36V electronic bathroom and water heater water pump driving circuit

Abstract

The utility model discloses a 36V electronic bathroom and water heater water pump drive circuit, which comprises a power supply filter circuit, a main control circuit, a feedback circuit, a speed regulation circuit and an inverter circuit, the main control circuit is connected with the power supply filter circuit, the feedback circuit, the speed regulation circuit and the inverter circuit. The main control circuit is powered on, enters a standby state, receives an SP instruction of the speed regulation circuit, outputs an inversion signal to control the inversion circuit, outputs three-phase power supply of the motor, operates the motor, monitors the state in real time, outputs a corresponding signal and feeds back the signal to a client through an FG signal of the feedback circuit. The water pump driving circuit integrates the built-in power supply filter circuit, the master control circuit, the feedback circuit, the speed regulation circuit and the inverter circuit, and can work by independently configuring a power supply and communication interface. The integrated circuit is high in integration level, simple in circuit design, small in size and convenient for reserved heat dissipation design of a PCB (Printed Circuit Board).

Description

TECHNICAL FIELD

[0001] The utility model relates to domestic appliance technical field, concretely relates to a 36V electronic bathroom and water heater water pump drive circuit. BACKGROUND

[0002] With the development of industry and the improvement of people's life, electronic bathroom and water heater are more common life electric appliances.

[0003] At present, traditional bathroom products are gradually transiting to electronic bathroom products, and electronic bathroom products (such as intelligent toilet, intelligent bathtub, etc.) are becoming more and more popular.

[0004] Water heater is a common household appliance in people's daily life, and in the use process, the water in the water pipe enters the water heater and is heated, and then the hot water is output from the water outlet.

[0005] Electronic bathroom and water heater use water pump, and the water pump is a machine for conveying liquid or increasing the pressure of liquid. It transmits mechanical energy or other external energy of prime mover to liquid, so that the liquid energy is increased, mainly used for conveying liquid including water, oil, acid and alkali liquid, emulsion, suspension emulsion and liquid metal, etc. It can also convey liquid, gas mixture and liquid containing suspended solid.

[0006] In the prior art, the electronic bathroom and water heater water pump drive circuit is mainly designed in a split type, for example: the power supply module LDO, chip, operational amplifier, pre-drive partition independent design. This split type design has many components, which is not conducive to board layout and PCB heat dissipation, and has high failure rate. INVENTION CONTENTS

[0007] Therefore, in order to solve the above problems in the prior art, the utility model provides a 36V electronic bathroom and water heater water pump drive circuit, which has high integration, is convenient for PCB heat dissipation, and has low failure rate.

[0008] The utility model solves the above problems through the following technical means:

[0009] A 36V electronic bathroom and water heater water pump drive circuit, comprising a power filter circuit, a main control circuit, a feedback circuit, a speed regulation circuit and an inverter circuit, wherein the main control circuit is connected with the power filter circuit, the feedback circuit, the speed regulation circuit and the inverter circuit respectively.

[0010] Preferably, the power filter circuit comprises a power supply interface VIN, a ground interface GND and a capacitor C2, the power supply interface VIN is connected with one end of the capacitor C2, and the other end of the capacitor C2 is connected with the ground interface GND.

