CN220232279U

CN220232279U - Control circuit board for Internet of things water purifier

Info

Publication number: CN220232279U
Application number: CN202321607737.0U
Authority: CN
Inventors: 陈洪生
Original assignee: Zhengzhou Yuelong Electronic Technology Co ltd
Current assignee: Zhengzhou Yuelong Electronic Technology Co ltd
Priority date: 2023-06-21
Filing date: 2023-06-21
Publication date: 2023-12-22
Anticipated expiration: 2033-06-21

Abstract

The utility model discloses a control circuit board for a water purifier of the Internet of things, which is rectangular as a whole, wherein the outer contour of the upper half part of the control circuit board is arched, and fixing holes are distributed on the control circuit board; the back of the control circuit board is welded with a singlechip and an Internet of things module, the bottom edge of the control circuit board is provided with a water inlet valve socket, and a first core and a second core of the water inlet valve socket are respectively used for connecting a grounding end and a power end of the water inlet valve; the back of the control circuit board is provided with a water inlet valve control circuit, the water inlet valve control circuit comprises a water inlet control field effect tube, the drain electrode of the water inlet control field effect tube is electrically connected with a first core of a water inlet valve socket, the grid electrode of the water inlet control field effect tube is electrically connected with a water inlet control resistor and then is electrically connected with the water inlet control end of the singlechip, and the source electrode of the water inlet control field effect tube is grounded; the control circuit board has the characteristics of small volume and convenient installation; and be provided with thing networking module on control circuit board to conveniently carry out remote control.

Description

Control circuit board for Internet of things water purifier

Technical Field

The utility model relates to the field of water purifiers, in particular to a control circuit board for an Internet of things water purifier.

Background

Water purifier technology has been developed for a long time and has reached a relatively high level of technology. More and more water purifiers have increased the internet of things function, will graft high in the clouds intelligent control system, support the user to look over complete machine state, the quality of water condition, filter core life-span etc. of water purifier in real time through mobile device. Fig. 1 shows an internal waterway structure of a water purifier, and a control circuit board for an internet of things water purifier is designed for the water purifier to realize various electrical controls inside the water purifier.

Disclosure of Invention

The utility model provides a control circuit board for a water purifier of the Internet of things, which solves the problem that the water purifier shown in fig. 1 needs to be designed with the control circuit board matched with the control circuit board so as to realize the electrical control of the inside of the water purifier.

In order to solve the technical problems, the utility model adopts a technical scheme that a control circuit board for the water purifier of the Internet of things is provided, the whole control circuit board is rectangular, the upper half part of the control circuit board is arched, and fixing holes are distributed on the control circuit board; the back of the control circuit board is welded with a singlechip and an Internet of things module, and the singlechip is electrically connected with the Internet of things module; the bottom edge of the control circuit board is provided with a water inlet valve socket, the water inlet valve socket is a two-core socket, and a first core and a second core of the water inlet valve socket are respectively used for connecting a grounding end and a power end of the water inlet valve; a water inlet valve control circuit is laid on the back of the control circuit board, the water inlet valve control circuit comprises a water inlet control field effect tube, the drain electrode of the water inlet control field effect tube is electrically connected with a first core of a water inlet valve socket, the grid electrode of the water inlet control field effect tube is electrically connected with a water inlet control resistor and then is electrically connected with the water inlet control end of the singlechip, and the source electrode of the water inlet control field effect tube is grounded.

Preferably, the front side of the control circuit board is provided with a water production display circuit, the water production display circuit comprises a water production light-emitting diode, the anode of the water production light-emitting diode is electrically connected with the water production display control resistor and then connected with a first direct current power supply, and the cathode of the water production light-emitting diode is connected with the water production display control end of the singlechip.

Preferably, the bottom edge of the back of the control circuit board is welded with a raw water TDS sensor socket for connecting the raw water TDS sensor, the raw water TDS sensor socket is a two-core socket, a first core is used for connecting a power end of the raw water TDS sensor, and a second core is used for connecting a sampling end of the raw water TDS sensor.

Preferably, a flowmeter socket for connecting a flowmeter is welded at the bottom edge of the back surface of the control circuit board, the flowmeter socket is a three-core socket, a first core of the flowmeter socket is used for being electrically connected with a power end of the flowmeter and supplying power to the power end of the flowmeter, a second core of the flowmeter socket is used for being electrically connected with a metering output end of the flowmeter, and a third core of the flowmeter socket is used for being electrically connected with a grounding end of the flowmeter.

Preferably, a water leakage detection socket for connecting the water leakage detection sensor is welded at the bottom edge of the back surface of the control circuit board, a first core of the water leakage detection socket is used for being electrically connected with a sampling end of the water leakage detection sensor, and a second core of the water leakage detection socket is used for being electrically connected with a power end of the water leakage detection sensor.

