阅读说明：本技术 一种洗衣机及浑浊度检测方法 (Washing machine and turbidity detection method ) 是由 赵志强 吕佩师 许升 于 2018-09-05 设计创作，主要内容包括：本发明公开了一种洗衣机,包括盛水桶,该洗衣机内设有石英晶体微天平传感器,以用于对盛水桶内的洗涤水进行浑浊度检测。本发明还公开了一种如上所述的洗衣机的浑浊度检测方法,石英晶体微天平传感器在衣物洗涤过程中对洗涤水进行浑浊度检测,当洗涤水浑浊度达到设定值,洗衣机判定衣物洗涤干净。本发明通过在洗衣机内设置石英晶体微天平传感器,采用石英晶体的压电效应对洗衣机内的洗涤水进行浑浊度检测,洗衣机根据所检测到的浑浊度来控制洗涤程序,从而达到节约资源的目的,并且可以精准判定衣物的洁净度。(The invention discloses a washing machine, which comprises a water containing barrel, wherein a quartz crystal microbalance sensor is arranged in the washing machine and is used for carrying out turbidity detection on washing water in the water containing barrel. The invention also discloses a turbidity detection method of the washing machine, the quartz crystal microbalance sensor is used for carrying out turbidity detection on the washing water in the washing process of the clothes, and when the turbidity of the washing water reaches a set value, the washing machine judges that the clothes are washed clean. According to the invention, the quartz crystal microbalance sensor is arranged in the washing machine, the piezoelectric effect of the quartz crystal is adopted to detect the turbidity of the washing water in the washing machine, and the washing machine controls the washing program according to the detected turbidity, so that the purpose of saving resources is achieved, and the cleanliness of clothes can be accurately judged.)

1. A washing machine comprises a water bucket and is characterized in that a quartz crystal microbalance sensor is arranged in the washing machine and used for carrying out turbidity detection on washing water in the water bucket.

2. The washing machine as claimed in claim 1, wherein the quartz crystal microbalance sensor is disposed at a bottom of the tub, and the quartz crystal microbalance sensor is disposed in contact with the washing water to perform turbidity detection of the washing water in the tub and the residue at the bottom of the tub;

preferably, the tub is provided at a bottom thereof with a drain port for draining the wash water to the outside, and the quartz crystal microbalance sensor is disposed near the drain port of the tub.

3. The washing machine as claimed in claim 2, wherein the quartz crystal microbalance sensor performs turbidity detection on the washing water by using a piezoelectric effect, and comprises a quartz crystal oscillating piece, an oscillating circuit and a packaging shell, wherein the quartz crystal oscillating piece is arranged in the packaging shell, electrodes are arranged on two corresponding surfaces of the quartz crystal oscillating piece, and the quartz crystal oscillating piece is connected with the oscillating circuit through the electrodes.

4. A washing machine as claimed in claim 3, wherein the quartz crystal oscillating piece is AT cut, and two corresponding faces of the quartz crystal oscillating piece are coated with silver layers to form electrodes, each electrode being provided with a lead for connection to the oscillating circuit.

5. A washing machine as claimed in any one of claims 1 to 4 wherein a plurality of quartz crystal microbalance sensors are provided;

preferably, the bottom of the water bucket is provided with a plurality of quartz crystal microbalance sensors;

preferably, quartz crystal microbalance sensors are arranged on the walls of the water containing barrels at all heights; a circle of quartz crystal microbalance sensors are uniformly distributed on the wall of the water containing barrel with the same height.

6. A turbidity detecting method for a washing machine according to any one of claims 1 to 5, wherein the quartz crystal microbalance sensor detects the turbidity of the washing water during the washing of the laundry, and the washing machine determines that the laundry is washed clean when the turbidity of the washing water reaches a set value.

7. The turbidity detecting method for the washing machine according to claim 6, wherein the quartz crystal microbalance sensor detects the turbidity of the washing water during the washing process of the laundry, and when the turbidity of the washing water reaches a set value, the quartz crystal microbalance sensor sends a signal to a controller of the washing machine, and the controller receives the signal to determine that the laundry is washed clean.

8. The turbidity detecting method for the washing machine as claimed in claim 6, wherein the quartz crystal microbalance sensor detects the turbidity of the washing water during the washing process, and the controller of the washing machine collects the detected turbidity and analyzes the turbidity, and when the turbidity reaches a set value, the controller determines that the clothes are washed clean.

9. The turbidity detection method of the washing machine according to claim 7 or 8, wherein the quartz crystal microbalance sensor detects the turbidity of the washing water in real time during the washing process of the clothes, if the turbidity reaches a set value, the controller determines that the clothes are washed clean, controls the washing machine to stop washing, executes the next program, and if the turbidity does not reach the set value, the controller controls the washing machine to continue washing;

and/or the quartz crystal microbalance sensor detects the turbidity of the washing water after the washing is finished, if the turbidity reaches a set value, the controller judges that the clothes are washed clean, controls the washing machine to stop washing, executes the next program, and if the turbidity does not reach the set value, the controller controls the washing machine to continue washing; the number of washing times corresponds to the number of turbidity detections when the set value is reached.