[0011] As preferred, the main control circuit comprises a chip U1 and a diode D2 which is formed by two diodes in forward parallel connection, the pin 37 of the chip U1 is connected to the negative pole of the diode D2 and one end of the coil L1 respectively, the other end of the coil L1 is connected to one end of the resistor R11, one end of the capacitor C10, one end of the resistor R14 and one end of the resistor R15 respectively, the other end of the resistor R11 is connected to one end of the resistor R12, one end of the capacitor C8 and the pin 43 of the chip U1 respectively, the other end of the resistor R12 is connected to the other end of the capacitor C8, the other end of the capacitor C10, the positive pole of the diode D2, the pin 49 of the chip U1, the pin 42 of the chip U1, the pin 40 of the chip U1, the pin 32 of the chip U1, the pin 5 of the terminal J1, the pin 17 of the chip U1 and the other end of the capacitor C2 respectively, the other end of the resistor R14 is connected to one end of the capacitor C11 and the pin 41 of the chip U1 respectively, the other end of the capacitor C11 is connected to the pin 49 of the chip U1, the other end of the resistor R15 is connected to one end of the capacitor C12 and the pin 44 of the chip U1 respectively, the other end of the capacitor C12 is connected to the pin 5 of the chip U1, one end of the capacitor C4, the pin 7 of the chip U1, one end of the capacitor C5 and the pin 49 of the chip U1 respectively, the other end of the capacitor C4 is connected to the pin 6 of the chip U1, the other end of the capacitor C5 is connected to the pin 8 of the chip U1, the pin 2 of the chip U1 is connected to the pin 1 of the terminal J1 and one end of the capacitor C6 respectively, the other end of the capacitor C6 is connected to the pin 49 of the chip U1, the pin 3 of the chip U1 is connected to the pin 2 of the terminal J1, the pin 4 of the chip U1 is connected to the pin 4 of the terminal J1, the pin 8 of the chip U1 is connected to the pin 3 of the terminal J1, the pin 39 of the chip U1 is connected to one end of the capacitor C13, one end of the capacitor C15, one end of the resistor R9 and one end of the capacitor C2 respectively, the other end of the capacitor C13 is connected to the other end of the capacitor C15 and the pin 49 of the chip U1 respectively, the other end of the resistor R9 is connected to the pin 12 of the chip U1, one end of the resistor R10 and one end of the capacitor C7 respectively, the other end of the resistor R10 is connected to the other end of the capacitor C7, the pin 15 of the chip U1 and the pin 5 of the chip U1 respectively, the pin 36 of the chip U1 is connected to one end of the capacitor C17, the other end of the capacitor C17 is connected to the pin 34 of the chip U1, the pin 29 of the chip U1 is connected to one end of the capacitor C16, the other end of the capacitor C16 is connected to the pin 27 of the chip U1, the pin 22 of the chip U1 is connected to one end of the capacitor C14, the other end of the capacitor C14 is connected to the pin 24 of the chip U1, the pin 16 of the chip U1 is connected to one end of the resistor R13 and one end of the capacitor C9 respectively, the other end of the capacitor C9 is connected to the pin 5 of the chip U1.

[0012] As preferably, the feedback circuit comprises a transistor Q1, the emitter of the transistor Q1 is connected to pin 49 of the chip U1, the base of the transistor Q1 is connected to one end of the resistor R7, the other end of the resistor R7 is connected to pin 1 of the chip U1, the collector of the transistor Q1 is connected to one end of the resistor R2 and one end of the resistor R6 respectively, the other end of the resistor R6 is connected to pin 8 of the chip U1, the other end of the resistor R2 is connected to the terminal FG.

[0013] As preferably, the speed regulating circuit comprises a transistor Q2, the collector of the transistor Q2 is connected to pin 48 of the chip U1, one end of the capacitor C3 and one end of the resistor R8 respectively, the other end of the resistor R8 is connected to pin 8 of the chip U1 and one end of the resistor R4 respectively, the other end of the resistor R4 is connected to one end of the resistor R1 and the terminal SP respectively, the other end of the resistor R1 is connected to one end of the resistor R5, one end of the resistor R3, one end of the capacitor C1, the negative pole of the stabilizing diode D1 and the base of the transistor Q2 respectively, the other end of the resistor R5 is connected to pin 11 of the chip U1, the other end of the resistor R3 is connected to the other end of the capacitor C1, the positive pole of the stabilizing diode D1, the emitter of the transistor Q2, the other end of the capacitor C3 and pin 49 of the chip U1 respectively.

