Water level detecting device and pulsator washing machine

Abstract

The present application relates to the technical field of washing machines, in particular to a water level detection device and a pulsator washing machine. The water level detection device comprises a communication pipeline, a magnetic float ball, a magnetic ball, a rotating rod and an angle detection mechanism; the lower end of the communication pipeline is in communication with the lower side of a washing tub, and the magnetic float ball is arranged in the communication pipeline; one end of the rotating rod is connected with the magnetic ball, and the rotating rod is rotatably connected with a main body of the device; when the water level detection device is in a working state, the liquid level in the communication pipeline and the liquid level in the washing tub are flush, the magnetic float ball floats on the liquid surface, the magnetic ball is attracted by the magnetic float ball and moves with the magnetic float ball to rotate the rotating rod, and the angle detection mechanism detects the rotation angle of the rotating rod to obtain the position of the liquid surface. The water level detection device of the present application is not affected by external air pressure, temperature and liquid composition, has the advantages of accurate liquid level detection, and can accurately detect the change value of the liquid level in the communication pipeline.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of washing machines, in particular to a water level detection device and a pulsator washing machine. BACKGROUND

[0002] The washing machine is a cleaning electric appliance which uses electric energy to produce mechanical action to wash clothes. As a cleaning electric appliance which replaces manual washing of clothes, the washing machine is widely used due to its high efficiency and good washing effect. At present, the washing machine basically washes clothes by water. In order to avoid water overflow (i.e. water overflow caused by excessive water addition), it is necessary to detect the liquid level in the washing drum of the washing machine.

[0003] In the prior art, the detection of the liquid level in the washing drum of the washing machine is easily affected by external air pressure, temperature and liquid composition, and has the problem of inaccurate detection. For example, the washing machine detects the liquid level in the washing drum by using a capacitive liquid level sensor. The detection principle of the capacitive liquid level sensor is to detect the water pressure in the washing drum. The water pressure drives the position of the magnetic core in the coil in the indirect capacitive liquid level sensor to change, thereby changing the inductance. Different frequency signals are generated by the LC oscillation circuit. The liquid level in the washing drum is determined according to the corresponding relationship between the frequency signal value and the liquid level. Since the water pressure is affected by external temperature, air pressure and liquid composition, the washing machine detects the liquid level in the washing drum by using the capacitive liquid level sensor, which has the problem of inaccurate detection. SUMMARY

[0004] Therefore, the present application aims to provide a water level detection device and a pulsator washing machine to solve or partially solve the problem that the detection of the liquid level in the washing drum of the existing washing machine is easily affected by external air pressure, temperature and liquid composition, and has the problem of inaccurate detection.

[0005] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows:

[0006] In a first aspect, the present application provides a water level detection device. The water level detection device is used in a washing machine. The washing machine comprises a device main body and a washing drum. The water level detection device comprises a communication pipeline, a magnetic floating ball, a magnetic ball, a rotating rod and an angle detection mechanism. The lower end of the communication pipeline is in communication with the lower side of the washing drum, and the magnetic floating ball is arranged in the communication pipeline. One end of the rotating rod is connected with the magnetic ball, and the rotating rod is rotatably connected with the device main body. When the water level detection device is in a working state, the liquid level in the communication pipeline and the liquid level in the washing drum are flush, the magnetic floating ball floats on the liquid surface, the magnetic ball is attracted by the magnetic floating ball and moves with the magnetic floating ball to make the rotating rod rotate, and the angle detection mechanism detects the rotation angle of the rotating rod to obtain the position of the liquid surface.

[0007] Optionally, the rotating rod is a hollow rod structure; the angle detecting mechanism comprises a moving part and a pressure detecting element, the moving part and the pressure detecting element are both arranged in the hollow cavity of the rotating rod, the moving part can freely move in the hollow cavity, and the pressure detecting element is close to the other end of the rotating rod; when the rotating rod rotates, the moving part moves to the other end of the rotating rod and presses the pressure detecting element, and the angle detecting mechanism obtains the position of the liquid surface through the pressure received by the pressure detecting element.

[0008] Optionally, the water level detecting device comprises a plurality of moving parts.

[0009] Optionally, when the rotating rod does not rotate, the other end of the rotating rod is higher than one end of the rotating rod, or the other end of the rotating rod is flush with one end of the rotating rod.