Preferably, the back of the control circuit board is further provided with an alarm circuit, the alarm circuit comprises a buzzer, the positive electrode of the buzzer is electrically connected with a second direct current power supply, the negative electrode of the buzzer is electrically connected with the collector electrode of the alarm control triode, the base electrode of the alarm control triode is electrically connected with the alarm control end of the singlechip after being electrically connected with the first alarm voltage dividing resistor, and the base electrode of the alarm control triode is further electrically connected with the second alarm voltage dividing resistor and then grounded.

Preferably, the front side of the control circuit board is provided with a filter element service life display circuit, the filter element service life display circuit comprises a filter element service life light emitting diode, the anode of the filter element service life light emitting diode is electrically connected with a filter element service life display control resistor and then connected with a first direct current power supply, and the cathode of the filter element service life light emitting diode is connected with a filter element service life display control end of the singlechip.

Preferably, a booster pump socket is arranged at the bottom edge of the control circuit board, the booster pump socket is a two-core socket, and a first core and a second core of the booster pump socket are respectively used for connecting a grounding end and a power end of the booster pump; a booster pump control circuit is arranged on the back surface of the control circuit board, and the booster pump control circuit and the water inlet valve control circuit have the same composition.

Preferably, the bottom edge of the control circuit board is provided with a power socket, the power socket is a two-core socket, a first core of the power socket is used for being electrically connected with an anode of an external direct-current power supply, and a second core of the power socket is used for being electrically connected with a cathode of the external direct-current power supply.

Preferably, the power outlet, booster pump outlet, and inlet valve outlet are integrated on the same control master outlet.

The beneficial effects of the utility model are as follows: the utility model discloses a control circuit board for a water purifier of the Internet of things, which is rectangular as a whole, wherein the outer contour of the upper half part of the control circuit board is arched, and fixing holes are distributed on the control circuit board; the back of the control circuit board is welded with a singlechip and an Internet of things module, the bottom edge of the control circuit board is provided with a water inlet valve socket, and a first core and a second core of the water inlet valve socket are respectively used for connecting a grounding end and a power end of the water inlet valve; the back of the control circuit board is provided with a water inlet valve control circuit, the water inlet valve control circuit comprises a water inlet control field effect tube, the drain electrode of the water inlet control field effect tube is electrically connected with a first core of a water inlet valve socket, the grid electrode of the water inlet control field effect tube is electrically connected with a water inlet control resistor and then is electrically connected with the water inlet control end of the singlechip, and the source electrode of the water inlet control field effect tube is grounded; the control circuit board has the characteristics of small volume and convenient installation; and be provided with thing networking module on control circuit board to conveniently carry out remote control.

Drawings

FIG. 1 is a schematic diagram of an internal waterway structure of a water purifier according to the Internet of things;

fig. 2 is a schematic front view of a control circuit board for an internet of things water purifier according to the present utility model;

FIG. 3 is a schematic back view of a control circuit board for an Internet of things water purifier according to the present utility model;

FIG. 4 is a schematic diagram of a singlechip of a control circuit board for a water purifier of the Internet of things according to the utility model;

fig. 5 is a schematic view of an internet of things module of a control circuit board for an internet of things water purifier according to the present utility model;

FIG. 6 is a first portion of a communication circuit between a single chip microcomputer and an Internet of things chip in a control circuit board for an Internet of things water purifier according to the present utility model;

FIG. 7 is a second part of a communication circuit between a single chip microcomputer and the Internet of things in a control circuit board for a water purifier of the Internet of things according to the present utility model;

FIG. 8 is a first portion of another communication circuit between a single chip microcomputer and an Internet of things chip in a control circuit board for an Internet of things water purifier according to the present utility model;

FIG. 9 is a second portion of another communication circuit between a single chip microcomputer and the Internet of things in a control circuit board for an Internet of things water purifier according to the present utility model;

fig. 10 is a first part of a flow detection circuit in a control circuit board for an internet of things water purifier according to the present utility model;

FIG. 11 is a second portion of a flow detection circuit in a control circuit board for an Internet of things water purifier according to the present utility model;

FIG. 12 is a water outlet valve control circuit in a control circuit board for an Internet of things water purifier according to the present utility model;

fig. 13 is a raw water TDS detection circuit in a control circuit board for a water purifier of the internet of things according to the present utility model;

fig. 14 is a high voltage switching circuit in a control circuit board for a water purifier of the internet of things according to the present utility model;

fig. 15 is a water leakage detection circuit in a control circuit board for a water purifier of the internet of things according to the present utility model;

FIG. 16 is an alarm circuit in a control circuit board for an Internet of things water purifier according to the present utility model;

FIG. 17 is a display circuit in a control circuit board for an Internet of things water purifier according to the present utility model;

FIG. 18 is a power-on control circuit in a control circuit board for an Internet of things water purifier according to the present utility model;

fig. 19 is a schematic view of a SIM card holder in a control circuit board for a water purifier of the internet of things according to the present utility model;

fig. 20 is a power circuit in a control circuit board for a water purifier of the internet of things according to the present utility model.