[0014] As preferably, the inverter circuit comprises a half bridge U2, a half bridge U3 and a half bridge U4, pin 1 of the half bridge U2 is connected to pin 22 of the chip U1, pin 2 of the half bridge U2 is connected to one end of the resistor R20, the other end of the resistor R20 is connected to pin 23 of the chip U1, pin 3 of the half bridge U2 is connected to pin 3 of the half bridge U3, pin 3 of the half bridge U4, pin 18 of the chip U1, the other end of the resistor R13 and one end of the resistor R22 respectively, the other end of the resistor R22 is connected to pin 17 of the chip U1, pin 5 of the half bridge U2 is connected to pin 6 of the half bridge U2, pin 22 of the chip U1 and the terminal WW respectively, pin 7 of the half bridge U2 is connected to pin 8 of the half bridge U2, pin 7 of the half bridge U3, pin 8 of the half bridge U3, pin 7 of the half bridge U4, pin 8 of the half bridge U4 and pin 39 of the chip U1 respectively, pin 1 of the half bridge U3 is connected to pin 27 of the chip U1, pin 2 of the half bridge U3 is connected to one end of the resistor R18, the other end of the resistor R18 is connected to pin 28 of the chip U1, pin 4 of the half bridge U3 is connected to one end of the resistor R19, the other end of the resistor R19 is connected to pin 25 of the chip U1, pin 5 of the half bridge U3 is connected to pin 6 of the half bridge U3, pin 27 of the chip U1 and the terminal VV respectively, pin 1 of the half bridge U4 is connected to pin 34 of the chip U1, pin 2 of the half bridge U4 is connected to one end of the resistor R16, the other end of the resistor R16 is connected to pin 35 of the chip U1, pin 4 of the half bridge U4 is connected to one end of the resistor R17, the other end of the resistor R17 is connected to pin 31 of the chip U1, pin 5 of the half bridge U4 is connected to pin 6 of the half bridge U4, pin 34 of the chip U1 and the terminal UU respectively.

[0015] As preferably, the model of the chip U1 is RT7083.

[0016] As preferably, the model of the half-bridge U2, the half-bridge U3 and the half-bridge U4 is same.

[0017] As preferably, the model of the half-bridge U2, the half-bridge U3 and the half-bridge U4 is same.

[0018] Compared with the prior art, the utility model has at least the following beneficial effects:

[0019] The utility model discloses a water pump drive circuit integrates built-in power filter circuit, main control circuit, feedback circuit, speed regulation circuit and inverter circuit, and can work by independently configuring power supply and communication interface.

[0020] The utility model discloses high integration, and circuit design is simple, and the volume is small, and the convenience PCB is reserved heat dissipation design. ACCURACY OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the following will be needed to use the drawing in the embodiment description briefly introduces, obviously, the drawing in the following description only some embodiments of the utility model, for those skilled in the art, under the premise of not paying creative labor, can also obtain other drawings according to these drawings.

[0022] Figure 1 It is the principle drawing of 36V electronic bathroom and water heater water pump drive circuit of the utility model;

[0023] Figure 2 It is the principle drawing of power filter circuit of the utility model;

[0024] Figure 3 It is the principle drawing of main control circuit of the utility model;

[0025] Figure 4 It is the principle drawing of feedback circuit of the utility model;

[0026] Figure 5 It is the principle drawing of speed regulation circuit of the utility model;

[0027] Figure 6 It is the principle drawing of inverter circuit of the utility model. DETAILED DESCRIPTION

[0028] For the above purposes, features and advantages of the present application to be more apparent and easy to understand, the technical solutions of the present application will be described in detail below in conjunction with the drawings and specific examples. It should be pointed out that the described examples are only a part of the examples of the present application, not all examples, and all other examples obtained by those skilled in the art without creative labor based on the examples in the present application belong to the scope of protection of the present application.

[0029] As shown in Figure 1 The utility model provides a 36V electronic bathroom and water heater water pump drive circuit, including power filter circuit, main control circuit, feedback circuit, speed regulation circuit and inverter circuit, main control circuit connects power filter circuit, feedback circuit, speed regulation circuit and inverter circuit respectively.