[0010] Optionally, the moving part is a sphere.

[0011] Optionally, the angle detecting mechanism comprises a light generator and a light sensitive element, one of the light generator and the light sensitive element is above the other end of the rotating rod, the other of the light generator and the light sensitive element is below the other end of the rotating rod, and the light generator and the light sensitive element have a light channel therebetween; when the rotating rod rotates, the area of the light channel blocked by the rotating rod changes, and the angle detecting mechanism obtains the position of the liquid surface through the area change of the light channel.

[0012] Optionally, the rotating rod and the axis of the washing tub are in the same plane, one end of the rotating rod is close to the washing tub, and the other end of the rotating rod is away from the washing tub.

[0013] Optionally, the communication pipeline is vertically arranged.

[0014] Optionally, the water level detecting device further comprises a rotating mechanism, and the rotating mechanism is connected between the rotating rod and the device body.

[0015] In the second aspect, the embodiment of the present application further provides a pulsator washing machine, which comprises a device body, a washing tub and the above-mentioned water level detecting device, and the washing tub and the water level detecting device are both arranged in the device body.

[0016] Optionally, the side wall of the washing tub is provided with the communication pipeline of the water level detecting device.

[0017] Compared with the prior art, the water level detecting device has the following advantages:

[0018] The present invention discloses a water level detection device. When the water level detection device is in operation, the liquid level in the connecting pipe is aligned with the liquid level in the washing tub, a magnetic float floats on the liquid surface, and the magnetic ball is attracted by the magnetic float and moves with the magnetic float, causing a rotating rod to rotate. An angle detection mechanism detects the rotation angle of the rotating rod to obtain the position of the liquid surface. Because the magnetic float floats on the liquid surface due to buoyancy and is not affected by external air pressure, temperature, or liquid composition, and the magnetic ball is attracted by the magnetic float and moves up and down with the magnetic float, causing the rotating rod to rotate, the rotation angle of the rotating rod can accurately reflect the liquid level in the connecting pipe. Therefore, the angle detection mechanism detects the rotation angle of the rotating rod to obtain the position of the liquid surface in the connecting pipe with relative accuracy. In summary, the water level detection device of the embodiment of the present application is not affected by external air pressure, temperature, or liquid composition, has the advantage of accurate liquid level detection, and can accurately detect the process change value of the liquid level in the connecting pipe. Because the liquid surface in the connecting pipe is aligned with the liquid surface in the washing tub, the water level detection device can accurately detect the liquid level in the washing tub and accurately detect the process change value of the liquid level in the washing tub.

[0019] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are specifically listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for describing the embodiments.

[0021] Figure 1 This is a schematic structural diagram of a water level detection device according to an embodiment of the present invention;

[0022] Figure 2 This is a structural schematic diagram of the water level detection device in use according to one embodiment of the present invention;

[0023] Figure 3 This is a schematic structural diagram of a rotating rod according to an embodiment of the present invention;

[0024] Figure 4 for Figure 2 Schematic diagram of mechanical analysis of the enlarged view of part A;

[0025] Figure 5 This is a schematic structural diagram of a water level detection device according to another embodiment of the present invention;

[0026] Figure 6 This is a structural schematic diagram of the water level detection device in use according to another embodiment of the present invention.

[0027] Reference Signs List:

[0028] 1 - outer tub; 2 - communication pipe; 3 - magnetic floating ball; 4 - magnetic ball; 5 - rotating rod; 51 - hollow cavity; 6 - rotating mechanism; 7 - moving part; 8 - pressure detecting element; 9 - ball; 10 - light generator; 11 - light sensitive sensing element; 12 - light channel; 13 - inner tub; 14 - pulsator; 15 - liquid surface; 16 - device main body. DETAILED DESCRIPTION

[0029] Exemplary embodiments of the present application will be described herein below with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it is to be understood that the present application can be embodied in various forms without being limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present application to those skilled in the art.

[0030] The present application provides a water level detecting device, referring to Figure 1 which shows a structure schematic diagram of a water level detecting device according to an embodiment of the present application, the water level detecting device is used in a washing machine, and is used for detecting the liquid level in a washing tub of the washing machine. The washing machine includes a device main body 16 and the washing tub, and the washing tub has liquid therein when the washing machine is in a working state, the liquid generally refers to water, and clothes are placed in the washing tub, and the washing tub rotates to wash the clothes.

