CN214380243U

CN214380243U - Integrated circuit for electric water pumping device and electric water pumping device

Info

Publication number: CN214380243U
Application number: CN202120562479.3U
Authority: CN
Inventors: 傅依勇; 张树喜; 付依政
Original assignee: Shenzhen Sp Microelectronics Co ltd
Current assignee: Shenzhen Sp Microelectronics Co ltd
Priority date: 2021-03-16
Filing date: 2021-03-16
Publication date: 2021-10-08
Anticipated expiration: 2031-03-16

Abstract

An integrated circuit for an electric water pump and the electric water pump comprise a battery connecting port, an EN port, a VOUT port, a first sampling circuit, a duration judging circuit, a first signal output circuit, a second sampling circuit and an output switch circuit. The integrated circuit that this application provided can be compatible long press with short press two kinds of mode for electronic water pumper can be compatible take the auto-lock and do not take the switch of auto-lock, possesses the commonality.

Description

Integrated circuit for electric water pumping device and electric water pumping device

Technical Field

The utility model relates to a ware technical field draws water, concretely relates to integrated circuit and electronic ware that draws water for electronic ware that draws water.

Background

The switch used for the electric water pumping device at present has two types of self-locking and non-self-locking. If the electric water pumping device uses a switch with self-locking, the electric water pumping device has two working modes of long pressing and short pressing: after the switch is pressed for a long time, the water pumping motor starts to pump water, and after the switch is released, the water pumping motor stops pumping water; the switch is pressed to release immediately, the water pumping motor pumps water for 30-60 seconds, and if the switch is pressed again during the water pumping of the water pumping motor, the water pumping motor stops pumping water. If the electric water pumping device uses a switch without self-locking, only the long-time pressing mode is as follows: after the switch is pressed down, the water pumping motor starts to pump water, and after the switch is released, the water pumping motor stops pumping water. However, the electric water pump circuit on the market is generally only suitable for one switch, and is not compatible with two different switches, so that the universality is poor.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a chip and electronic ware circuit that draws water for electronic ware can be compatible take the auto-lock and do not take the switch of auto-lock, possess the commonality.

According to a first aspect, an embodiment provides an integrated circuit for an electric water pump, including a battery connection port, an EN port, a VOUT port, a first sampling circuit, a duration determination circuit, a first signal output circuit, a second sampling circuit, and an output switch circuit;

the battery connection port comprises a BAT + port and a BAT-port and is used for connecting a battery to obtain battery voltage;

the EN port is used for connecting a key input module so that a user can input a key trigger signal through the key input module;

the VOUT port is used for connecting a water pumping motor;

the first sampling circuit comprises an input port and an output port, wherein the input port of the first sampling circuit is connected with the EN port and is used for acquiring a key trigger signal output by a user through the key input module from the EN port and outputting a continuous signal through the output port of the first sampling circuit when the key trigger signal is acquired;

the time length judging circuit comprises a first input port, a second input port, a first output port and a second output port, the first input port of the time length judging circuit is connected with the EN port, and the second input port of the time length judging circuit is connected with the output port of the first sampling circuit; the time length judging circuit is used for comparing the duration time length of the key trigger signal with a preset key time length; when the duration of the key trigger signal is greater than or equal to the preset key duration, the duration judging circuit continuously outputs a long-time pressing signal through a first output port of the duration judging circuit until a second input port of the duration judging circuit stops receiving the continuous signal output by the first sampling circuit; when the duration of the key trigger signal is less than the preset key duration, the duration judgment circuit outputs a short-press signal through a second output port of the duration judgment circuit;

the first signal output circuit comprises an input port and an output port, the input port of the first signal output circuit is connected with the first output port of the duration judging circuit and used for responding to the long pressing signal and outputting a first pumping driving signal through the output port of the duration judging circuit;

the second signal output circuit comprises an input port and an output port; the input port of the second signal output circuit is connected with the second output port of the duration judging circuit; the second signal output circuit is used for responding to the short press signal and outputting a second pumping driving signal through an output port of the second signal output circuit, the second pumping driving signal is used for enabling a pumping motor to pump water within a preset working time, and when the second signal output circuit receives the short press signal again within the preset working time, the second signal output circuit outputs a pumping stop signal through the output port of the second signal output circuit;

the second sampling circuit comprises an input port and an output port; an input port of the second sampling circuit is connected with an output port of a second signal output circuit, and an output port of the second sampling circuit is connected with a second input port of the second signal output circuit; the second sampling circuit is used for sampling a second pumping driving signal output by the second signal output circuit through the input port of the second sampling circuit and outputting a sampling signal; the sampling signal enables the second signal output circuit to stop outputting a second pumping driving signal;

the output switch circuit comprises a first port, a second port and a control port; a first port of the output switch circuit is connected with the BAT + port, a second port of the output switch circuit is connected with the VOUT port, and a control port of the output switch circuit is connected with an output port of the first signal output circuit and an output port of the second signal output circuit; the control port of the output switch circuit is used for acquiring the first pumping driving signal and the second pumping driving signal, and when the control port of the output switch circuit acquires the first pumping driving signal or the second pumping driving signal, the first port of the output switch circuit acquires the battery voltage from the BAT + port and transmits the battery voltage to the VOUT port through the second port of the output switch circuit so as to transmit the battery voltage to the pumping motor through the VOUT port for supplying power, so that the pumping motor pumps water; the control port of the output switch circuit is further used for acquiring the pumping stop signal, and when the control port of the output switch circuit acquires the pumping stop signal, the first port of the output switch circuit stops acquiring the battery voltage from the BAT + port so as to stop supplying power to the pumping motor and stop pumping the pumping motor.

In one possible implementation, the output switching circuit includes a MOS transistor Q1; the first pole of the MOS transistor Q1 is the first port of the output switch circuit, the second pole of the MOS transistor Q1 is the second port of the output switch circuit, and the control pole of the MOS transistor Q1 is the control port of the output switch circuit.