Detailed Description

In order that the utility model may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings. Preferred embodiments of the present utility model are shown in the drawings. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used in this specification includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1, fig. 1 is a schematic diagram of an internal waterway structure of an internet of things water purifier, a filtering device is arranged in the internet of things water purifier, the filtering device comprises two stages of filter cores, namely a first stage filter core (PAC composite filter core 2) and a second stage filter core (reverse osmosis membrane filter core 7), and the two stages of filter cores are connected through a water pipe.

In the present utility model, raw water (tap water may be used) is passed through the PAC composite cartridge 2 and the reverse osmosis membrane cartridge 7, respectively, and pure water is outputted.

The PAC composite filter element 2 and the reverse osmosis membrane filter element 7 are connected with a raw water TDS sensor 4, the raw water TDS sensor 4 is used for detecting the TDS value of raw water, the raw water TDS sensor 4 is connected with a water inlet valve 5 through a water pipe, and the water inlet valve 5 can be remotely opened through the Internet of things. For example, after a user purchases the use right of the water purifier through the internet of things, the water inlet valve 5 can be opened.

The PAC composite filter element 2 and the raw water TDS sensor 4 are downwards connected with the low-pressure switch 3 through a water pipe, the low-pressure switch 3 is used for detecting the water pressure of raw water, and when the low-pressure switch 3 detects that the water pressure of raw water is lower than a set value, the water purifier of the Internet of things enters a water shortage state; the singlechip can remind the user to recharge through the internet of things module or remind the user to check whether the water inlet pipe connected with the purifier has a fault.

The raw water TDS sensor 4 is connected with a water inlet valve 5 through a water pipe, the water inlet valve 5 is connected with a booster pump 6 through a water pipe, and the booster pump 6 is used for increasing the pressure of raw water.

The back of the reverse osmosis membrane filter element 7 comprises two channels, and one channel is connected with a flushing valve 8 through a water pipe, so that self flushing of the reverse osmosis membrane filter element 7 can be realized; the other channel is connected to a flow meter 9 through a water pipe, and the flow meter 9 is used for metering the flow of pure water.

The flowmeter 9 is connected with the pure water TDS sensor 10 through a water pipe, and the pure water TDS sensor 10 is used for detecting the TDS value of pure water obtained after the filtration of the two-stage filter element.

The high-pressure switch 11 is connected to the pure water TDS sensor 10 through a water pipe, a pressure barrel can be arranged between the high-pressure switch 11 and the water outlet valve 1, the high-pressure switch 11 is used for detecting the internal water pressure of the pressure barrel, the high-pressure switch 11 is closed after the pressure is generated due to the fact that the pure water in the pressure barrel is continuously increased, otherwise, the high-pressure switch 11 is opened after the water pressure is reduced, and therefore the pressure barrel is guaranteed to be automatically closed after the pure water is filled. When the high-voltage switch 11 detects that the pressure value of the pressure barrel 12 reaches a set value, the water purifier of the Internet of things enters a water full state.

In the utility model, the control circuit board for the water purifier of the Internet of things can control the opening and closing of the water inlet valve 5, the flushing valve 8 and the water outlet valve 1 in fig. 1, detect the TDS value of raw water, detect the TDS value of pure water, count the flow of the water purifier, control the opening and closing of the flushing valve 8, detect the water leakage phenomenon of the water purifier, and the like. The working state, the signal connection condition, the service life of the filter element and the like of the Internet of things water purifier can be checked. The control circuit board can also realize the control of various electronic components such as the low-voltage switch 3, the raw water TDS sensor 4, the water inlet valve 5, the booster pump 6, the water production display, the flowmeter 9, the water leakage detection circuit, the alarm circuit, the pure water TDS sensor 10, the high-voltage switch 11, the filter core service life display circuit and the like in the figure 1, and meets the requirements of the working principles of various circuits of the water purifier.

As shown in fig. 2, which is a front schematic view of a control circuit board, fig. 3, which is a back schematic view of the control circuit board, it can be seen that the control circuit board is rectangular as a whole, the outer contour of the upper half of the control circuit board is arched, fixing holes K are distributed on the control circuit board, and the fixing holes K are multiple, so that the control circuit board can be installed inside the internet of things water purifier through the fixing holes K.

The power supply of the control circuit board comprises a first direct current power supply +5V, a second direct current power supply +24V and a third direct current power supply +1.8V. Specifically, the +24v of the second dc power supply is connected to the power socket at the bottom edge of the control circuit board, the power socket is a two-core socket, the first core is used for electrically connecting the positive electrode of the external dc power supply, and the second core is used for electrically connecting the negative electrode of the external dc power supply. The second direct current power supply is converted into the first direct current power supply +5V through a power supply circuit. The internet of things chip U3 outputs a third direct current power supply +1.8V through a power supply output end VDD_EXT.