[0031] Referring to Figure 1 , the water level detecting device includes a communication pipe 2, a magnetic floating ball 3, a magnetic ball 4, a rotating rod 5 and an angle detecting mechanism; the lower end of the communication pipe 2 is communicated with the lower side of the washing tub, and the magnetic floating ball 3 is arranged in the communication pipe 2; one end of the rotating rod 5 is connected with the magnetic ball 4, and the rotating rod 5 is rotatably connected with the device main body 16; when the water level detecting device is in a working state, the liquid level in the communication pipe 2 is flush with the liquid level in the washing tub, the magnetic floating ball 3 floats on the liquid surface 15, the magnetic ball 4 is attracted by the magnetic floating ball 3 and moves with the magnetic floating ball 3 to rotate the rotating rod 5, and the angle detecting mechanism detects the rotation angle of the rotating rod 5 to obtain the position of the liquid surface 15.

[0032] The lower end of the communication pipe 2 is communicated with the lower side of the washing tub to form a U-shaped pipe joint structure, the liquid surface 15 in the communication pipe 2 is flush with the liquid surface 15 in the washing tub, the magnetic floating ball 3 is arranged in the communication pipe 2, the magnetic floating ball 3 floats on the liquid surface 15 when subjected to the liquid buoyancy, the magnetic floating ball 3 floats up and down with the change of the liquid level, the magnetic floating ball 3 magnetically attracts the magnetic ball 4, and the magnetic ball 4 moves up and down with the magnetic floating ball 3; the magnetic floating ball 3 always magnetically attracts the magnetic ball 4, and the magnetic floating ball 3 always lies in the same horizontal plane with the magnetic ball 4.

[0033] The rotating rod 5 is rotatably connected to the device body 16, and one end of the rotating rod is connected to the magnetic ball 4. When the magnetic ball 4 moves up and down with the change of the liquid level along with the magnetic float 3, the magnetic ball 4 drives the rotating rod 5 to rotate around the rotation center of the rotating rod 5. Figure 1 and Figure 2 , the rotating rod 5 is Figure 1 Position rotated to Figure 2 position, the rotating rod 5 rotates counterclockwise around the rotation center of the rotating rod 5.

[0034] In the water level detection device of the embodiment of the present application, when in operation, the liquid level in the connecting pipe 2 is aligned with the liquid level in the washing tub, the magnetic float 3 floats on the liquid surface 15, and the magnetic ball 4 is attracted by the magnetic float 3 and moves with the magnetic float 3, causing the rotating rod 5 to rotate. The angle detection mechanism detects the rotation angle of the rotating rod 5 to obtain the position of the liquid surface 15. Because the magnetic float 3 floats on the liquid surface 15 due to buoyancy and is not affected by external air pressure, temperature, or liquid composition, the magnetic ball 4 is attracted by the magnetic float 3 and moves up and down with the magnetic float 3, causing the rotating rod 5 to rotate. The rotation angle of the rotating rod 5 can accurately reflect the liquid level in the connecting pipe 2. Therefore, the angle detection mechanism detects the rotation angle of the rotating rod 5 to obtain the position of the liquid surface 15 in the connecting pipe 2 with relatively high accuracy. In summary, the water level detection device of the embodiment of the present application is not affected by external air pressure, temperature, or liquid composition, has the advantage of accurate liquid level detection, and can accurately detect the process change value of the liquid level in the connecting pipe 2. Since the liquid surface 15 in the communicating pipe 2 is flush with the liquid surface 15 in the washing tub, the water level detection device can accurately detect the liquid level in the washing tub and precisely detect the process change value of the liquid level in the washing tub.

[0035] Optionally, in one embodiment, referring to Figure 1 and Figure 2 As shown, the rotating rod 5 is a hollow rod-shaped structure; the angle detection mechanism includes a moving part 7 and a pressure detection element 8, both of which are arranged in the hollow cavity 51 of the rotating rod 5, and the moving part 7 can move freely in the hollow cavity 51, and the pressure detection element 8 is close to the other end of the rotating rod 5; when the rotating rod 5 rotates, the moving part 7 moves toward the other end of the rotating rod 5 and presses down the pressure detection element 8, and the angle detection mechanism obtains the position of the liquid surface 15 through the pressure exerted on the pressure detection element 8.