In one possible implementation, the integrated circuit further includes:

the VCC port is used for connecting a charging power supply;

a charge management circuit including an input port and an output port; the input port of the charging management circuit is connected with the BAT + port and the VCC port; the input port of the charging management circuit is used for acquiring a voltage signal of the charging power supply and comparing the battery voltage acquired from the BAT + port with a first preset voltage when the voltage signal of the charging power supply is acquired; when the battery voltage is lower than the first preset voltage, the charging management circuit outputs a charging driving signal through an output port of the charging management circuit; when the battery voltage is greater than or equal to the first preset voltage, the charging management circuit outputs a charging stop signal through an output port of the charging management circuit;

a charge switch circuit comprising a first port, a second port and a control port; a first port of the charging switch circuit is connected with the VCC port, a second port of the charging switch circuit is connected with the BAT + port, and a control port of the charging switch circuit is connected with an output port of the charging management circuit; the control port of the charging switch circuit is used for acquiring the charging driving signal, and when the control port of the charging switch circuit acquires the charging driving signal, the first port of the charging switch circuit acquires the voltage of the charging power supply from the VCC port and transmits the voltage to the BAT + port through the second port of the charging switch circuit so as to transmit the voltage of the charging power supply to a battery through the BAT + port for charging; the control port of the charging switch circuit is further used for acquiring the charging stop signal, and when the control port of the charging switch circuit acquires the charging stop signal, the first port of the charging switch circuit stops acquiring the voltage of the charging power supply from the VCC port and transmitting the voltage to the BAT + port, so that the battery stops charging.

In one possible implementation, the integrated circuit further includes:

the PROG port is used for connecting the resistor R2 and is grounded through the resistor R2; the PROG port acquires a comparison voltage signal from the resistor R2; the magnitude of the comparison voltage signal can be adjusted by changing the resistance value of the resistor R2;

a comparison circuit comprising an input port and an output port; the input port of the comparison circuit is connected with the PROG port, and the output port of the comparison circuit is connected with the charging management circuit; the input port of the comparison circuit is used for acquiring the comparison voltage signal and a reference voltage signal; the comparison circuit compares the comparison voltage signal with the reference voltage signal to obtain a comparison result, and outputs a level signal to the charge management circuit through an output port of the comparison circuit according to the comparison result; when the level signal output by the comparison circuit is at a high level, the charging management circuit sets the charging current to be a first charging current; when the level signal output by the comparison circuit is low level, the charging management circuit sets the charging current as a second charging current; the comparison circuit comprises a comparator B1, a resistor R1 and a current source I1; the input port of the comparator B1 is the input port of the comparison circuit, and the input port of the comparator B1 is also connected with the current source I1 and one end of the resistor R1; the other end of the resistor R1 is grounded; the output port of the comparator B1 is the output port of the comparison circuit.

In one possible implementation, the charge switch circuit includes a MOS transistor Q2; the first pole of the MOS transistor Q2 is the first port of the charging switch circuit, the second pole of the MOS transistor Q2 is the second port of the charging switch circuit, and the control pole of the MOS transistor Q2 is the control port of the charging switch circuit.

In one possible implementation, the integrated circuit further includes:

the CHRG port is used for connecting a light-emitting module;

a light emitting switch circuit comprising a first port, a second port, and a control port; a first port of the light-emitting switch circuit is grounded, a second port of the light-emitting switch circuit is connected with the CHRG port, and a control port of the light-emitting switch circuit is connected with the charging management circuit; the control port of the light-emitting switch circuit is used for acquiring a light-emitting driving signal output by the charging management circuit when the battery is charged, and the light-emitting switch circuit is conducted when the control port of the light-emitting switch circuit acquires the light-emitting driving signal, so that the second port of the light-emitting switch circuit supplies power to the light-emitting module through the CHRG port, and the light-emitting module emits light; the luminous switch circuit comprises a MOS tube Q3; the first pole of the MOS transistor Q3 is the first port of the lighting switch circuit, the second pole of the MOS transistor Q3 is the second port of the lighting switch circuit, and the control pole of the MOS transistor Q3 is the control port of the lighting switch circuit.

In one possible implementation, the integrated circuit further includes:

a GND port for grounding;

the overcharge/overdischarge management circuit comprises an input port and an output port; the input port of the overcharge/overdischarge management circuit is used for acquiring the voltage of the battery; the overcharge/overdischarge management circuit compares the battery voltage with a second preset voltage; when the battery voltage is greater than or equal to a second preset voltage, the overcharge/overdischarge management circuit outputs an overcharge protection signal through an output port of the overcharge/overdischarge management circuit; the overcharge/overdischarge management circuit is also used for comparing the battery voltage with a third preset voltage; when the battery voltage is less than or equal to a third preset voltage, the over-charge/over-discharge management circuit outputs an over-discharge protection signal through an output port of the over-charge/over-discharge management circuit;

the short circuit/overcurrent protection circuit comprises an input port and an output port; the input port of the short circuit/overcurrent protection circuit is used for acquiring the current of the battery; the short circuit/overcurrent protection circuit compares the battery current with a preset current; when the battery current is greater than or equal to the preset current, the short-circuit/overcurrent protection circuit outputs a short-circuit/overcurrent protection signal through an output port of the short-circuit/overcurrent protection circuit;

the protection switch circuit comprises a first port, a second port and a control port; the first port of the protection switch circuit is connected with the BAT-port; the second port of the protection switch circuit is grounded through the GND port, and the control port of the protection switch circuit is connected with the output port of the overcharge/overdischarge management circuit and the output port of the short-circuit/overcurrent protection circuit; the control port of the protection switch circuit is used for acquiring the overcharge protection signal, the overdischarge protection signal and the short circuit/overcurrent protection signal; the protection switch circuit is switched off when the control port of the protection switch circuit obtains the overcharge protection signal, the overdischarge protection signal or the short circuit/overcurrent protection signal, so that a battery loop is cut off, and the battery is prevented from being damaged.

