CN111123680A - Printer and heating control circuit and heating device thereof - Google Patents
Printer and heating control circuit and heating device thereof Download PDFInfo
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- CN111123680A CN111123680A CN201811295804.3A CN201811295804A CN111123680A CN 111123680 A CN111123680 A CN 111123680A CN 201811295804 A CN201811295804 A CN 201811295804A CN 111123680 A CN111123680 A CN 111123680A
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- heating
- circuit
- feedback
- pulse width
- printer
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
- G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
- G03G15/2014—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat
- G03G15/2039—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat with means for controlling the fixing temperature
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
- G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
- G03G15/2014—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat
- G03G15/2053—Structural details of heat elements, e.g. structure of roller or belt, eddy current, induction heating
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fixing For Electrophotography (AREA)
Abstract
The invention discloses a printer and a heating control circuit and a heating device thereof, wherein the heating control circuit comprises: a pulse width modulation circuit for generating a pulse width modulation signal; the feedback end of the feedback circuit is used for being connected with the input ends of the heating module and the heating module respectively, receiving a temperature feedback signal of the heating module and an input voltage feedback signal of the heating module, adjusting an input signal of the pulse width modulation circuit, and the output end of the feedback circuit is connected with the pulse width modulation circuit; and one end of the voltage regulating circuit is connected with a voltage source of the heating module, and the other end of the voltage regulating circuit is connected with the output end of the pulse width modulation circuit and is used for outputting corresponding heating voltage to the heating module under the regulation of the pulse width modulation signal. The feedback circuit adjusts the input signal of the pulse width modulation circuit according to the feedback of the temperature feedback signal of the heating module and the double feedback of the input voltage feedback signal of the heating module, so that the feedback adjustment can be more accurately carried out, and the heating temperature can be more accurately controlled.
Description
Technical Field
The invention relates to the technical field of household appliances, in particular to a printer, a heating control circuit and a heating device thereof.
Background
A fuser of a laser printer usually needs a heating device to heat for fusing, and in the prior art, the heating principle generally adopts commercial power heating, specifically, the heating principle refers to a heating control principle diagram shown in fig. 1, as shown in fig. 1, a switch control signal G1 is a high-low level signal to control the on/off of a relay U1, when the relay is closed, a pulse width modulation signal G2 controls the on/off of a thyristor Q1, and according to the temperature of a heating lamp tube L1 fed back by a temperature sensor, the pulse width of the pulse width modulation signal is adjusted to control the on time of the thyristor, and then the heating and off time of the heating lamp tube is controlled to realize the heating and temperature control of the heating lamp tube; the control for adjusting the pulse width modulation signal adopts software control, which consumes system resources on a chip and causes inaccurate control.
Disclosure of Invention
In view of the problem of inaccurate temperature control of a fixing heating device in the prior art, according to a first aspect, an embodiment of the present invention provides a printer heating control circuit for controlling a printer heating module, including: a pulse width modulation circuit for generating a pulse width modulation signal; the voltage regulating circuit is connected with the output end of the pulse width modulation circuit and is used for outputting corresponding voltage to the heating module under the regulation of the pulse width modulation signal; and a feedback circuit, a feedback end of which is used for being connected with the output ends of the heating module and the voltage regulating circuit respectively, and used for receiving the temperature feedback signal of the heating module and the voltage feedback signal output by the voltage regulating circuit and adjusting the input signal of the pulse width modulation circuit, and an output end of the feedback circuit is connected with the pulse width modulation circuit.
Optionally, the feedback circuit comprises: the first input signal used for representing the set temperature of the heating module is input to the first non-inverting input end of the first operational amplifier; the first reverse input end inputs the temperature feedback signal and performs feedback regulation on the first input signal of the set temperature of the heating module; and the input of a second non-inverting input end of the second operational amplifier is connected with the first output end of the first operational amplifier, and the input of a second inverting input end of the second operational amplifier is used for inputting the voltage feedback signal and carrying out feedback regulation on the signal output by the first operational amplifier.
Optionally, the voltage regulating circuit comprises: and the control end of the switching tube is connected with the output end of the pulse width modulation circuit and is used for controlling the switching of the switching tube under the triggering of a pulse width modulation signal, the first end of the switching tube is connected with a power supply, and the other end of the switching tube is connected with the heating module.