[0036] The water level detection device of the embodiment of the present application, when the water level detection device is in the working state, the washing tub and the communication pipeline 2 both have liquid, the magnetic floating ball 3 floats on the liquid surface 15, the magnetic ball 4 is attracted to the magnetic floating ball 3 and is close to the magnetic floating ball 3, the magnetic ball 4 moves with the magnetic floating ball 3 to make one end of the rotating rod 5 move upward, and the other end of the rotating rod 5 moves downward. At this time, the moving piece 7 in the hollow cavity 51 of the rotating rod 5 moves to the other end of the rotating rod 5 due to the action of gravity, the moving piece 7 presses the pressure detection element 8, the angle detection mechanism can obtain the rotation angle of the rotating rod 5 through the pressure received by the pressure detection element 8, and can obtain the position of the liquid surface 15 according to the rotation angle of the rotating rod 5.

[0037] The structure of the pressure detection element 8 is not specifically limited in the embodiment of the present application, for example, the pressure detection element 8 is a pressure sensor.

[0038] Optionally, the angle detection mechanism further comprises a controller electrically connected with the pressure detection element 8, the controller is used for receiving the pressure signal received by the pressure detection element 8, and calculating the rotation angle of the rotating rod 5 and the position of the liquid surface 15 according to the pressure signal.

[0039] Optionally, referring to Figure 3 , the water level detection device comprises a plurality of moving pieces 7. In the case that the rotating rod 5 rotates, the pressure of the plurality of moving pieces 7 pressing the pressure detection element 8 is larger and the pressure change value is larger, and the pressure of the moving piece 7 pressing the pressure detection element 8 is smaller and the pressure change value is smaller, the water level detection device comprising a plurality of moving pieces 7 can improve the accuracy of the angle detection mechanism obtaining the position of the liquid surface 15 through the pressure received by the pressure detection element 8, and can accurately detect the process change value of the liquid level in the communication pipeline 2.

[0040] Referring to Figure 4 , a mechanical analysis schematic diagram of the rotating rod 5 provided with a plurality of moving pieces 7 is shown. A plurality of moving pieces 7 are arranged in the hollow cavity 51 of the rotating rod 5, when the rotating rod 5 rotates, one end of the rotating rod 5 moves upward, and the other end of the rotating rod 5 moves downward; the plurality of moving pieces 7 move to the other end of the rotating rod 5 and are stacked together. Knowing the mass of the plurality of moving pieces 7, the gravity mg of the plurality of moving pieces 7 can be calculated, the component force of the gravity of the plurality of moving pieces 7 along the direction of the rotating rod 5 acts on the pressure detection element 8, according to the gravity of the plurality of moving pieces 7, the pressure detected by the pressure detection element 8 and the Pythagorean theorem, the angle θ between the rotating rod 5 and the vertical direction can be calculated, and the calculation formula is mgcosθ=F1. According to the angle θ between the rotating rod 5 and the vertical direction, and the setting position, length and the like of the rotating rod 5, the position of the liquid surface 15 can be calculated.

[0041] It is understood that there are various ways to calculate the position of the liquid surface 15 based on the angle θ between the rotating rod 5 and the vertical direction, as well as the location and length of the rotating rod 5, and the present embodiment does not specifically limit this. For example, given the distance L between the magnetic ball 4 and the rotation center of the rotating rod 5, using the Pythagorean theorem, Lcosθ is the height to which the magnetic ball 4 moves upward. The height to which the magnetic ball 4 moves upward is the height to which the magnetic float 3 moves upward. The height to which the magnetic float 3 moves upward can reflect the position of the liquid surface 15 in the connecting pipe 2.

[0042] Optional, see Figure 1 As shown, when the rotating rod 5 is not rotating, the other end of the rotating rod 5 is higher than one end of the rotating rod 5, or the other end of the rotating rod 5 is flush with one end of the rotating rod 5. This prevents the moving member 7 from pressing down on the pressure detecting element 8 when the rotating rod 5 is not rotating, thereby reducing the life of the pressure detecting element 8 and the accuracy of liquid level detection.

[0043] Optional, see Figure 3 As shown, the moving member 7 is a sphere 9. The friction force of the sphere 9 moving freely in the hollow cavity 51 is relatively small. The moving member 7 is a sphere 9, which can make the sensitivity of the angle detection mechanism higher.