In one possible implementation, the protection switch circuit includes a MOS transistor Q4; the first pole of the MOS transistor Q4 is the first port of the protection switch circuit, the second pole of the MOS transistor Q4 is the second port of the protection switch circuit, and the control pole of the MOS transistor Q4 is the control port of the protection switch circuit.

According to a second aspect, an embodiment provides an electric water drawer, which includes a water drawing motor for drawing water, a key input module for outputting a key trigger signal, and the above-mentioned integrated circuit.

In one possible implementation, the electric water drawer further includes:

a light emitting module for emitting light when the battery is charged; the light emitting module comprises a Light Emitting Diode (LED) 1 and a resistor R3; the cathode of the light emitting diode LED1 is connected to the CHRG port of the integrated circuit, and the anode of the light emitting diode LED1 is connected to the charging power supply through the resistor R3.

Implement the embodiment of the utility model provides a following beneficial effect has:

according to the integrated circuit for the electric water pump and the electric water pump, because the embodiment of the utility model discloses can respond to the key trigger signal that long-term pressing and the key trigger signal that short-term pressing respectively, when the user presses the switch for a long time to make the key input module output the key trigger signal for a duration that is greater than or equal to the preset key duration, can make the water pump motor begin to pump water, can make the water pump motor stop pumping water after the user loosens the switch; when a user presses the switch for a short time to enable the duration of the key input module to output the key trigger signal to be less than the preset key duration, the water pumping motor can pump water for the preset working duration, and if the switch is pressed for a short time again during the water pumping period of the water pumping motor, the water pumping motor can stop pumping water. Therefore, use the utility model discloses integrated circuit can be compatible long press with short press two kinds of mode for electronic water pumper can be compatible take the auto-lock and do not take the switch of auto-lock, possesses the commonality.

Drawings

FIG. 1 is a first schematic diagram of an integrated circuit according to an embodiment of the present disclosure;

FIG. 2 is a second schematic diagram of an integrated circuit according to an embodiment of the present disclosure;

FIG. 3 is a third schematic diagram of an integrated circuit according to an embodiment of the present disclosure;

FIG. 4 is a schematic diagram of an integrated circuit chip according to an embodiment of the present disclosure;

FIG. 5 is a first schematic structural diagram of an electric water pump according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of an electric water pump according to an embodiment of the present invention;

FIG. 7 is a third schematic structural view of the electric water pump of the present application in one embodiment;

fig. 8 is a fourth schematic structural diagram of the electric water pump according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.

Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "coupled", as used herein, includes both direct and indirect coupling, unless otherwise specified; the term "obtaining" as used herein includes both direct and indirect obtaining, unless otherwise specified.

Because the electric water pump circuit in the prior art can only be suitable for the switch with the auto-lock or the switch without the auto-lock, can not be compatible with two kinds of switches, so this application proposes an integrated circuit for electric water pump, can respond to the button trigger signal that long pressed and the button trigger signal that short pressed respectively, make integrated circuit receive long press or short press the button trigger signal time can control the pump motor respectively and carry out two kinds of different pump work, then this integrated circuit can compatible long press and short press two kinds of mode, make the electric water pump that uses this integrated circuit can be compatible with the switch with the auto-lock and not take the auto-lock.

Referring to fig. 1, in an embodiment, an integrated circuit for an electric water pump includes a battery connection port 110, an EN port 120, a VOUT port 130, a first sampling circuit 140, a duration determination circuit 150, a first signal output circuit 160, a second signal output circuit 170, a second sampling circuit 180, and an output switch circuit 190. Each block is explained in detail below.

The battery connection port 110 includes a BAT + port 111 and a BAT-port 112 for connecting a battery to obtain a battery voltage. The EN port 120 is used for connecting a key input module, so that a user can input a key trigger signal through the key input module. The VOUT port 130 is used to connect a pump motor.

The first sampling circuit 140 includes an input port and an output port. The input port of the first sampling circuit 140 is connected to the EN port 120, and is configured to collect a key trigger signal output by a user through the key input module from the EN port 120, and output a persistent signal through the output port thereof when the key trigger signal is collected.

The duration judging circuit 150 includes a first input port, a second input port, a first output port, and a second output port. A first input port of the duration judging circuit 150 is connected to the EN port 120, and a second input port of the duration judging circuit 150 is connected to an output port of the first sampling circuit 140. The duration judging circuit 150 is used for comparing the duration of the key trigger signal with a preset key duration; when the duration of the key trigger signal is greater than or equal to the preset key duration, the duration judging circuit 150 continuously outputs the long-time pressing signal through the first output port thereof until the second input port of the duration judging circuit 150 stops receiving the continuous signal output by the first sampling circuit 140; when the duration of the key trigger signal is less than the preset key duration, the duration determining circuit 150 outputs a short-press signal through the second output port thereof. It should be noted that it is a known technique in the art to compare the duration of the key activation signal with a preset key duration and to send different signals when the comparison results are different, and the present application does not improve this. The above-described function of the duration determination circuit 150 is a function of a comparison basis in a hardware circuit, i.e., a determination function, and is known to those skilled in the art, and may be implemented by, for example, a comparator; the specific hardware structure of the duration determination circuit 150 is not further limited in this application, and those skilled in the art can implement the duration determination circuit by using corresponding components according to the requirements and the cost.

The first signal output circuit 160 includes an input port and an output port. The input port of the first signal output circuit 160 is connected to the first output port of the duration judging circuit 150, and is configured to output the first pumping driving signal through the output port thereof in response to the long press signal. The output of a specific signal in response to a long press signal is a relatively basic function in a hardware circuit, and those skilled in the art know that it can be implemented by a transistor, for example, so that the specific hardware structure of the first signal output circuit 160 is not limited in this application, and those skilled in the art can implement the corresponding components according to the requirements and cost.