Fig. 4 is a schematic diagram of a single chip microcomputer, fig. 5 is a schematic diagram of an internet of things chip, and in combination with fig. 6 to 9, communication interconnection between the single chip microcomputer U2 and the internet of things chip U3 is asynchronous serial port communication connection. In fig. 4, a first serial port readout end P05 of the single chip microcomputer U2 is electrically connected to a collector of the first control triode Q2 in fig. 9, a base of the first control triode Q2 is electrically connected to the first current limiting resistor R15, then is connected to a third direct current power supply +1.8v, and the third direct current power supply +1.8v is output from a power output end vdd_ext of the internet of things chip U3. The emitter of the first control triode Q2 is electrically connected with the serial writing end main_txd of the internet of things chip U3 in fig. 5.

As shown in fig. 6, in this embodiment, the first serial port readout end P05 of the single chip microcomputer U2 is further electrically connected to the first pull-up resistor R12 and then connected to the first direct current +5v.

The first serial port reading end P05 of the single chip microcomputer U2 can receive data from the internet of things chip U3, when the first serial port reading end P05 of the single chip microcomputer U2 outputs a low level, the first control triode Q2 is cut off, and the first serial port reading end P05 of the single chip microcomputer U2 stops receiving the data.

The first serial port writing end P04 of the singlechip in fig. 4 is electrically connected with the emitter of the second control triode Q1 in fig. 8, the base of the second control triode Q1 is electrically connected with the second current limiting resistor R10 and then is connected with the third direct current power supply +1.8v, and the collector of the second control triode Q1 is electrically connected with the serial port reading end MAI n_rxd of the internet of things chip U3 in fig. 5.

As shown in fig. 7, the serial port read end MAI n_rxd of the internet of things chip U3 is further electrically connected to the second pull-up resistor R13 and then connected to the third dc power supply +1.8v.

The serial port reading end MAI N_RXD of the Internet of things chip U3 can receive data from the singlechip U2, and when the serial port reading end MAI N_RXD of the Internet of things chip U3 outputs a low level, the second control triode Q1 is cut off, and the serial port reading end MAI N_RXD of the Internet of things chip U3 stops receiving data.

As shown in fig. 3, the back of the control circuit board is welded with a single chip microcomputer U2 and an internet of things chip U3, and the bottom edge of the back of the control circuit board comprises a plurality of sockets which are respectively used for connecting different functional modules.

With reference to fig. 3, 10 and 11, the flowmeter socket J5 is a three-core socket, the first core is used for electrically connecting with and supplying power to the power end of the flowmeter through a cable, the second core of the flowmeter socket J5 is used for electrically connecting with the metering output end of the flowmeter through a cable, and the third core of the flowmeter socket J5 is used for electrically connecting with the ground end of the flowmeter through a cable.

Specifically, on the control circuit board, the power end (the first core of the flowmeter socket J5) of the flowmeter 9 is electrically connected with the first dc power supply +5v, the ground end (the third core of the flowmeter socket J5) is grounded, the metering output end (the second core of the flowmeter socket J5) is electrically connected with the first flow detection resistor R26 and the second flow detection resistor R21, and then is connected with the first dc power supply +5v, and the electrical connection part of the first flow detection resistor R26 and the second flow detection resistor R21 is electrically connected with the flow sampling end P35 of the single chip microcomputer U2 in fig. 4.

The electric connection part of the first flow detection resistor R26 and the second flow detection resistor R21 is also electrically connected with the filter capacitor C13 and then grounded. When the water purifier of the Internet of things flows out water, the flowmeter can input signals to the singlechip U2 of FIG. 4 through the signal end, and the water yield is measured.

As shown in fig. 3 and 12, in this embodiment, the bottom edge of the control circuit board is provided with a water inlet valve socket, the water inlet valve socket is a two-core socket, and the first core and the second core of the water inlet valve socket are respectively used for connecting the ground end and the power end of the water inlet valve 5; the bottom edge of control circuit board is provided with supply socket, and supply socket is two core sockets, and supply socket's first core is used for the anodal of electric connection second DC power supply +24V, and supply socket's second core is used for the negative pole of electric connection outside DC power supply +24V.

In this embodiment, both the power outlet and the water inlet valve outlet are integrated on the control master outlet J6 in fig. 3, and the control master outlet J6 is a twelve-core outlet; from left to right, the first core and the second core of the total socket J6 are controlled to serve as power sockets; introducing an external direct current power supply +24V to the control circuit board to serve as a second direct current power supply +24V; the third core of the control master socket J6 represents the second core of the water inlet valve socket and is used for supplying power to the power end of the water inlet valve; the fifth core of the control aggregate outlet J6 represents the second core of the inlet valve outlet for controlling whether the negative electrode of the inlet valve is grounded.