[0044] Optionally, the diameter of the hollow cavity 51 of the rotating rod 5 is slightly larger than the diameter of the sphere 9 , and only one sphere 9 can be set in the diameter direction of the hollow cavity 51 , and multiple spheres 9 are arranged in a row in the length direction of the hollow cavity 51 .

[0045] In the embodiment of the present application, there is no specific limit on the number of spheres 9 provided; it can be sufficient to meet the requirements of use. However, the spheres 9 cannot completely fill the hollow cavity 51, and a certain amount of space is required for the spheres 9 to move. When the rotating rod 5 is not rotating, the spheres 9 cannot press against the pressure detection element 8 to ensure the accuracy of the pressure detection element 8.

[0046] When the water level detection device of the embodiment of the present application is in operation, the liquid level in the washing tub and the connecting pipe 2 will change, and the magnetic float 3 will float up and down as the liquid level changes. The magnetic float 3 will attract the magnetic ball 4, causing the magnetic ball 4 to move up and down together with the magnetic float 3. The up and down movement of the magnetic ball 4 drives the rotating rod 5 to rotate around the rotation center of the rotating rod 5. The up and down movement of the magnetic ball 4 causes the rotation angle of the rotating rod 5 to change. According to the liquid level change in the connecting pipe 2, the present application realizes the angle change of the rotating rod 5 and the change of the gravity component of the sphere 9 in the rotating rod 5 acting on the pressure detection element 8 through the magnetic force transmission between the magnetic float 3 and the magnetic ball 4. The liquid level detection can be realized by the formula mgcosθ=F1.

[0047] In one embodiment, referring to Figure 1As shown, in the case that the water level detecting device is in the initial state, there is no liquid in the washing tub and the communication pipe 2, the magnetic floating ball 3 is at the lowermost end of the communication pipe 2, and the rotating rod 5 is almost horizontally arranged. The ball 9 is freely located in the hollow cavity 51 and does not press the pressure detecting element 8.

[0048] With reference to Figure 2 As shown, in the case that the water level detecting device is in the working state, there is liquid in the washing tub and the communication pipe 2, the magnetic floating ball 3 is upwardly moved by the liquid buoyancy, the magnetic floating ball 3 magnetically attracts the magnetic ball 4 to move upwardly together with the magnetic floating ball 3, one end of the rotating rod 5 is upwardly moved, the other end of the rotating rod 5 is downwardly moved, the ball 9 located in the hollow cavity 51 of the rotating rod 5 is moved to the other end of the rotating rod 5 due to the gravity, the ball 9 presses the pressure detecting element 8, the angle detecting mechanism can obtain the rotating angle of the rotating rod 5 through the pressure received by the pressure detecting element 8, and can obtain the position of the liquid surface 15 according to the rotating angle of the rotating rod 5.

[0049] Optionally, in another embodiment, the angle detecting mechanism comprises a light generator 10 and a light sensitive sensing element 11, one of the light generator 10 and the light sensitive sensing element 11 is located above the other end of the rotating rod 5, the other of the light generator 10 and the light sensitive sensing element 11 is located below the other end of the rotating rod 5, and the light generator 10 and the light sensitive sensing element 11 have a light passage 12 therebetween; in the case that the rotating rod 5 is rotated, the area of the light passage 12 blocked by the rotating rod 5 changes, and the angle detecting mechanism can obtain the position of the liquid surface 15 through the area change of the light passage 12.

[0050] Specifically, the light generator 10 is used to generate light, and the light sensitive sensing element 11 can sense the light intensity. The light generated by the light generator 10 is directed to the light sensitive sensing element 11, and the light generator 10 and the light sensitive sensing element 11 have the light passage 12 therebetween. When the cross-sectional area of the light passage 12 changes, the light intensity of the light directed to the light sensitive sensing element 11 by the light generator 10 is affected, and the angle detecting mechanism can obtain the rotating angle of the rotating rod 5 through the change of the light intensity, and further obtain the liquid level of the communication pipe 2 and the liquid level change value in the communication pipe 2.

[0051] The structure of the light sensitive sensing element 11 is not specifically limited in the embodiment of the application, for example, the light sensitive sensing element 11 is a light sensitive sensor.