10. A turbidity detecting method in a washing machine according to claim 9, wherein the turbidity comprises one or any combination of detergent residue, soil residue, specific stain residue and mold residue.

Technical Field

The invention belongs to the technical field of clothes washing, and particularly relates to a washing machine and a turbidity detection method of the washing machine.

Background

The traditional washing machine controls the washing time of clothes according to the time set by manual setting, if the timing time is too short, the clothes cannot be washed clean by microorganisms such as dirt, mold and bacteria, and meanwhile, a small amount of detergent residues possibly exist in the washed clothes, and the residual detergent can cause certain damage to the skin of a user; if the timing time is too long, the time and the electricity are wasted, and the time for washing the clothes with different dirtiness is different. In order to ensure that clothes are cleaned, a general user sets the washing time to be longer than the time actually needed, so that the phenomenon of water and electricity resource waste is caused, and the waste is particularly serious in China with lots of people and short resources. At present, the washing machine develops towards the direction of intellectualization, a turbidity detection function is added in the washing machine, which is the development trend of a new generation of washing machine, and whether clothes are washed clean in a certain working stage of the washing machine is automatically judged by detecting the turbidity of washing water so as to determine the optimal washing time of the clothes.

Currently, the turbidity of the washing water can be detected according to optical principles. According to beer's law, light is scattered and absorbed while propagating in a solution, and the degree of absorption of light by a solution is related to the solution concentration, the liquid layer thickness, and the wavelength of incident light. When the wavelength of the incident light is determined, the intensity of the light remaining after passing through the solution can be determined by the following formula:

I＝I₀·e-α·c·l

wherein I₀Is the original intensity, I is the intensity after passing through the solution, c is the solution concentration, l is the liquid layer thickness, α is a coefficient independent of concentration.

During the working process of the washing machine, the turbidity of the washing water changes along with time, the turbidity of the washing water is continuously increased in a washing stage, and the turbidity of the washing water does not change any more after clothes are washed clean; in the rinsing stage, the turbidity is lowest when fresh water is added, and the turbidity of the washing water increases as the rinsing progresses, and when the clothes are completely rinsed, the turbidity does not change any more. If the turbidity of the washing water is detected by an optical principle, one beam of light penetrates through the washing water, and the light intensity is detected at the other side, then the light intensity is gradually weakened in the washing and rinsing stages, and when the clothes are washed clean, the light intensity reaches the weakest value and does not change. Therefore, whether the washing and rinsing processes of the clothes are finished or not can be judged by detecting the change of the light intensity, and the washing machine is controlled to stop working after the clothes are cleaned, so that the effect of automatic control can be achieved, the intelligent degree of the washing machine is improved, and water and electricity resources are saved.

However, most of the currently existing washing machine turbidity detection devices for detecting turbidity by detecting light intensity change have the defects of inflexible installation and low precision, and cannot give consideration to both scattered light turbidity and transmitted light turbidity, and cannot truly reflect the real water quality in the water tank.

The present invention has been made in view of this situation.

Disclosure of Invention

The technical problem to be solved by the invention is to overcome the defects of the prior art and provide a washing machine to realize the purpose of accurately detecting the turbidity of washing water.

In order to solve the technical problems, the invention adopts the technical scheme that:

a washing machine comprises a water containing barrel, wherein a quartz crystal microbalance sensor is arranged in the washing machine and used for carrying out turbidity detection on washing water in the water containing barrel.

Further, the quartz crystal microbalance sensor is arranged at the bottom of the water containing barrel and is in contact with the washing water so as to detect turbidity of the washing water in the water containing barrel and residues at the bottom of the water containing barrel.

Preferably, the tub is provided at a bottom thereof with a drain port for draining the wash water to the outside, and the quartz crystal microbalance sensor is disposed near the drain port of the tub.

Furthermore, the quartz crystal microbalance sensor is used for detecting turbidity of washing water by utilizing a piezoelectric effect, and comprises a quartz crystal oscillating piece, an oscillating circuit and a packaging shell, wherein the quartz crystal oscillating piece is arranged in the packaging shell, electrodes are arranged on two corresponding surfaces of the quartz crystal oscillating piece, and the quartz crystal oscillating piece is connected with the oscillating circuit through the electrodes.

Furthermore, the quartz crystal oscillation piece adopts an AT cutting mode, silver layers are coated on two corresponding surfaces of the quartz crystal oscillation piece to form electrodes, and each electrode is provided with a lead wire used for being connected with the oscillation circuit.

Furthermore, a plurality of quartz crystal microbalance sensors are arranged in the washing machine.

Preferably, the bottom of the water barrel is provided with a plurality of quartz crystal microbalance sensors.