[0030] As shown in Figure 2 The power filter circuit includes a power supply interface VIN, a ground interface GND, and a capacitor C2. The power supply interface VIN is connected to one end of the capacitor C2, and the other end of the capacitor C2 is connected to the ground interface GND.

[0031] As shown in Figure 3As shown, the main control circuit includes chip U1 and diode D2, the model of chip U1 is RT7083, diode D2 is formed by two diodes in forward parallel, the pin 37 of chip U1 is connected with the negative pole of diode D2 and one end of coil L1 respectively, the other end of coil L1 is connected with one end of resistor R11, one end of capacitor C10, one end of resistor R14 and one end of resistor R15 respectively, the other end of resistor R11 is connected with one end of resistor R12, one end of capacitor C8 and the pin 43 of chip U1 respectively, the other end of resistor R12 is connected with the other end of capacitor C8, the other end of capacitor C10, the positive pole of diode D2, the pin 49 of chip U1, the pin 42 of chip U1, the pin 40 of chip U1, the pin 32 of chip U1, the pin 5 of terminal J1, the pin 17 of chip U1 and the other end of capacitor C2 respectively, the other end of resistor R14 is connected with one end of capacitor C11 and the pin 41 of chip U1 respectively, the other end of capacitor C11 is connected with the pin 49 of chip U1, the other end of resistor R15 is connected with one end of capacitor C12 and the pin 44 of chip U1 respectively, the other end of capacitor C12 is connected with the pin 5 of chip U1, one end of capacitor C4, the pin 7 of chip U1, one end of capacitor C5 and the pin 49 of chip U1 respectively, the other end of capacitor C4 is connected with the pin 6 of chip U1, the other end of capacitor C5 is connected with the pin 8 of chip U1, the pin 2 of chip U1 is connected with one end of capacitor C6 and the pin 1 of terminal J1 respectively, the other end of capacitor C6 is connected with the pin 49 of chip U1, the pin 3 of chip U1 is connected with the pin 2 of terminal J1, the pin 4 of chip U1 is connected with the pin 4 of terminal J1, the pin 8 of chip U1 is connected with the pin 3 of terminal J1, the pin 39 of chip U1 is connected with one end of capacitor C13, one end of capacitor C15, one end of resistor R9 and one end of capacitor C2 respectively, the other end of capacitor C13 is connected with the other end of capacitor C15 and the pin 49 of chip U1 respectively, the other end of resistor R9 is connected with the pin 12 of chip U1, one end of resistor R10 and one end of capacitor C7 respectively, the other end of resistor R10 is connected with the other end of capacitor C7, the pin 15 of chip U1 and the pin 5 of chip U1 respectively, the pin 36 of chip U1 is connected with one end of capacitor C17, the other end of capacitor C17 is connected with the pin 34 of chip U1, the pin 29 of chip U1 is connected with one end of capacitor C16, the other end of capacitor C16 is connected with the pin 27 of chip U1, the pin 22 of chip U1 is connected with one end of capacitor C14, the other end of capacitor C14 is connected with the pin 24 of chip U1, the pin 16 of chip U1 is connected with one end of resistor R13 and one end of capacitor C9 respectively, the other end of capacitor C9 is connected with the pin 5 of chip U1.

[0032] As Figure 4As shown, the feedback circuit includes a transistor Q1. The emitter of transistor Q1 is connected to pin 49 of chip U1. The base of transistor Q1 is connected to one end of resistor R7. The other end of resistor R7 is connected to pin 1 of chip U1. The collector of transistor Q1 is connected to one end of resistor R2 and one end of resistor R6. The other end of resistor R6 is connected to pin 8 of chip U1. The other end of resistor R2 is connected to terminal FG.

