CN211909202U

CN211909202U - Heating element of moxibustion instrument

Info

Publication number: CN211909202U
Application number: CN202020667471.9U
Authority: CN
Inventors: 项超
Original assignee: Omeda Chongqing Technology Co ltd
Current assignee: Shanghai Qingtou Intelligent Technology Co.,Ltd.
Priority date: 2020-04-27
Filing date: 2020-04-27
Publication date: 2020-11-10
Anticipated expiration: 2030-04-27

Abstract

The utility model discloses a heating element of moxibustion instrument, including heating plate and heating circuit, heating plate and heating circuit connect, heating circuit coupling is to outside controller to receiving heating signal, heating circuit includes a MOS pipe that is used for the heating, and outside controller is coupled with the MOS pipe, and control MOS pipe break-make to the heating method that provides more direct quick break-make has better heating effect.

Description

Heating element of moxibustion instrument

Technical Field

The utility model relates to an electrical apparatus heating technology specifically is a heating element of moxibustion instrument.

Background

The existing heating component for the moxibustion instrument in the market generally adopts resistance wires for heating, and needs a switch element to control the heating of the resistance wires, but the requirement on the uniformity of the resistance wires is very high in the method, otherwise, the phenomenon of overhigh local temperature can be caused, the possibility of scalding a user exists, and when the resistance wires start to be heated, the heating time is delayed for a period of time.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a heating element of moxibustion instrument to the heating methods that provides the quick break-make of more directness has better heating effect.

In order to achieve the above purpose, the utility model provides a following technical scheme: the heating assembly of the moxibustion instrument comprises a heating plate and a heating circuit, wherein the heating plate is connected with the heating circuit, the heating circuit is coupled to an external controller to receive a heating signal, the heating circuit comprises an MOS (metal oxide semiconductor) tube for heating, and the external controller is coupled with the MOS tube and controls the MOS tube to be switched on and off.

As a further improvement of the present invention, the gate of the MOS transistor is coupled to the heating terminal of the controller through a resistor R7.

As a further improvement of the present invention, the gate of the MOS transistor is grounded through a resistor R8.

As a further improvement, the heating circuit is provided with a heating plate temperature detection circuit, which is coupled to the controller to transmit the detected temperature information of the heating plate to the controller.

As a further improvement of the utility model, heat piece temperature detection circuitry includes first thermistor, first thermistor's one end is coupled to the power, and the other end passes through resistance R6 ground connection, the node that first thermistor and resistance R6 are connected is coupled to the sense terminal of controller.

As the utility model discloses a further improvement, still including battery temperature detection circuit, battery temperature detection circuit is coupled with the controller to with battery temperature detection signal transmission to controller.

As a further improvement of the utility model, battery temperature detection circuitry includes second thermistor and resistance R5, resistance R5 is coupled to the power through second thermistor ground connection, the other end, the node that second thermistor and resistance R5 are connected is coupled to the sense terminal of controller.

As a further improvement of the present invention, the second thermistor is disposed in the package of the battery and is connected to the battery in common.

As a further improvement, the battery temperature detection circuit and/or the heating plate temperature detection circuit are coupled with the power supply through voltage stabilizing circuit to obtain the power supply after the steady voltage of controller output.

As a further improvement, the voltage stabilizing circuit includes a voltage stabilizing triode, the negative pole of the voltage stabilizing triode is coupled to the controller through the resistor R4, the anode ground of the voltage stabilizing triode, the reference pole of the voltage stabilizing triode is coupled with the negative pole.

The utility model has the advantages that: compared with a mode of heating by adopting an MOS tube, the mode of heating by adopting the MOS tube has more direct on-off control effect, directly utilizes the switching action of the MOS tube to control, does not need to be additionally connected with a switching element, can simplify a circuit and has better heating effect.

Drawings

Fig. 1 is a schematic circuit diagram of the present invention.

Reference numerals: 1. a heating circuit; 11. an MOS tube; 12. a heater chip temperature detection circuit; 2. a controller; 3. a battery temperature detection circuit; 4. a voltage stabilizing circuit.

Detailed Description

The present invention will be described in further detail with reference to embodiments shown in the drawings.

Referring to fig. 1, the present embodiment discloses a heating assembly of a moxibustion instrument.

