False alarm prevention structure for sewage pail of scrubber

Abstract

The false alarm prevention structure comprises a sewage storage barrel and a filter element cover covering an opening in the top of the sewage storage barrel, water level electrodes and a suction opening in butt joint with a suction device of the scrubber are arranged on the filter element cover, a filter element is installed in the suction opening, the water level electrodes are provided with two positions and connected with probes penetrating into the sewage storage barrel, and the probes penetrate into the sewage storage barrel. Two probe tubes extending into the dirt storage barrel are arranged at the bottom of the filter element cover, the two probes are hermetically connected in the probe tubes in a penetrating manner, the bottoms of the probes penetrate out of the probe tubes to form detection sections, and the surface of one of the probe tubes is tightly sleeved with a drainage sleeve, or the upper part of the detection section of one of the probes is tightly sleeved with a drainage sleeve; the surface of the hydrophobic sleeve has hydrophobic and oleophobic effects, formation of a continuous water film can be effectively prevented, the situation that the two probes trigger a sewage full water level signal by mistake due to the water film is further avoided, the function of preventing false triggering can be achieved by simply sleeving the hydrophobic sleeve, the cost is low, and the device can be applied to different types of scrubbers at will and is wide in application.

Description

Technical Field

[0001] This utility model relates to the field of floor scrubbers, specifically a structure for preventing false alarms in the wastewater tank of a floor scrubber. Background Technology

[0002] Floor scrubbers are common household floor cleaning equipment. They combine vacuuming and sweeping with wet mopping, making floor cleaning quick and convenient, and are very popular.

[0003] The floor scrubber includes a main unit and a floor brush. The main unit is equipped with a suction motor and a wastewater tank. The bottom of the wastewater tank is connected to the floor brush, and the top is connected to the suction motor. The suction motor draws in the wastewater tank to create negative pressure, which in turn causes the suction port of the floor brush to suck the dirt from the floor into the wastewater tank for temporary storage.

[0004] Because the capacity of the sewage tank is limited, a detection device is installed inside the sewage tank to detect the internal water level. Typically, the detection device is located on the lid of the sewage tank and includes two water level electrodes. The water level electrodes are connected to two probes that extend into the sewage tank. When the water level reaches the high level and immerses in the detection section of the two probes, the two probes form a circuit with water as the medium, which in turn causes the two water level electrodes to conduct and generate a signal to inform the host that the water level in the sewage tank has reached the maximum limit, and notify the user to clean the sewage tank.

[0005] During the operation of the floor scrubber, wastewater may adhere to the bottom wall of the cover and form a water film. This water film can cause the detection sections of the two probes to form a loop, resulting in false alarms for the highest water level signal. This can affect the normal operation of the floor scrubber and reduce the user experience. Summary of the Invention

[0006] In order to overcome the shortcomings of the existing technology, this utility model provides a structure for preventing false alarms in the wastewater tank of a floor scrubber.

[0007] The technical solution adopted by this utility model to solve its technical problem is:

[0008] A false alarm prevention structure for the wastewater tank of a floor scrubber includes a wastewater storage tank and a filter cartridge cover that closes the top of the wastewater storage tank. The filter cartridge cover has a suction port that connects to the suction device of the floor scrubber, and a filter cartridge is installed inside the suction port. The filter cartridge cover also has two water level electrodes, and a probe that penetrates into the wastewater storage tank is connected below the water level electrode. The bottom of the filter cartridge cover has two probe tubes that extend into the wastewater storage tank. The two probes are sealed and connected inside the probe tubes, and the bottom of the probes extends out of the probe tubes to form a detection section. One of the probe tubes is tightly fitted with a hydrophobic sleeve, or the upper part of the detection section of one of the probes is tightly fitted with a hydrophobic sleeve.

[0009] A hydrophobic sleeve is also tightly fitted onto the surface of another probe tube or the upper part of the detection section of another probe.

[0010] The hydrophobic sleeve is made of polytetrafluoroethylene.

[0011] The hydrophobic sleeve is a Teflon heat shrink tubing.

[0012] The hydrophobic sleeve is fitted after the probe tube, and the distance between the hydrophobic sleeve and the inner wall of the sludge storage tank and the filter element cover is greater than or equal to 2mm.

[0013] The exposed surface length of the hydrophobic sleeve is greater than or equal to 4 mm.

