An electric nasal irrigator with automatic water shortage detection and constant water spray

Abstract

The utility model discloses an electric nasal cavity flusher with automatic water shortage detection and constant water spraying, comprising: a battery V-bat; a water pump, one input end of the water pump is electrically connected with the battery V-bat; a current detection circuit, one input end of the current detection circuit is electrically connected with another input end of the water pump; a main control circuit, an input end of the main control circuit is electrically connected with an output end of the current detection circuit; a PWM control circuit, an input end of the PWM control circuit is electrically connected with an output end of the main control circuit, and output ends of the PWM control circuit are electrically connected with another input end of the current detection circuit respectively.

Description

Technical Field

[0001] This utility model relates to the field of nasal irrigator technology, specifically an electric nasal irrigator with automatic water shortage detection and constant water spray. Background Technology

[0002] A nasal irrigator is a tool used to clean the nasal cavity, mainly to remove pathogens and dirt from the nasal cavity and help restore the normal physiological environment of the nasal cavity;

[0003] Traditional nasal irrigators lack a water shortage detection function, and the water pump continues to work even when the water tank is low, which reduces the lifespan of the water pump. In addition, traditional nasal irrigators are directly powered by lithium batteries, and the water pump's operating voltage differs significantly when the battery is fully charged and when it is low, resulting in different output power and thus different water spray speeds. Utility Model Content

[0004] The purpose of this invention is to provide an electric nasal irrigator with automatic water shortage detection and constant water spray. It uses real-time detection of battery voltage and adjusts the duty cycle of the water pump according to the voltage value to ensure a constant water spray speed.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an electric nasal irrigator with automatic water shortage detection and constant water spray, comprising:

[0006] Battery V-bat;

[0007] A water pump, one input terminal of which is electrically connected to the battery V-bat;

[0008] A current detection circuit, wherein one input terminal of the current detection circuit is electrically connected to the other input terminal of the water pump;

[0009] The main control circuit, wherein the input terminal of the main control circuit is electrically connected to the output terminal of the current detection circuit;

[0010] A PWM control circuit, wherein the input terminal of the PWM control circuit is electrically connected to the output terminal of the main control circuit, and the output terminal of the PWM control circuit is electrically connected to the other input terminal of the current detection circuit.

[0011] A voltage sampling circuit is used to sample the battery V-bat voltage and input the collected voltage to the main control circuit.

[0012] As a further improvement to the above technical solution: the main control circuit includes a GD32E230F8P6 chip and peripheral circuits of the GD32E230F8P6 chip.

[0013] As a further improvement to the above technical solution: the current detection circuit includes: sampling resistor R20, resistor R21, resistor R27, resistor R26, resistor R22, and operational amplifier U4; one end of the sampling resistor R20 is electrically connected to one input terminal of the water pump, and is also electrically connected to the non-inverting input of operational amplifier U4 via resistor R27; one end of resistor R21 is electrically connected to the other end of the sampling resistor R20, and the other end of resistor R21 is electrically connected to the inverting input of operational amplifier U4; one end of resistor R26 is electrically connected to the non-inverting input of operational amplifier U4, and the other end of resistor R26 is grounded; resistor R22 is electrically connected to both the inverting input and the output terminal of operational amplifier U4; the output terminal of operational amplifier U4 is electrically connected to pin 8 of the GD32E230F8P6 chip.

[0014] As a further improvement to the above technical solution: the PWM control circuit includes a Water-Ctrl, a resistor R19, and a field-effect transistor Q3; the Water-Ctrl is electrically connected to pin 10 of the GD32E230F8P6 chip, and the Water-Ctrl is electrically connected to the gate of the field-effect transistor Q3 via the resistor R19. The source of the field-effect transistor Q3 is grounded, and the drain of the field-effect transistor Q3 is electrically connected to the other input terminal of the resistor R20 and the other input terminal of the resistor R21, respectively.

