A heating temperature protection circuit and device for air wave rehabilitation system

Abstract

The present invention discloses a heating temperature protection circuit and device for an air wave rehabilitation system, which relates to the field of circuit control technology, including: a power supply part, a control part, and a temperature sampling part, wherein the temperature sampling part is connected to the control part, the control part is connected to the power supply part, the power supply part is used to convert the PWM heating control input sent by the host into the power required by the control part to supply power to it, and the temperature sampling part is used to detect the temperature signal of the current heating plate and transmit it to the control part. When the control part receives the temperature and determines that the temperature is too high, it immediately turns off the heating power supply to stop heating, realizing a simple connection between the host and the air wave pressurizing component with two wires, which does not affect the host to adjust the temperature through PWM; the volume installed on the heating plate is small, the installation is convenient, it does not hurt the human body, and the control accuracy is high; the over-high temperature value can be set by software; the temperature protection function can also be realized when the host is out of control.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit control, and in particular to a heating temperature protection circuit and device for an air wave rehabilitation system. Background Art

[0002] As people's living standards improve, they are more and more concerned about their own health, and air wave products are deeply loved by everyone. Therefore, the requirements for air wave products have also increased, and it is hoped that there will be a heating function in the air wave pressurized component. However, if the heating temperature is too high, it will cause harm to the human body, so a temperature protection circuit is needed. At present, the temperature protection device is mainly protected by a thermostat or the host is controlled by NTC detection. The thermostat solution is large in size and difficult to install in the heating part of the air wave pressurized component. It is easy to hurt the human body when used, the temperature error is large, and there are few temperature gear options. The host is controlled by NTC detection. There are many lines connecting the host and the cuff, and the connection is complicated, which is easy to cause the temperature control protection to fail; the temperature protection will also fail when the host is out of control. In order to overcome these problems, we have invented a temperature protection circuit and device for the air wave rehabilitation system that is simple to connect, easy to install, and does not hurt the human body. Summary of the invention

[0003] In order to solve the above technical problems, a heating temperature protection circuit and device for an air wave rehabilitation system are provided. This technical solution solves the problems raised in the above background technology.

[0004] In order to achieve the above purpose, the technical solution adopted by the present invention is:

[0005] A heating temperature protection circuit for an air wave rehabilitation system, comprising:

[0006] A power supply part, a control part, and a temperature sampling part, wherein the temperature sampling part 30 is connected to the control part, and the control part is connected to the power supply part. The power supply part is used to convert the PWM heating control input sent by the host into the power required by the control part to power it, and the temperature sampling part is used to detect the temperature signal of the current heating plate and transmit it to the control part.

[0007] Preferably, the temperature sampling part includes a first NTC1, a second NTC2, and a third NTC3, and the output signals of one end of these three NTCs are respectively connected to the 3rd, 2nd, and 6th pins of U2 of the control part, and the other pins are connected together to the 5V terminal of the control part.

[0008] Preferably, the control part: precision resistors R6, R7, R8 and capacitors C6, C8, C9 and NTC1, NTC2, NTC3 of the temperature sampling part constitute a temperature sampling circuit, and send the temperature signal to MCU U2, resistors R2, R3, R4, R5, transistor Q2, diode D7, P MOS tube Q1 constitute a heating power output circuit for controlling the power supply, C7 is a power supply filter, and P1 is a program burning port.

[0009] Preferably, pin 1 of the MCU U2 is connected to a 5V power supply, and pin 8 is connected to a PWM input terminal; one pin of C7 is connected to a 5V power supply; the other pin is connected to a PWM input terminal; one pin of R7 and C8 is connected to pin 2 of MCU U2 together, and the other pins are connected to the PWM input terminal together; one pin of R6 and C6 is connected to pin 3 of MCU U2 together, and the other pins are connected to the PWM input terminal together; one pin of R8 and C9 is connected to pin 6 of MCU U2 together, and the other pins are connected to the PWM input terminal together; pin 4 of P1 is connected to a 5V power supply, pin 1 is connected to the PWM input terminal, and pins 2 and 3 are connected to pins 7 and 4 of MCU U2 respectively; pin 5 of MCU is connected to one pin of R4, and the other pin of R4 is connected to the base of Q2 and one pin of R5; the emitter of Q2 and the other pin of R5 are connected to the PWM input terminal; the collector of Q2 is connected to the K terminal of diode D7; the A terminal of diode D7 is connected to one pin of resistor R3; the other pin of resistor R3 is connected to one pin of resistor R2 and the gate of P MOS tube Q1; the other pin of resistor R2 is connected to P The K terminals of the source diode D1 of the MOS tube Q1 are connected together; the drain of the P MOS tube Q1 outputs the power supply to the heating plate.