[0014] When the hydrophobic sleeve is tightly fitted above the detection section of the probe, the upper part of the hydrophobic sleeve extends into the probe tube and is sandwiched between the probe and the inner wall of the probe tube. The length of the upper part of the hydrophobic sleeve extending into the probe tube is greater than or equal to 3 mm, while the length of the exposed lower part of the hydrophobic sleeve is greater than or equal to 4 mm.

[0015] The probe tube has a sealing component at its opening to form a seal with the probe. When the hydrophobic sleeve is tightly fitted above the detection section of the probe, the upper end of the hydrophobic sleeve engages with the opening of the probe tube.

[0016] A notch is formed on the bottom sidewall of the probe tube, and the detection section of the probe passes through the notch and is exposed inside the sludge storage tank. The hydrophobic sleeve is fitted over the notch, and the bottom end of the hydrophobic sleeve is flush with the top end of the notch.

[0017] The upper part of the probe tube is also provided with an installation limiting step.

[0018] The beneficial effects of this utility model are as follows: a hydrophobic sleeve is tightly fitted on the surface of the probe tube or the upper part of the detection section of the probe. The surface of the hydrophobic sleeve has a hydrophobic and oleophobic effect, which can effectively prevent the formation of a continuous water film, thereby avoiding the situation where the two probes are mistakenly triggered by the water film to achieve the function of preventing false triggering. Moreover, the function of preventing false triggering can be achieved simply by fitting the hydrophobic sleeve. It is low in cost and can be applied to different types of floor scrubbers, making it widely applicable. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a diagram showing the disassembly of the sewage tank;

[0021] Figure 2 This is a schematic diagram of the filter element cover of the first embodiment of this utility model;

[0022] Figure 3 yes Figure 2 Enlarged view of point A;

[0023] Figure 4 yes Figure 2A diagram showing the disassembled filter cartridge cover;

[0024] Figure 5 This is a schematic diagram of the filter element cover of the second embodiment of this utility model;

[0025] Figure 6 This is a schematic diagram of the probe structure of this utility model. Detailed Implementation

[0026] Reference Figures 1 to 6 A false alarm prevention structure for the wastewater tank of a floor scrubber includes a wastewater storage tank 1 and a filter cover 2 that closes the open top of the wastewater storage tank 1. The filter cover 2 has a suction port 21 that connects to the suction device of the floor scrubber. A filter element 3 is installed inside the suction port 21. The filter cover 2 also has two water level electrodes 22, with probes 4 penetrating the wastewater storage tank 1 connected below each electrode. The bottom of the filter cover 2 has a probe tube 23 extending into the wastewater storage tank 1. The probes 4 are sealed inside the probe tube 23 to prevent water from flowing out of the wastewater storage tank 1. The bottom of the probes 4 extends out of the probe tube 23, forming a detection section 41. When the water level reaches a high level and reaches the detection section 41 of the two probes 4, the two probes 4 form a circuit with water as the medium, thereby causing the two water level electrodes to conduct and generate a signal to inform the main unit that the water level in the wastewater tank has reached the maximum limit.

[0027] To address the issue of continuous water film adhering to the inner wall of the filter cover and causing the two detection sections to be blocked even when the water level has not reached the target level, a hydrophobic sleeve 5 can be tightly fitted onto the surface of one of the probe tubes 23, or onto the upper part of the detection section 41 of one of the probes 4. The hydrophobic sleeve 5 in both solutions has a hydrophobic and oleophobic effect, effectively preventing the formation of a continuous water film and thus avoiding the two probes 4 from mistakenly triggering the full water level signal due to the water film. This simple installation of the hydrophobic sleeve 5 achieves the prevention of false triggering, is low-cost, and can be applied to various types of floor scrubbers, making it widely applicable. Furthermore, both solutions can also have a hydrophobic sleeve fitted at another opposite location, i.e., tightly fitted onto the surface of the other probe tube 23 or onto the upper part of the detection section 41 of the other probe 4, further ensuring the continuity of the water film interception. The hydrophobic sleeve 5 is made of polytetrafluoroethylene (PTFE), commonly known as Teflon, which possesses excellent and continuous non-stick properties. Furthermore, the hydrophobic sleeve 5 is a Teflon heat shrink tubing. After it is fitted onto the probe tube 23, it can shrink and tightly wrap around the surface of the probe tube 23 or the probe 4 by heating, making the arrangement of the hydrophobic sleeve 5 very simple.