[0052] In the working state of the water level detection device, the liquid level in the washing tub and the communication pipeline 2 changes, the magnetic float ball 3 floats up and down with the change of the liquid level, the magnetic float ball 3 magnetically attracts the magnetic ball 4, so that the magnetic ball 4 moves up and down with the magnetic float ball 3, the magnetic ball 4 moves up and down to drive the rotating rod 5 to rotate around the rotating center of the rotating rod 5, and the rotating angle of the rotating rod 5 changes. When the rotating angle of the rotating rod 5 changes, the area of the rotating rod 5 shielding the light channel 12 changes, the angle detection mechanism obtains the rotating angle of the rotating rod 5 through the area change of the light channel 12, and the position of the liquid surface 15 can be obtained according to the rotating angle of the rotating rod 5.

[0053] In another embodiment, referring to FIG. 2, in the initial state of the water level detection device, there is no liquid in the washing tub and the communication pipeline 2, the magnetic float ball 3 is located at the lowermost end of the communication pipeline 2, and the rotating rod 5 is almost horizontally arranged. The other end of the rotating rod 5 completely shields the light channel 12, and the photosensitive sensing element 11 cannot receive the light generated by the light generator 10. Figure 5 Referring to FIG. 3, in the working state of the water level detection device, the washing tub and the communication pipeline 2 are both provided with liquid, the magnetic float ball 3 is moved upward by the liquid buoyancy, the magnetic float ball 3 magnetically attracts the magnetic ball 4 to move upward together with the magnetic float ball 3, one end of the rotating rod 5 moves upward, the other end of the rotating rod 5 moves downward, the other end of the rotating rod 5 reduces the shielding area of the light channel 12, and the photosensitive sensing element 11 can receive the light generated by the light generator 10. The rotating angle of the rotating rod 5 changes when the magnetic ball 4 moves up and down, the photosensitive sensing element 11 receives the change of the light intensity, and the angle detection mechanism can obtain the rotating angle of the rotating rod 5 through the change of the light intensity, and further obtain the liquid level of the communication pipeline 2 and the change value of the liquid level in the communication pipeline 2.

[0054] Figure 6 Optionally, the angle detection mechanism further includes a controller electrically connected with the light generator 10 and the photosensitive sensing element 11, the controller is configured to control the light generator 10 to generate light, receive the light intensity signal of the photosensitive sensing element 11, calculate the rotating angle of the rotating rod 5 according to the light intensity signal, and obtain the position of the liquid surface 15.

[0055] Optionally, referring to FIG. 4, the rotating rod 5 and the axis of the washing tub are located in the same plane, one end of the rotating rod 5 is close to the washing tub, and the other end of the rotating rod 5 is away from the washing tub.

[0056] Optionally, referring to FIG. 5, the rotating rod 5 is arranged on the side wall of the washing tub, and the other end of the rotating rod 5 is away from the washing tub. Figure 1 Optionally, referring to FIG. 6, the rotating rod 5 is arranged on the side wall of the washing tub, and one end of the rotating rod 5 is close to the washing tub.

[0057] Figure 1 ​​As shown, the communication pipeline 2 is vertically arranged, and the above structure of the embodiment can reduce the amount of liquid in the communication pipeline 2. The communication pipeline 2 is vertically arranged, the magnetic floating ball 3 floats up and down under the buoyancy, and the magnetic floating ball 3 will not be subjected to resistance during the floating process, and the floating path of the magnetic floating ball 3 is the shortest. Therefore, the vertical arrangement of the communication pipeline 2 can improve the sensitivity of the water level detection device.

[0058] Optionally, the water level detection device further comprises a rotating mechanism 6 connected between the rotating rod 5 and the device main body 16, the rotating mechanism 6 serves to fix the rotating rod 5 and rotatably connects the rotating rod 5 and the device main body 16.

[0059] The embodiment of the present application does not specifically limit the rotating mechanism 6, for example, the rotating mechanism 6 comprises a bearing and a connecting rod, the outer ring of the bearing is connected with the rotating rod 5, the inner ring of the bearing is connected with the connecting rod, and the connecting rod is connected with the device main body 16.

