Cleaning equipment for non-contact liquid level detection

Abstract

The utility model provides cleaning equipment with a non-contact liquid level detection function. A main control module is integrated in a machine body; the grip is detachably arranged on the machine body through a connecting rod, and the connecting rod is of a telescopic structure. The sewage tank is detachably mounted at the front part of the machine main body and comprises a solid-liquid separation cavity and a sewage accommodating cavity which are separated from each other up and down; the first liquid level detection module is arranged on any outer side surface of the sewage accommodating cavity close to the solid-liquid separation cavity; the clear water tank is detachably mounted at the rear part of the machine main body; the second liquid level detection module is arranged on any outer side surface of the clear water tank; each of the first liquid level detection module and the second liquid level detection module comprises a sensor, a capacitive liquid level detection circuit and an MCU / logic processing unit, and the first liquid level detection module and the second liquid level detection module are not in contact with liquid in the sewage tank and the clear water tank; the first liquid level detection module and the second liquid level detection module detect liquid level information in the clear water tank and the sewage containing cavity respectively.

Description

Technical Field

[0001] This application relates to the technical field of cleaning equipment, and particularly to a cleaning equipment with non-contact liquid level detection. Background Art

[0002] In the related art, most of the existing cleaning equipment detects liquid level information through two conductors. Currently, there are many types of liquid level sensors on the market, such as float type, photoelectric type, capacitive type, ultrasonic type, etc., each with its own corresponding advantages and disadvantages. Any object has capacitance, and the capacitance size is related to the dielectric constant and volume. The liquid level sensor determines the height of the liquid level or the state of the presence or absence of liquid by detecting the change in the capacitance of the object. After the liquid level sensor is closely attached to the container wall, a capacitor similar to a parallel plate capacitor is formed between the sensor and the liquid. The capacitance value of this capacitor is affected by the interaction area between the liquid and the sensor and the dielectric constant of the container wall. Utility Model Content

[0003] To solve the above technical problems, this application proposes a cleaning equipment with non-contact liquid level detection, including:

[0004] A main body of the machine, in which a main control module is integrated;

[0005] A handle and a connecting rod, the handle is detachably arranged on the main body of the machine through the connecting rod, and the connecting rod has a telescopic structure;

[0006] A sewage tank, which is detachably installed at the front of the main body of the machine, and the sewage tank includes a solid-liquid separation chamber and a sewage storage chamber separated up and down;

[0007] A first liquid level detection module, which is arranged at any outer side of the sewage storage chamber close to the solid-liquid separation chamber;

[0008] A clean water tank, which is detachably installed at the rear of the main body of the machine;

[0009] A second liquid level detection module, which is arranged at any outer side of the clean water tank;

[0010] The first liquid level detection module and the second liquid level detection module include: a sensor, a capacitive liquid level detection circuit, an MCU / logic processing unit, and the first liquid level detection module and the second liquid level detection module do not contact the liquid in the sewage tank and the clean water tank;

[0011] The first liquid level detection module and the second liquid level detection module respectively detect the liquid level information in the clean water tank and the sewage storage chamber, and the first liquid level detection module and the second liquid level detection module respectively transmit the detected liquid level information to the main control module.

[0012] This application is further configured such that the sensor includes: a conductive metal sheet, a spring, conductive tape, conductive cotton or a thermistor sensor.

[0013] With the above technical solutions, the capacitive liquid level detection module monitors the liquid levels in the clean water tank and the sewage tank to avoid overflow. Among them, the capacitive liquid level detection chip is mainly used to collect the capacitance of the liquid level detection sensor and the capacitance of the comparison circuit channel, and through internal logic processing, obtain the high and low level signals for output.

[0014] This application is further configured such that the MCU / logic processing unit of the capacitive liquid level detection circuit is built by separately independent detection chips and a single-chip microcomputer, or packaged together to form a capacitive liquid level detection chip.