[0033] like Figure 5 As shown, the speed control circuit includes a transistor Q2. The collector of transistor Q2 is connected to pin 48 of chip U1, one end of capacitor C3, and one end of resistor R8. The other end of resistor R8 is connected to pin 8 of chip U1 and one end of resistor R4. The other end of resistor R4 is connected to one end of resistor R1 and terminal SP. The other end of resistor R1 is connected to one end of resistor R5, one end of resistor R3, one end of capacitor C1, the cathode of Zener diode D1, and the base of transistor Q2. The other end of resistor R5 is connected to pin 11 of chip U1. The other end of resistor R3 is connected to the other end of capacitor C1, the anode of Zener diode D1, the emitter of transistor Q2, the other end of capacitor C3, and pin 49 of chip U1.

[0034] like Figure 6 As shown, the inverter circuit includes half-bridge U2, half-bridge U3, and half-bridge U4; half-bridge U2, half-bridge U3, and half-bridge U4 are all of the same model, JMTP170N06D; pin 1 of half-bridge U2 is connected to pin 22 of chip U1; pin 2 of half-bridge U2 is connected to one end of resistor R20, and the other end of resistor R20 is connected to pin 23 of chip U1; pin 3 of half-bridge U2 is connected to pin 3 of half-bridge U3, pin 3 of half-bridge U4, pin 18 of chip U1, the other end of resistor R13, and one end of resistor R22; the other end of resistor R22 is connected to pin 17 of chip U1; pin 5 of half-bridge U2 is connected to pin 6 of half-bridge U2, pin 22 of chip U1, and terminal WW; pin 7 of half-bridge U2 is connected to pin 8 of half-bridge U2, pin 7 of half-bridge U3, pin 8 of half-bridge U3, pin 7 of half-bridge U4, and pin 6 of half-bridge U2. Pin 8 of U4 is connected to pin 39 of chip U1. Pin 1 of half-bridge U3 is connected to pin 27 of chip U1. Pin 2 of half-bridge U3 is connected to one end of resistor R18, and the other end of resistor R18 is connected to pin 28 of chip U1. Pin 4 of half-bridge U3 is connected to one end of resistor R19, and the other end of resistor R19 is connected to pin 25 of chip U1. Pin 5 of half-bridge U3 is connected to pin 6 of half-bridge U3, pin 27 of chip U1, and terminal VV. Pin 1 of half-bridge U4 is connected to pin 34 of chip U1. Pin 2 of half-bridge U4 is connected to one end of resistor R16, and the other end of resistor R16 is connected to pin 35 of chip U1. Pin 4 of half-bridge U4 is connected to one end of resistor R17, and the other end of resistor R17 is connected to pin 31 of chip U1. Pin 5 of half-bridge U4 is connected to pin 6 of half-bridge U4, pin 34 of chip U1, and terminal UU.

[0035] The working process of the water pump driving circuit is as follows: power on, the main control circuit enters standby state, receives the SP instruction of the speed regulation circuit, the main control circuit outputs the inverter signal to control the inverter circuit, the inverter circuit outputs three-phase power supply for the motor, the motor runs, the main control circuit performs real-time monitoring and outputs corresponding signals to the customer through the FG signal feedback of the feedback circuit.

[0036] The water pump driving circuit of the utility model integrates the built-in power filter circuit, the main control circuit, the feedback circuit, the speed regulation circuit and the inverter circuit, and can work independently by configuring the power supply and communication interface.

[0037] The utility model has high integration, simple circuit design, small size and convenient PCB reserved heat dissipation design.

[0038] The above-mentioned embodiments only express several implementation manners of the utility model, and the description is more specific and detailed, but it cannot be understood as the limitation of the utility model patent scope. It should be pointed out that, for ordinary skilled person in the art, without departing from the concept of the utility model, a plurality of modifications and improvements can be made, which belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A 36V electronic bathroom and water heater pump driving circuit, characterized in that, The power filter circuit, the main control circuit, the feedback circuit, the speed regulation circuit and the inverter circuit are connected respectively.