[0060] In the working state of the water level detection device of the embodiment of the present application, the liquid level in the washing tub and the communication pipeline 2 changes, the magnetic floating ball 3 floats up in the communication pipeline 2 under the action of the liquid buoyancy, the magnetic floating ball 3 attracts the magnetic ball 4 to move upward under the action of the magnetic force, and the upward and downward movement of the magnetic ball 4 causes the rotating rod 5 to rotate counterclockwise with the rotating point as the center. Since the magnetic floating ball 3 floats on the liquid surface 15 under the buoyancy and is not affected by the external air pressure, temperature, and liquid composition, the angle of rotation of the rotating rod 5 caused by the upward and downward movement of the magnetic ball 4 attracted by the magnetic floating ball 3 can accurately reflect the liquid level in the communication pipeline 2, that is, the angle of rotation of the rotating rod 5 can accurately reflect the liquid level in the washing tub. Therefore, the angle detection mechanism can accurately detect the liquid level in the washing tub and accurately detect the change value of the liquid level in the communication pipeline 2.

[0061] In an embodiment of the present application, referring to Figure 1 and Figure 2 As shown, when the magnetic ball 4 is attracted by the magnetic floating ball 3 to move upward and downward with the magnetic floating ball 3 to rotate the rotating rod 5, one end of the rotating rod 5 moves upward, the other end of the rotating rod 5 moves downward, the ball 9 rolls to the other end of the rotating rod 5 to press the pressure detection element 8, the rotating angle of the rotating rod 5 is different, and the gravity component of the ball 9 acting on the pressure detection element 8 changes. The angle detection mechanism can obtain the rotating angle of the rotating rod 5 through the pressure received by the pressure detection element 8, and can obtain the position of the liquid surface 15 according to the rotating angle of the rotating rod 5. The water level detection device can accurately detect the liquid level and accurately detect the change value of the liquid level in the communication pipeline 2.

[0062] In another embodiment of the present application, referring to Figure 5 and Figure 6As shown, when the magnetic ball 4 is attracted by the magnetic floating ball 3 to move up and down with the magnetic floating ball 3, the rotating rod 5 rotates, one end of the rotating rod 5 moves upward, the other end of the rotating rod 5 moves downward, the area of the light channel 12 blocked by the other end of the rotating rod 5 changes, the angle detection mechanism obtains the rotation angle of the rotating rod 5 through the area change of the light channel 12, and the position of the liquid surface 15 can be obtained according to the rotation angle of the rotating rod 5. The water level detection device can accurately detect the liquid level, and can accurately detect the change value of the liquid level in the communication pipeline 2.

[0063] The embodiment of the present application also provides a pulsator washing machine, which comprises a device main body 16, a washing tub and the above-mentioned water level detection device, and the washing tub and the water level detection device are both arranged in the device main body 16. In a use state, the liquid level in the washing tub of the pulsator washing machine is relatively high, the rotation angle of the rotating rod 5 is relatively large, and the water level detection device is relatively accurate in measuring the liquid level in the pulsator washing machine.

[0064] The device main body 16 is the main structure of the pulsator washing machine, and the device main body 16 comprises a containing cavity, and the washing tub and the water level detection device are both arranged in the containing cavity of the device main body 16.

[0065] Optionally, the side wall of the washing tub is provided with the communication pipeline 2 of the water level detection device.

[0066] Reference Figure 1 As shown, the washing tub comprises an outer tub 1 and an inner tub 13, the outer tub 1 is sleeved outside the inner tub 13, the outer tub 1 refers to the outer tub body of the washing machine, and the outer tub 1 and the inner tub 13 have a certain distance, and the outer tub 1 and the communication pipeline 2 can be an integral structure. The outer tub 1 protects the inner tub 13 and prevents the inner tub 13 from being broken due to excessive stress during use. In a working state of the pulsator washing machine, the inner tub 13 and the outer tub 1 both have liquid, clothes are placed in the inner tub 13, and the inner tub 13 and the pulsator 14 rotate to wash the clothes.

[0067] In another embodiment, the water level detection device further comprises a connecting pipe, one end of the connecting pipe is connected with the lower end of the communication pipeline 2, the other end of the connecting pipe is connected with the lower side of the outer tub 1, and the connecting pipe is connected between the communication pipeline 2 and the outer tub 1, so that the communication pipeline 2 and the outer tub 1 form a U-shaped pipe structure.