Optionally, the voltage regulating circuit further comprises: and the filter circuit is arranged between the switch tube and the heating module.
According to a second aspect, an embodiment of the present invention provides a printer heating apparatus, including: a heating module; a printer heating control circuit as claimed in any one of the above first aspects; and the alternating current-direct current module is connected with the heating control circuit and used for converting alternating current into direct current and supplying power to the heating module through the printer heating control circuit.
Optionally, the heating module is attached to a heating roller of the heating device.
Optionally, the heating module comprises: at least one of a heating wire, a heating strip, and a heating sheet.
Optionally, the input of the ac-dc module is electrically isolated from the output of the ac-dc module.
According to a third aspect, an embodiment of the present invention provides a printer, including: a body; a printer heating apparatus as claimed in any one of the second aspect above.
The printer and the heating control circuit and the heating device thereof provided by the embodiment of the invention are used for generating pulse width modulation signals through the pulse width modulation circuit; a feedback circuit, a feedback end of which is used for being connected with the input ends of the heating module and the heating module respectively, and is used for receiving a temperature feedback signal of the heating module and an input voltage feedback signal of the heating module, adjusting an input signal of the pulse width modulation circuit, and an output end of which is connected with the pulse width modulation circuit; and one end of the voltage regulating circuit is connected with the voltage source of the heating module, and the other end of the voltage regulating circuit is connected with the output end of the pulse width modulation circuit and is used for outputting corresponding heating voltage to the heating module under the regulation of the pulse width modulation signal. The feedback circuit adjusts the input signal of the pulse width modulation circuit according to the feedback of the temperature feedback signal of the heating module and the dual feedback of the input voltage feedback signal of the heating module so as to perform feedback adjustment more accurately.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 shows a schematic diagram of a prior art printer heating control circuit;
FIG. 2 shows a modular schematic of the printer heating control circuit of the present embodiment;
FIG. 3 is a schematic diagram showing a heating control circuit of the printer according to the present embodiment;
fig. 4 shows a schematic diagram of the printer heating apparatus of the present embodiment.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An embodiment of the present invention provides a printer heating control circuit, configured to control a printer heating module, specifically as shown in fig. 1, where the heating control circuit includes: a pulse width modulation circuit 10 for generating a pulse width modulation signal; and the voltage regulating circuit 30 is connected with the output end of the pulse width modulation circuit 20 and is used for outputting corresponding voltage to the heating module under the regulation of the pulse width modulation signal. A feedback circuit 20, a feedback end of which is used for being connected with the output ends of the heating module and the voltage regulating circuit 30 respectively, and is used for receiving the temperature feedback signal of the heating module and the voltage feedback signal output by the voltage regulating circuit 30 and adjusting the input signal of the pulse width modulation circuit 10, and an output end of which is connected with the pulse width modulation circuit 10; in a specific embodiment, the temperature feedback signal may be collected by a temperature sensor, and the temperature sensor may be disposed on the heating module or around the heating module. The output voltage feedback signal of the voltage regulating circuit 30, i.e., the input voltage of the heating module, can be collected by a photoelectric coupler, and can be used for collecting voltage signals, electrically isolating the input end from the output end, and feeding back other feedback circuits without electrical isolation performance. The feedback circuit 20 adjusts the input signal of the pulse width modulation circuit 10 according to the feedback of the temperature feedback signal of the heating module and the feedback of the input voltage feedback signal of the heating module, so as to perform feedback adjustment more accurately, the pulse width modulation signal outputted by the pulse width modulation circuit 10 controls the voltage regulating circuit 30 to regulate the input voltage of the heating module, and the heating time or the heating stop time of the heating device can be controlled more accurately, so as to control the heating temperature more accurately.
In an alternative embodiment, as shown in fig. 2, the feedback circuit 20 may include: a first operational amplifier 21, wherein a first input signal for representing the set temperature of the heating module is input at a first non-inverting input end; the first reverse input end inputs a temperature feedback signal and performs feedback regulation on a first input signal of the set temperature of the heating module; and a second operational amplifier 22, wherein a second non-inverting input terminal is connected to the first output terminal of the first operational amplifier 21, and a second inverting input terminal is connected to a voltage feedback signal for performing feedback adjustment on the signal output by the first operational amplifier 21.