[0010] Preferably, the power supply part: diodes D2, D3, D4, D5, D6, capacitors C1, C2, C3, C4, C5, EC1, EC2, EC3, EC4, EC5, resistor R1, and voltage regulator U1 constitute a power supply processor, which converts the PWM power supply into a DC 5V to power the control part; the A terminal of the diode D1 is connected to the 12V input terminal; the A terminal of the diode D2 is connected to the 12V input terminal; the K terminal of the diode D2 is connected to the A terminal of the diode D3; the K terminal of the diode D3 is connected to the A terminal of the diode D4; the K terminal of the diode D4 is connected to the A terminal of the diode D5; the K terminal of the diode D5 is connected to the capacitor One foot of C1 is connected to the input end of the positive electrode of the voltage regulator U1 of the electrolytic capacitors CE1, EC2, EC3, EC4, and EC5; the other foot of the capacitor C1 is connected to the resistor R1, and the other foot of R1 is connected to the PWM input end; the ground end of the negative electrode of the voltage regulator U1 of the electrolytic capacitors CE1, EC2, EC3, EC4, and EC5 is connected to the PWM input end; the output end of the voltage regulator U1 is connected to one foot of the capacitors C2 and C3 and the A end of the diode D6; the other foot of the capacitors C2 and C3 is connected to the PWM input end; the K end of the diode D6 is connected to one foot of C4 and C5 and 5V, and the other foot of the capacitors C4 and C5 is connected to the PWM input end.

[0011] A heating temperature protection device for an air wave rehabilitation system comprises the above-mentioned heating temperature protection circuit for the air wave rehabilitation system.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The main MCU is used to control the temperature of three heating sheets through PWM, and the sub-MCU is used to control high temperature protection through NTC. Features: The host is connected to the air wave pressurization component by 2 wires, which is small in size and easy to install, does not hurt the human body, has high control accuracy, and is simple to connect to the air wave pressurization component. Temperature protection can also be achieved when the host is out of control. The temperature protection circuit of the air wave rehabilitation system includes a power supply part, a control part, and a temperature sampling part; the power supply part provides power to the control part, and the temperature sampling part collects the temperature signal to the control part. When the control part receives the temperature and determines that the temperature is too high, it immediately turns off the heating power and stops heating, realizing a simple connection. The host is connected to the air wave pressurization component by 2 wires, which does not affect the host's temperature adjustment through PWM; the size installed on the heating sheet is small, easy to install, does not hurt the human body, and has high control accuracy; the excessive temperature value can be set by software; the temperature protection function can also be achieved when the host is out of control. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the heating temperature protection circuit structure of the air wave rehabilitation system of the present invention. DETAILED DESCRIPTION

[0015] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0016] Reference Figure 1 As shown, a heating temperature protection circuit of an air wave rehabilitation system includes a power supply part 10, a control part 20, and a temperature sampling part 30, wherein the temperature sampling part 30 is connected to the control part 20, and the control part 20 is connected to the power supply part 10. The power supply part 10 is used to convert the PWM heating control input sent by the host into the power required by the control part 20 to power it, and the temperature sampling part 30 is used to detect the temperature signal of the current heating plate and transmit it to the control part 20. When the temperature is too high, the control part 20 turns off the power supply of the heating plate to stop heating.