[0028] like Figure 4 , Figure 6The probe 4 shown includes a mounting bracket 42, a metal conductive rod 43, and a metal connecting piece 44. The top end of the metal conductive rod 43 is inserted into the mounting bracket 42, which is installed on the top of the probe tube 23 inside the filter cover 2. The metal connecting piece 44 is sleeved on the top end of the metal conductive rod 43 and fixed to the top surface of the mounting bracket 42. The bottom of the mounting bracket 42 is provided with a sealing part. When the probe 4 is inserted into the probe tube 23 from above, the sealing part seals and fills the upper port of the probe tube 23, thereby sealing the probe 4 to prevent sewage from flowing out of the sludge storage tank 1 from the probe tube.

[0029] The waste storage tank 1 is equipped with a dust and dirt pipe that connects the inside and outside. The inlet of the dust and dirt pipe is located at the bottom of the waste storage tank 1 and connects to the dust suction port of the floor scrubber. The outlet of the dust and dirt pipe connects to the inside of the waste storage tank 1 and is located at the top of the waste storage tank 1. The bottom of the filter cover 2 extends downward to form a water baffle 24, which covers the outlet of the dust and dirt pipe. The suction port 21 is located above the water baffle 24, and the water baffle 24 has a side ventilation port 25 that connects the suction port 21 to the inside of the waste storage tank 1. The two probe tubes 23 are arranged outside the water baffle 24 and are located on both sides of the water baffle 24 to prevent the sewage sucked in from the dust and dirt pipe due to the negative pressure inside the tank from directly splashing into the probe tubes 23 and probes 4.

[0030] As a preferred embodiment, after the hydrophobic sleeve 5 is installed on the probe tube 25, the distance between the hydrophobic sleeve 5 and the inner wall of the sludge storage tank 1 and the filter cover 2 is greater than or equal to 2mm. In this embodiment, the water baffle 24 is closest to the hydrophobic sleeve 5. Therefore, it is necessary to ensure that the distance between the hydrophobic sleeve 5 and the wall of the water baffle 24 is greater than or equal to 2mm. If the distance is too small, the air bubbles formed when absorbing sewage will adhere between the hydrophobic sleeve 5 and the water baffle 42, thereby forming a guide channel.

[0031] Generally, the distance between water droplets adhering to a smooth plastic surface is 3-10 mm. However, although the hydrophobic sleeve 5 has a surface with hydrophobic and oleophobic properties, if its length is less than 4 mm, water droplets adhering to the surface of the probe tube 25 will cover the surface of the hydrophobic sleeve 5, thus causing the hydrophobic sleeve to fail. Therefore, the exposed surface length of the hydrophobic sleeve is greater than or equal to 4 mm.

[0032] like Figure 5 As shown, when the hydrophobic sleeve 5 is tightly fitted above the detection section 41 of the probe 4, in order to prevent sewage from entering the probe tube opening and forming a conductive path between the internal water accumulation and the external water film, causing the hydrophobic sleeve 5 to fail, the upper part of the hydrophobic sleeve 5 extends into the probe tube and is sandwiched between the probe 4 and the inner wall of the probe tube 23. The length of the upper part of the hydrophobic sleeve extending into the probe tube 23 is greater than or equal to 3 mm, while the length of the exposed part of the lower part of the hydrophobic sleeve is greater than or equal to 4 mm.

[0033] Of course, a sealing component can also be provided at the opening of the probe tube 23 to form a seal with the probe 4. The sealing component can be a sealing ring or sealant injected between the probe tube 23 and the probe 4. The upper end of the hydrophobic sleeve 5 is joined to the opening of the probe tube 23 to prevent the probe part from leaking out. At this time, the surface length of the hydrophobic sleeve 5 tightly fitted above the detection section 41 of the probe 4 is greater than or equal to 4 mm.

[0034] like Figure 3 As shown, when the hydrophobic sleeve 5 is tightly fitted onto the surface of the probe tube 23, a notch 231 is formed on the bottom sidewall of the probe tube 23. The detection section 41 of the probe 4 passes through the notch 231 and is exposed inside the sludge storage tank 1. The sidewall forming the notch 231 can provide a certain degree of protection for the detection section 41. The notch 231 is opened towards the water baffle 24 to prevent debris from impacting the detection section 41. The hydrophobic sleeve 5 is fitted above the notch 231 without blocking the contact between the detection end 41 and water. When the bottom end of the hydrophobic sleeve 5 is flush with the top end of the notch 231, the surface length of the hydrophobic sleeve can be directly adopted as the minimum length of 4mm.