The second signal output circuit 170 includes an input port and an output port. An input port of the second signal output circuit 170 is connected to a second output port of the duration judging circuit 150. The second signal output circuit 170 is configured to output a second pumping driving signal through an output port thereof in response to the short press signal, the second pumping driving signal is configured to enable a pumping motor to pump water for a preset working time period, and when the second signal output circuit 170 receives the short press signal again within the preset working time period, the second signal output circuit 170 outputs a pumping stop signal through the output port thereof. In some embodiments, the preset working time period may be 30-60 seconds. Similar to the first signal output circuit 160, the second signal output circuit 170 may be implemented by a transistor, and therefore, the specific hardware structure of the second signal output circuit 170 is not limited in this application, and those skilled in the art may implement the corresponding components according to the requirements and the cost.

The second sampling circuit 180 includes an input port and an output port. An input port of the second sampling circuit 180 is connected to an output port of the second signal output circuit 170, and an output port of the second sampling circuit 180 is connected to a second input port of the second signal output circuit 170. The second sampling circuit 180 is configured to sample, through the input port thereof, the second pumping driving signal output by the second signal output circuit 170, and output a sampling signal; the sampling signal causes the second signal output circuit 170 to stop outputting the second pumping driving signal.

The output switch circuit 190 includes a first port, a second port, and a control port. A first port of the output switch circuit 190 is connected to the BAT + port 111, a second port of the output switch circuit 190 is connected to the VOUT port 130, and a control port of the output switch circuit 190 is connected to an output port of the first signal output circuit 160 and an output port of the second signal output circuit 170. The control port of the output switch circuit 190 is configured to obtain the first pumping driving signal and the second pumping driving signal, and when the control port obtains the first pumping driving signal or the second pumping driving signal, the first port obtains the battery voltage from the BAT + port 111 and transmits the battery voltage to the VOUT port 130 through the second port, so that the battery voltage is transmitted to the pumping motor through the VOUT port 130 to supply power, and the pumping motor pumps water. The control port of the output switch circuit 190 is further configured to obtain a pumping stop signal, and when the control port obtains the pumping stop signal, the first port stops obtaining the battery voltage from the BAT + port 111 to stop supplying power to the pumping motor to stop pumping water. Similarly, the output switch circuit 190 outputs corresponding signals according to different signals, which is also a function of a comparison basis in a hardware circuit, and those skilled in the art know that it can be implemented by, for example, transistors, and those skilled in the art can implement corresponding components according to factors such as requirements and cost.

For example, referring to fig. 3, in some embodiments, the output switch circuit 190 may include a MOS transistor Q1; a first terminal of the MOS transistor Q1 is a first port of the output switch circuit 190, a second terminal of the MOS transistor Q1 is a second port of the output switch circuit 190, and a control terminal of the MOS transistor Q1 is a control port of the output switch circuit 190.

Referring to fig. 2, in some embodiments, the integrated circuit for the electric water drawer may further include a VCC port 200, a PROG port 210, a CHRG port 220, a GND port 230, a charge management circuit 240, a charge switch circuit 250, a comparison circuit 260, a light-emitting switch circuit 270, an overcharge/overdischarge management circuit 280, a short circuit/overcurrent protection circuit 290, and a protection switch circuit 300.

The VCC port 200 is used for connecting a charging power source. In some embodiments, the charging power supply output voltage may be dc 5V. The PROG port 210 is connected to the resistor R2 and is grounded through the resistor R2; the PROG port 210 obtains a comparison voltage signal from the resistor R2; the magnitude of the comparison voltage signal can be adjusted by changing the magnitude of the resistance of the resistor R2. The CHRG port 220 is used to connect to a lighting module. GND port 230 is used for ground.

The charge management circuit 240 includes an input port and an output port. The input port of the charge management circuit 240 is connected to the BAT + port 111 and the VCC port 200. The input port of the charge management circuit 240 is configured to obtain a voltage signal of the charging power supply, and compare the battery voltage obtained from the BAT + port 111 with a first preset voltage when obtaining the voltage signal of the charging power supply. When the battery voltage is less than the first preset voltage, the charging management circuit 240 outputs a charging driving signal through its output port; when the battery voltage is greater than or equal to the first preset voltage, the charge management circuit 240 outputs a charge stop signal through its output port. In some embodiments, the first preset voltage may be 4.2V.

The charge switch circuit 250 includes a first port, a second port, and a control port. A first port of the charge switch circuit 250 is connected to the VCC port 200, a second port of the charge switch circuit 250 is connected to the BAT + port 111, and a control port of the charge switch circuit 250 is connected to an output port of the charge management circuit 240. The control port of the charging switch circuit 250 is configured to obtain the charging driving signal, and when the control port obtains the charging driving signal, the first port obtains the voltage of the charging power supply from the VCC port 200 and transmits the voltage to the BAT + port 111 through the second port, so as to transmit the voltage of the charging power supply to the battery through the BAT + port 111 for charging. The control port of the charging switch circuit 250 is further configured to obtain a charging stop signal, and when the control port obtains the charging stop signal, the first port stops obtaining the voltage of the charging power from the VCC port 200 and transmitting the voltage to the BAT + port 111, so that the battery stops charging. Referring to fig. 3, in some embodiments, the charge switch circuit 250 may include a MOS transistor Q2; the first terminal of the MOS transistor Q2 is the first port of the charging switch circuit 250, the second terminal of the MOS transistor Q2 is the second port of the charging switch circuit 250, and the control terminal of the MOS transistor Q2 is the control port of the charging switch circuit 250.

