Liquid level detection device and washing device

Abstract

The utility model discloses a liquid level detection device and a washing device, the liquid level detection device comprises a detection channel, the detection channel is provided with a first port and a second port, the first port is connected with a washing bin; the detection unit is arranged on the detection channel and used for detecting the liquid level in the washing bin; the detection unit comprises a first liquid level detection device for detecting a first liquid level. According to the liquid level detection device and the washing device, the detection channel is arranged, the detection unit is arranged in the detection channel, and no detection device is arranged on the washing bin, so that connecting devices and connecting structures between the washing bin and the main machine are reduced, and the washing bin is more convenient to disassemble and replace.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid level detection, in particular to a liquid level detection device and a washing device. Background Art

[0002] The inner and outer barrels of traditional washing machines are connected, and a liquid level detection device is usually set in the outer barrel to detect the water level in the inner barrel, so as to control the amount of water entering the washing chamber. However, in order to avoid secondary contamination between the inner and outer barrels and improve the washing effect, some washing machines have begun to use a non-porous washing chamber. When using a non-porous washing chamber, it is impossible to judge the water level of the washing chamber by detecting the water level of the outer barrel like a traditional washing machine, and thus it is impossible to judge the amount of water entering the washing chamber. In order to detect the water level of the non-porous washing chamber, a liquid level sensor is usually installed in the washing chamber for detection, and the water level of the washing chamber is directly detected by the liquid level sensor. For example, the Chinese utility model patent with announcement number CN211734769U installs a water level sensor in the inner cavity of the lifting rib of the washing chamber, and the inner cavity of the lifting rib is connected to the washing chamber. By detecting the pressure of the air chamber of the water level sensor, the pressure is converted into an electrical signal representing the water level value, so as to judge the water level of the non-porous washing chamber.

[0003] In the prior art, a water level sensor is installed in the washing bin to directly detect the water level in the bin, thereby controlling the amount of water intake. However, additional devices still need to be installed in the washing bin, which increases the connection structure between the washing bin and the main unit, causing inconvenience to the user in disassembling and replacing the washing bin. In addition, the use of the above-mentioned water level sensor with an air chamber requires an additional air chamber structure between the sensor and the washing bin, and the water level is detected by converting pressure into an electrical signal, which not only makes the structure of the detection device more complicated, but also further increases the probability of detection errors. Utility Model Content

[0004] The utility model aims to address the deficiencies of the prior art and to provide a liquid level detection device which is easy to disassemble and replace a washing bin and has high reliability, and a washing device using the liquid level detection device.

[0005] In order to solve the deficiencies of the prior art, the utility model provides a liquid level detection device and a washing device, comprising:

[0006] A detection channel, the detection channel is provided with a first opening and a second opening, wherein the first opening is connected to the washing chamber;

[0007] The detection unit arranged in the detection channel is used to detect the liquid level in the washing bin; the detection unit includes a first liquid level detection device for detecting a first liquid level.

[0008] Furthermore, a second liquid level detecting device is provided for detecting a second liquid level, and the second liquid level is higher than the first liquid level.

[0009] Furthermore, the second liquid level detection device is a liquid level sensor.

[0010] Specifically, the liquid level sensor is a capacitive liquid level sensor.

[0011] Furthermore, the first liquid level detection device includes a first probe and a second probe, and the polarities of the first probe and the second probe are opposite.

[0012] Further, the first probe is arranged at the lower part of the detection channel, and the second probe is arranged above the first probe; or the first probe and the second probe are both arranged at the upper part of the detection channel to detect the first liquid level.

[0013] Furthermore, it also includes a heating element, which is arranged in the detection channel.

[0014] Furthermore, a third liquid level detection device for detecting a third liquid level is arranged in the detection channel above the heating element.

[0015] Further, the third liquid level detection device is a third probe, and the polarity of the third probe is opposite to that of the first probe.

[0016] Specifically, the third probe is preferably a temperature and liquid level two-in-one probe.

[0017] Furthermore, a drain pipe is provided at the bottom of the detection channel.