[0015] This application is further configured such that a conductive metal sheet or a spring is sleeved on the clean water tank and the sewage containing cavity, and a contact is provided on the conductive metal sheet or the spring, which is electrically connected to the capacitive liquid level detection circuit, and whether there is liquid in the liquid flow pipeline is detected through the change of the capacitance of the conductive metal sheet or the spring itself.

[0016] This application is further configured such that conductive adhesive tape or conductive cotton is pasted on the clean water tank and the sewage containing cavity, and is electrically connected to the capacitive liquid level detection circuit, and whether there is liquid in the clean water tank and the sewage containing cavity is detected through the change of the capacitance of the conductive adhesive tape or the conductive cotton itself.

[0017] This application is further configured such that the clean water tank and the sewage tank are insulating medium boxes, including rubber pipes, plastic pipes, glass boxes or plastic-glass connected boxes, which are boxes for liquid circulation and storage.

[0018] This application is further configured such that the sensor detects whether there is liquid flowing through the clean water tank and the sewage containing cavity, and the capacitive liquid level detection chip analyzes and processes the liquid information in the clean water tank and the sewage containing cavity, and then uploads the information to the main control module.

[0019] The beneficial effect of this application is that compared with the existing resistive liquid level detection module, the capacitive liquid level detection module has the advantages of simple circuit layout, high sensitivity, and can effectively avoid the influence of water droplets hanging on the wall by reasonably adjusting the water level point. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings are included to provide a further understanding of the embodiments and are incorporated into and constitute a part of this specification. The drawings illustrate the embodiments and, together with the description, are used to explain the principles of the present application. Other embodiments and many of the expected advantages of the embodiments will be readily apparent as they become better understood by reference to the following detailed description. The elements of the drawings are not necessarily to scale with each other. The same reference numerals refer to corresponding like parts.

[0021] Figure 1 It is a schematic structural diagram of a cleaning device for non-contact liquid level detection according to an embodiment of the present application;

[0022] Figure 2 It is a schematic structural diagram of a water tank of a non-contact liquid level detection cleaning device according to an embodiment of the present application;

[0023] Figure 3 It is a schematic structural diagram of a sewage tank of a non-contact liquid level detection cleaning device according to an embodiment of the present application;

[0024] Figure 4 It is a schematic circuit diagram of a non-contact liquid level detection cleaning device according to an embodiment of the present application.

[0025] The meanings of the numbers in the figure:

[0026] 1, body main body; 2, grip; 3, connecting rod; 4, sewage tank; 4a, solid-liquid separation chamber; 4b, sewage containing chamber; 5, water tank; 6, sensor; 7a, first liquid level detection module; 7b, second liquid level detection module. Detailed implementation manners

[0027] In the following detailed description, reference is made to the accompanying drawings which form a part of the detailed description and in which are shown illustrative specific embodiments by which the present application may be practiced. In this regard, directional terms such as "top", "bottom", "left", "right", "upper", "lower", etc. are used with reference to the orientation of the described figures. Since the components of the embodiments can be positioned in several different orientations, directional terms are used for purposes of illustration and are in no way limiting. It should be understood that other embodiments may be utilized or logical changes may be made without departing from the scope of the present application. Therefore, the following detailed description should not be taken in a limiting sense, and the scope of the present application is defined by the appended claims.