The comparison circuit 260 includes an input port and an output port. The input port of the comparison circuit 260 is connected to the PROG port 210, and the output port of the comparison circuit 260 is connected to the charge management circuit 240. The input port of the comparator circuit 260 is used to obtain the comparison voltage signal and a reference voltage signal. The comparison circuit 260 compares the comparison voltage signal with the reference voltage signal to obtain a comparison result, and outputs a level signal to the charge management circuit 240 through an output port thereof according to the comparison result. When the level signal output by the comparing circuit 260 is at a high level, the charging managing circuit 240 sets the charging current to a first charging current; when the level signal output by the comparing circuit 260 is low, the charging managing circuit 240 sets the charging current to the second charging current. Referring to fig. 3, in some embodiments, the comparison circuit 260 includes a comparator B1, a resistor R1, and a current source I1. The input port of the comparator B1 is the input port of the comparison circuit 260, and the input port of the comparator B1 is further connected with one end of a current source I1 and a resistor R1; the other end of the resistor R1 is grounded; the output port of comparator B1 is the output port of comparison circuit 260.

The illumination switch circuit 270 includes a first port, a second port, and a control port. The first port of the light-emitting switch circuit 270 is grounded, the second port of the light-emitting switch circuit 270 is connected to the CHRG port 220, and the control port of the light-emitting switch circuit 270 is connected to the charge management circuit 240. The control port of the light-emitting switch circuit 270 is used to obtain the light-emitting driving signal output by the charging management circuit 240 when the battery is charged, and the light-emitting switch circuit 270 is turned on when the control port thereof obtains the light-emitting driving signal, so that the second port thereof supplies power to the light-emitting module through the CHRG port 220, and the light-emitting module emits light. Referring to fig. 3, in some embodiments, the light emitting switch circuit 270 may include a MOS transistor Q3; the first terminal of the MOS transistor Q3 is the first port of the light switch circuit 270, the second terminal of the MOS transistor Q3 is the second port of the light switch circuit 270, and the control terminal of the MOS transistor Q3 is the control port of the light switch circuit 270.

The overcharge/overdischarge management circuit 280 includes an input port and an output port. An input port of the overcharge/overdischarge management circuit 280 is used to obtain the battery voltage. The overcharge/overdischarge management circuit 280 compares the battery voltage with a second preset voltage, and when the battery voltage is greater than or equal to the second preset voltage, the overcharge/overdischarge management circuit 280 outputs an overcharge protection signal through an output port thereof. In some embodiments, the second preset voltage may be 4.3V. The overcharge/overdischarge management circuit 280 also compares the battery voltage with a third preset voltage, and when the battery voltage is less than or equal to the third preset voltage, the overcharge/overdischarge management circuit 280 outputs an overdischarge protection signal through an output port thereof. In some embodiments, the third preset voltage may be 2.7V.

The short/over current protection circuit 290 includes an input port and an output port. The input port of the short/over current protection circuit 290 is used to draw battery current. The short circuit/overcurrent protection circuit 290 compares the battery current with a preset current, and when the battery current is greater than or equal to the preset current, the short circuit/overcurrent protection circuit 290 outputs a short circuit/overcurrent protection signal through its output port.

The protection switch circuit 300 includes a first port, a second port, and a control port. The first port of the protection switch circuit 300 is connected to the BAT-port 112, the second port of the protection switch circuit 300 is grounded through the GND port 230, and the control port of the protection switch circuit 300 is connected to the output port of the overcharge/overdischarge management circuit 280 and the output port of the short circuit/overcurrent protection circuit 290. The control port of the protection switch circuit 300 is used to obtain an overcharge protection signal, an overdischarge protection signal, and a short circuit/overcurrent protection signal. The protection switch circuit 300 is turned off when the control port thereof obtains an overcharge protection signal, an overdischarge protection signal or a short circuit/overcurrent protection signal to cut off a battery circuit and prevent the battery from being damaged. Referring to fig. 3, in some embodiments, the protection switch circuit 300 may include a MOS transistor Q4; a first terminal of the MOS transistor Q4 is a first port of the protection switch circuit 300, a second terminal of the MOS transistor Q4 is a second port of the protection switch circuit 300, and a control terminal of the MOS transistor Q4 is a control port of the protection switch circuit 300.

Referring to fig. 4, in some embodiments, an integrated circuit for an electric pumper may be packaged as an integrated circuit chip, wherein the BAT + port 111, BAT-port 112, EN port 120, VOUT port 130, VCC port 200, PROG port 210, CHRG port 220, and GND port 230 of the integrated circuit for the electric pumper may be used as ports of the integrated circuit chip.

The main workflow of an integrated circuit for an electric water pump is explained below.