[0018] The utility model also provides a washing device, comprising:

[0019] Washing chamber;

[0020] As for the liquid level detection device mentioned above, the liquid level detection device is arranged beside the washing bin, and the bottom or the bottom end of the side wall of the washing bin is provided with a first connecting port connected to the first through port.

[0021] The utility model at least has the following beneficial effects:

[0022] 1. The utility model sets a detection channel and sets the detection unit in the detection channel, and does not set any detection device on the washing bin, thereby reducing the connection devices and connection structures between the washing bin and the host, and making it easier to disassemble and replace the washing bin; at the same time, the detection channel has a second opening and a first opening connected to the washing bin, so that the liquid level in the washing bin is the liquid level in the detection channel, and the detection unit detects the liquid level in the detection channel, thereby completing the detection of the liquid level in the washing bin, making the detection operation simple, convenient and effective, and there is no need to add an air chamber structure to detect the water level;

[0023] 2. By arranging a second liquid level detection device for detecting a second liquid level in the detection channel, when the first liquid level detection device fails, water continues to flow into the washing bin, and the water level in the detection channel continues to rise. When the second liquid level is reached, the second liquid level detection device identifies the water level in the detection channel and stops the water flow, thereby ensuring that the water flow does not continue, thereby improving the reliability of the entire liquid level detection device;

[0024] 3. Set a third liquid level near the heating element to protect the heating element and avoid dry burning of the heating element. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the liquid level detection device of the utility model.

[0026] Figure markings: 200 - detection channel, 210 - first port, 220 - second port, 230 - drain pipe, 310 - first liquid level detection device, 3111 - first probe, 3112 - second probe, 320 - second liquid level detection device, 321 - liquid level sensor, 330 - third liquid level detection device, 331 - third probe, 400 - heating element. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0028] It should be understood that terms such as “having”, “including” and “comprising” used herein do not specify the existence or addition of one or more other elements or combinations thereof.

[0029] See also Figure 1 The liquid level detection device of this embodiment is arranged in the main unit, including a detection channel 200 and a detection unit. The detection channel 200 is provided with a second opening 220 and a first opening 210 for connecting with the washing bin. The first opening 210 is arranged below the second opening 220. It can be understood that the first opening 210 and the second opening 220 can be circular openings or rectangular openings. It is worth noting that the second opening 220 can be connected to the inside of the washing bin or to the atmosphere to balance the pressure in the washing bin and the detection channel; the detection unit arranged on the detection channel 200 is used to detect the liquid level in the washing bin; the detection unit includes a first liquid level detection device 310 for detecting the first liquid level and a second liquid level detection device 320 for detecting the second liquid level, and the second liquid level is higher than the first liquid level, and the first liquid level is consistent with the highest liquid level in the washing bin.

[0030] Specifically, the detection unit is arranged in the detection channel 200, and the detection channel 200 is connected with the washing tank. Washing water is injected into the washing tank. The detection unit identifies the water level in the detection channel 200 to judge the water level in the washing tank, thereby avoiding the need to add liquid level detection devices to the washing tank, reducing the number of devices on the washing tank that need to be connected to the host, and making it easier to disassemble and replace the washing tank. When the first liquid level detection device 310 detects that the water level in the detection channel 200 reaches the first liquid level, it is determined that the water level in the washing tank reaches the maximum liquid level, and water inlet can be stopped at this time.

[0031] If the first liquid level detection device 310 fails, water continues to enter the washing chamber, and the water level in the detection channel 200 continues to rise. When the second liquid level is reached, the second liquid level detection device 320 identifies the water level in the detection channel 200 and stops the water intake. The reliability of the entire liquid level detection device is improved by providing the second liquid level detection device 320.

[0032] In the above embodiment, the first liquid level detection device 310 includes a first probe 3111 and a second probe 3112. The first probe 3111 is arranged at the bottom of the detection channel 200, and the second probe 3112 is arranged at the first liquid level and above the first probe 3111, or the first probe 3111 and the second probe 3112 are both arranged at the upper part of the detection channel 200 to detect the first liquid level; the first probe 3111 and the second probe 3112 have opposite polarities. It should be understood that the first probe 3111 can be the positive electrode and the second probe 3112 can be the negative electrode, or the first probe 3111 can be the negative electrode and the second probe 3112 can be the positive electrode. When the first probe 3111 and the second probe 3112 are connected, it means that the water level in the detection channel 200 has reached the first liquid level, that is, the water level in the washing bin has reached the highest liquid level. At this time, water intake can be stopped. The above-mentioned bipolar water level probe 311 is used as a detection device, which can more accurately monitor water level changes and reduce errors that may occur in a single electrode.

