Water level detection structure for washing machine
By designing a water level detection structure in which conductive bolts come into contact with water in the washing machine, the problem of signal distortion in the traditional pressure water level sensor in the foam environment is solved, and a more accurate and reliable water level sensing is achieved.
Patent Information
- Application Number
- CN202420748763.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-11
- Publication Date
- 2025-05-09
- Estimated Expiration
- 2034-04-11
AI Technical Summary
The pressure water level sensors in existing washing machines are prone to gas trapping when foam is generated, resulting in signal distortion or sensor failure.
A water level detection structure including a shell, a rotating shaft, a water storage bucket, a conductive slip ring and a water collecting ring is designed. The electrical connection is achieved through conductive bolts and the water contact is realized, and the angle signal is transmitted to obtain water level information.
It effectively avoids signal distortion, ensures the accuracy and reliability of water level sensing, and solves the problem of failure of traditional water level sensors in foam environments.
Smart Images
Figure CN222847042U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of washing machines, and particularly relates to a water level detection structure for washing machines. Background Art
[0002] Washing machines are generally equipped with a water level sensor, which transmits the detected water level signal to the control end through a signal line, and the control end controls the opening and closing of the water inlet valve according to the received signal.
[0003] Washing machines mostly use pressure-type water level sensors to judge or determine the water level. The air pressure conduit connecting the water level sensor and the environment inside the outer drum is particularly important as an intermediate link in pressure transmission. When the washing machine is filled with water, the washing water enters the conduit and compresses the air in the conduit. The pressure sensor determines the change in water level by detecting the change in air pressure. However, in actual use, a large amount of foam will be generated in the outer drum of the washing machine, which makes it easy for air to be trapped in the air pressure conduit. This will distort the signal received by the water level sensor and even cause the water level sensor to fail. Therefore, a new water level detection structure is urgently needed. Utility Model Content
[0004] The purpose of the utility model is to solve the above problems in the prior art and to propose a water level detection structure for a washing machine.
[0005] The above technical purpose of the utility model can be achieved through the following technical solutions: a water level detection structure for a washing machine, comprising a shell, a rotating shaft, a water storage bucket, a conductive slip ring and a water collecting ring, the rotating shaft is rotatably arranged in the shell, the water storage bucket is connected to the rotating shaft, the conductive slip ring is coaxially arranged on the rotating shaft, the water collecting ring is connected to the water storage bucket, a water outlet channel is arranged on the water collecting ring, the water storage bucket is communicated with the water collecting ring through the water outlet channel, a conductive bolt 1 and a conductive bolt 2 are arranged on the water collecting ring, the conductive bolt 1 and the conductive bolt 2 are both electrically connected to an external sensor through the conductive slip ring, and when the conductive bolt 1 and the conductive bolt 2 are both in contact with water, the conductive bolt 1 and the conductive bolt 2 are electrically connected.
[0006] In the above-mentioned water level detection structure for a washing machine, the end of the first conductive bolt and the end of the second conductive bolt both extend into the water outlet channel.
[0007] In the above-mentioned water level detection structure for a washing machine, the water collecting ring is provided with a mounting hole 1 for mounting the conductive bolt 1 and a mounting hole 2 for mounting the conductive bolt 2.
[0008] In the above-mentioned water level detection structure for a washing machine, a water outlet pipe is arranged on the water collecting ring, and the water outlet channel is arranged in the water outlet pipe.
[0009] In the above-mentioned water level detection structure for a washing machine, the end of the water outlet pipe extends into the water storage barrel.
[0010] In the above-mentioned water level detection structure for a washing machine, the water outlet channel is L-shaped.
[0011] In the above-mentioned water level detection structure for a washing machine, a receiving cavity is provided on the rotating shaft, the conductive slip ring is arranged in the receiving cavity, and a water seal for sealing the receiving cavity is sleeved on the rotating shaft.
[0012] In the above-mentioned water level detection structure for a washing machine, a motor is arranged in the shell, a driving pulley is connected to the output end of the motor, a driven pulley is connected to the rotating shaft, and the driving pulley and the driven pulley are connected by a transmission belt.
[0013] In summary, the beneficial effects of the present invention compared with the prior art are as follows:
[0014] Both the conductive bolt 1 and the conductive bolt 2 are electrically connected to the sensor through a conductive slip ring. Since water is conductive, when the conductive bolt 1 and the conductive bolt 2 are in contact with water, the conductive bolt 1 and the conductive bolt 2 are electrically connected, thereby transmitting the angle signal of the conductive bolt 1 and the conductive bolt 2 to the sensor, thereby obtaining the current water level and water volume information. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 is a cross-sectional view of an embodiment;
[0016] Figure 2 It is a partial structural schematic diagram of an embodiment;
[0017] Figure 3 It is a schematic structural diagram of the water collecting ring of the embodiment.
[0018] Figure numerals: 1. outer shell; 2. rotating shaft; 3. water storage barrel; 4. conductive slip ring; 5. water collecting ring; 6. water outlet channel; 7. conductive bolt one; 8. conductive bolt two; 9. mounting hole one; 10. mounting hole two; 11. water outlet pipe; 12. accommodating chamber; 13. water seal; 14. motor; 15. driving pulley; 16. driven pulley; 17. transmission belt. DETAILED DESCRIPTION
[0019] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
[0020] A water level detection structure for a washing machine, such as Figures 1 to 3 As shown, it includes a shell 1, a rotating shaft 2, a water storage bucket 3, a conductive slip ring 4 and a water collecting ring 5. The rotating shaft 2 is rotatably arranged in the shell 1. A motor 14 is arranged in the shell 1. The output end of the motor 14 is connected to a driving pulley 15. A driven pulley 16 is connected to the rotating shaft 2. The driving pulley 15 and the driven pulley 16 are connected through a transmission belt 17. As another solution, a brushless DC motor can also be used to directly drive the rotating shaft 2.