[0017] In this embodiment, the host outputs a DC12V power supply terminal and a PWM terminal to heat the air wave pressurization component, and controls the heating power of the air wave pressurization component through PWM to achieve temperature regulation. The power supply part 10 is connected to the two ends of the host output, and then performs power processing to power the control part, but the PWM control of the host is not affected. When the host controls the heating power too large or the host loses control, resulting in excessive heating power, causing the temperature to be too high, the sampling part 30 collects the temperature signal and sends the signal to the control part 20. The control part 20 receives the temperature signal and determines that the temperature is too high compared to the set value, and immediately turns off the heating power supply to stop the heating. Therefore, the temperature protection circuit provided by the present invention realizes timely temperature protection through the combination of software and hardware, with simple connection, high flexibility and a wider range of applications.

[0018] In specific implementation, the temperature sampling part 30 includes a first NTC1, a second NTC2, and a third NTC3. The output signals of one end of these three NTCs are respectively connected to the 3rd, 2nd, and 6th pins of U2 of the control part 20, and the other ends are connected to the 5V terminal of the control part 20.

[0019] The control part 20: precision resistors R6, R7, R8 and capacitors C6, C8, C9 and NTC1, NTC2, NTC3 of the temperature sampling part 30 constitute a temperature sampling circuit, and send the temperature signal to MCU U2. Resistors R2, R3, R4, R5, transistor Q2, diode D7, and P MOS tube Q1 constitute a heating power output control circuit. C7 is a power supply filter, and P1 is a program burning port. When the temperature is too high, the MUC output signal turns off the MOS tube Q1 to cut off the heating power supply and stop heating.

[0020] Pin 1 of MCU U2 is connected to 5V power supply, and pin 8 is connected to PWM input terminal; one pin of C7 is connected to 5V power supply; the other pin is connected to PWM input terminal; one pin of R7 and C8 is connected to pin 2 of MCU U2 together, and the other pins are connected to PWM input terminal together; one pin of R6 and C6 is connected to pin 3 of MCU U2 together, and the other pins are connected to PWM input terminal together; one pin of R8 and C9 is connected to pin 6 of MCU U2 together, and the other pins are connected to PWM input terminal together; pin 4 of P1 is connected to 5V power supply, pin 1 is connected to PWM input terminal, and pins 2 and 3 are connected to pins 7 and 4 of MCU U2 respectively; pin 5 of MCU is connected to one pin of R4, and the other pin of R4 is connected to the base of Q2 and one pin of R5; the emitter of Q2 and the other pin of R5 are connected to PWM input terminal; the collector of Q2 is connected to the K terminal of diode D7; the A terminal of diode D7 is connected to one pin of resistor R3; the other pin of resistor R3 is connected to one pin of resistor R2 and the gate of P MOS tube Q1; the other pin of resistor R2 is connected to P The K terminals of the source diode D1 of the MOS tube Q1 are connected together; the drain of the P MOS tube Q1 outputs the power supply to the heating plate.

[0021] The power supply part: diodes D2, D3, D4, D5, D6, capacitors C1, C2, C3, C4, C5, EC1, EC2, EC3, EC4, EC5, resistor R1, and voltage regulator U1 constitute a power supply processor, which adjusts the PWM power supply into a DC 5V to supply power to the control part 20; the A end of the diode D1 is connected to the 12V input end; the A end of the diode D2 is connected to the 12V input end; the K end of the diode D2 is connected to the A end of the diode D3; the K end of the diode D3 is connected to the A end of the diode D4; the K end of the diode D4 is connected to the A end of the diode D5; the K end of the diode D5 is connected to the capacitor C One foot of the electrolytic capacitor CE1, EC2, EC3, EC4, EC5 is connected to the input end of the positive voltage regulator tube U1; the other foot of the capacitor C1 is connected to the resistor R1, and the other foot of R1 is connected to the PWM input end; the ground end of the negative electrode voltage regulator tube U1 of the electrolytic capacitor CE1, EC2, EC3, EC4, EC5 is connected to the PWM input end; the output end of the voltage regulator tube U1 is connected to one foot of the capacitor C2, C3 and the A end of the diode D6; the other foot of the capacitor C2, C3 is connected to the PWM input end; the K end of the diode D6 is connected to one foot of C4, C5 and 5V, and the other foot of the capacitor C4, C5 is connected to the PWM input end;