[0033] Of course, in other embodiments, a monopolar water level probe may also be used to achieve the purpose of detecting the first liquid level, that is, to detect the highest liquid level in the washing bin and then stop the water intake.

[0034] In the above embodiment, the second liquid level detection device 320 is a liquid level sensor 321. Furthermore, the liquid level sensor 321 is a capacitive liquid level sensor. The use of a non-contact liquid level sensor can avoid the corrosion of the device by the detergent and improve the service life of the device. For example, the patch-type liquid level sensor is attached to the outer wall of the detection channel 200. At the same time, the liquid level detection device for detecting the second liquid level and the liquid level detection device for detecting the first liquid level use liquid level detection devices with different detection principles, which further improves the reliability of the entire liquid level detection device.

[0035] In the above embodiment, a heating element 400 is also included. The heating element 400 is arranged in the detection channel 200. The heating element 400 is a prior art product. The heating element 400 heats the washing water in the washing bin to achieve high-temperature disinfection and sterilization. Furthermore, the heating element 400 is arranged near the first opening 210, which is closer to the washing bin, and has a better heating effect on the washing water in the bin. Of course, it can also be arranged at other positions;

[0036] In order to avoid the phenomenon of dry burning, a third liquid level detection device 330 for detecting the third liquid level is provided on the detection channel 200 above the heating element 400. The third liquid level position is higher than the heating element 400. The third liquid level detection device 330 is used to detect the water level near the heating element 400. When the water level in the detection channel 200 reaches the third liquid level, the heating element 400 is turned on to avoid the phenomenon of dry burning of the heating element. Specifically, the third liquid level detection device 330 is a third probe 331. The polarity of the first probe 3111 is opposite to that of the third probe 331. When the first probe 3111 is connected to the third probe 331, it means that the water level in the detection channel 200 is higher than the heating element 400, and heating can be turned on. Further, in order to control the temperature of the heated water, the third probe 331 is preferably a temperature and liquid level two-in-one probe. It can detect the water temperature while detecting the liquid level. When the preset water temperature is reached, the heating element 400 is turned off. Of course, a temperature probe can also be set separately to detect the water temperature.

[0037] Of course, in other embodiments, the first probe 3111 and the third probe 331 may be disposed above the heating element 400 at the same time, which can also achieve the purpose of detecting the water level for stopping water inflow and the heating protection water level.

[0038] It should be noted that the above installation methods of the first probe 3111 , the second probe 3112 and the third probe 331 all belong to the prior art.

[0039] In the above embodiment, a drain pipe 230 is provided at the bottom of the detection channel 200 , and the drain pipe 230 is used to discharge the washing water inside the detection channel 200 . It should be understood that the detection channel 200 can be of any shape and is not specifically limited here. For the convenience of description, the detection channel 200 in this embodiment includes a first connecting section and an extension section connected to the first opening 210, and the second opening 220 is opened at the top of the extension section to communicate with the atmosphere. It is worth noting that the extension section can also be connected to the second connecting section, and the second opening 220 is opened on the second connecting section to connect to the inside of the washing bin; the lower end of the extension section is connected to the first connecting section, and the drain pipe 230 is arranged at the bottom of the first connecting section; and the heating element 400 is installed in the first connecting section near the first opening 210, and the third liquid level detection device 330 is installed above the heating element 400; the second liquid level detection device 320 is installed at the top of the extension section, the first probe 3111 is installed at the end of the first connecting section away from the first opening 210, and the second probe 3112 is installed at the top of the extension section and is located below the second liquid level detection device 320.