[0015] As a further improvement to the above technical solution: the voltage sampling circuit includes resistor R10 and resistor R12. One end of resistor R10 is electrically connected to the battery V-bat, and the other end of resistor R10 is grounded through resistor R12. The common point where the other end of resistor R10 and resistor R12 are connected is electrically connected to pin 11 of the GD32E230F8P6 chip.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] (1) This utility model collects the working current of the water pump through the current detection circuit, converts the current into a voltage signal, and sends it to the main control circuit for judgment. When the working current of the water pump is lower than the preset threshold, it sends a signal to the main control circuit to indicate that the water pump is in a water shortage state. In addition, the voltage sampling circuit is responsible for real-time detection of the battery V-bat voltage. It converts the battery voltage into a signal suitable for the main control circuit to process, and adjusts the output of the PWM control circuit according to the change of the battery V-bat voltage to maintain the constant water pump spraying speed. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the circuit working principle of this utility model;

[0019] Figure 2This is a circuit flowchart of the present invention. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicating orientation or position, are based on the orientation or positional relationships shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figure 1 , Figure 2 As shown, an electric nasal irrigator with automatic water shortage detection and constant water spray in this embodiment includes:

[0025] Battery V-bat;

[0026] A water pump, one input terminal of which is electrically connected to the battery V-bat;

[0027] A current detection circuit, wherein one input terminal of the current detection circuit is electrically connected to the other input terminal of the water pump;

[0028] The main control circuit, wherein the input terminal of the main control circuit is electrically connected to the output terminal of the current detection circuit;

[0029] A PWM control circuit, wherein the input terminal of the PWM control circuit is electrically connected to the output terminal of the main control circuit, and the output terminal of the PWM control circuit is electrically connected to the other input terminal of the current detection circuit.

[0030] A voltage sampling circuit is used to sample the battery V-bat voltage and input the collected voltage to the main control circuit.

[0031] Specifically, the main control circuit is the control core of the nasal irrigator, responsible for coordinating and controlling the work of other circuits. It receives signals from the water pump current detection circuit and voltage sampling circuit, and adjusts the output of the PWM control circuit according to these signals to achieve a constant water spray speed and automatic water shortage detection.

[0032] The PWM control circuit is responsible for controlling the water pump's spray speed. It receives instructions from the main control circuit and adjusts the duty cycle of the PWM signal according to the instructions to control the water pump's speed. The design of the PWM control circuit ensures that the water pump's spray speed remains constant under different battery voltages.

[0033] The water pump is the main actuating component of the nasal irrigator, responsible for drawing water from the tank and spraying it into the nasal cavity; the design of the water pump needs to take into account both efficiency and durability to ensure that it can maintain good performance even after long-term use.

[0034] The current detection circuit is responsible for detecting the operating current of the water pump. It samples the operating current of the water pump and converts it into a voltage signal for the main control circuit to process. When the operating current of the water pump is lower than the preset threshold, the current detection circuit will send a signal to the processor unit, indicating that the water pump is in a water shortage state.

[0035] The voltage sampling circuit is responsible for detecting the battery V-bat voltage in real time. It converts the battery voltage into a signal suitable for processing by the main control circuit, and adjusts the output of the PWM control circuit in conjunction with the changes in the battery V-bat voltage to maintain a constant water pump spraying speed.

[0036] In this embodiment: the main control circuit includes a GD32E230F8P6 chip and peripheral circuitry for the GD32E230F8P6 chip; the current detection circuit includes: sampling resistor R20, resistor R21, resistor R27, resistor R26, resistor R22, and operational amplifier U4; one end of the sampling resistor R20 is electrically connected to one input terminal of the water pump, and is also electrically connected to the non-inverting input of the operational amplifier U4 via resistor R27; one end of resistor R21 is electrically connected to the other end of the sampling resistor R20, and the other end of resistor R21 is electrically connected to the inverting input of the operational amplifier U4; one end of resistor R26 is electrically connected to the non-inverting input of the operational amplifier U4, and the other end of resistor R26 is grounded; resistor R22 is connected to both the inverting input and the input of the operational amplifier U4. The output terminals are electrically connected; the output terminal of the operational amplifier U4 is electrically connected to pin 8 of the GD32E230F8P6 chip; the PWM control circuit includes a Water-Ctrl, a resistor R19, and a field-effect transistor Q3; the Water-Ctrl is electrically connected to pin 10 of the GD32E230F8P6 chip, the Water-Ctrl is electrically connected to the gate of the field-effect transistor Q3 via resistor R19, the source of the field-effect transistor Q3 is grounded, and the drain of the field-effect transistor Q3 is electrically connected to the other input terminals of resistor R20 and resistor R21 respectively; the voltage sampling circuit includes resistors R10 and R12, one end of resistor R10 is electrically connected to the battery V-bat, and the other end of resistor R10 is grounded via resistor R12; the common point connecting the other end of resistor R10 and resistor R12 is electrically connected to pin 11 of the GD32E230F8P6 chip;