Preferably, quartz crystal microbalance sensors are arranged on the walls of the water containing barrels at all heights; a circle of quartz crystal microbalance sensors are uniformly distributed on the wall of the water containing barrel with the same height.

Another objective of the present invention is to provide a turbidity detecting method for a washing machine as described above, wherein the quartz crystal microbalance sensor detects the turbidity of the washing water during the washing process, and when the turbidity of the washing water reaches a set value, the washing machine determines that the clothes are washed clean.

Further, the quartz crystal microbalance sensor detects the turbidity of the washing water in the washing process of the clothes, when the turbidity of the washing water reaches a set value, the quartz crystal microbalance sensor sends a signal to a controller of the washing machine, and the controller receives the signal to judge that the clothes are washed clean.

Furthermore, the quartz crystal microbalance sensor detects the turbidity of the washing water in the washing process of the clothes, and the controller of the washing machine collects the detected turbidity and analyzes the turbidity, and when the turbidity reaches a set value, the controller judges that the clothes are washed clean.

Further, the quartz crystal microbalance sensor detects the turbidity of the washing water in real time in the washing process of the clothes, if the turbidity reaches a set value, the controller judges that the clothes are washed clean, controls the washing machine to stop washing, executes the next program, and if the turbidity does not reach the set value, the controller controls the washing machine to continue washing;

and/or the quartz crystal microbalance sensor detects the turbidity of the washing water after the washing is finished, if the turbidity reaches a set value, the controller judges that the clothes are washed clean, controls the washing machine to stop washing, executes the next program, and if the turbidity does not reach the set value, the controller controls the washing machine to continue washing; the number of washing times corresponds to the number of turbidity detections when the set value is reached.

Further, turbidity includes one or any combination of detergent residue, soil residue, specific stain residue, mold residue.

After the technical scheme is adopted, compared with the prior art, the invention has the following beneficial effects.

The quartz crystal microbalance sensor is arranged in the washing machine, the piezoelectric effect of the quartz crystal is adopted to detect the turbidity of the washing water in the washing machine, and the washing machine controls the washing procedure according to the detected turbidity, so that the purpose of saving resources is achieved, and the cleanliness of clothes can be accurately judged.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

fig. 1 is a sectional view of a washing machine in an embodiment of the present invention.

In the figure: 100-washing machine, 1-door cover, 2-balance ring, 3-thread scrap filter, 4-water bucket, 5-washing bucket, 6-rotating wheel, 7-transmission shaft, 8-motor, 9-drain valve, 10-drain pipe and 11-quartz crystal microbalance sensor.

It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1, the embodiment of the present invention introduces a washing machine 100, which includes a cabinet having an opening, and a tub 4 disposed in the cabinet, wherein a door 1 for closing the opening is disposed at the opening of the cabinet, and a user puts laundry into the tub 4 through the opening by opening the door 1; a washing tub 5 for containing and washing laundry and a motor 8 for driving the washing tub 5 to rotate are provided in the water tub 4, and a balance ring 2 for keeping the washing machine 100 in dynamic balance is provided above the washing tub 5.

In the embodiment of the present invention, the washing machine 100 is provided therein with a quartz crystal microbalance sensor 11, and the quartz crystal microbalance sensor 11 is used for detecting turbidity of the washing water in the water tub 4. The quartz crystal microbalance sensor is arranged in the washing machine, the piezoelectric effect of the quartz crystal is adopted to detect the turbidity of the washing water in the washing machine, and the washing machine controls the washing procedure according to the detected turbidity, so that the purpose of saving resources is achieved, and the cleanliness of clothes can be accurately judged.

In the embodiment of the present invention, the washing machine 100 is a pulsator washing machine with a vertical axis, the washing tub 5 is further provided with a stirring component such as a pulsator 6 for stirring and rotating washing water flow, the pulsator 6 is connected to the motor 8 through a transmission shaft 7, so as to drive the pulsator 6 and/or the washing tub 5 to rotate under the driving of the motor 8, so as to drive the water flow in the washing tub 5 to wash the laundry, or drive the laundry to rotate at a high speed for dehydration treatment, and the washing machine 100 may be any other washing machine, such as a drum washing machine and a duplex washing machine.

In the embodiment of the invention, a plurality of dewatering holes which are uniformly distributed are arranged on the washing barrel 5, a drain pipe 10 for draining water to the outside of the box body is arranged at the bottom of the water containing barrel 4, and the drain pipe 10 is controlled to be opened and closed through a drain valve 9; the washing tub 5 is further provided with a thread scrap filter 3 for filtering foreign materials such as thread scraps to prevent the thread scraps from blocking the drain pipe 10.

In the embodiment of the invention, the method for detecting the turbidity of the washing machine 100 is also introduced, wherein the quartz crystal microbalance sensor 11 is used for detecting the turbidity of the washing water in the washing process of the clothes, and when the turbidity of the washing water reaches a set value, the washing machine 100 gives an alarm to prompt a user to stop washing.