2. The 36V electronic bathroom and water heater pump driving circuit according to claim 1, characterized in that, The power filter circuit includes a power supply interface VIN, a ground interface GND and a capacitor C2, the power supply interface VIN is connected to one end of the capacitor C2, and the other end of the capacitor C2 is connected to the ground interface GND.

3. The 36V electronic bathroom and water heater pump driving circuit according to claim 2, characterized in that, The main control circuit includes a chip U1 and a diode D2, the diode D2 is formed by two diodes in forward parallel connection, the foot 37 of the chip U1 is connected to the negative electrode of the diode D2 and one end of a coil L1 respectively, the other end of the coil L1 is connected to one end of a resistor R11, one end of a capacitor C10, one end of a resistor R14 and one end of a resistor R15 respectively, the other end of the resistor R11 is connected to one end of a resistor R12, one end of a capacitor C8 and the foot 43 of the chip U1 respectively, the other end of the resistor R12 is connected to the other end of the capacitor C8, the other end of the capacitor C10, the positive electrode of the diode D2, the foot 49 of the chip U1, the foot 42 of the chip U1, the foot 40 of the chip U1, the foot 32 of the chip U1, the foot 5 of a terminal J1, the foot 17 of the chip U1 and the other end of the capacitor C2 respectively, the other end of the resistor R14 is connected to one end of a capacitor C11 and the foot 41 of the chip U1 respectively, the other end of the capacitor C11 is connected to the foot 49 of the chip U1, the other end of the resistor R15 is connected to one end of a capacitor C12 and the foot 44 of the chip U1 respectively, the other end of the capacitor C12 is connected to the foot 5 of the chip U1, one end of a capacitor C4, the foot 7 of the chip U1, one end of a capacitor C5 and the foot 49 of the chip U1 respectively, the other end of the capacitor C4 is connected to the foot 6 of the chip U1, the other end of the capacitor C5 is connected to the foot 8 of the chip U1, the foot 2 of the chip U1 is connected to the foot 1 of the terminal J1 and one end of a capacitor C6 respectively, the other end of the capacitor C6 is connected to the foot 49 of the chip U1, the foot 3 of the chip U1 is connected to the foot 2 of the terminal J1, the foot 4 of the chip U1 is connected to the foot 4 of the terminal J1, the foot 8 of the chip U1 is connected to the foot 3 of the terminal J1, the foot 39 of the chip U1 is connected to one end of a capacitor C13, one end of a capacitor C15, one end of a resistor R9 and one end of the capacitor C2 respectively, the other end of the capacitor C13 is connected to the other end of the capacitor C15 and the foot 49 of the chip U1 respectively, the other end of the resistor R9 is connected to the foot 12 of the chip U1, one end of a resistor R10 and one end of a capacitor C7 respectively, the other end of the resistor R10 is connected to the other end of the capacitor C7, the foot 15 of the chip U1 and the foot 5 of the chip U1 respectively, the foot 36 of the chip U1 is connected to one end of a capacitor C17, the other end of the capacitor C17 is connected to the foot 34 of the chip U1, the foot 29 of the chip U1 is connected to one end of a capacitor C16, the other end of the capacitor C16 is connected to the foot 27 of the chip U1, the foot 22 of the chip U1 is connected to one end of a capacitor C14, the other end of the capacitor C14 is connected to the foot 24 of the chip U1, the foot 16 of the chip U1 is connected to one end of a resistor R13 and one end of a capacitor C9 respectively, the other end of the capacitor C9 is connected to the foot 5 of the chip U1.

4. The 36V electronic bathroom and water heater pump driving circuit according to claim 3, characterized in that, The feedback circuit comprises a transistor Q1, the emitter of the transistor Q1 is connected to the pin 49 of the chip U1, the base of the transistor Q1 is connected to one end of the resistor R7, the other end of the resistor R7 is connected to the pin 1 of the chip U1, the collector of the transistor Q1 is connected to one end of the resistor R2 and one end of the resistor R6 respectively, the other end of the resistor R6 is connected to the pin 8 of the chip U1, the other end of the resistor R2 is connected to the terminal FG.