[0028] Figure 1 It is a schematic structural diagram of a non-contact liquid level detection cleaning device according to an embodiment of the present application, Figure 2 It is a schematic structural diagram of a sewage tank of a non-contact liquid level detection cleaning device according to an embodiment of the present application, Figure 3 It is a schematic structural diagram of a water tank of a non-contact liquid level detection cleaning device according to an embodiment of the present application, as Figures 1 to 3As shown in the figure, a cleaning device for non-contact liquid level detection includes: a body main body 1 with a main control module integrated therein; a grip 2 and a connecting rod 3. The grip 2 is detachably arranged on the body main body 1 through the connecting rod 3, and the connecting rod 3 has a telescopic structure; a sewage tank 4 detachably installed at the front of the body main body 1, and the sewage tank 4 includes a solid-liquid separation chamber 4a and a sewage storage chamber 4b separated up and down; a first liquid level detection module 7a arranged on any outer side of the sewage storage chamber 4b close to the solid-liquid separation chamber 4a; a clean water tank 5 detachably installed at the rear of the body main body 1; a second liquid level detection module 7b arranged on any outer side of the clean water tank 5. The first liquid level detection module 7a and the second liquid level detection module 7b include: a sensor 6, a capacitive liquid level detection circuit, and an MCU / logic processing unit, and the first liquid level detection module 7a and the second liquid level detection module 7b do not contact the liquid in the sewage tank 4 and the clean water tank 5. The first liquid level detection module 7a and the second liquid level detection module 7b respectively detect the liquid level information in the clean water tank 5 and the sewage storage chamber 4b, and the first liquid level detection module 7a and the second liquid level detection module 7b respectively transmit the detected liquid level information to the main control module.

[0029] Among them, the sensor 6 includes: a conductive metal sheet, a spring, conductive adhesive tape, conductive cotton or a thermistor. In addition, the number of the sensors 6 is not limited.

[0030] The number and specific positions of the first liquid level detection module 7a and the second liquid level detection module 7b can be adjusted according to actual needs. Taking the example of "arranging a second liquid level detection module 7b at the top and bottom of any outer side of the clean water tank 5", through this solution, the monitoring of water shortage and full water in the clean water tank 5 can be realized, so as to realize functions such as water shortage prompt and automatic water addition for the clean water tank.

[0031] Figure 4 is a circuit principle block diagram of a cleaning device for non-contact liquid level detection according to an embodiment of the present application. As Figure 4 shown, the capacitive liquid level detection circuit MCU / logic processing unit is built by separating independent detection chips and single-chip microcomputers or packaged together to form a capacitive liquid level detection chip.

[0032] The conductive metal sheet or spring is sleeved on the clean water tank 5 and the solid-liquid separation chamber 4a. The conductive metal sheet or spring is provided with a contact point, which is electrically connected to the capacitive liquid level detection circuit. Whether there is liquid in the liquid flow pipeline is detected by the change of the self-capacitance of the conductive metal sheet or spring.

[0033] The conductive adhesive tape or conductive cotton is pasted on the clean water tank 5 and the sewage storage chamber 4b and is electrically connected to the capacitive liquid level detection circuit. Whether there is liquid in the clean water tank 5 and the sewage storage chamber 4b is detected by the change of the self-capacitance of the conductive adhesive tape or conductive cotton.

[0034] The clean water tank 5 and the sewage tank 4 belong to insulating medium boxes, including rubber pipes, plastic pipes, glass boxes or plastic-glass connected boxes, which are boxes for liquid circulation and storage.

[0035] The sensor 6 detects whether there is liquid flowing through the clean water tank 5 and the sewage holding chamber 4b, analyzes and processes the liquid information of the clean water tank 5 and the sewage holding chamber 4b through a capacitance liquid level detection chip, and then uploads the information to the main control module.

[0036] To better illustrate the present application, in combination with Figure 4 The working principle of the present application is described as follows. The capacitance liquid level detection circuit is electrically connected to the helical spring. The helical spring is connected in series on an 8-mm rubber pipe. The diameter of the helical spring is preferably kept the same as that of the rubber pipe to ensure that the spring can closely adhere to the pipe wall or compress the pipe wall to a certain extent, so as to maintain good consistency among various devices and equipment. When liquid flows through the inner diameter of the pipe, the overall capacitance of the helical spring will increase. The overall capacitance value of the capacitance liquid sensor helical spring is collected through the capacitance liquid level detection chip. When it exceeds the internal set threshold of the capacitance liquid level detection chip, and through the logic processing unit of the capacitance liquid level detection chip, the sampled capacitance change value data is subjected to corresponding logic processing, including threshold judgment and debounce processing, to provide information on whether there is liquid in the effective liquid flow pipe to the host computer or the peripheral alarm control device. The sensitivity can be adjusted by software or hardware. The liquid level detection point of the device can approach the point to be measured. In this example, a high-precision capacitor is used to adjust the corresponding water level to be measured. Of course, in other cases, it can be designed to include adjusting the sensitivity using software, or other hardware adjustment methods, including resistors or capacitors, etc.

