Double-core heating wire four-wire four-pin circuit of double-partition PTC and NTC heater

Abstract

The utility model provides a double-partition PTC (Positive Temperature Coefficient) and NTC (Negative Temperature Coefficient) heater double-core heating wire four-wire four-pin circuit, which comprises a controller and a blanket body, the blanket body comprises a first partition and a second partition, the first partition comprises a heating wire, a temperature sensing wire, a first partition A-PTC heating wire end, a first partition A-NTC temperature sensing wire end, a first partition B-PTC heating wire end and a first partition B-NTC temperature sensing wire end; the second subarea comprises a heating wire, a temperature sensing wire, a second subarea A-PTC heating wire end, a second subarea A-NTC temperature sensing wire end, a second subarea B-PTC heating wire end and a second subarea B-NTC temperature sensing wire end; the temperature sensing wire ends of the first subarea and the second subarea are connected in series; the controller comprises an AC power supply input module, a fuse, an EMI module, a 5V voltage stabilizing circuit, a main control circuit, a first PTC sampling temperature control module, a first heating drive, a second PTC sampling temperature control module, a second heating drive, an NTC over-temperature protection short circuit protection module, a zero cross detection module, a display, a key module, a controller over-temperature protection circuit and an AC voltage sampling temperature control circuit. And the pins H1-H4 are connected.

Description

Technical Field

[0001] The utility model relates to the technical field of circuits, in particular to a double-zone PTC and NTC heater double-core heating wire 4-wire 4-pin circuit. Background Art

[0002] The dual-zone PTC (positive temperature coefficient) and NTC (negative temperature coefficient) heater is an intelligent heating device that combines two different thermistor elements to achieve precise heating control in different temperature zones. This heater can be widely used in home appliances, automotive parts, medical equipment and other fields, providing efficient and safe heating solutions.

[0003] Dual-zone PTC (positive temperature coefficient) and NTC (negative temperature coefficient) heaters have the following features: Dual-zone control: Two thermistor elements, PTC and NTC, are used to control different heating areas respectively to achieve precise temperature control; Efficient heating: PTC elements have self-limiting temperature characteristics, can output heat stably, heat efficiently, and quickly reach the set temperature; Temperature protection: NTC elements are sensitive to temperature changes and can be used to monitor the operating temperature of the heater to achieve temperature protection and overheating protection functions; Energy saving and environmental protection: PTC heaters are energy-saving and environmentally friendly, which can effectively reduce energy consumption and reduce the impact on the environment.

[0004] Its working principle is as follows: PTC heating area: When the heater is powered on, the PTC element will automatically adjust the resistance value according to the change of current, generate heat and heat up quickly to achieve rapid heating; NTC temperature monitoring: The NTC element is used to monitor the operating temperature of the heater. Once the temperature exceeds the set threshold, the NTC element will send a signal to trigger the temperature protection device to avoid overheating damage. Dual-zone control: PTC and NTC elements are controlled separately; different areas of the heater to achieve regional heating control and improve the stability and safety of the heater; this dual-zone PTC and NTC heater combines the advantages of PTC and NTC, can achieve precise temperature control and efficient heating effect, is suitable for various heating scenarios, and has the characteristics of energy saving, environmental protection, safety and reliability.

[0005] Traditional dual-zone PTC and NTC heaters need to use a 5-wire 5-pin circuit to be electrically connected to the controller, resulting in excessively high product costs and complex circuit connections and wiring processes. Utility Model Content

[0006] 1. Technical issues to be resolved

[0007] In view of the shortcomings of the prior art, the utility model provides a dual-zone PTC and NTC heater dual-core heating wire 4-wire 4-pin circuit, which solves the problem that the traditional dual-zone PTC heater proposed in the above background technology needs to use a 5-wire 5-pin circuit to be electrically connected to the controller, resulting in excessively high product costs and complex circuit connections and wiring processes.

