depth direction but also left-right vibration, and the sensor output in the left-right direction will be larger.

[0032] Fig. 5 is a diagram for explaining how to determine the installation state of the washing machine according to Example 1, showing the relationship between the sensor output when the door 2 is closed multiple times. The horizontal axis represents the sensor output (acceleration) in the depth direction, and the vertical axis represents the sensor output (acceleration) in the left-right direction, with small circles representing the sensor output when each door 2 is closed. Fig. 5(a) shows the case where the legs are firmly installed, and Fig. 5(b) shows the case where at least one of the legs is loose.

[0033] In Figure 5(a), when the legs are firmly installed, the sensor output is almost centered on the reference line. In Figure 5(b), when the legs are not firmly installed and at least one leg is floating, the sensor output varies from the reference line. It mainly varies upward from the reference line in the figure. This indicates that the sensor output in the left-right direction tends to be larger than the sensor output in the same depth direction. By evaluating this difference in variation using the distance from the reference line as an index value, it is possible to determine whether the legs are firmly installed or whether at least one leg is floating.

[0034] Looking at it from another perspective, the magnitude of the acceleration (vibration) varies depending on how hard the door is closed, making it difficult to evaluate it as an absolute value. For this reason, the acceleration (vibration) in the horizontal direction is evaluated using the acceleration (vibration) in the depth direction as the reference. By first understanding the relationship between the acceleration (vibration) in the depth direction and the acceleration (vibration) in the horizontal direction when the legs are firmly installed, it is possible to set a reference line as shown in Figure 5. The deviation of the acceleration (vibration) in the horizontal direction from that reference line is evaluated as an index value. If the legs are floating, it can be seen that the acceleration (vibration) in the horizontal direction is above the reference line. In this way, the condition of the washing machine can be diagnosed, that is, an abnormality such as floating legs can be diagnosed.

[0035] FIG. 6 shows an example of determining the installation state of a washing machine according to the first embodiment. Acceleration and index values ​​based on acceleration vary. Therefore, it is desirable to perform evaluation multiple times, for example, averaging about 10 times, rather than evaluating data from a single time. In this embodiment, the control device 13 is provided with a control mode for performing evaluation multiple times. The index value averaged every 10 times is shown. It can be seen that the index value when the legs are loose is higher than the index value when the legs are firmly installed. A threshold is set for the index value, and if the threshold is exceeded, it is determined that "legs are loose" and this is indicated on the display. In the case of an LCD panel, this is indicated by text and / or a diagram, and in the case of a 7-segment display, this is indicated as a notification code. Alternatively, the notification can be made by voice.

[0036] Furthermore, the control device 13 sends information that the legs are loose to devices connected to the washing machine via a network, such as a mobile phone, and notifies the network device by a pop-up, etc. It is more preferable to also notify the device of a request to correct the leg installation status and the contact information for a service center, etc.

[0037] As described above, an acceleration sensor attached to the washing machine or the outer tub of the washing machine can detect vibrations when the door is closed, and from the magnitude of the vibrations, it is possible to detect whether the legs are floating (improper installation). By providing an acceleration sensor that detects vibrations in at least two directions, the magnitude of the output of the acceleration sensor that measures approximately the left-right direction relative to the output of the acceleration sensor that measures approximately the door direction (depth direction) can be calculated as an index, and whether the legs are floating can be determined from the index value.

[0038] If the legs are loose, the system will alert the user and encourage them to adjust the leg height. The legs may loosen not only at the time of installation, but also as the user continues to use the machine, so the system can alert the user when they start to loosen each time the door is closed. By eliminating looseness in a timely manner and reducing vibration, the machine can operate quietly.

[0039] Furthermore, it would be even more desirable to determine the location of the leg that is floating from the static acceleration when not driving, that is, the way gravitational acceleration is applied, and to notify the user so that they know the location of the leg that is floating, as this would prevent them from having to decide which leg to adjust.

[0040] Fig. 7 is a diagram illustrating the installation state of each leg of the washing machine according to Example 1. Fig. 7(a) shows an example of determining the lifted position of each leg. Fig. 7(b) shows an example of the arrangement of vibration sensors (viewed from below).

[0041] In this example, the static acceleration sensor output is detected to determine the tilt of the washing machine body. The output value when the washing machine is placed horizontally is used as a reference, and the difference in sensor output in each direction is calculated in advance. From the calculation results, it is possible to determine where the legs are lifting, as shown in Figure 7(a).

[0042] A drum-type washing machine with a floating leg is tilted so that the floating leg is lower. Therefore, this tilt is determined from the gravitational acceleration in the depth direction and left-right direction. If the depth direction is a positive value and the left-right direction is a positive value, the tilt is downward to the front left, and the floating leg location can be determined to be the front left leg. If the depth direction is a positive value and the left-right direction is a negative value, the tilt is downward to the front right, and the floating leg location can be determined to be the front right leg. If the depth direction is a negative value and the left-right direction is a positive value, the tilt is downward to the rear left, and the floating leg location can be determined to be the rear left leg. If the depth direction is a negative value and the left-right direction is a negative value, the tilt is downward to the rear right, and the floating leg location can be determined to be the rear right leg.