[0037] In addition, to achieve a better detection effect, the first liquid level detection module 7a and the second liquid level detection module 7b are generally required to have dimensions sufficient to cover any outer wall of the clean water tank 5 and any outer wall of the sewage holding chamber 4b.

[0038] Obviously, those skilled in the art can make various modifications and changes to the embodiments of the present application without departing from the spirit and scope of the present application. In this way, if these modifications and changes are within the scope of the claims of the present application and their equivalent forms, the present application also aims to cover these modifications and changes. The word "comprising" does not exclude the presence of other elements or steps not listed in the claims. The simple fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage. Any reference signs in the claims should not be construed as limiting the scope.

Claims

1. A non-contact liquid level detection cleaning device, characterized in that: include: A fuselage body, wherein a main control module is integrated in the fuselage body; A handle and a connecting rod, wherein the handle is detachably arranged on the fuselage body through the connecting rod, and the connecting rod has a retractable structure; A sewage tank, the sewage tank is detachably mounted on the front part of the fuselage body, and the sewage tank comprises a solid-liquid separation chamber and a sewage receiving chamber which are separated into upper and lower parts; A first liquid level detection module is disposed on any outer side of the sewage holding chamber near the solid-liquid separation chamber; A clean water tank, the clean water tank being detachably mounted at the rear of the fuselage body; A second liquid level detection module is arranged on any outer side of the clean water tank; The first liquid level detection module and the second liquid level detection module include: a sensor, a capacitive liquid level detection circuit, and an MCU / logic processing unit, and the first liquid level detection module and the second liquid level detection module do not contact the liquid in the sewage tank and the clean water tank; The first liquid level detection module and the second liquid level detection module detect the liquid level information in the clean water tank and the sewage holding chamber respectively, and the first liquid level detection module and the second liquid level detection module transmit the detected liquid level information to the main control module respectively.

2. A non-contact liquid level detection cleaning device according to claim 1, characterized in that: The sensor includes: a conductive metal sheet, a spring, a conductive adhesive tape, a conductive cotton or a thermistor.

3. A non-contact liquid level detection cleaning device according to claim 2, characterized in that: The capacitor liquid level detection circuit MCU / logic processing unit is constructed by separately building an independent detection chip and a single-chip microcomputer, or packaging them together to form a capacitor liquid level detection chip.

4. A non-contact liquid level detection cleaning device according to claim 3, characterized in that: The conductive metal sheet or spring is sleeved on the clean water tank and the sewage holding chamber. The conductive metal sheet or spring is provided with contacts, which are electrically connected to the capacitive liquid level detection circuit. Whether there is liquid in the clean water tank and the sewage holding chamber is detected by the change of the conductive metal sheet or spring's own capacitance.

5. The non-contact liquid level detection cleaning device according to claim 3, characterized in that: The conductive tape or conductive cotton is pasted on the clean water tank and the sewage holding chamber, and is electrically connected to the capacitive liquid level detection circuit, and detects whether there is liquid in the clean water tank and the sewage holding chamber through changes in the capacitance of the conductive tape or conductive cotton itself.

6. The non-contact liquid level detection cleaning device according to claim 3, characterized in that: The clean water tank and the sewage tank are insulating medium boxes, including rubber pipes, plastic pipes, glass boxes or plastic-glass boxes, which are boxes used for liquid circulation and storage.

7. The non-contact liquid level detection cleaning device according to claim 3, characterized in that: The sensor detects whether liquid flows through the clean water tank and the sewage holding chamber, analyzes and processes the liquid information in the clean water tank and the sewage holding chamber through the capacitive liquid level detection chip, and then uploads the information to the main control module.

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