[0008] (II) Technical solution

[0009] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0010] The utility model embodiment provides a dual-zone PTC, NTC heater dual-core heating wire 4-wire 4-pin circuit, including a controller and a blanket body, characterized in that: the blanket body includes: 1 zone and 2 zones, 1 zone includes: heating wire and temperature sensing wire, 1 zone A-PTC heating wire end, 1 zone A-NTC temperature sensing wire end, 1 zone B-PTC heating wire end, 1 zone B-NTC temperature sensing wire end;

[0011] 2 zones include: heating wire and temperature sensing wire, 2 zones A-PTC heating wire end, 2 zones A-NTC temperature sensing wire end, 2 zones B-PTC heating wire end, 2 zones B-NTC temperature sensing wire end;

[0012] The 1-zone A-NTC temperature sensing line end of the 1-zone and the 2-zone B-NTC temperature sensing line end of the 2-zone are connected in series;

[0013] The controller includes: an AC power input module, a fuse F1, an EMI module, a 5V voltage stabilizing circuit, a main control circuit, a first PTC sampling temperature control module, a first heating drive, a second PTC sampling temperature control module, a second heating drive, an NTC over-temperature protection short-circuit protection module, a zero-crossing detection module, a display module, a key module, a controller over-temperature protection circuit, an AC voltage sampling temperature control circuit, a connector pin H1, a connector pin H2, a connector pin H3, and a connector pin H4;

[0014] 1 zone B-PTC heating wire end connected, 2 zone A-PTC heating wire end, plug pin H1 connected. 1 zone A-PTC heating wire connected to plug pin H3; 1 zone B-NTC temperature sensing wire connected to 2 zone A-NTC temperature sensing wire; 2 zone B-PTC heating wire connected to plug pin H2; 2 zone B-NTC temperature sensing wire connected to H4;

[0015] One end of the connector pin H1 is connected to the AC power input module through the fuse F1, and the other end of the connector pin H1 is connected to the B-PTC heating wire end of the 1st zone and the A-PTC heating wire end of the 2nd zone;

[0016] One end of the connector pin H2 is connected to the first heating driver, and the other end of the connector pin H2 is connected to the 2-zone B-PTC heating wire end;

[0017] One end of the connector pin H3 is connected to the second heating driver, and the other end of the connector pin H3 is connected to the A-PTC heating wire end of the 1st zone;

[0018] One end of the connector pin H4 is connected to the NTC over-temperature protection short-circuit protection module, and the other end of the connector pin H4 is connected to the 2-zone B-NTC temperature sensing line end.

[0019] Preferably, one end of the AC power input module is grounded, and the other end is connected to the EMI module via a fuse F1;

[0020] The EMI module is connected to the zero-crossing detection module and the 5V voltage stabilizing circuit;

[0021] The zero-crossing detection module includes a resistor R4 and a resistor R5, which are connected in series to generate a zero-crossing signal which is input to the main control circuit.

[0022] Preferably, the display module is connected to the main control circuit to execute display indication drive output, and the key module is connected to the main control circuit to execute key signal input.

[0023] Preferably, the controller over-temperature protection circuit comprises: an NTC1 thermistor and a resistor R18, which are connected in series, one end of the NTC1 thermistor is connected to a +5V VCC power supply, and the resistor R18 is grounded.

[0024] Preferably, the first PTC sampling temperature control module, the first heating drive, the second PTC sampling temperature control module, and the second heating drive are respectively connected to the main control circuit;

[0025] The main control circuit outputs a heating drive signal to the first heating drive and / or the second heating drive.

[0026] Preferably, the first heating drive and the second heating drive are both thyristor drives.

[0027] Preferably, two sets of this circuit can perform 4-zone heater control.

[0028] The utility model also provides a heater, which is made based on a double-core heating wire 4-wire 4-pin circuit of a double-zone PTC or NTC heater as described above.

[0029] (III) Beneficial effects

[0030] The utility model provides a dual-zone PTC and NTC heater dual-core heating wire 4-wire 4-pin circuit. It has the following beneficial effects:

[0031] Based on the utility model, a dual-zone PTC, NTC heater dual-core heating wire 4-wire 4-pin circuit, the temperature sensing wires of zone 1 and zone 2 are designed to be heated in series, and the plug pin H1 is connected to one end of the heating wires of zone 1 and zone 2, and the plug pins H2 and H3 are independently connected to the zone drive control, and the NTC signal passes through the plug pin H4, enters the A-NTC temperature sensing wire of zone 1, enters the B-NTC temperature sensing wire of zone 1, and then enters the A-NTC temperature sensing wire of zone 2, and enters the B-NTC temperature sensing wire of zone 2. One wire uniformly feeds back the NTC data signal to the main control module to judge whether it is over-temperature. In this way, the temperature data of zone 1 and zone 2 can be independently controlled while reducing the product cost and the more complicated connection and wiring process, simplifying the connection process, reducing the connection time, reducing labor costs, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A functional block diagram of a dual-zone PTC and NTC heater dual-core heating wire 4-wire 4-pin circuit provided by an embodiment of the utility model;