[0021] The water storage barrel 3 is connected to the rotating shaft 2, the conductive slip ring 4 is coaxially arranged on the rotating shaft 2, a receiving cavity 12 is arranged on the rotating shaft 2, the conductive slip ring 4 is arranged in the receiving cavity 12, and a water seal 13 for sealing the receiving cavity 12 is sleeved on the rotating shaft 2 to prevent water from entering the receiving cavity 12 and affecting the normal operation of the conductive slip ring 4.
[0022] The water collecting ring 5 is connected to the water storage barrel 3, and a water outlet channel 6 is provided on the water collecting ring 5. The water storage barrel 3 is connected to the water collecting ring 5 through the water outlet channel 6. The water outlet channel 6 is L-shaped. Specifically, a water outlet pipe 11 is provided on the water collecting ring 5, and the water outlet channel 6 is arranged in the water outlet pipe 11. The end of the water outlet pipe 11 extends into the water storage barrel 3, thereby connecting the water storage barrel 3 with the water collecting ring 5.
[0023] The water collecting ring 5 is provided with a conductive bolt 1 7 and a conductive bolt 2 8. Both the conductive bolt 1 7 and the conductive bolt 2 8 are electrically connected to the external sensor through the conductive slip ring 4. When the conductive bolt 1 7 and the conductive bolt 2 8 are in contact with water, the conductive bolt 1 7 and the conductive bolt 2 8 are electrically connected.
[0024] The water collecting ring 5 is provided with a mounting hole 9 for mounting a conductive bolt 7 and a mounting hole 10 for mounting a conductive bolt 8. The conductive bolt 7 is threadedly connected in the mounting hole 9, and the conductive bolt 8 is threadedly connected in the mounting hole 10. The ends of the conductive bolt 7 and the ends of the conductive bolt 8 both extend into the water outlet channel 6.
[0025] As another solution, the conductive bolt 1 7 and the conductive bolt 2 8 can also be set at the water outlet of the water storage barrel 3.
[0026] It should be noted that, through the contact between water and the conductive bolt 1 7 and the conductive bolt 2 8, the conductive bolt 1 7 and the conductive bolt 2 8 are electrically connected, so that the angle signal of the conductive bolt 1 7 and the conductive bolt 2 8 is transmitted to the sensor, thereby obtaining the current water level information.
[0027] It should be noted that, as another solution, the angle signal can also be obtained by a Hall position sensor according to the angle change caused by the rotation of the rotating shaft 2 and the water storage bucket 3 , and different rotation angles correspond to different water storage capacities in the water storage bucket 3 .
[0028] The specific embodiments described in this article are merely examples of the spirit of the utility model; technicians in the technical field to which the utility model belongs can make various modifications or additions to the described specific embodiments or replace them in a similar manner, but will not deviate from the spirit of the utility model or exceed the scope defined by the attached claims.
Claims
1. A water level detection structure for a washing machine, characterized in that: The invention comprises a housing (1), a rotating shaft (2), a water storage bucket (3), a conductive slip ring (4) and a water collecting ring (5), wherein the rotating shaft (2) is rotatably arranged in the housing (1), the water storage bucket (3) is connected to the rotating shaft (2), the conductive slip ring (4) is coaxially arranged on the rotating shaft (2), the water collecting ring (5) is connected to the water storage bucket (3), a water outlet channel (6) is arranged on the water collecting ring (5), the water storage bucket (3) and the water collecting ring (5) are communicated through the water outlet channel (6), a conductive bolt 1 (7) and a conductive bolt 2 (8) are arranged on the water collecting ring (5), the conductive bolt 1 (7) and the conductive bolt 2 (8) are both electrically connected to an external sensor through the conductive slip ring (4), and when the conductive bolt 1 (7) and the conductive bolt 2 (8) are both in contact with water, the conductive bolt 1 (7) and the conductive bolt 2 (8) are electrically connected.
2. A water level detection structure for a washing machine according to claim 1, characterized in that: The end of the conductive bolt one (7) and the end of the conductive bolt two (8) both extend into the water outlet channel (6).
3. The water level detection structure for a washing machine according to claim 1, characterized in that: The water collecting ring (5) is provided with a mounting hole one (9) for mounting the conductive bolt one (7) and a mounting hole two (10) for mounting the conductive bolt two (8).
4. The water level detection structure for a washing machine according to claim 1, characterized in that: The water collecting ring (5) is provided with a water outlet pipe (11), and the water outlet channel (6) is arranged in the water outlet pipe (11).
5. A water level detection structure for a washing machine according to claim 4, characterized in that: The end of the water outlet pipe (11) extends into the water storage barrel (3).
6. The water level detection structure for a washing machine according to claim 1, characterized in that: The water outlet channel (6) is L-shaped.
7. The water level detection structure for a washing machine according to claim 1, characterized in that: The rotating shaft (2) is provided with a receiving cavity (12), the conductive slip ring (4) is arranged in the receiving cavity (12), and the rotating shaft (2) is sleeved with a water seal (13) for sealing the receiving cavity (12).
8. The water level detection structure for a washing machine according to claim 1, characterized in that: A motor (14) is arranged in the housing (1), the output end of the motor (14) is connected to a driving pulley (15), the rotating shaft (2) is connected to a driven pulley (16), and the driving pulley (15) and the driven pulley (16) are connected in transmission via a transmission belt (17).