In fig. 12, the water inlet valve control circuit comprises a water inlet control field effect tube Q8, the drain electrode of the water inlet control field effect tube Q8 is electrically connected with the first core of the water inlet valve socket (i.e. the ground end of the water inlet valve), the grid electrode of the water inlet control field effect tube Q8 is electrically connected with a water inlet control resistor R39 and then is electrically connected with a water inlet control end P25 of the singlechip U2 in fig. 4, and the source electrode of the water inlet control field effect tube Q8 is grounded.

In this embodiment, the power end of the water inlet valve (the second core of the water inlet valve socket) is always powered by the second dc power supply +24v, and when the water inlet control end P25 of the single-chip microcomputer U2 drives the water inlet control fet Q8 to be turned on, the first core of the water inlet valve socket (i.e., the ground end of the water inlet valve) is grounded, and the water inlet valve 5 is opened.

In fig. 4, the water inlet control end P25 of the singlechip is also electrically connected with a resistor R40 and a resistor R41 respectively and then grounded; the drain electrode of the water inlet control field effect transistor Q8 is electrically connected with the positive electrode of the protection diode D6, and the negative electrode of the protection diode D6 is connected with the second direct current power supply +24V. A filter capacitor C17 is also connected in series between the anode and the cathode of the protection diode D6.

Further, in this embodiment, the bottom edge of the control circuit board is further provided with a booster pump socket, the booster pump socket is a two-core socket, and the first core and the second core of the booster pump socket are respectively used for connecting the ground terminal and the power terminal of the booster pump; the fourth core and the sixth core of the control total socket J6 are used as booster pump sockets; the back of the control circuit board is also laid with a booster pump control circuit, and the booster pump control circuit and the water inlet valve control circuit have the same composition and are not described herein.

In the embodiment, a water outlet valve socket and a flushing valve socket are arranged at the bottom edge of the control circuit board, the water outlet valve socket and the flushing valve socket are two-core sockets, and a first core and a second core of the water outlet valve socket are respectively used for connecting a grounding end and a power end of a water outlet valve; the first core and the second core of the flushing valve socket are respectively used for connecting a grounding end and a power end of the flushing valve; the seventh core and the eighth core of the control total socket J6 are used as outlet valve sockets; the ninth core and the tenth core of the control total socket J6 are used as flushing valve sockets; the back of the control circuit board is also provided with a water outlet valve control circuit and a flushing valve control circuit which are the same as the water inlet valve control circuit in composition and are not described in detail herein.

As shown in fig. 3, fig. 4 and fig. 13, a raw water TDS sensor socket J3 for connecting the raw water TDS sensor 4 is welded at the bottom edge of the back surface of the control circuit board, the raw water TDS sensor socket J3 is a two-core socket, the first core is used for connecting the power end of the raw water TDS sensor 4, and the second core is used for connecting the sampling end of the raw water TDS sensor 4.

A raw water TDS detection circuit is laid on the back of the control circuit board, the raw water TDS detection circuit comprises a raw water detection triode Q3, a collector electrode of the raw water detection triode Q3 is electrically connected with a first core of a raw water TDS sensor socket J3, an emitter electrode of the raw water detection triode Q3 is electrically connected with a first direct current power supply +5V, and a base electrode of the raw water detection triode Q3 is electrically connected with a raw water detection resistor R23 and then is electrically connected with a raw water detection control end P13 of a singlechip U2; the second core of the raw water TDS sensor socket is electrically connected to the first sampling voltage dividing resistor R24 and then electrically connected to the raw water detection sampling end P14 of the single chip microcomputer U2 in fig. 4, and is electrically connected to the second sampling voltage dividing resistor R28 and then grounded.

When the singlechip controls the raw water control triode Q3 to be conducted, the raw water TDS sensor starts to sample the TDS value of the raw water, and a sampled signal is transmitted to the singlechip U2 through a sampling end of the raw water TDS sensor.

In this embodiment, the collector of the raw water detection transistor Q3 is further electrically connected to the resistor R19 and then grounded.

Further, the bottom edge of the back of the control circuit board is welded with a pure water TDS sensor socket J2 for connecting the pure water TDS sensor 10, the pure water TDS sensor socket J2 is a two-core socket, the first core is used for connecting the power end of the pure water TDS sensor 10, and the second core is used for connecting the sampling end P15 of the pure water TDS sensor 10.

The control circuit board is also provided with a pure water TDS detection circuit, and the pure water TDS detection circuit has the same composition as the raw water TDS detection circuit and is not described in detail herein.