[0033] Figure 2 A dual-zone partial circuit diagram of a dual-zone PTC, NTC heater dual-core heating wire 4-wire 4-pin circuit provided by an embodiment of the utility model;

[0034] Figure 3 A circuit diagram of a dual-zone PTC and NTC heater dual-core heating wire 4-wire 4-pin circuit provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0036] like Figure 1 As shown, the embodiment of the utility model provides a dual-zone PTC, NTC heater dual-core heating wire 4-wire 4-pin circuit, including a controller and a blanket body, characterized in that: the blanket body includes: 1 zone and 2 zones, 1 zone includes: heating wire and temperature sensing wire, 1 zone A-PTC heating wire end, 1 zone A-NTC temperature sensing wire end, 1 zone B-PTC heating wire end, 1 zone B-NTC temperature sensing wire end;

[0037] 2 zones include: heating wire and temperature sensing wire, 2 zones A-PTC heating wire end, 2 zones A-NTC temperature sensing wire end, 2 zones B-PTC heating wire end, 2 zones B-NTC temperature sensing wire end;

[0038] The 1-zone A-NTC temperature sensing line end of the 1-zone and the 2-zone B-NTC temperature sensing line end of the 2-zone are connected in series;

[0039] The controller includes: an AC power input module, a fuse F1, an EMI module, a 5V voltage stabilizing circuit, a main control circuit, a first PTC sampling temperature control module, a first heating drive, a second PTC sampling temperature control module, a second heating drive, an NTC over-temperature protection short-circuit protection module, a zero-crossing detection module, a display module, a key module, a controller over-temperature protection circuit, an AC voltage sampling temperature control circuit, a connector pin H1, a connector pin H2, a connector pin H3, and a connector pin H4;

[0040] 1 zone B-PTC heating wire end connected, 2 zone A-PTC heating wire end, plug pin H1 connected; 1 zone A-PTC heating wire connected to plug pin H3; 1 zone B-NTC temperature sensing wire connected to 2 zone A-NTC temperature sensing wire; 2 zone B-PTC heating wire connected to plug pin H2; 2 zone B-NTC temperature sensing wire connected to H4;

[0041] One end of the connector pin H1 is connected to the AC power input module through the fuse F1, and the other end of the connector pin H1 is connected to the B-PTC heating wire end of the 1st zone and the A-PTC heating wire end of the 2nd zone;

[0042] One end of the connector pin H2 is connected to the first heating driver, and the other end of the connector pin H2 is connected to the 2-zone B-PTC heating wire end;

[0043] One end of the connector pin H3 is connected to the second heating driver, and the other end of the connector pin H3 is connected to the A-PTC heating wire end of the 1st zone;

[0044] One end of the connector pin H4 is connected to the NTC over-temperature protection short-circuit protection module, and the other end of the connector pin H4 is connected to the 2-zone B-NTC temperature sensing line end.

[0045] Preferably, one end of the AC power input module is grounded, and the other end is connected to the EMI module via a fuse F1;

[0046] The EMI module is connected to the zero-crossing detection module and the 5V voltage stabilizing circuit;

[0047] The zero-crossing detection module includes a resistor R4 and a resistor R5, which are connected in series to generate a zero-crossing signal which is input to the main control circuit.

[0048] Preferably, the display module is connected to the main control circuit to execute display indication drive output, and the key module is connected to the main control circuit to execute key signal input.

[0049] Preferably, the controller over-temperature protection circuit comprises: an NTC1 thermistor and a resistor R18, which are connected in series, one end of the NTC1 thermistor is connected to a +5V VCC power supply, and the resistor R18 is grounded.

[0050] Preferably, the first PTC sampling temperature control module, the first heating drive, the second PTC sampling temperature control module, and the second heating drive are respectively connected to the main control circuit;

[0051] The main control circuit outputs a heating drive signal to the first heating drive and / or the second heating drive.

[0052] Preferably, the first heating drive and the second heating drive are both thyristor drives.