In one embodiment, the user may output the key triggering signal through the key input module. The first sampling circuit 140 collects the key trigger signal from the EN port 120, and outputs a continuous signal to the duration determining circuit 150 when the key trigger signal is collected. The duration determination circuit 150 compares the duration of the key trigger signal with a predetermined key duration. When the duration of the key trigger signal is greater than or equal to the preset key duration, the duration judging circuit 150 continuously outputs the long-press signal to the first signal output circuit 160 through the first output port thereof until the second input port of the duration judging circuit 150 stops receiving the duration signal output by the first sampling circuit 140; the first signal output circuit 160 outputs a first pumping driving signal to the output switch circuit 190 through an output port thereof in response to the long press signal; when the control port of the output switch circuit 190 obtains the first pumping driving signal, the first port of the output switch circuit obtains the battery voltage from the BAT + port 111 and transmits the battery voltage to the VOUT port 130 through the second port of the output switch circuit, so that the battery voltage is transmitted to the pumping motor through the VOUT port 130 to supply power, and the pumping motor pumps water. When the duration of the key trigger signal is less than the preset key duration, the duration determining circuit 150 outputs a short-press signal to the second signal output circuit 170 through the second output port thereof; the second signal output circuit 170 outputs a second pumping driving signal to the output switch circuit 190 in response to the short press signal; when the control port of the output switch circuit 190 obtains the second pumping driving signal, the first port of the output switch circuit obtains the battery voltage from the BAT + port 111 and transmits the battery voltage to the VOUT port 130 through the second port of the output switch circuit, so that the battery voltage is transmitted to the pumping motor through the VOUT port 130 to supply power for the preset working time, and the pumping motor pumps water for the preset working time. The second sampling circuit 180 samples the second pumping driving signal output by the second signal output circuit 170, and outputs a sampling signal to the second signal output circuit 170; the second signal output circuit 170 stops outputting the second pumping driving signal when the sampling signal is obtained. When the second signal output circuit 170 receives the short press signal again within the preset operating time period, the second signal output circuit 170 outputs a pumping stop signal to the output switch circuit 190 through the output port thereof; when the control port of the output switch circuit 190 receives the pumping stop signal, the first port stops obtaining the battery voltage from the BAT + port 111 to stop supplying power to the pumping motor to stop pumping. It can be seen that, because the embodiment of the utility model can respond to the key trigger signal of long press and the key trigger signal of short press respectively, when the user presses the switch for a long time to make the key input module output the key trigger signal for a duration greater than or equal to the preset key duration, the water pumping motor can be enabled to start pumping water, and the user can be enabled to stop pumping water after releasing the switch; when a user presses the switch for a short time to enable the duration of the key input module to output the key trigger signal to be less than the preset key duration, the water pumping motor can pump water for the preset working duration, and if the switch is pressed for a short time again during the water pumping period of the water pumping motor, the water pumping motor can stop pumping water. Therefore, the integrated circuit in the embodiment of the utility model can be compatible with two working modes of long press and short press, so that the electric water pump can be compatible with switches with and without self-locking, and has universality; in addition, the integrated circuit in the embodiment of the present application can provide a good circuit protection mechanism for the electric water pump.

Referring to fig. 5, in one embodiment, the electric water pump includes an integrated circuit 10, a water pump motor 20, and a key input module 30.

The water pumping motor 20 is used to pump water.

The key input module 30 is used for a user to output a key trigger signal through the key input module.

Referring to fig. 6, in some embodiments, the integrated circuit 10 may include a battery connection port 110, an EN port 120, a VOUT port 130, a first sampling circuit 140, a duration determination circuit 150, a first signal output circuit 160, a second signal output circuit 170, a second sampling circuit 180, and an output switch circuit 190. The individual blocks of the integrated circuit are described in detail below.

The battery connection port 110 includes a BAT + port 111 and a BAT-port 112 for connecting a battery to obtain a battery voltage. The EN port 120 is used for connecting the key input module 30, so that a user can input a key trigger signal through the key input module 30. VOUT port 130 is used to connect to a water pump motor 20.

The first sampling circuit 140 includes an input port and an output port. The input port of the first sampling circuit 140 is connected to the EN port 120, and is configured to collect a key trigger signal output by a user through the key input module 30 from the EN port 120, and output a persistent signal through the output port thereof when the key trigger signal is collected.

The duration judging circuit 150 includes a first input port, a second input port, a first output port, and a second output port. A first input port of the duration judging circuit 150 is connected to the EN port 120, and a second input port of the duration judging circuit 150 is connected to an output port of the first sampling circuit 140. The duration judging circuit 150 is used for comparing the duration of the key trigger signal with a preset key duration; when the duration of the key trigger signal is greater than or equal to the preset key duration, the duration judging circuit 150 continuously outputs the long-time pressing signal through the first output port thereof until the second input port of the duration judging circuit 150 stops receiving the continuous signal output by the first sampling circuit 140; when the duration of the key trigger signal is less than the preset key duration, the duration determining circuit 150 outputs a short-press signal through the second output port thereof. It should be noted that it is well known in the art to compare the duration of the key activation signal with a predetermined key duration and trigger different events when the comparison results are different, and the present application does not improve this.

The first signal output circuit 160 includes an input port and an output port. The input port of the first signal output circuit 160 is connected to the first output port of the duration judging circuit 150, and is configured to output the first pumping driving signal through the output port thereof in response to the long press signal.

The second signal output circuit 170 includes an input port and an output port. An input port of the second signal output circuit 170 is connected to a second output port of the duration judging circuit 150. The second signal output circuit 170 is configured to output a second pumping driving signal through an output port thereof in response to the short press signal, the second pumping driving signal is configured to enable a pumping motor 20 to pump water for a preset working time period, and when the second signal output circuit 170 receives the short press signal again within the preset working time period, the second signal output circuit 170 outputs a pumping stop signal through the output port thereof. In some embodiments, the preset working time period may be 30-60 seconds.

The output switch circuit 190 includes a first port, a second port, and a control port. A first port of the output switch circuit 190 is connected to the BAT + port 111, a second port of the output switch circuit 190 is connected to the VOUT port 130, and a control port of the output switch circuit 190 is connected to an output port of the first signal output circuit 160 and an output port of the second signal output circuit 170. The control port of the output switch circuit 190 is configured to obtain the first pumping driving signal and the second pumping driving signal, and when the control port obtains the first pumping driving signal or the second pumping driving signal, the first port obtains the battery voltage from the BAT + port 111 and transmits the battery voltage to the VOUT port 130 through the second port, so that the battery voltage is transmitted to the pumping motor 20 through the VOUT port 130 to supply power, and the pumping motor 20 pumps water. The control port of the output switch circuit 190 is further configured to obtain a pumping stop signal, and when the control port obtains the pumping stop signal, the first port stops obtaining the battery voltage from the BAT + port 111, so as to stop supplying power to the pumping motor 20, and stop pumping the pumping motor 20.

Referring to fig. 7, in some embodiments, the output switch circuit 190 may include a MOS transistor Q1; a first pole of the MOS transistor Q1 is an input port of the output switch circuit 190, a second pole of the MOS transistor Q1 is an output port of the output switch circuit 190, and a control pole of the MOS transistor Q1 is a control port of the output switch circuit 190.