5. The 36V electronic bathroom and water heater pump driving circuit according to claim 3, characterized in that, The speed regulating circuit comprises a transistor Q2, the collector of the transistor Q2 is connected to the pin 48 of the chip U1, one end of the capacitor C3 and one end of the resistor R8 respectively, the other end of the resistor R8 is connected to the pin 8 of the chip U1 and one end of the resistor R4 respectively, the other end of the resistor R4 is connected to one end of the resistor R1 and the terminal SP respectively, the other end of the resistor R1 is connected to one end of the resistor R5, one end of the resistor R3, one end of the capacitor C1, the negative electrode of the stabilizing diode D1 and the base of the transistor Q2 respectively, the other end of the resistor R5 is connected to the pin 11 of the chip U1, the other end of the resistor R3 is connected to the other end of the capacitor C1, the positive electrode of the stabilizing diode D1, the emitter of the transistor Q2, the other end of the capacitor C3 and the pin 49 of the chip U1 respectively.

6. The 36V electronic bathroom and water heater pump driving circuit according to claim 3, characterized in that, The inverter circuit comprises a half-bridge U2, a half-bridge U3 and a half-bridge U4, the pin 1 of the half-bridge U2 is connected to the pin 22 of the chip U1, the pin 2 of the half-bridge U2 is connected to one end of the resistor R20, the other end of the resistor R20 is connected to the pin 23 of the chip U1, the pin 3 of the half-bridge U2 is connected to the pin 3 of the half-bridge U3, the pin 3 of the half-bridge U4, the pin 18 of the chip U1, the other end of the resistor R13 and one end of the resistor R22 respectively, the other end of the resistor R22 is connected to the pin 17 of the chip U1, the pin 5 of the half-bridge U2 is connected to the pin 6 of the half-bridge U2, the pin 22 of the chip U1 and the terminal WW respectively, the pin 7 of the half-bridge U2 is connected to the pin 6 of the half-bridge U2, the pin 7 of the half-bridge U3, the pin 8 of the half-bridge U3, the pin 7 of the half-bridge U4, the pin 8 of the half-bridge U4 and the pin 39 of the chip U1 respectively, the pin 1 of the half-bridge U3 is connected to the pin 27 of the chip U1, the pin 2 of the half-bridge U3 is connected to one end of the resistor R18, the other end of the resistor R18 is connected to the pin 28 of the chip U1, the pin 4 of the half-bridge U3 is connected to one end of the resistor R19, the other end of the resistor R19 is connected to the pin 25 of the chip U1, the pin 5 of the half-bridge U3 is connected to the pin 6 of the half-bridge U3, the pin 27 of the chip U1 and the terminal VV respectively, the pin 1 of the half-bridge U4 is connected to the pin 34 of the chip U1, the pin 2 of the half-bridge U4 is connected to one end of the resistor R16, the other end of the resistor R16 is connected to the pin 35 of the chip U1, the pin 4 of the half-bridge U4 is connected to one end of the resistor R17, the other end of the resistor R17 is connected to the pin 31 of the chip U1, the pin 5 of the half-bridge U4 is connected to the pin 6 of the half-bridge U4, the pin 34 of the chip U1 and the terminal UU respectively.

7. The 36V electronic bathroom and water heater pump driving circuit according to claim 3, characterized in that, The model of the chip U1 is RT7083.

8. The 36V electronic bathroom and water heater pump driving circuit according to claim 6, characterized in that, The models of the half-bridge U2, the half-bridge U3 and the half-bridge U4 are the same.

9. The 36V electronic bathroom and water heater pump driving circuit according to claim 6, characterized in that, The models of the half-bridge U2, the half-bridge U3 and the half-bridge U4 are all JMTP170N06D.

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