[0053] Preferably, two sets of this circuit can perform 4-zone heater control.

[0054] The utility model also provides a heater, which is made based on a double-core heating wire 4-wire 4-pin circuit of a double-zone PTC or NTC heater as described above.

[0055] like Figure 3 The figure shows a circuit diagram of a dual-zone PTC and NTC heater dual-core heating wire 4-wire 4-pin circuit provided by an embodiment of the utility model.

[0056] Working principle: Pin 1 of the main control circuit U1 is the VCC power supply pin, pin 2 is the temperature monitoring pin of the control system, pin 3 is the 2-zone thyristor and heating line abnormality monitoring, pin 4 is ICSPCLK communication, pin 5 is ICSPDAT communication pin and external key command input pin, pin 6 LED indication drive pin, pin 7 LED indication drive pin, pin 8 LED indication drive pin, pin 9 is the 2-zone heating line thyristor drive pin, pin 10 is 1-zone PTC heating line sampling, pin 11 1-zone thyristor and heating line abnormality monitoring, pin 12 is 2-zone PTC heating line sampling, pin 13 is 1-zone heating line thyristor drive pin, pin 14 is the A zone B zone NTC temperature sensing line signal detection pin, pin 15 is the AC input voltage zero crossing detection pin, and pin 16 is the GND pin of the U1 chip. Chip U1 is equipped with a multi-functional reusable IO port that can be used for corresponding functions. Parameters can be adjusted arbitrarily according to different chips and control systems.

[0057] When the circuit is connected, the AC power goes through the fuse F1 and the connector H1 to one end of the temperature sensing line in zones A and B, and then through resistors R11, D2, and D5 to the U3 voltage regulator to output DC5V to U1. Then resistors R3 and R7 give a zero-crossing signal to the INT pin 15 of U1. At this time, the power-on preparation is complete.

[0058] At this time, the signal of NTC is input by resistor R25 through the A-NTC temperature sensing line of partition 1, output by the B-NTC temperature sensing line of partition 1, and then to the A-NTC temperature sensing line of partition 2, and then to the B-NTC temperature sensing line of partition 2, and then to the NTC over-temperature protection short-circuit protection module including: resistor R2, D1 R4 R9, and then to the 14th pin of U1 through the NTC over-temperature protection short-circuit protection module. When the external button inputs the corresponding partition instruction, the output pulse of pin 9 or pin 13 of U1 drives the thyristor of partition 1 or partition 2 to turn on, and the corresponding indicator light is on. Then, according to the corresponding temperature value of the external button instruction, the values ​​of pins 10 and 12 are read for comparison to control the conduction of the thyristor of each partition, thereby controlling the temperature of the heating wire in each zone.

[0059] U1 starts timing after the external input timing data. At this time, due to the increase in the temperature of the heating wire, the signal of NTC coupled to the temperature sensing wire is greater than the signal on R25, and the signal of R25 can be ignored. U1 only reads the NTC signal of the heating wire at the 14th foot to determine whether the heating wire is normal or abnormal. If it exceeds the preset value, it is judged as abnormal use and an error warning is issued. At the same time, the output is turned off to cut off the dual-zone thyristor drive. Otherwise, it continues to run until the next cycle or the timing time ends. When the timing ends, U1 will output a 1hz signal to indicate that this cycle has been completed. During this period, if the temperature of the heating wire thyristor control system is abnormal, U1 will issue an error warning. At this point, all cycle work is completed.

[0060] Based on the utility model, a dual-zone PTC and NTC heater dual-core heating wire 4-wire 4-pin circuit is connected to one end of the heating wire of zone 1 and zone 2 by the plug pin H1, and the plug pins H2 and H3 are independently connected to the zone drive control. The NTC signal passes through the plug pin H4, enters the A-NTC temperature sensing line of zone 1, and then enters the B-NTC temperature sensing line of zone 1, and then enters the A-NTC temperature sensing line of zone 2, and enters the B-NTC temperature sensing line of zone 2. The NTC data signal is uniformly fed back by one line to the main control module to judge whether it is over-temperature. In this way, the temperature data of zone 1 and zone 2 can be independently controlled while reducing the product cost and the more complicated connection and wiring process, simplifying the connection process, reducing the connection time, reducing labor costs, and improving production efficiency.