[0043] Control device 13 sets the vibrations in the depth direction and the left and right direction when the washing machine is installed horizontally in advance as reference values, and determines the location of the floating legs of the washing machine based on the difference between the reference values ​​and the vibrations in the depth direction and the left and right direction of the washing machine caused by externally applied vibrations. In other words, control device 13 sets the gravitational acceleration in the approximate depth direction and in a direction approximately perpendicular to the approximate depth direction when the washing machine is installed horizontally in advance as reference values, and determines the location of the floating legs of the washing machine based on the difference between the reference values ​​and the gravitational acceleration in the approximate depth direction and in a direction approximately perpendicular to the approximate depth direction when the washing machine is stationary.

[0044] Fig. 8 is a flowchart of leg floating determination for each leg of the washing machine according to the first embodiment. This is the procedure for determining leg floating at the start of daily washing and when removing clothes. First, the leg floating determination is started. It is confirmed whether the washing machine is in operation or at rest. If the washing machine is not in operation, the determination procedure is carried out.

[0045] In S1, acceleration (vibration) is measured. Then, in S2, it is confirmed that the outer tub is not shaking. In other words, it is confirmed that the amplitude of acceleration is below a predetermined value while the washing machine is stationary. If the amplitude of acceleration is not below the predetermined value, the process returns to S1. Next, if the amplitude of acceleration is below the predetermined value, the process moves on to determining the tilt of the washing machine body in S3. In S4, acceleration is measured. The acceleration (vibration) in the depth direction and left and right direction caused by the door closing operation is detected by a sensor. Then, if the amplitude of the acceleration in the depth direction is not above a threshold in S5, the process returns to S4. If the amplitude of the acceleration in the depth direction is above the threshold in S5, a leg lift analysis (including averaging) is performed in S6. As a result, if there is no leg lift in S7, the leg lift determination ends. If there is leg lift, the presence of leg lift (leg lift location) is reported in S8, and the leg lift determination ends.

[0046] 9 is a flow chart showing a determination flow of whether the legs are floating when the washing machine is initially installed according to Example 1. The determination of whether the legs are floating when starting daily washing and when removing clothes has been described above, but this example can also be applied to the determination flow of the setting state when the washing machine is first installed and when adjusting the legs.

[0047] The installation status determination mode at the beginning of delivery of the washing machine will now be explained. First, the installation status determination is started. Next, the power is turned on and the operation and display panel 3 is set to installation confirmation mode. The control device 13 receives a door open / close operation instruction and moves on to leg floating determination. The above-mentioned leg floating determination is performed to determine the installation status. In this embodiment, the control device 13 is provided with a control mode so that it can be performed multiple times. Note that the installation status can be confirmed accurately by repeating this status diagnosis operation and determination 10 or more times. Then, the result is displayed on the operation and display panel 3, etc., and the determination is completed. [Example]

[0048] Fig. 10 shows examples of vibration sensor outputs according to Example 2. Fig. 10(a) shows the sensor output when the legs are firmly placed, and Fig. 10(b) shows the sensor output when at least one of the four legs is floating.

[0049] In Figure 10(a), the sensor output in the depth direction shows a maximum amplitude AZ1 when the door is closed and gradually attenuates. The sensor output in the left-right direction shows a maximum amplitude AX1 when the door is closed and gradually attenuates. Here, AZ1 > AX1. Here, the index value I1 is set as I1 = AX1 / AZ1. A predetermined threshold value is set for this index value. If I1 is smaller than the threshold value, it can be determined that the washing machine legs are installed correctly and are not floating.

[0050] In Figure 10(b), the sensor output in the depth direction shows a maximum amplitude AZ2 when the door is closed and gradually attenuates. The sensor output in the left-right direction shows a maximum amplitude AX2 when the door is closed and gradually attenuates. Here, AZ2 > AX2. Here, the index value I2 is set to I2 = AX2 / AZ2. If I1 is larger than the threshold, the legs of the washing machine are in a floating state, and it can be determined that an abnormality has occurred.

[0051] That is, the control device 13 determines whether the legs of the washing machine are floating based on the ratio between the maximum amplitude of the vibration (acceleration) in the depth direction and the maximum amplitude of the vibration (acceleration) in the left-right direction. The maximum amplitude of the vibration in the depth direction is AZ1, the maximum amplitude of the vibration in the left-right direction is AX1, and the index value I1 is I1=AZ1 / AZ1. If the index value I1 is smaller than a preset threshold, it is determined to be normal, and if the index value I1 is larger than the preset threshold, it is determined to be abnormal. [Example]

[0052] FIG. 11 shows an example of vibration sensor output according to the third embodiment. This is an example of detecting a leg floating from the duration of vibration of the outer tub. The degree to which the washing machine door 2 is closed is normal. FIG. 11(a) shows the sensor output in the depth direction when the leg is firmly installed. FIG. 11(b) shows the sensor output in the depth direction when the leg is floating.