[0040] The present utility model also provides another implementation mode, which is different from the above embodiment in that the first liquid level detection device 310, the second liquid level detection device 320 and the third liquid level detection device 330 can all adopt liquid level sensors, such as photoelectric liquid level sensors, capacitive liquid level sensors, ultrasonic liquid level sensors, etc., that is, one or more types of liquid level sensors are respectively installed on the first liquid level, the second liquid level and / or the third liquid level to respectively detect the water level when water inlet stops, i.e., the first liquid level, the failure protection water level, i.e., the second liquid level, and the heating protection water level, i.e., the third liquid level.

[0041] The utility model also provides a washing device, including a washing bin and the above-mentioned liquid level detection device, wherein the liquid level detection device is arranged beside the washing bin. Specifically, a first connecting port connected to the first through port 210 is provided at the bottom or the bottom end of the side wall of the washing bin, so as to realize the connection between the detection channel 200 and the washing bin, or a second connecting port connected to the second through port 220 is also provided on the side wall of the washing bin.

[0042] In summary, the detection device of the present invention sets a detection channel 200 and sets the detection unit in the detection channel, and does not set any detection device on the washing bin, thereby reducing the connection devices and connection structures between the washing bin and the host, and making it easier to disassemble and replace the washing bin; at the same time, the detection channel 200 has a first port 210 and a second port 220 connected to the washing bin, so that the liquid level in the washing bin is the liquid level in the detection channel 200, and the detection unit detects the liquid level in the detection channel 200, thereby completing the detection of the liquid level in the washing bin, making the detection operation simple, convenient and effective, without the need to add an air filter. The chamber structure is used to detect the water level; by setting a second liquid level detecting device 320 for detecting the second liquid level in the detection channel 200, when the first liquid level detecting device fails, water continues to flow into the washing bin, and the water level in the detection channel 200 continues to rise. When the second liquid level is reached, the liquid level sensor 321 recognizes the water level in the detection channel 200 and stops the water flow, thereby ensuring that the water does not continue to flow in, thereby improving the reliability of the entire liquid level detecting device; a third liquid level detecting device 330 for detecting the third liquid level is set near the heating element 400 to protect the heating element 400 and avoid the phenomenon of the heating element burning dry.

[0043] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation scheme. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described here. Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention.

Claims

1. A liquid level detection device, characterized in that: include: A detection channel (200), the detection channel (200) being provided with a first opening (210) and a second opening (220), the first opening (210) being connected to the washing bin; A detection unit arranged on the detection channel (200) is used to detect the liquid level in the washing bin; the detection unit comprises a first liquid level detection device (310) for detecting a first liquid level.

2. A liquid level detection device according to claim 1, characterized in that: The detection unit further comprises a second liquid level detection device (320) for detecting a second liquid level, and the second liquid level is higher than the first liquid level.

3. A liquid level detection device according to claim 2, characterized in that: The second liquid level detection device (320) is a liquid level sensor (321).

4. A liquid level detection device according to claim 1, characterized in that: The first liquid level detection device (310) comprises a first probe (3111) and a second probe (3112), and the polarities of the first probe (3111) and the second probe (3112) are opposite.

5. A liquid level detection device according to claim 4, characterized in that: The first probe (3111) is arranged at the lower part of the detection channel (200), and the second probe (3112) is arranged above the first probe (3111); Alternatively, the first probe (3111) and the second probe (3112) are both arranged at the upper part of the detection channel (200) to detect the first liquid level.

6. A liquid level detection device according to claim 4, characterized in that: It also includes a heating element (400), and the heating element (400) is arranged in the detection channel (200).

7. A liquid level detection device according to claim 6, characterized in that: A third liquid level detection device (330) for detecting a third liquid level is arranged on the detection channel (200) above the heating element (400).

8. A liquid level detection device according to claim 7, characterized in that: The third liquid level detection device (330) is a third probe (331), and the polarity of the third probe (331) is opposite to that of the first probe (3111).

9. A liquid level detection device according to claim 1, characterized in that: A drainage pipe (230) is provided at the bottom of the detection channel (200).

10. A washing device, characterized in that: include: Washing chamber; The liquid level detection device according to any one of claims 1 to 9, wherein the liquid level detection device is arranged beside the washing bin, and a first connection port connected to the first opening (210) is provided at the bottom or the bottom end of the side wall of the washing bin.

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