In this embodiment, the eleventh core of the control total jack J6 is electrically connected to the high voltage switch 11, and in conjunction with fig. 14, the eleventh core of the control total jack J6 is connected to the high voltage switch signal input terminal P23 of the single chip microcomputer U2 in fig. 4 through the high voltage detection resistor R31, where the protection resistor R31 is further electrically connected to the filter capacitor C14 and then grounded.

Further, in this embodiment, the twelfth core of the control total socket J6 is electrically connected to the low voltage switch 3, and the twelfth core of the control total socket J6 is connected to the low voltage switch signal input terminal P22 of the single chip microcomputer U2 in fig. 4 through the low voltage detection resistor R32.

As shown in fig. 3, 4 and 15, a water leakage detection socket J4 for connecting the water leakage detection sensor is welded at the bottom edge of the back surface of the control circuit board, a first core of the water leakage detection socket J4 is used for being electrically connected with a sampling end of the water leakage detection sensor, and a second core of the water leakage detection socket J4 is used for being electrically connected with a power end of the water leakage detection sensor.

The back of the control circuit board is further provided with a water leakage detection circuit, the water leakage detection circuit comprises a first water leakage detection resistor R25 and a second water leakage detection resistor R20, a first end of the first water leakage detection resistor R25 is electrically connected with a first core of a water leakage detection socket J4, a second end of the first water leakage detection resistor R25 is electrically connected with a water leakage detection sampling end P20 of the singlechip U2, and a second end of the first water leakage detection resistor R25 is also connected with a second water leakage detection resistor and then grounded R30; the water leakage detection circuit further comprises a third water leakage detection resistor R18, the first end of the third water leakage detection resistor R18 is electrically connected with the second core of the water leakage detection socket, and the second end of the third water leakage detection resistor R18 is electrically connected with the water leakage detection control end P17 of the singlechip U2.

When the water leakage detection sensor detects that the water purifier leaks, a signal is sent to the singlechip through a sampling end (a first core of the water leakage detection socket J4) of the water leakage detection sensor.

Further, as shown in fig. 16, the control circuit of the internet of things for the water purifier further comprises an alarm circuit, the alarm circuit comprises a buzzer B1, the positive electrode of the buzzer B1 is electrically connected with a second direct current power supply +24v, and a resistor R33 is further connected in series between the positive electrode of the buzzer B1 and the second direct current power supply +24v; the negative electrode of the buzzer B1 is electrically connected with the collector electrode of the alarm control triode Q6, the base electrode of the alarm control triode Q6 is electrically connected with the first alarm voltage dividing resistor R38 and then is electrically connected with the alarm control end P12 of the singlechip U2 in FIG. 4, and the base electrode of the alarm control triode Q6 is also electrically connected with the second alarm voltage dividing resistor R42 and then is grounded. When the water purifier of the Internet of things is abnormal (such as water leakage), the singlechip controls the alarm control triode Q6 to be conducted, and the buzzer B1 starts alarm prompt.

In this embodiment, an alarm protection diode D7 is also connected between the positive and negative poles of the buzzer B1.

As shown in fig. 17, the control circuit board further includes a flushing display circuit, a water production display circuit, a signal display circuit, and a cartridge life display circuit.

The flushing display circuit comprises a flushing light diode VL1, the flushing light diode VL1 is arranged on the front side of the control circuit board, the positive electrode of the flushing light diode VL1 is electrically connected with a flushing display control resistor R5 and then connected with a first direct current power +5V, and the negative electrode of the flushing light diode VL1 is connected with a flushing display control end P02 of the singlechip in FIG. 4. When the water purifier of the Internet of things enters a flushing state or automatically enters the flushing state, the flushing light emitting diode VL1 flashes.

The water production display circuit comprises a water production light emitting diode VL2, wherein the anode of the water production light emitting diode VL2 is electrically connected with a water production display control resistor R6 and then connected with a first direct current power +5V, and the cathode of the water production light emitting diode VL2 is connected with a water production display control end P47 of the singlechip in FIG. 4. When the water outlet valve is controlled to be opened by the singlechip U2, the negative electrode of the water making light emitting diode VL2 is controlled to be grounded by the water making display control end P47 of the singlechip in FIG. 4, and the water making light emitting diode VL2 also emits light to display, so that the water purifier is flowing out of purified water.

The signal display circuit comprises a signal light emitting diode VL3, wherein the anode of the signal light emitting diode VL3 is electrically connected with a signal display control resistor R7 and then connected with a first direct current +5V, and the cathode of the signal light emitting diode VL3 is connected with a signal display control end P11 of a singlechip U2 in FIG. 4; in a network connection state (namely when the singlechip is connected with the internet of things module), the signal light emitting diode VL3 flashes, and when the network connection is successful, the signal light emitting diode VL3 is always on.

The filter element life display circuit comprises a filter element life light-emitting diode VL4 and a filter element life light-emitting diode VL5, which correspond to the PAC composite filter element 2 and the reverse osmosis membrane filter element 7 respectively.