Referring to fig. 7, in some embodiments, the integrated circuit 10 may further include a VCC port 200, a PROG port 210, a CHRG port 220, a GND port 230, a charge management circuit 240, a charge switch circuit 250, a comparison circuit 260, a light-emitting switch circuit 270, an overcharge/overdischarge management circuit 280, a short-circuit/overcurrent protection circuit 290, and a protection switch circuit 300; the motorized pump may also include a light module 40, a filtering module 50.

The VCC port 200 is used for connecting a charging power source. In some embodiments, the charging power supply output voltage may be dc 5V. The PROG port 210 is connected to the resistor R2 and is grounded through the resistor R2; the PROG port 210 obtains a comparison voltage signal from the resistor R2; the magnitude of the comparison voltage signal can be adjusted by changing the magnitude of the resistance of the resistor R2. The CHRG port 220 is used to connect to a light module 40. GND port 230 is used for ground.

The charge switch circuit 250 includes a first port, a second port, and a control port. A first port of the charge switch circuit 250 is connected to the VCC port 200, a second port of the charge switch circuit 250 is connected to the BAT + port 111, and a control port of the charge switch circuit 250 is connected to an output port of the charge management circuit 240. The control port of the charging switch circuit 250 is configured to obtain the charging driving signal, and when the control port obtains the charging driving signal, the first port obtains the voltage of the charging power supply from the VCC port 200 and transmits the voltage to the BAT + port 111 through the second port, so as to transmit the voltage of the charging power supply to the battery through the BAT + port 111 for charging. The control port of the charging switch circuit 250 is further configured to obtain a charging stop signal, and when the control port obtains the charging stop signal, the first port stops obtaining the voltage of the charging power from the VCC port 200 and transmitting the voltage to the BAT + port 111, so that the battery stops charging. Referring to fig. 7, in some embodiments, the charge switch circuit 250 may include a MOS transistor Q2; the first terminal of the MOS transistor Q2 is the first port of the charging switch circuit 250, the second terminal of the MOS transistor Q2 is the second port of the charging switch circuit 250, and the control terminal of the MOS transistor Q2 is the control port of the charging switch circuit 250.

The comparison circuit 260 includes an input port and an output port. The input port of the comparison circuit 260 is connected to the PROG port 210, and the output port of the comparison circuit 260 is connected to the charge management circuit 240. The input port of the comparator circuit 260 is used to obtain the comparison voltage signal and a reference voltage signal. The comparison circuit 260 compares the comparison voltage signal with the reference voltage signal to obtain a comparison result, and outputs a level signal to the charge management circuit 240 through an output port thereof according to the comparison result. When the level signal output by the comparing circuit 260 is at a high level, the charging managing circuit 240 sets the charging current to a first charging current; when the level signal output by the comparing circuit 260 is low, the charging managing circuit 240 sets the charging current to the second charging current. Referring to fig. 7, in some embodiments, the comparison circuit 260 includes a comparator B1, a resistor R1, and a current source I1. The input port of the comparator B1 is the input port of the comparison circuit 260, and the input port of the comparator B1 is further connected with one end of a current source I1 and a resistor R1; the other end of the resistor R1 is grounded; the output port of comparator B1 is the output port of comparison circuit 260.

The light emitting module 40 is used to emit light when the battery is charged. The light module 40 includes a light emitting diode LED1 and a resistor R3. The cathode of the LED1 is connected to the CHRG port 220, and the anode of the LED1 is connected to the charging power source through a resistor R3.

The illumination switch circuit 270 includes a first port, a second port, and a control port. The first port of the light-emitting switch circuit 270 is grounded, the second port of the light-emitting switch circuit 270 is connected to the CHRG port 220, and the control port of the light-emitting switch circuit 270 is connected to the charge management circuit 240. The control port of the light-emitting switch circuit 270 is used to obtain the light-emitting driving signal output by the charging management circuit 240 when the battery is charged, and the light-emitting switch circuit 270 is turned on when the control port thereof obtains the light-emitting driving signal, so that the second port thereof supplies power to the light-emitting module 40 through the CHRG port 220, and the light-emitting module 40 emits light. Referring to fig. 7, in some embodiments, the light emitting switch circuit 270 may include a MOS transistor Q3; the first terminal of the MOS transistor Q3 is the first port of the light switch circuit 270, the second terminal of the MOS transistor Q3 is the second port of the light switch circuit 270, and the control terminal of the MOS transistor Q3 is the control port of the light switch circuit 270.

The protection switch circuit 300 includes a first port, a second port, and a control port. The first port of the protection switch circuit 300 is connected to the BAT-port 112, the second port of the protection switch circuit 300 is grounded through the GND port 230, and the control port of the protection switch circuit 300 is connected to the output port of the overcharge/overdischarge management circuit 280 and the output port of the short circuit/overcurrent protection circuit 290. The control port of the protection switch circuit 300 is used to obtain an overcharge protection signal, an overdischarge protection signal, and a short circuit/overcurrent protection signal. The protection switch circuit 300 is turned off when the control port thereof obtains an overcharge protection signal, an overdischarge protection signal or a short circuit/overcurrent protection signal to cut off a battery circuit and prevent the battery from being damaged. Referring to fig. 7, in some embodiments, the protection switch circuit 300 may include a MOS transistor Q4; a first terminal of the MOS transistor Q4 is a first port of the protection switch circuit 300, a second terminal of the MOS transistor Q4 is a second port of the protection switch circuit 300, and a control terminal of the MOS transistor Q4 is a control port of the protection switch circuit 300.

The filtering module 50 may include a capacitor C1 for filtering.

Referring to fig. 8, in some embodiments, an integrated circuit for an electric pumper may be packaged as an integrated circuit chip, wherein the BAT + port 111, BAT-port 112, EN port 120, VOUT port 130, VCC port 200, PROG port 210, CHRG port 220, and GND port 230 of the integrated circuit for the electric pumper may be ports of the integrated circuit chip.

