Floor brush identification circuit and floor brush

Abstract

The utility model discloses a floor brush identification circuit and a floor brush, which are applied to a dust collector, the dust collector comprises a host and a floor brush interface, the floor brush identification circuit comprises a pulse generation circuit, and the pulse generation circuit is used for generating working current which changes along with a square wave period and sending the working current to the host. And the host is used for reading the current period of the working current and comparing the current period with a preset current period so as to determine the type of the ground brush. Working current which changes along with the square wave period is generated through the pulse generating circuit, a main machine of the dust collector identifies and confirms the type of the connected ground brush by identifying the current period, a control circuit does not need to be additionally arranged, and other connecting signal lines do not need to be additionally arranged either, that is, the ground brush is connected with the dust collector only through positive and negative power line connectors. The ground brush motors of different models are distinguished, so that the cost of additionally increasing related circuits of the ground brush is saved, and the ground brush with different motors can be accurately identified.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum cleaners, in particular to a floor brush identification circuit. Background Art

[0002] With the development of smart appliances, vacuum cleaners have entered more and more households. They use electric motors to drive the blades to rotate at high speed, generate negative air pressure in a sealed shell, and absorb dust. In the prior art, commonly used handheld vacuum cleaners often come with a variety of detachable brush heads, such as floor brushes, blanket brushes, bed brushes, water brushes, and so on. These brush heads all have a DC brushed motor, and some of these motors may be of the same model or different models. Different types of floor brushes have different working modes. Therefore, when using a vacuum cleaner, it is necessary to identify the type of floor brush in advance. Most vacuum cleaners on the market currently do not have a floor brush detection function. When users replace floor brushes, they cannot determine the type of floor brush to use, and cannot implement different working modes, which makes it inconvenient for users to use and leads to a poor user experience. Utility Model Content

[0003] In order to overcome the above disadvantages, the purpose of the present invention is to provide a method to solve the problems caused by the above background technology.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is a floor brush identification circuit, which is applied to a vacuum cleaner, the vacuum cleaner includes a host and a floor brush interface, and the floor brush identification circuit includes a pulse generating circuit, wherein: the pulse generating circuit is used to generate a working current that varies with a square wave period and send it to the host. The host is used to read the current period of the working current and compare the current with the preset current period to determine the type of the floor brush.

[0005] Furthermore, the pulse generating circuit includes a resistor R1, a resistor R2, a resistor R3, a capacitor C1, a capacitor C2 and a waveform generating chip U1. The floor brush interface includes an interface 1 and an interface 2. The waveform generating chip U1 includes 7 pins, and pin 1 is connected to the interface 1. Pin 5 connects the capacitor C2 to the interface 1. Pin 4 and pin 8 are both connected to the interface 2. Pin 7 is respectively connected to one end of the resistor R1 and one end of the resistor R2, the other end of the resistor R1 is connected to the interface 1, and the other end of the resistor R2 is connected to the capacitor C1 to the interface 1. Pin 2 and pin 6 are both connected to the node between the resistor R2 and the capacitor C1. Pin 3 is connected to one end of the resistor R3.

[0006] Furthermore, the pulse generating circuit further comprises a MOS transistor Q1 and a resistor R4. The gate of the MOS transistor Q1 is connected to the other end of the resistor R3, the source is connected to the interface 1, and the drain is connected to one end of the resistor R4. The other end of the resistor R4 is connected to the interface 2.

[0007] Furthermore, the model of the waveform generating chip U1 is NE555.

[0008] Furthermore, the MOS tube Q1 is an N-type MOS tube.

[0009] Furthermore, the resistance value of the resistor R3 is 100 ohms, and the resistance value of the resistor R4 is 5 ohms.

[0010] On the other hand, the technical solution adopted by the utility model is a floor brush, which is applied to a vacuum cleaner, wherein the vacuum cleaner includes a host and a floor brush interface, including a floor brush motor and the above-mentioned floor brush identification circuit. The two ends of the floor brush motor are respectively connected to the interface 1 of the floor brush interface and the interface 2 of the floor brush interface, so as to drive the floor brush to perform the dirt suction work.

[0011] Compared with the prior art, the beneficial effect of the current type sensor power supply circuit provided by the utility model is that by setting a floor brush identification circuit in the floor brush, after the floor brush is powered, its pulse generating circuit generates a square wave of a fixed frequency, and the MOS tube Q1 is periodically turned on to realize the current cycle change. The host of the vacuum cleaner identifies and confirms the type of the connected floor brush by identifying the current cycle, so that the host can identify different types of floor brushes through different current cycles. The problem that the type of floor brush currently in use cannot be judged in the prior art, and the vacuum cleaner cannot select the corresponding working mode according to the selected floor brush, which makes it inconvenient for users to use and the user experience is poor. In addition, the identification of the floor brush type can be realized at a lower cost, without the need to add an additional control circuit, and there is no need to add other connecting signal lines, that is, the floor brush is connected to the vacuum cleaner only through the positive and negative power line connectors to realize the distinction between different models of floor brush motors. This saves the cost of adding additional floor brush related circuits and can more accurately identify floor brushes with different motors.