The anodes of the filter element life light-emitting diode VL4 and the filter element life light-emitting diode VL5 are electrically connected with a filter element life control resistor R8 and a filter element life control resistor R9 and then connected with a first direct current power +5V, the cathodes of the filter element life light-emitting diode VL4 and the filter element life light-emitting diode VL5 are respectively connected with a filter element life display control end P21 and a filter element life display control end P24 of a singlechip U2 in FIG. 4 in a corresponding manner, and when the PAC composite filter element 2 and a reverse osmosis membrane filter element 7 are in the life period, the filter element life light-emitting diode VL4 and the filter element life light-emitting diode VL5 are always bright; when the service life of the filter element is 0, the light-emitting diode corresponding to the service life of the filter element is extinguished, and the alarm is given through the Internet of things module to prompt a user to replace the filter element.

As shown in fig. 18, the control circuit board further includes a power-on control circuit for powering on the internet of things chip U3, the power-on control circuit includes a power-on control MOS transistor Q5, a source electrode of the power-on control MOS transistor Q5 is connected to a wireless communication power source vcc_gprs, a gate electrode is electrically connected to a power-on control terminal P27 of the single chip microcomputer U2 in fig. 4, and a drain electrode is electrically connected to a power supply pin VBAT of the internet of things chip U3.

During normal operation, the singlechip U2 controls the power-on control MOS tube Q5 to be conducted and then supplies power to the Internet of things chip U3; and after the singlechip U2 controls the power-on control MOS tube Q5 to cut off, the power supply of the internet of things chip U3 is disconnected, and then the singlechip U2 controls the power-on control MOS tube Q5 to be conducted again, so that the power supply of the internet of things chip U3 is realized, the power-on control of the internet of things chip U3 can be realized again, the restarting operation of the internet of things chip U3 is realized, and the use reliability of the internet of things chip U3 is ensured.

In this embodiment, the connection between the source electrode of Q5 of the power-on control MOS transistor and the wireless communication power source vcc_gprs is electrically connected to a polar capacitor C18 and then grounded; in fig. 4, a power-on control end P27 of the single chip microcomputer U2 is electrically connected to a first power-on voltage dividing resistor R36, a second power-on voltage dividing resistor R34, and a third power-on voltage dividing resistor R15 is connected to an electrical connection position between a Q5 source of the power-on control MOS transistor and a wireless communication power supply vcc_gprs; the analog power supply pin VBAT of the Internet of things chip U3 with the drain electrode electrically connected is respectively electrically connected with the filter capacitor C19 and the filter capacitor C20 and then grounded.

Referring to fig. 5 and 19, the internet of things chip U3 is electrically connected to the SIM card. As shown in fig. 5, the SIM card is fixed in the SIM card holder and electrically connected to the internet of things chip U3. The power supply terminal sim_vdd of the SIM card holder in fig. 19 is connected to the sim_vdd pin of the internet of things chip U3 in fig. 5, and is further electrically connected to the capacitor C6 and then grounded; after the SIM_RST at the reset end is connected with the resistor R1, the SIM_RST pin of the chip U3 of the Internet of things in FIG. 5 is accessed; after the clock end SIM_CLK is connected with the resistor R2, the clock end SIM_CLK is connected to the SIM_CLK pin of the chip U3 of the Internet of things in FIG. 5; the I/0 terminal SIM_IO is connected to the SIM_DATA pin of the IOT chip U3 in FIG. 5 through the electric connection resistor R3, and is also connected to the pull-up resistor R4 and then connected to the power supply terminal SIM_VDD.

As shown in fig. 20, which shows a power circuit, the input terminal I N of the chip XL1509-5V inputs the second dc power +24v and the output terminal OUT inputs the first dc power +5v.

Specifically, an input end I N of the chip XL1509-5V is electrically connected with the thermistor RT1 and then connected with the negative electrode of the power input protection diode D1, and the positive electrode of the power input protection diode D1 is electrically connected with the second direct current power supply +24V; the input terminal I N of the chip XL1509-5V is also electrically connected to the polarity filter capacitor C1 and the filter capacitor C2 and then grounded.

The output end OUT of the chip XL1509-5V is electrically connected with the inductor L1 and then is connected with one end of the protection resistor F1, the other end of the protection resistor F1 outputs a first direct current power supply +5V, and the first direct current power supply +5V is also respectively electrically connected with the filter capacitor C4 and the filter capacitor C5 and then is grounded.

Preferably, the output end OUT of the chip XL1509-5V is also electrically connected with a power supply, input into the protection diode D4 and then grounded, and the electric connection part of the inductor L1 and the protection resistor F2 is electrically connected with the filter capacitor C7 and the filter capacitor C3 and then grounded. The feedback end FB of the chip XL1509-5V is electrically connected to the electric connection part of the inductor L1 and the protection resistor F2, and the feedback end FB of the chip XL1509-5V is also electrically connected with the input power protection diodes D2 and D3 and then outputs a wireless communication power supply VCC_GPRS.