[0068] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other present or future devices possess. That is, although specific embodiments have been disclosed herein, one of ordinary skill in the art will appreciate that other embodiments can be practiced under the teachings of the present application without departing from the true spirit and scope of the present application. Therefore, claims based on the disclosure as provided herein are contemplated as falling within the scope of the present application. In general, statements that quantify dimensions and shapes are intended to be approximate, unless otherwise stated. Dimensions and shapes are thus not intended to be limiting, unless otherwise stated. In addition, it is contemplated that any optional feature of the inventive variations described can be set forth and claimed independently, or in combination with any one or more of the features described herein.

[0069] Each of the embodiments described in this specification has been presented in a related manner, and the same or similar parts of each of the embodiments can be referred to each other. Each of the embodiments focuses on the difference from other embodiments. For embodiments of an apparatus, an electronic device, a computer-readable storage medium, and a computer program product including instructions, since they are substantially similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the part of the method embodiments.

[0070] The above only describes the preferred embodiments of the present application, and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application is included in the protection scope of the present application.

Claims

1. A water level detection device for a washing machine, comprising a main body (16) and a washing tub; characterized in that: The water level detection device comprises a connecting pipe (2), a magnetic float (3), a magnetic ball (4), a rotating rod (5) and an angle detection mechanism; The lower end of the communication pipe (2) is connected to the lower side of the washing tub, and the magnetic float (3) is arranged in the communication pipe (2); One end of the rotating rod (5) is connected to the magnetic ball (4), and the rotating rod (5) is rotatably connected to the device body (16); When the water level detection device is in a working state, the liquid level in the communicating pipe (2) is flush with the liquid level in the washing tub, the magnetic float (3) floats on the liquid surface (15), the magnetic ball (4) is attracted by the magnetic float (3) and moves with the magnetic float (3), causing the rotating rod (5) to rotate, and the angle detection mechanism detects the rotation angle of the rotating rod (5) to obtain the position of the liquid surface (15).

2. The water level detection device according to claim 1, characterized in that: The rotating rod (5) is a hollow rod-shaped structure; the angle detection mechanism comprises a moving part (7) and a pressure detection element (8); the moving part (7) and the pressure detection element (8) are both arranged in a hollow cavity (51) of the rotating rod (5); the moving part (7) can move freely in the hollow cavity (51); and the pressure detection element (8) is close to the other end of the rotating rod (5); When the rotating rod (5) rotates, the moving member (7) moves toward the other end of the rotating rod (5) and presses down the pressure detection element (8), and the angle detection mechanism obtains the position of the liquid surface (15) through the pressure applied to the pressure detection element (8).

3. The water level detection device according to claim 2, characterized in that: The water level detection device comprises a plurality of moving parts (7).

4. The water level detection device according to claim 3, characterized in that: When the rotating rod (5) is not rotated, the other end of the rotating rod (5) is higher than one end of the rotating rod (5), or the other end of the rotating rod (5) is flush with one end of the rotating rod (5).

5. The water level detection device according to claim 2, characterized in that: The moving part (7) is a sphere (9).

6. The water level detection device according to claim 1, characterized in that: The angle detection mechanism comprises a light generator (10) and a light sensitive element (11), one of the light generator (10) and the light sensitive element (11) is located above the other end of the rotating rod (5), and the other of the light generator (10) and the light sensitive element (11) is located below the other end of the rotating rod (5), and a light channel (12) is provided between the light generator (10) and the light sensitive element (11); When the rotating rod (5) rotates, the area of ​​the light channel (12) blocked by the rotating rod (5) changes, and the angle detection mechanism obtains the position of the liquid surface (15) through the area change of the light channel (12).

7. The water level detection device according to claim 1, characterized in that: The rotating rod (5) and the axis of the washing bucket are located in the same plane, one end of the rotating rod (5) is close to the washing bucket, and the other end of the rotating rod (5) is far away from the washing bucket.

8. The water level detection device according to claim 1, characterized in that: The communicating pipe (2) is arranged vertically.

9. The water level detection device according to claim 1, characterized in that: The water level detection device further comprises a rotating mechanism (6), and the rotating mechanism (6) is connected between the rotating rod (5) and the device body (16).

10. A pulsator washing machine, characterized in that: The invention comprises an equipment body (16), a washing tub and a water level detection device according to any one of claims 1 to 9, wherein the washing tub and the water level detection device are both arranged in the equipment body (16).

11. The pulsator washing machine according to claim 10, characterized in that: A communication pipe (2) of the water level detection device is provided on the side wall of the washing tub.

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