[0053] As shown in FIG. 11(a), when the legs are firmly installed, the vibration caused by the door closing lasts for approximately TZ1 hours. In contrast, as shown in FIG. 11(b), when the legs are not in the air, the vibration caused by the door closing lasts for only approximately TZ2 hours. This difference makes it possible to determine whether the legs are firmly installed or not. For example, a predetermined reference value can be set for the duration, and if the duration is shorter than that reference value, it can be determined that the legs are not in the air. In other words, the control device 13 determines whether the washing machine's legs are not in the air based on the duration of the vibration in the depth direction. [Example]

[0054] FIG. 12 shows a perspective view of a washing machine according to a fourth embodiment. An acceleration sensor is detachably installed in the washing machine. A fixing jig 51 is installed on the housing of the washing machine, and a sensor device 53 (such as a smartphone) equipped with an acceleration sensor is attached to the fixing jig 51 to detect vibrations when the door is closed, and whether the legs are loose (improper installation) is detected from the magnitude and / or duration of the vibrations in the sensor output. Note that a pressing point 52 for installation confirmation may be installed, and pressing the pressing point 52 may be used to apply vibration instead of closing the door.

[0055] A smartphone (with a built-in triaxial acceleration sensor) is fixed to the housing, and a dedicated app is launched to detect whether the legs are lifted. The door is closed or the top front of the housing is pressed. The impact is detected by the built-in triaxial acceleration sensor of the smartphone, and judged in the same way as in Examples 1 to 3.

[0056] As described above, the installation status of a drum-type washing machine is determined using a vibration sensor that detects vibrations in three directions, but this can also be applied to drum-type washer-dryers, vertical washing machines, and washer-dryers. The vibration sensor method for detecting vibrations is not limited to acceleration, and can also be displacement, speed, rotational speed, etc. The axis for detecting vibrations is not limited to the left-right direction, which is approximately perpendicular to the direction in which the door is closed (depth direction), but can also be used in the up-down direction, since vibrations occur similarly. [Explanation of symbols]

[0057] 1...Case, 2...Door, 3...Operation and display panel, 4...Power switch, 5...Operation switch, 7...Upper stay, 9...Front stay, 11...Lower cover, 12... suspension device, 13... control device, 17... outer tank, 19... bellows, 21...drum, 21b...dewatering hole, 21c...fluid balancer, 22...motor, 22a...shaft, 23...baffle, 26a...suspension, 28...vibration sensor, 30...water supply hose connection port, 31...water supply valve, 32...water supply pipe, 33...detergent container, 34...drain hose, 34a...drain valve, 35...front water injection hose, 36...rear water injection hose, 40...Leg, 41...Nut, 100...Drum type washing machine

Claims

1. In the washing machine installation status diagnosis system, A washing machine installation condition diagnosis system characterized by including a control device that determines the state of floating legs of the washing machine based on vibrations in the approximate depth direction of the washing machine and in a direction approximately perpendicular to the approximate depth direction caused by vibrations applied from outside.

2. In the washing machine installation state diagnosis system according to claim 1, The control device determines the state of leg floating of the washing machine based on the ratio of the maximum amplitude of vibration in the depth direction to the maximum amplitude of vibration in a direction approximately perpendicular to the depth direction.

3. In the washing machine installation state diagnosis system according to claim 1, The washing machine installation condition diagnosis system is characterized in that the control device determines the state of leg floating of the washing machine based on the duration of the vibration in the approximately depth direction.

4. In the washing machine installation state diagnosis system according to claim 1, The control device sets gravitational acceleration in the approximate depth direction and in a direction approximately perpendicular to the approximate depth direction when the washing machine is installed horizontally as reference values, and determines where the legs of the washing machine are floating based on the difference between the reference values ​​and the gravitational acceleration in the approximate depth direction and in a direction approximately perpendicular to the approximate depth direction when the washing machine is stationary.

5. In the washing machine installation state diagnosis system according to claim 1, A washing machine installation condition diagnosis system characterized in that a sensor that detects vibrations of the washing machine at least in the approximate depth direction and in a direction approximately perpendicular to the approximate depth direction is detachably installed in the washing machine.

6. In the washing machine installation state diagnosis system according to claim 1, The washing machine installation condition diagnosis system is characterized by comprising a display device that displays the result of determining whether the legs of the washing machine are floating.

7. In the washing machine installation state diagnosis system according to claim 1, The washing machine installation status diagnosis system is characterized in that the control device is configured to be able to perform the washing machine status diagnosis operation multiple times.

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