[0012] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present utility model, nor are they intended to limit the scope of the present utility model. Other features of the present utility model will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a circuit diagram of an embodiment of the utility model;

[0014] In the figure:

[0015] 1- Floor brush; 2- Floor brush motor. DETAILED DESCRIPTION

[0016] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0017] refer to Figure 1 , Figure 1 A circuit schematic diagram of a floor brush identification circuit provided in an embodiment of the utility model is shown.

[0018] like Figure 1 As shown, the figure shows the technical solution provided by the present application, a floor brush identification circuit, applied to a vacuum cleaner, the vacuum cleaner includes a host and a floor brush interface, the floor brush identification circuit includes a pulse generating circuit, wherein: the pulse generating circuit is used to generate a working current that varies with the square wave period and send it to the host. The host is used to read the current period of the working current and compare the current with the preset current period to determine the type of floor brush 1.

[0019] The floor brush identification circuit provided by the present application generates a working current that varies with the square wave period through a pulse generating circuit. The host of the vacuum cleaner identifies and confirms the type of the connected floor brush 1 by identifying the current period, so that the host can identify different types of floor brushes 1 through different current periods. The identification of the type of floor brush 1 is achieved at a relatively low cost, without the need to add an additional control circuit, and without the need to add other connecting signal lines, that is, the floor brush 1 is only connected to the vacuum cleaner through the positive and negative power line connectors to distinguish between different models of floor brush motors 2. This not only saves the cost of adding additional circuits related to the floor brush 1, but also can more accurately identify floor brushes 1 with different motors.

[0020] In some embodiments, reference Figure 1 , the pulse generating circuit includes a resistor R1, a resistor R2, a resistor R3, a capacitor C1, a capacitor C2 and a waveform generating chip U1. The ground brush interface includes an interface 1 and an interface 2. The waveform generating chip U1 includes 7 pins, and pin 1 is connected to interface 1. Pin 5 is connected to capacitor C2 and connected to interface 1. Pin 4 and pin 8 are both connected to interface 2. Pin 7 is respectively connected to one end of resistor R1 and one end of resistor R2, the other end of resistor R1 is connected to interface 1, and the other end of resistor R2 is connected to capacitor C1 and connected to interface 1. Pin 2 and pin 6 are both connected to the node between resistor R2 and capacitor C1. Pin 3 is connected to one end of resistor R3.

[0021] The pulse generating circuit also includes a MOS transistor Q1 and a resistor R4. The gate of the MOS transistor Q1 is connected to the other end of the resistor R3, the source is connected to the interface 1, and the drain is connected to one end of the resistor R4. The other end of the resistor R4 is connected to the interface 2.

[0022] Specifically, the present application uses IC-NE555 to configure the peripheral circuit, which can generate the characteristics of a fixed frequency and fixed pulse width square wave. The host can complete the identification by adding a square wave load at the end of the ground brush 1. The square wave period is: T= (R1+2*R2)*C1*ln2, and the square wave duty cycle is: Q=(R1+R2) / (R1+2*R2). The resistance values ​​of resistors R1 and R2 are changed according to the needs, and different ground brushes 1 are set to different duty cycles or periods. After the ground brush 1 is powered, the MOS tube Q1 is turned on periodically to realize the current cycle change. The host identifies the current cycle to identify the type of ground brush 1. The identification of ground brush 1 has changed from the original passive current to the identification method of actively applying periodic current. The square wave current is superimposed on the power line. There is no need to add additional control circuits and other connecting signal lines. The period and frequency of the periodic current can be changed by modifying the resistors and capacitors. In theory, tens of thousands of non-repetitive matches can be expanded, that is, various types of ground brushes 1 are generated to adapt to hosts of different frequencies.

[0023] For example, Figure 1 Only an exemplary situation of detecting a floor brush 1 is shown. The values ​​of the resistors R1 and R2 in the floor brush identification circuit can be changed so that the waveform generating chip U1 outputs square waves of different frequencies, thereby changing the current cycle. Each time a combination is changed, it can be adapted to a type of floor brush 1.

[0024] In some embodiments, reference Figure 1 The model of the waveform generating chip U1 is NE555.