In an alternative embodiment, the voltage regulating circuit 30 may include: a switching tube Q2, the control end of which is connected with the output end of the pulse width modulation circuit 10 and is used for controlling the on-off of the switching tube Q2 under the triggering of the pulse width modulation signal, the first end of the switching tube Q2 is connected with the power supply, and the other end is connected with the heating module 100; the inductor L is arranged between the switch tube Q2 and the heating module, the cathode of the diode D1 is connected between the inductor L and the switch tube, the anode of the diode is grounded, the switch tube Q2 can comprise any one of a triode, a MOS (metal oxide semiconductor) tube or a thyristor, when the switch tube Q2 is turned on, the inductor is charged by a power supply, when the switch tube Q2 is turned off, the inductor and the diode are output through a path, and therefore the voltage input into the heating module can be adjusted, for example, the power supply voltage is 24V, and under the control of a pulse width modulation signal, the output voltage at the rear end of the inductor, namely the input voltage of the heating module, can be any value between 0V and 24V. Different input voltages correspond to different heating temperatures, so that the heating temperature can be correspondingly and accurately adjusted by accurately adjusting the voltage. In this embodiment, the voltage regulating circuit 30 may further include: and the energy storage filter circuit is arranged between the inductor and the heating module. The energy storage filter circuit can comprise an energy storage capacitor, and the energy storage capacitor is used for filtering the voltage output by the voltage regulating circuit and storing energy so as to ensure that stable output voltage is maintained.
An embodiment of the present invention further provides a printer heating apparatus, as shown in fig. 3, including: a heating module 100; the printer heating control circuit 200 described in the above embodiment; and an ac-dc circuit 300 connected to the heating control circuit 200 for converting ac power into dc power to supply power to the heating module 100 through the printer heating control circuit 200. The heating module 100 is powered by a direct-current low-voltage power supply, and can change the power supply of the whole machine into an alternating-current power supply for input and a direct-current low-voltage power supply for output, and the alternating current with higher voltage is not required to be output, so that the heating module can be changed into an external power adapter, and the circuit design of the heating device and the printer is simplified.
In an alternative embodiment, the heating module 100 is attached to the heating roller, and includes: at least one of the heating wire, the heating strip and the heating sheet can adopt a metal heating wire, a metal heating strip and a metal heating sheet in the implementation, the metal heating wire can not only reduce the cost, but also be clung to the heating roller, and the required power is greatly reduced without adopting an internal radiation heating mode like a heating lamp heating roller. In this embodiment, the heating module is not limited to the heating module described above, and any heating device that can be attached to the heating roller and directly heat the heating roller is within the scope of the present embodiment
The embodiment of the invention provides a printer, which comprises a printer body and a printer heating device in the embodiment, wherein the temperature of a printer fixer can be accurately controlled, the printing effect of the printer is ensured, an input alternating current power supply is electrically isolated from an output direct current power supply, and a low-voltage direct current voltage is adopted to supply power to the heating device and other electric equipment of the printer, so that the electrical isolation of the printer is simplified, and the use safety of the printer is ensured.
Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.
Claims (9)
1. A printer heating control circuit for controlling a printer heating module, comprising:
a pulse width modulation circuit for generating a pulse width modulation signal;
the voltage regulating circuit is connected with the output end of the pulse width modulation circuit and is used for outputting corresponding voltage to the heating module under the regulation of the pulse width modulation signal;
and a feedback circuit, a feedback end of which is used for being connected with the output ends of the heating module and the voltage regulating circuit respectively, and used for receiving the temperature feedback signal of the heating module and the voltage feedback signal output by the voltage regulating circuit and adjusting the input signal of the pulse width modulation circuit, and an output end of the feedback circuit is connected with the pulse width modulation circuit.
2. The printer heating control circuit of claim 1, wherein the feedback circuit comprises:
the first input signal used for representing the set temperature of the heating module is input to the first non-inverting input end of the first operational amplifier; the first reverse input end inputs the temperature feedback signal and performs feedback regulation on the first input signal of the set temperature of the heating module;
and the input of a second non-inverting input end of the second operational amplifier is connected with the first output end of the first operational amplifier, and the input of a second inverting input end of the second operational amplifier is used for inputting the voltage feedback signal and carrying out feedback regulation on the signal output by the first operational amplifier.