[0022] In specific implementation, when any temperature of NTC1, NTC2, and NTC3 is too high, MCU U2 determines the over-temperature signal and outputs a low-potential signal from pin 5 to Q2, so that Q2 is turned off, the gate of Q1 becomes high-potential, Q1 is turned off, the power output of the heating is turned off, and the heating stops. When the three temperatures of NTC1, NTC2, and NTC3 are not too high, MCU U2 outputs a high-potential signal from pin 5 to Q2, so that Q2 is turned on, the gate of Q1 becomes low-potential, Q1 is turned on, the power output of the heating is turned on, and the heating works.

[0023] It is understandable that the storage medium may be a magnetic medium, such as a floppy disk, a hard disk, or a magnetic tape; an optical medium, such as a DVD; or a semiconductor medium, such as a solid state drive (SSD).

[0024] In summary, the advantages of the present invention are: the main MCU is used to control the temperature of three heating plates through PWM, and the sub-MCU is used to control high temperature protection through NTC. Features: the host is connected to the heating leg sleeve by 2 wires, which is small in size and easy to install, does not hurt the human body, has high control accuracy, and the main control is simple to connect to the heating leg. Temperature protection can also be achieved when the host is out of control. The temperature protection circuit of the air wave rehabilitation system includes a power supply part, a control part, and a temperature sampling part; the power supply part provides power to the control part, and the temperature sampling part collects the temperature signal to the control part. When the control part receives the temperature and determines that the temperature is too high, it immediately turns off the heating power supply to stop heating, realizing a simple connection. The host is connected to the air wave pressurizing component by 2 wires, which does not affect the host to adjust the temperature through PWM; the size installed on the heating plate is small, easy to install, does not hurt the human body, and has high control accuracy; the excessive temperature value can be set by software; the temperature protection function can also be achieved when the host is out of control.

[0025] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A heating temperature protection circuit for an air wave rehabilitation system, characterized in that: include: A power supply part (10), a control part (20), and a temperature sampling part (30), wherein the temperature sampling part (30) is connected to the control part (20), and the control part (20) is connected to the power supply part (10), the power supply part (10) is used to convert the PWM heating control input sent by the host into the power required by the control part (20) to supply power to it, and the temperature sampling part (30) is used to detect the current temperature signal of the heating plate and transmit it to the control part (20); The temperature sampling part (30) includes an NTC, and the output signal of one end of the NTC is respectively connected to the pin of U2 of the control part (20), and the other end is connected to the voltage terminal of the control part (20); The control part (20) comprises: a precision resistor and a first capacitor and an NTC of a temperature sampling part 30 form a temperature sampling circuit, which sends a temperature signal to the MCU U2; resistors R2, R3, R4, R5, a transistor Q2, a diode D7, and a P MOS tube Q1 form a heating power output control circuit; One pin of the MCU U2 is connected to the power supply of the control part (20), and the other pin is connected to the PWM input terminal; one pin of the precision resistor and the first capacitor are connected to one pin of the MCU U2, and the other pins are connected to the PWM input terminal; One pin of MCU is connected to one pin of resistor R4, the other pin of resistor R4 is connected to the base of transistor Q2 and one pin of resistor R5; the emitter of transistor Q2 and the other pin of resistor R5 are connected to the PWM input terminal; The power supply part comprises: diodes D1, D6, capacitors C2, C3, C4, C5, EC1, and a voltage regulator U1, which are used to convert the PWM power supply into the power supply required by the control part (20), the A end of the diode D1 is connected to the PWM power supply input end, the K end of the diode D1 is connected to the positive electrode of the electrolytic capacitor CE1 and the input end of the voltage regulator U1; the negative electrode of the electrolytic capacitor CE1 and the ground end of the voltage regulator U1 are connected to the PWM input end; the output end of the voltage regulator U1 is connected to one foot of the capacitors C2, C3 and the A end of the diode D6; the other foot of the capacitors C2, C3 is connected to the PWM input end; the K end of the diode D6 is connected to one foot of C4, C5 and the voltage end, and the other foot of the capacitors C4, C5 is connected to the PWM input end.