The circuit in the moxibustion instrument comprises a controller 2 and a circuit module, the operation and the stop of the circuit module are controlled through the controller 2, the circuit module comprises a heating circuit 1 and a temperature detection circuit, the heating circuit 1 and the temperature detection circuit are both coupled with the controller 2, the controller 2 sends control signals to each module circuit and receives feedback signals from each module circuit, and a series of work of heating, temperature detection and the like of the moxibustion instrument is completed.

When the moxibustion instrument heats, the battery can generate heat because of discharging, and the heating plate can heat up because of continuous heating, and too high temperature has negative effects to the work of moxibustion instrument, also can influence the temperature of battery and other modules when the heating plate high temperature to influence the normal work of battery and other modules, consequently need temperature detection circuit to carry out real-time detection to the battery and the heating plate of moxibustion instrument. The temperature detection circuit comprises a battery temperature detection circuit 3 and a heating sheet temperature detection circuit 12, the battery temperature detection circuit 3 detects the temperature of the battery, the heating sheet temperature detection circuit 12 detects the temperature of the heating sheet, the temperature is fed back to the controller 2 in real time, the normal temperature range of the battery and the heating sheet during working is preset in the controller 2, the detected temperature and the preset temperature range are compared, and if the temperature is abnormal, the controller 2 can control to stop heating. How to preset the temperature range and how to compare are the prior art and are common technical means of those skilled in the art, and the scheme does not relate to the improvement of a software program, so that too much description is not given.

Further, the heater chip temperature detection circuit 12 includes a first thermistor and a resistor R26, the first thermistor is grounded through a resistor R26, the other end of the first thermistor is coupled to a power supply, a node where the first thermistor and the resistor R26 are connected is coupled to a detection end of the controller 2, the first thermistor and the resistor R26 are connected in series to divide voltage, that is, the voltage value obtained by dividing the resistor R26 is fed back to the controller 2, wherein the first thermistor is a thermistor with a negative temperature coefficient, when the temperature of the heater chip increases, the resistance of the first thermistor decreases, the voltage obtained by dividing the resistor R26 increases, the voltage value fed back to the controller 2 also increases, a feedback voltage range at a normal temperature converted according to the normal temperature range is preset in the controller 2, and the two are compared, so that whether the temperature rise of the heater chip exceeds the normal temperature can be timely judged.

Further, the battery temperature detection circuit 3 includes a second thermistor and a resistor R5, the resistor R5 is grounded through the second thermistor, the other end is coupled to the power supply, a node where the second thermistor and the resistor R5 are connected is coupled to the detection end of the controller 2, the second thermistor and the resistor R5 are connected in series to divide voltage, that is, the voltage value obtained by the second thermistor is fed back to the controller 2, wherein the second thermistor is a thermistor with a negative temperature coefficient, when the temperature of the battery rises, the resistance of the second thermistor decreases, the current in the circuit increases, the voltage at two ends of the resistor R5 increases, the voltage at two ends of the second thermistor decreases, and when the controller 2 receives the voltage change condition at two ends of the second thermistor, it can be timely judged whether the temperature rise of the battery exceeds the normal temperature. The second thermistor is arranged in the battery and is grounded with the battery, so that only three leads need to be led out, the material cost is saved, and the interference and unnecessary troubles caused by the large number of leads are reduced.

The thermistor plays a role in detecting temperature, and a temperature detection instrument does not need to be additionally arranged by utilizing the change of a voltage signal in the characteristic feedback circuit of changing the resistance value according to the temperature.

Further, heating plate temperature detect circuit 12 and battery temperature detect circuit 3 all still are coupled to controller 2 through voltage stabilizing circuit 4, voltage stabilizing circuit 4 is coupled to the power, carry out the power of power output and export supply heating plate temperature detect circuit 12 and battery temperature detect circuit 3 after the steady voltage, voltage stabilizing circuit 4 includes a voltage stabilizing triode, voltage stabilizing triode's negative pole is coupled to controller 2 through resistance R4, voltage stabilizing triode's positive pole ground connection, voltage stabilizing triode's reference pole is coupled with the negative pole, voltage stabilizing triode can stabilize the voltage, reduce output voltage's fluctuation, provide stable power for temperature detect circuit, resistance R4 plays the effect of current-limiting, in order to avoid voltage stabilizing triode to be punctured by too high voltage. The voltage-stabilizing triode adopts TL431 which is a controllable precise voltage-stabilizing source, has low noise output voltage and quick on-state response.

