CN206777407U - A kind of heated gutta-percha filling gun temperature control equipment based on PWM - Google Patents
A kind of heated gutta-percha filling gun temperature control equipment based on PWM Download PDFInfo
- Publication number
- CN206777407U CN206777407U CN201621492202.3U CN201621492202U CN206777407U CN 206777407 U CN206777407 U CN 206777407U CN 201621492202 U CN201621492202 U CN 201621492202U CN 206777407 U CN206777407 U CN 206777407U
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- China
- Prior art keywords
- filling gun
- temperature control
- heated
- control equipment
- heater
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a kind of heated gutta-percha filling gun temperature control equipment based on PWM, including filling gun heater, the cold junction compensation digital quantizer (ADC) being connected with heater, and the microprocessor (MCU) being connected with cold junction compensation digital quantizer in addition to the PWM controller being connected with microprocessor, the MOSFET drive devices being connected with PWM controller.The device utilizes Seebeck principle, heated using the resistance wire of two different materials and temperature control, solve the problems, such as that heated gutta-percha filling gun packaging technology present in prior art is cumbersome, while reduce component number, constant temperature corresponding speed and precision are improved, improves heating efficiency.
Description
Technical field
The utility model belongs to type medical instrument for dental use field, and in particular to a kind of heated gutta-percha filling gun temperature based on PWM
Spend control device.
Background technology
Root-canal filling heated gutta-percha is the important step of endodontic procedure, and among stowing operation, filling gun passes through inside
Electric-heating-wire-heating melts gutta-percha, and in gutta-percha fusion process, heating-up temperature must be constant in the range of some, if heating
Temperature is too low to cause gutta-percha not to be completely melt, gutta-percha mobility is poor, cause gutta-percha not extrude., whereas if temperature mistake
Height, then can make that gutta-percha mobility is excessive, and stowing operation gutta-percha can flow out automatically, and stowing operation is easily out of control, scald unavoidably
Patient.Therefore, a good heated at constant temperature process is particularly important for filling gun.
At present, the heater (such as Fig. 1) of the existing filling gun of in the market be using two source line groups into resistance wire
Heater block (12) heats to heating part (11), the temperature-measuring part that the temperature sensor formed with two thermometric lines combines
(13) temperature control is carried out, wherein power line is only used for heating, and temperature sensor is only used for thermometric, and microprocessor is by analyzing temperature
Sensor return data is spent, heating-up temperature is accurately controlled, gutta-percha is reached the effect of heated at constant temperature.In order to ensure temperature
The accuracy of measurement, in structure assembling process, the thermometric line of each heating part must be fixedly arranged at identical position, and heat
Part and temperature measurement fraction are separated with insulating tape, and due to the otherness of packaging technology, assembling the product to get off finally needs to carry out
Debug one by one, to ensure the uniformity of heating-up temperature, packaging technology is cumbersome.
Utility model content
For overcome the deficiencies in the prior art, the utility model provides a kind of heated gutta-percha filling gun temperature based on PWM
Control device, solve the problems, such as that heated gutta-percha filling gun packaging technology is cumbersome existing for prior art, while first device can be reduced
Number of packages amount, constant temperature corresponding speed and precision are improved, improve heating efficiency.
The purpose of this utility model is achieved through the following technical solutions.
A kind of heated gutta-percha filling gun temperature control equipment based on PWM, including filling gun heater, be connected with heater
Cold junction compensation digital quantizer (ADC), and the microprocessor (MCU) that is connected with cold junction compensation digital quantizer in addition to
The PWM controller being connected with microprocessor, the MOSFET drive devices being connected with PWM controller.
The filling gun heater by two different materials conductor or semiconductor group into.
The microprocessor has logic processing capability, can gather the electromotive force of heater resistance wire both ends passback, and divide
Separate out temperature corresponding to the electromotive force.
The cold junction compensation digital quantizer can be handled the weak voltage signal of heater resistance wire, and be converted to number
Word signal, send data signal to microprocessor.
The MOSFET drive devices are connected with power supply, drive heater.
The heating power at the PWM controller control resistance wire both ends, reach the purpose of heated at constant temperature.
The beneficial effects of the utility model are：The utility model provides a kind of heated gutta-percha filling gun temperature based on PWM
Spend control device, using both threads heating and temperature control, using Seebeck (Seebeck) effect, due to two kinds of different electric conductors or
The temperature difference of semiconductor and cause the pyroelectric phenomena of the voltage difference between two kinds of materials.Using the principle, this patent is in heating electric
Hinder silk both ends to be connected with the wire of different materials respectively, microprocessor utilizes the low level time of heated at high speed switching, to gather
The electromotive force of resistance wire both ends passback, analyze the temperature of this electromotive force representative.Resistance wire both ends are controlled by high-frequency PWM again
Heating power, so as to reach the purpose of heated at constant temperature.This utility model patent can simplify heating process, reduce component number,
Optimize technique, improve constant temperature response speed and precision.
Brief description of the drawings
Fig. 1 is the structure consciousness figure of existing filling gun heater.
Fig. 2 is the structural representation of the utility model filling gun heater.
Fig. 3 is the utility model principle block diagram.
In figure, 11 be heated metal part, and 2 be Resistant heating part, and 13 be temperature-measuring part, and 21 be heated part, and 22 be to add
Hot device.
Embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples.
As shown in figure 3, a kind of heated gutta-percha filling gun temperature control equipment based on PWM of the utility model, including filling
Rifle heater, the cold junction compensation digital quantizer being connected with heater, and the micro- place being connected with cold junction compensation digital quantizer
Manage device (MCU) in addition to the PWM controller being connected with microprocessor, the MOSFET drive devices being connected with PWM controller.
Microprocessor (MCU) has logic processing capability, can gather the electromotive force of heating plate resistance wire both ends passback, and divide
Temperature corresponding to the electromotive force is separated out, its mapping table see the table below 1 bronze medal-corronil thermocouple (T-shaped) phasing meter.
1 bronze medal of table-corronil thermocouple (T-shaped) phasing meter (0 DEG C of above section)
Reference junction temperature：0℃E(mV)
The cold junction compensation digital quantizer can be handled the weak voltage signal of heater resistance wire, and be converted to number
Word amount, send data signal to microprocessor.
MOSFET drive devices are connected with power supply, drive heater.
The heating power at PWM controller control resistance wire both ends, reach the purpose of heated at constant temperature.
As shown in Fig. 2 the heater (22) of filling gun is made up of the conductor or semiconductor resistor silk of two different materials,
Preferred copper-the corronil of its material, heater (22) heats to heated part (21), and temperature is entered using Seebeck principle
Row control.
The utility model provides a kind of heated gutta-percha filling gun temperature control equipment based on PWM, using both threads plus
Heat and temperature control, using Seebeck (Seebeck) effect, cause two due to the temperature difference of two kinds of different electric conductors or semiconductor
The pyroelectric phenomena of voltage difference between kind material.Using the principle, this patent is at heating resistance wire both ends respectively with different materials
Wire connects, and microprocessor utilizes the low level time of heated at high speed switching, to gather the electromotive force of resistance wire both ends passback, point
Separate out the temperature of this electromotive force representative.The heating power at resistance wire both ends is controlled by high-frequency PWM again, so as to reach heated at constant temperature
Purpose.
The material for two different resistance wires that the present embodiment preferably uses is respectively copper-corronil, can also be nickel chromium triangle-
Nisiloy, nickel chromium triangle silicon-nisiloy, nickel chromium triangle-corronil, iron/copper nickel alloy etc..
Above is preferred embodiment of the present utility model is illustrated, but the utility model is created and is not limited to
The embodiment, those skilled in the art can also make a variety of equivalent on the premise of without prejudice to the utility model spirit
Deformation or replacement, these equivalent deformations or replacement are all contained in the application claim limited range.
Claims (8)
1. a kind of heated gutta-percha filling gun temperature control equipment based on PWM, including heater, digital quantizer, microprocessor,
PWM controller and MOSFET drive devices, it is characterised in that heater connect digital quantizer, digital quantizer connection with it is micro-
Processor, microprocessor connection PWM controller, PWM controller connection MOSFET drive devices.
2. heated gutta-percha filling gun temperature control equipment according to claim 1, it is characterised in that the heater is by two
Resistance wire made of root different materials forms, and heater heats to the heated part of heated gutta-percha filling gun, and utilizes and fill in shellfish
Gram principle is controlled to temperature.
3. heated gutta-percha filling gun temperature control equipment according to claim 1, it is characterised in that the microprocessor utensil
There are logic processing capability, the electromotive force of collection heater resistance wire both ends passback, and analyze temperature corresponding to the electromotive force.
4. heated gutta-percha filling gun temperature control equipment according to claim 1, it is characterised in that described numeral conversion
Device is cold junction compensation digital quantizer, and the weak voltage signal of heater resistance wire is handled, and is converted to data signal, will
Data signal sends microprocessor to.
5. heated gutta-percha filling gun temperature control equipment according to claim 1, it is characterised in that the MOSFET drivings
Device is connected with power supply, drives heated gutta-percha filling gun temperature control equipment.
6. heated gutta-percha filling gun temperature control equipment according to claim 1, it is characterised in that the PWM controller
The heating power at resistance wire both ends is controlled, reaches the purpose of heated at constant temperature.
7. heated gutta-percha filling gun temperature control equipment according to claim 2, it is characterised in that heater wherein one
The material of resistance wire is copper, and the material of another resistance wire is corronil.
8. heated gutta-percha filling gun temperature control equipment according to claim 2, it is characterised in that the material of resistance wire is
The combination of any one group of material in nickel chromium triangle-nisiloy, nickel chromium triangle silicon-nisiloy, nickel chromium triangle-corronil, iron/copper nickel alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621492202.3U CN206777407U (en) | 2016-12-31 | 2016-12-31 | A kind of heated gutta-percha filling gun temperature control equipment based on PWM |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621492202.3U CN206777407U (en) | 2016-12-31 | 2016-12-31 | A kind of heated gutta-percha filling gun temperature control equipment based on PWM |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206777407U true CN206777407U (en) | 2017-12-22 |
Family
ID=60703372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621492202.3U Expired - Fee Related CN206777407U (en) | 2016-12-31 | 2016-12-31 | A kind of heated gutta-percha filling gun temperature control equipment based on PWM |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206777407U (en) |
-
2016
- 2016-12-31 CN CN201621492202.3U patent/CN206777407U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171222 Termination date: 20191231 |