[0037] The sampling resistor R20 is used to collect the operating current of the water pump and process it through the operational amplifier U4. When the current is less than the set threshold, it outputs a voltage signal to the GD32E230F8P6 chip. After processing, the GD32E230F8P6 chip outputs the signal to the corresponding display circuit to indicate that the water pump is short of water, so that the water can be replenished in a timely manner. The operational amplifier U4 is model RS321BXF.

[0038] Additionally, when powered on, the voltage of the battery V-bat is collected through resistors R10 and R12 and fed back to the GD32E230F8P6 chip. Based on the feedback signal, the GD32E230F8P6 chip adjusts the output of the PWM on pin 10 in a timely manner and controls the speed of the water pump through the field-effect transistor, thereby ensuring a constant water spraying speed.

[0039] The above description is merely an embodiment of this utility model, and common knowledge regarding specific structures and characteristics is not described in detail here. It will be apparent to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An electric nasal irrigator with automatic water shortage detection and constant water spray, characterized in that, include: Battery V-bat; A water pump, one input terminal of which is electrically connected to the battery V-bat; A current detection circuit, wherein one input terminal of the current detection circuit is electrically connected to the other input terminal of the water pump; The main control circuit, wherein the input terminal of the main control circuit is electrically connected to the output terminal of the current detection circuit; A PWM control circuit, wherein the input terminal of the PWM control circuit is electrically connected to the output terminal of the main control circuit, and the output terminal of the PWM control circuit is electrically connected to the other input terminal of the current detection circuit. A voltage sampling circuit is used to sample the battery V-bat voltage and input the collected voltage to the main control circuit.

2. The electric nasal irrigator with automatic water shortage detection and constant water spray according to claim 1, characterized in that: The main control circuit includes a GD32E230F8P6 chip and peripheral circuitry for the GD32E230F8P6 chip.

3. The electric nasal irrigator with automatic water shortage detection and constant water spray according to claim 2, characterized in that: The current detection circuit includes: sampling resistor R20, resistor R21, resistor R27, resistor R26, resistor R22, and operational amplifier U4; one end of sampling resistor R20 is electrically connected to one input terminal of the water pump, and is also electrically connected to the non-inverting input of operational amplifier U4 via resistor R27; one end of resistor R21 is electrically connected to the other end of sampling resistor R20, and the other end of resistor R21 is electrically connected to the inverting input of operational amplifier U4; one end of resistor R26 is electrically connected to the non-inverting input of operational amplifier U4, and the other end of resistor R26 is grounded; resistor R22 is electrically connected to both the inverting input and the output terminal of operational amplifier U4; the output terminal of operational amplifier U4 is electrically connected to pin 8 of the GD32E230F8P6 chip.

4. The electric nasal irrigator with automatic water shortage detection and constant water spray according to claim 3, characterized in that: The PWM control circuit includes a Water-Ctrl, a resistor R19, and a field-effect transistor Q3. The Water-Ctrl is electrically connected to pin 10 of the GD32E230F8P6 chip, and the Water-Ctrl is electrically connected to the gate of the field-effect transistor Q3 via the resistor R19. The source of the field-effect transistor Q3 is grounded, and the drain of the field-effect transistor Q3 is electrically connected to the other input terminal of the resistor R20 and the other input terminal of the resistor R21, respectively.

5. An electric nasal irrigator with automatic water shortage detection and constant water spray as described in claim 4, characterized in that: The voltage sampling circuit includes resistors R10 and R12. One end of resistor R10 is electrically connected to the battery V-bat, and the other end of resistor R10 is grounded through resistor R12. The common point connecting the other end of resistor R10 and resistor R12 is electrically connected to pin 11 of the GD32E230F8P6 chip.

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