The heating circuit 1 is coupled to the heating end of the controller 2 through a resistor R7 and is grounded through a resistor R8, the heating circuit 1 comprises a MOS tube 11, the grid electrode of the MOS tube 1l is coupled to the heating end of the controller 2 through a resistor R7, the source electrode of the MOS tube 11 is grounded, the drain electrode of the MOS tube 11 is coupled to a battery, the battery supplies power to the MOS tube 11, when the controller 2 sends a heating signal to the grid electrode of the MOS tube 11, the MOS tube 11 is conducted, and is directly used for heating due to the low voltage drop, wherein the MOS tube 11 adopts an STN4526 which is an integrated chip, the drain electrode of the MOS tube 11 corresponds to four drain electrode output pins, and the source electrode of the MOS tube 11 corresponds to three source electrode output pins, so that the pins are welded more stably, and meanwhile, the input and the output of the MOS tube 11 are more. Adopt MOS pipe 1l to carry out the mode of heating and compare control resistance wire and heat, have more direct on-off control effect, directly utilize its switching action of self to control, do not need additionally to insert switching element, can simplify the circuit to have better heating effect, can save the cost to a certain extent.

The resistor R7 and the resistor R8 are connected in series to divide voltage, and the resistor R8 also serves as a bleeder resistor to discharge a small amount of static electricity between the gate and the source of the MOS transistor 11, thereby preventing the MOS transistor 11 from generating malfunction, even breaking down the MOS transistor 11, and protecting the MOS transistor 11.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The heating assembly of the moxibustion instrument is characterized by comprising a heating sheet and a heating circuit (1), wherein the heating sheet is connected with the heating circuit (1), the heating circuit (1) is coupled to an external controller (2) to receive a heating signal, the heating circuit (1) comprises an MOS (metal oxide semiconductor) tube (11) for heating, and the external controller (2) is coupled with the MOS tube (11) and controls the MOS tube (11) to be switched on and off.

2. The heating element of the moxibustion instrument according to claim 1, characterized in that the gate of the MOS transistor (11) is coupled to the heating end of the controller (2) through a resistor R7.

3. The heating element of the moxibustion instrument according to claim 1, characterized in that the gate of the MOS tube (11) is connected to ground through a resistor R8.

4. The heating assembly of a moxibustion instrument according to claim 1, characterized in that the heating circuit (1) further comprises a heating plate temperature detection circuit (12), and the heating plate temperature detection circuit (12) is coupled with the controller (2) to transmit the detected temperature information of the heating plate to the controller (2).

5. The heating assembly of moxibustion instrument according to claim 4, characterized in that the heating plate temperature detection circuit (12) comprises a first thermistor, one end of which is coupled to the power supply and the other end is grounded through a resistor R6, and the node where the first thermistor and the resistor R6 are connected is coupled to the detection end of the controller (2).

6. The heating assembly of moxibustion instrument according to claim 4, characterized in that it further comprises a battery temperature detection circuit (3), said battery temperature detection circuit (3) being coupled to the controller (2) for transmitting a battery temperature detection signal to the controller (2).

7. The heating assembly of moxibustion instrument according to claim 6, characterized in that the battery temperature detection circuit (3) comprises a second thermistor and a resistor R5, the resistor R5 is connected to ground through the second thermistor, the other end is connected to the power supply, and the node where the second thermistor and the resistor R5 are connected is connected to the detection end of the controller (2).

8. The heating unit of moxibustion instrument of claim 7 wherein said second thermistor is disposed within the package of the battery and is connected in common with the battery.

9. The heating assembly of moxibustion instrument according to claim 6, characterized in that the battery temperature detection circuit (3) and/or the heating plate temperature detection circuit (12) are coupled to the power supply via the voltage regulation circuit (4) to obtain the regulated power output by the controller (2).

10. The heating assembly of a moxibustion instrument according to claim 9, characterized in that the voltage regulation circuit (4) comprises a voltage regulation transistor, the cathode of the voltage regulation transistor is coupled to the controller (2) through a resistor R4, the anode of the voltage regulation transistor is grounded, and the reference electrode of the voltage regulation transistor is coupled to the cathode.