[0061] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dual-zone PTC and NTC heater with dual core heating The 4-wire 4-pin circuit includes a controller and a blanket body, characterized in that: The blanket body includes: 1 partition and 2 partitions, 1 partition includes: heating wire and temperature sensing wire, 1 partition A-PTC heating wire end, 1 partition A-NTC temperature sensing wire end, 1 partition B-PTC heating wire end, 1 partition B-NTC temperature sensing wire end; 2 zones include: heating wire and temperature sensing wire, 2 zones A-PTC heating wire end, 2 zones A-NTC temperature sensing wire end, 2 zones B-PTC heating wire end, 2 zones B-NTC temperature sensing wire end; The 1-zone A-NTC temperature sensing line end of the 1-zone and the 2-zone B-NTC temperature sensing line end of the 2-zone are connected in series; The controller includes: an AC power input module, a fuse F1, an EMI module, a 5V voltage stabilizing circuit, a main control circuit, a first PTC sampling temperature control module, a first heating drive, a second PTC sampling temperature control module, a second heating drive, an NTC over-temperature protection short-circuit protection module, a zero-crossing detection module, a display module, a key module, a controller over-temperature protection circuit, an AC voltage sampling temperature control circuit, a connector pin H1, a connector pin H2, a connector pin H3, and a connector pin H4; 1 zone B-PTC heating wire end connected, 2 zone A-PTC heating wire end, plug pin H1 connected; 1 zone A-PTC heating wire connected to plug pin H3; 1 zone B-NTC temperature sensing wire connected to 2 zone A-NTC temperature sensing wire; 2 zone B-PTC heating wire connected to plug pin H2; 2 zone B-NTC temperature sensing wire connected to H4; One end of the connector pin H1 is connected to the AC power input module through the fuse F1, and the other end of the connector pin H1 is connected to the B-PTC heating wire end of the 1st zone and the A-PTC heating wire end of the 2nd zone; One end of the connector pin H2 is connected to the first heating driver, and the other end of the connector pin H2 is connected to the 2-zone B-PTC heating wire end; One end of the connector pin H3 is connected to the second heating driver, and the other end of the connector pin H3 is connected to the A-PTC heating wire end of the 1st zone; One end of the connector pin H4 is connected to the NTC over-temperature protection short-circuit protection module, and the other end of the connector pin H4 is connected to the 2-zone B-NTC temperature sensing line end.

2. According to claim 1, a dual-zone PTC, NTC heater double-core heating wire 4-wire 4-pin circuit, characterized in that: One end of the AC power input module is grounded, and the other end is connected to the EMI module through a fuse F1; The EMI module is connected to the zero-crossing detection module and the 5V voltage stabilizing circuit; The zero-crossing detection module includes a resistor R4 and a resistor R5, which are connected in series to generate a zero-crossing signal which is input to the main control circuit.

3. A dual-zone PTC, NTC heater dual-core heating wire 4-wire 4-pin circuit according to claim 1, characterized in that: The display module is connected to the main control circuit to execute display indication drive output, and the key module is connected to the main control circuit to execute key signal input.

4. A dual-zone PTC, NTC heater dual-core heating wire 4-wire 4-pin circuit according to claim 1, characterized in that: The controller over-temperature protection circuit comprises: an NTC1 thermistor and a resistor R18, which are connected in series, one end of the NTC1 thermistor is connected to a +5V VCC power supply, and the resistor R18 is grounded.

5. A dual-zone PTC, NTC heater dual-core heating wire 4-wire 4-pin circuit according to claim 1, characterized in that: The first PTC sampling temperature control module, the first heating driver, the second PTC sampling temperature control module, and the second heating driver are respectively connected to the main control circuit; The main control circuit outputs a heating drive signal to the first heating drive and / or the second heating drive.

6. A dual-zone PTC, NTC heater dual-core heating wire 4-wire 4-pin circuit according to claim 5, characterized in that: The first heating drive and the second heating drive are both thyristor drives.

7. A dual-zone PTC, NTC heater dual-core heating wire 4-wire 4-pin circuit according to claim 1, characterized in that: Two sets of this circuit can perform 4-zone heater control.

8. A heater, characterized in that: It is made based on a double-zone PTC, NTC heater double-core heating wire 4-wire 4-pin circuit as described in any one of claims 1-6.

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