2. The air wave rehabilitation system heating temperature protection circuit according to claim 1, characterized in that: The temperature sampling part (30) comprises a first NTC1, a second NTC2 and a third NTC3, wherein output signals at one end of the three NTCs are respectively connected to the 3rd, 2nd and 6th pins of U2 of the control part (20), and the other ends are connected together to the voltage end of the control part (20).

3. The air wave rehabilitation system heating temperature protection circuit according to claim 2, characterized in that: The control part (20): precision resistors R6, R7, R8 and capacitors C6, C8, C9 and NTC1, NTC2, NTC3 of the temperature sampling part 30 form a temperature sampling circuit, which sends a temperature signal to the MCU U2; resistors R2, R3, R4, R5, transistor Q2, diode D7, P MOS tube Q1 form a heating power output circuit for controlling the heating power supply; C7 is a power supply filter; and P1 is a program burning port.

4. The air wave rehabilitation system heating temperature protection circuit according to claim 3, characterized in that: Pin 1 of the MCU U2 is connected to a 5V power supply, and pin 8 is connected to a PWM input terminal; one pin of C7 is connected to the power supply of the control part (20); the other pin is connected to the PWM input terminal; one pin of R7 and C8 is connected to pin 2 of the MCU U2, and the other pins are connected to the PWM input terminal; one pin of R6 and C6 is connected to pin 3 of the MCU U2, and the other pins are connected to the PWM input terminal; one pin of R8 and C9 is connected to pin 6 of the MCU U2, and the other pins are connected to the PWM input terminal; pin 4 of P1 is connected to a 5V power supply, pin 1 is connected to the PWM input terminal, and pins 2 and 3 are connected to pins 7 and 4 of the MCU U2 respectively; pin 5 of the MCU is connected to one pin of R4, and the other pin of R4 is connected to the base of Q2 and one pin of R5; the emitter of Q2 and the other pin of R5 are connected to the PWM input terminal; the collector of Q2 is connected to the K terminal of the diode D7; the A terminal of the diode D7 is connected to one pin of the resistor R3; the other pin of the resistor R3 is connected to one pin of the resistor R2 and the gate of the P MOS tube Q1; the other pin of the resistor R2 is connected to the P The K terminals of the source diode D1 of the MOS tube Q1 are connected together; the drain of the PMOS tube Q1 outputs the power supply to the heating plate.

5. The air wave rehabilitation system heating temperature protection circuit according to claim 4, characterized in that: The power supply part: diodes D2, D3, D4, D5, D6, capacitors C1, C2, C3, C4, C5, EC1, EC2, EC3, EC4, EC5, resistor R1, and voltage regulator U1 constitute a power supply processor, which converts the PWM power supply into a DC 5V to supply power to the control part (20); the A end of the diode D1 is connected to the PWM power input end; the A end of the diode D2 is connected to the PWM power input end; the K end of the diode D2 is connected to the A end of the diode D3; the K end of the diode D3 is connected to the A end of the diode D4; the K end of the diode D4 is connected to the A end of the diode D5; the K end of the diode D5 is connected to the capacitor C1 One foot of the electrolytic capacitors CE1, EC2, EC3, EC4, EC5 is connected to the positive electrode of the voltage regulator U1; the other foot of the capacitor C1 is connected to the resistor R1, and the other foot of R1 is connected to the PWM input terminal; the negative electrode of the electrolytic capacitors CE1, EC2, EC3, EC4, EC5 is connected to the ground end of the voltage regulator U1, which is connected to the PWM input terminal; the output terminal of the voltage regulator U1 is connected to one foot of the capacitors C2, C3 and the A terminal of the diode D6; the other foot of the capacitors C2, C3 is connected to the PWM input terminal; the K terminal of the diode D6 is connected to one foot of C4, C5 and connected to the power supply of the control part (20), and the other foot of the capacitors C4, C5 is connected to the PWM input terminal.

6. A heating temperature protection device for an air wave rehabilitation system, characterized in that: The air wave rehabilitation system heating temperature protection device comprises the air wave rehabilitation system heating temperature protection circuit as described in any one of claims 1-5.

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