The foregoing is only illustrative of the present utility model and is not to be construed as limiting the scope of the utility model, and all equivalent structural changes made by the present utility model and the accompanying drawings, or direct or indirect application in other related technical fields, are included in the scope of the present utility model.

Claims

1. A control circuit board for thing networking purifier, its characterized in that: the whole control circuit board is rectangular, the outline of the upper half part of the control circuit board is arched, and fixing holes are distributed on the control circuit board; the back of the control circuit board is welded with a singlechip and an Internet of things module, and the singlechip is electrically connected with the Internet of things module; the bottom edge of the control circuit board is provided with a water inlet valve socket, the water inlet valve socket is a two-core socket, and a first core and a second core of the water inlet valve socket are respectively used for connecting a grounding end and a power end of the water inlet valve; the back of the control circuit board is provided with a water inlet valve control circuit, the water inlet valve control circuit comprises a water inlet control field effect tube, the drain electrode of the water inlet control field effect tube is electrically connected with the first core of the water inlet valve socket, the grid electrode of the water inlet control field effect tube is electrically connected with a water inlet control resistor and then is electrically connected with the water inlet control end of the singlechip, and the source electrode of the water inlet control field effect tube is grounded.

2. The control circuit board for an internet of things water purifier as set forth in claim 1, wherein: the front of the control circuit board is provided with a water production display circuit, the water production display circuit comprises a water production light emitting diode, the positive electrode of the water production light emitting diode is electrically connected with a water production display control resistor and then connected with a first direct current power supply, and the negative electrode of the water production light emitting diode is connected with a water production display control end of the singlechip.

3. The control circuit board for an internet of things water purifier as set forth in claim 2, wherein: the bottom edge welding at control circuit board back has the raw water TDS sensor socket that is used for connecting raw water TDS sensor, raw water TDS sensor socket is two core sockets, and its first core is used for connecting raw water TDS sensor's power end, and the second core is used for connecting raw water TDS sensor's sampling end.

4. The control circuit board for an internet of things water purifier according to claim 3, wherein: the bottom edge welding at control circuit board back has the flowmeter socket that is used for connecting the flowmeter, the flowmeter socket is three core sockets, and wherein, the first core of flowmeter socket is used for the power end of electricity connection flowmeter and supplies power to it, the second core of flowmeter socket is used for the measurement output of electricity connection flowmeter, the third core of flowmeter socket is used for the earthing terminal of electricity connection flowmeter.

5. The control circuit board for an internet of things water purifier as recited in claim 4, wherein: the water leakage detection socket used for being connected with the water leakage detection sensor is welded on the bottom edge of the back surface of the control circuit board, a first core of the water leakage detection socket is used for being electrically connected with a sampling end of the water leakage detection sensor, and a second core of the water leakage detection socket is used for being electrically connected with a power end of the water leakage detection sensor.

6. The control circuit board for an internet of things water purifier as set forth in claim 5, wherein: the alarm circuit comprises a buzzer, wherein the positive electrode of the buzzer is electrically connected with a second direct-current power supply, the negative electrode of the buzzer is electrically connected with the collector electrode of an alarm control triode, the base electrode of the alarm control triode is electrically connected with a first alarm voltage dividing resistor and then is electrically connected with the alarm control end of the singlechip, and the base electrode of the alarm control triode is electrically connected with the second alarm voltage dividing resistor and then is grounded.

7. The control circuit board for an internet of things water purifier as set forth in claim 1, wherein: the front of the control circuit board is provided with a filter core life display circuit, the filter core life display circuit comprises a filter core life light-emitting diode, the anode of the filter core life light-emitting diode is electrically connected with a filter core life display control resistor and then connected with a first direct current power supply, and the cathode of the filter core life light-emitting diode is connected with a filter core life display control end of the singlechip.

8. The control circuit board for an internet of things water purifier according to any one of claims 1 to 7, wherein: the bottom edge of the control circuit board is provided with a booster pump socket, the booster pump socket is a two-core socket, and a first core and a second core of the booster pump socket are respectively used for connecting a grounding end and a power end of the booster pump; a booster pump control circuit is arranged on the back surface of the control circuit board, and the booster pump control circuit and the water inlet valve control circuit have the same composition.

9. The control circuit board for an internet of things water purifier of claim 8, wherein: the bottom edge of control circuit board is provided with supply socket, supply socket is two core sockets, supply socket's first core is used for the positive pole of outside DC power supply of electricity connection, supply socket's second core is used for the negative pole of outside DC power supply of electricity connection.

10. The control circuit board for an internet of things water purifier of claim 9, wherein: the power socket, the booster pump socket and the water inlet valve socket are integrated on the same control main socket.