[0025] For example, the waveform generation chip NE555 is a widely used and quite common timing IC. It only needs a few resistors and capacitors to generate pulse signals of various frequencies required by digital circuits. Pin 1 is grounded (GND); Pin 2 is the trigger point (Trig), which is the time period that triggers NE555 to start it. The upper edge voltage of the trigger signal must be greater than 2 / 3 of VCC, and the lower edge must be lower than 1 / 3 of VCC; Pin 3 is the output port (Output). When the time period starts, the output pin of NE555 moves to a high potential that is 1.7 volts less than the power supply voltage. At the end of the cycle, the output returns to a low potential of about 0 volts, and the maximum output current at the high potential is about 200mA.

[0026] Pin 4 is the reset port (Rest). When a low logic potential is sent to this pin, the timer will be reset and the output will return to a low potential. It is usually connected to the positive power supply or ignored. Pin 5 is the control port (Cont). This pin allows the trigger and threshold voltage to be changed by an external voltage. When the timer operates in a stable or oscillating mode, this input can be used to change or adjust the output frequency. Pin 6 is the reset lock port (Thres). Pin6 resets the lock and makes the output low. This action is activated when the voltage of this pin moves from below 1 / 3 of the VCC voltage to above 2 / 3 of the VCC. Pin 7 is the discharge port (Disch). This pin has the same current output capability as the main output pin. When Pin3 is low, Pin7 is in a low impedance state to ground (conducting to ground). When Pin3 is high, Pin7 is in a high impedance state to ground. Pin 8 is the V + port (Vcc), which is the positive power supply voltage terminal of NE555. The supply voltage range is +4.5V (minimum) to +16V (maximum).

[0027] In some embodiments, reference Figure 1 MOS tube Q1 is an N-type MOS tube. The resistance value of resistor R3 is 100 ohms. The resistance value of resistor R4 is 5 ohms.

[0028] On the other hand, the present application also provides a technical solution, a floor brush 1, applied to a vacuum cleaner, the vacuum cleaner includes a host and a floor brush interface, including a floor brush motor 2 and a floor brush identification circuit described in the above multiple embodiments. The two ends of the floor brush motor 2 are respectively connected to the interface 1 of the floor brush interface and the interface 2 of the floor brush interface, so as to drive the floor brush 1 to perform dirt suction work.

[0029] The above implementation modes are only for illustrating the technical concept and features of the utility model, and their purpose is to allow people familiar with this technology to understand the content of the utility model and implement it. It cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A floor brush identification circuit, applied to a vacuum cleaner, the vacuum cleaner comprising a host and a floor brush interface, characterized in that: The floor brush identification circuit includes a pulse generating circuit, wherein: The pulse generating circuit is used to generate a working current that varies with the square wave period and send it to the host; The host is used to read the current cycle of the working current and compare the current with a preset current cycle, so as to determine the type of the floor brush.

2. The floor brush identification circuit according to claim 1, characterized in that: The pulse generating circuit includes resistor R1, resistor R2, resistor R3, capacitor C1, capacitor C2 and waveform generating chip U1; the floor brush interface includes interface 1 and interface 2; the waveform generating chip U1 includes 7 pins, pin 1 is connected to the interface 1; pin 5 is connected to the capacitor C2 and connected to the interface 1; pin 4 and pin 8 are both connected to the interface 2; pin 7 is respectively connected to one end of the resistor R1 and one end of the resistor R2, the other end of the resistor R1 is connected to the interface 1, and the other end of the resistor R2 is connected to the capacitor C1 and connected to the interface 1; pin 2 and pin 6 are both connected to the node between the resistor R2 and the capacitor C1; pin 3 is connected to one end of the resistor R3.

3. The floor brush identification circuit according to claim 2, characterized in that: The pulse generating circuit further includes a MOS tube Q1 and a resistor R4; the gate of the MOS tube Q1 is connected to the other end of the resistor R3, the source is connected to the interface 1, and the drain is connected to one end of the resistor R4; the other end of the resistor R4 is connected to the interface 2.

4. The floor brush identification circuit according to claim 2, characterized in that: The model of the waveform generating chip U1 is NE555.

5. The floor brush identification circuit according to claim 3, characterized in that: The MOS tube Q1 is an N-type MOS tube.

6. The floor brush identification circuit according to claim 3, characterized in that: The resistance value of the resistor R3 is 100 ohms; the resistance value of the resistor R4 is 5 ohms.

7. A floor brush, applied to a vacuum cleaner, the vacuum cleaner comprising a host and a floor brush interface, characterized in that: It comprises a floor brush motor and a floor brush identification circuit as described in any one of claims 1 to 6; the two ends of the floor brush motor are respectively connected to interface 1 of the floor brush interface and interface 2 of the floor brush interface, so as to drive the floor brush to perform sewage suction work.

Images