3. The printer heating control circuit of claim 1, wherein said voltage regulation circuit comprises:
and the control end of the switching tube is connected with the output end of the pulse width modulation circuit and is used for controlling the switching of the switching tube under the triggering of a pulse width modulation signal, the first end of the switching tube is connected with a power supply, and the other end of the switching tube is connected with the heating module.
4. The printer heating control circuit of claim 1, wherein said voltage regulation circuit further comprises:
and the filter circuit is arranged between the switch tube and the heating module.
5. A printer heating device, comprising:
a heating module;
the printer heating control circuit of any one of claims 1-4; and
and the alternating current-direct current module is connected with the heating control circuit and used for converting alternating current into direct current and supplying power to the heating module through the printer heating control circuit.
6. Printer heating device according to claim 5,
the heating module is attached to a heating roller of the heating device.
7. The printer heating apparatus of claim 6, wherein said heating module comprises: at least one of a heating wire, a heating strip, and a heating sheet.
8. The printer heating apparatus of any one of claims 5 to 7, wherein an input of said AC-DC module is electrically isolated from an output of said AC-DC module.
9. A printer, comprising:
a body;
the printer heating apparatus of any one of claims 5 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811295804.3A CN111123680A (en) | 2018-11-01 | 2018-11-01 | Printer and heating control circuit and heating device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811295804.3A CN111123680A (en) | 2018-11-01 | 2018-11-01 | Printer and heating control circuit and heating device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111123680A true CN111123680A (en) | 2020-05-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811295804.3A Pending CN111123680A (en) | 2018-11-01 | 2018-11-01 | Printer and heating control circuit and heating device thereof |
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| Country | Link |
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| CN (1) | CN111123680A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1480333A (en) * | 2002-09-03 | 2004-03-10 | 杭州宏华数码科技股份有限公司 | Method for adjusting driving voltage of piezoelectric type ink jet printing header and adjusting device |
| CN101078905A (en) * | 2006-05-26 | 2007-11-28 | 株式会社理光 | Fixing device, imaging forming device, heating control method and device |
| CN101114153A (en) * | 2006-07-28 | 2008-01-30 | 三星电子株式会社 | Phase controlling device, fuser controlling device having the same, and phase controlling method |
| US20090003868A1 (en) * | 2007-03-30 | 2009-01-01 | Canon Kabushiki Kaisha | Image forming apparatus |
| CN105373152A (en) * | 2014-08-21 | 2016-03-02 | 三纬国际立体列印科技股份有限公司 | Heating control device and control method thereof |
-
2018
- 2018-11-01 CN CN201811295804.3A patent/CN111123680A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1480333A (en) * | 2002-09-03 | 2004-03-10 | 杭州宏华数码科技股份有限公司 | Method for adjusting driving voltage of piezoelectric type ink jet printing header and adjusting device |
| CN101078905A (en) * | 2006-05-26 | 2007-11-28 | 株式会社理光 | Fixing device, imaging forming device, heating control method and device |
| CN101114153A (en) * | 2006-07-28 | 2008-01-30 | 三星电子株式会社 | Phase controlling device, fuser controlling device having the same, and phase controlling method |
| US20090003868A1 (en) * | 2007-03-30 | 2009-01-01 | Canon Kabushiki Kaisha | Image forming apparatus |
| CN105373152A (en) * | 2014-08-21 | 2016-03-02 | 三纬国际立体列印科技股份有限公司 | Heating control device and control method thereof |
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| CB02 | Change of applicant information | ||
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Address after: 300450 room 310, No.1 Second Street, airport international logistics zone, pilot free trade zone (Airport Economic Zone), Dongli District, Tianjin Applicant after: Zhixiang Technology Co.,Ltd. Address before: 300450 room 310, No.1 Second Street, airport international logistics zone, pilot free trade zone (Airport Economic Zone), Dongli District, Tianjin Applicant before: LENOVO IMAGE (TIANJIN) TECHNOLOGY Co.,Ltd. |
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Application publication date: 20200508 |