[0035] Preferably, the upper part of the probe tube 23 is also provided with an installation limiting step 232, which serves as a limiting installation reference for the hydrophobic sleeve 5, facilitating the positioning and installation of the hydrophobic sleeve 5.

[0036] Of course, when using the method of tightly fitting the hydrophobic sleeve 5 onto the surface of the probe tube 23, the hydrophobic sleeve 5 can also be the length from the limiting step 232 to the top of the notch 231. While not blocking the contact between the detection end 41 and the water, it can cover the probe tube 23 with the largest area, further avoiding the situation where the two probes are mistakenly triggered by the water film to trigger the sewage full water level signal.

Claims

1. A structure for preventing false alarms in the wastewater tank of a floor scrubber, comprising a wastewater storage tank (1) and a filter element cover (2) covering the open top of the wastewater storage tank (1), wherein the filter element cover (2) is provided with a suction port (21) for connecting with the suction device of the floor scrubber, a filter element (3) is installed inside the suction port (21), and a water level electrode (22) is also provided on the filter element cover (2), wherein the water level electrode (22) has two locations, and a probe (4) penetrating into the wastewater storage tank (1) is connected below the water level electrode (22), characterized in that: The bottom of the filter cover (2) is provided with two probe tubes (23) that extend into the sludge storage tank (1). The two probes (4) are sealed and connected inside the probe tubes (23) and the bottom of the probes (4) extends out of the probe tubes (23) to form a detection section (41). A hydrophobic sleeve (5) is tightly fitted on the surface of one of the probe tubes (23), or a hydrophobic sleeve (5) is tightly fitted on the upper part of the detection section (41) of one of the probes (4).

2. The anti-false alarm structure for the sewage tank according to claim 1, characterized in that: A hydrophobic sleeve (5) is also tightly fitted onto the surface of another probe tube (23) or the upper part of the detection section (41) of another probe (4).

3. The anti-false alarm structure for the sewage tank according to claim 1 or 2, characterized in that: The hydrophobic sleeve (5) is made of polytetrafluoroethylene material.

4. The anti-false alarm structure for the sewage tank according to claim 3, characterized in that: The hydrophobic sleeve (5) is a Teflon heat shrink tubing.

5. The anti-false alarm structure for the sewage tank according to claim 1 or 2, characterized in that: After the hydrophobic sleeve (5) is fitted onto the probe tube (23), the distance between the hydrophobic sleeve (5) and the inner wall of the sludge storage tank (1) and the filter element cover (2) is greater than or equal to 2 mm.

6. The anti-false alarm structure for the sewage tank according to claim 1 or 2, characterized in that: The exposed surface length of the hydrophobic sleeve (5) is greater than or equal to 4 mm.

7. The anti-false alarm structure for the sewage tank according to claim 6, characterized in that: When the hydrophobic sleeve (5) is tightly fitted above the detection section (41) of the probe (4), the upper part of the hydrophobic sleeve (5) extends into the probe tube and is sandwiched between the probe (4) and the inner wall of the probe tube (23). The length of the upper part of the hydrophobic sleeve extending into the probe tube (23) is greater than or equal to 3 mm, while the length of the exposed part of the lower part of the hydrophobic sleeve is greater than or equal to 4 mm.

8. The anti-false alarm structure for the sewage tank according to claim 6, characterized in that: The probe tube (23) has a sealing component at its opening to form a seal with the probe (4). When the hydrophobic sleeve (5) is tightly fitted above the detection section (41) of the probe (4), the upper end of the hydrophobic sleeve (5) is engaged with the opening of the probe tube (23).

9. The anti-false alarm structure for the sewage tank according to claim 6, characterized in that: The probe tube (23) has a notch (231) formed on the side wall at the bottom end. The detection section (41) of the probe (4) passes through the notch (231) and is exposed inside the sludge storage tank (1). The hydrophobic sleeve (5) is fitted above the notch (231), and the bottom end of the hydrophobic sleeve (5) is flush with the top end of the notch (231).

10. The anti-false alarm structure for the sewage tank according to claim 1, characterized in that: The upper part of the probe tube is also provided with an installation limiting step (232).

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