In one embodiment, the user may output the key trigger signal through the key input module 30. The first sampling circuit 140 collects the key trigger signal from the EN port 120, and outputs a continuous signal to the duration determining circuit 150 when the key trigger signal is collected. The duration determination circuit 150 compares the duration of the key trigger signal with a predetermined key duration. When the duration of the key trigger signal is greater than or equal to the preset key duration, the duration judging circuit 150 continuously outputs the long-press signal to the first signal output circuit 160 through the first output port thereof until the second input port of the duration judging circuit 150 stops receiving the duration signal output by the first sampling circuit 140; the first signal output circuit 160 outputs a first pumping driving signal to the output switch circuit 190 through an output port thereof in response to the long press signal; when the control port of the output switch circuit 190 obtains the first pumping driving signal, the first port thereof obtains the battery voltage from the BAT + port 111 and transmits the battery voltage to the VOUT port 130 through the second port thereof, so as to transmit the battery voltage to the pumping motor 20 through the VOUT port 130 for supplying power, so that the pumping motor 20 pumps water. When the duration of the key trigger signal is less than the preset key duration, the duration determining circuit 150 outputs a short-press signal to the second signal output circuit 170 through the second output port thereof; the second signal output circuit 170 outputs a second pumping driving signal to the output switch circuit 190 in response to the short press signal; when the control port of the output switch circuit 190 obtains the second pumping driving signal, the first port of the output switch circuit obtains the battery voltage from the BAT + port 111 and transmits the battery voltage to the VOUT port 130 through the second port of the output switch circuit, so that the battery voltage is transmitted to the pumping motor 20 through the VOUT port 130 to supply power for the preset working time, and the pumping motor 20 pumps water for the preset working time. The second sampling circuit 180 samples the second pumping driving signal output by the second signal output circuit 170, and outputs a sampling signal to the second signal output circuit 170; the second signal output circuit 170 stops outputting the second pumping driving signal when the sampling signal is obtained. When the second signal output circuit 170 receives the short press signal again within the preset operating time period, the second signal output circuit 170 outputs a pumping stop signal to the output switch circuit 190 through the output port thereof; when the control port of the output switch circuit 190 receives the pumping stop signal, the first port stops obtaining the battery voltage from the BAT + port 111 to stop supplying power to the pumping motor 20, so that the pumping motor 20 stops pumping water. It can be seen that, because the embodiment of the present invention can respond to the key trigger signal of long press and the key trigger signal of short press respectively, when the user presses the switch for a long time to make the key input module 30 output the key trigger signal for a duration longer than or equal to the preset key duration, the water pumping motor 20 can start pumping water, and the user can stop pumping water from the water pumping motor 20 after releasing the switch; when the user presses the switch for a short time to make the duration of the key trigger signal output by the key input module 30 less than the preset key duration, the water pumping motor 20 may pump water for the preset working duration, and if the switch is pressed for a short time again during the water pumping of the water pumping motor 20, the water pumping motor 20 may stop pumping water. Therefore, the embodiment of the utility model can be compatible with two working modes of long press and short press, so that the electric water pump can be compatible with switches with self-locking and without self-locking, and has universality; in addition, the integrated circuit in the embodiment of the present application can provide a good circuit protection mechanism for the electric water pump.

It is right to have used specific individual example above the utility model discloses expound, only be used for helping to understand the utility model discloses, not be used for the restriction the utility model discloses. To the technical field of the utility model technical personnel, the foundation the utility model discloses an idea can also be made a plurality of simple deductions, warp or replacement.

Claims

1. An integrated circuit for an electric water pump is characterized by comprising a battery connecting port, an EN port, a VOUT port, a first sampling circuit, a duration judging circuit, a first signal output circuit, a second sampling circuit and an output switch circuit;

the VOUT port is used for connecting a water pumping motor;

the second signal output circuit comprises an input port and an output port; the input port of the second signal output circuit is connected with the second output port of the duration judging circuit; the second signal output circuit is used for responding to the short press signal and outputting a second pumping driving signal through an output port of the second signal output circuit, the second pumping driving signal is used for enabling the pumping motor to pump water within a preset working time, and when the second signal output circuit receives the short press signal again within the preset working time, the second signal output circuit outputs a pumping stop signal through the output port of the second signal output circuit;

2. The integrated circuit of claim 1, wherein the output switching circuit comprises a MOS transistor Q1; the first pole of the MOS transistor Q1 is the first port of the output switch circuit, the second pole of the MOS transistor Q1 is the second port of the output switch circuit, and the control pole of the MOS transistor Q1 is the control port of the output switch circuit.

3. The integrated circuit of claim 1, further comprising:

the VCC port is used for connecting a charging power supply;

4. The integrated circuit of claim 3, further comprising:

the PROG port is used for being connected with a resistor R2 and is grounded through the resistor R2; the PROG port acquires a comparison voltage signal from the resistor R2; the magnitude of the comparison voltage signal can be adjusted by changing the resistance value of the resistor R2;

5. The integrated circuit of claim 3, wherein the charge switch circuit comprises a MOS transistor Q2; the first pole of the MOS transistor Q2 is the first port of the charging switch circuit, the second pole of the MOS transistor Q2 is the second port of the charging switch circuit, and the control pole of the MOS transistor Q2 is the control port of the charging switch circuit.

6. The integrated circuit of claim 4, further comprising:

the CHRG port is used for connecting a light-emitting module;

7. The integrated circuit of claim 1, further comprising:

a GND port for grounding;

8. The integrated circuit of claim 7, wherein the protection switch circuit comprises a MOS transistor Q4; the first pole of the MOS transistor Q4 is the first port of the protection switch circuit, the second pole of the MOS transistor Q4 is the second port of the protection switch circuit, and the control pole of the MOS transistor Q4 is the control port of the protection switch circuit.

9. An electric water drawer comprising a water drawing motor for drawing water, a key input module for outputting a key trigger signal, and an integrated circuit according to any one of claims 1 to 8.

10. The motorized water pump of claim 9, further comprising: