CN101118408A - Image forming device - Google Patents
Image forming device Download PDFInfo
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- CN101118408A CN101118408A CNA2007101376958A CN200710137695A CN101118408A CN 101118408 A CN101118408 A CN 101118408A CN A2007101376958 A CNA2007101376958 A CN A2007101376958A CN 200710137695 A CN200710137695 A CN 200710137695A CN 101118408 A CN101118408 A CN 101118408A
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Abstract
The invention provies an image forming device. At a driving initial stage of a fixing heater, a control unit uses electric power from source power supply (8) to heat a first fixing heater and when the PWN controlor (723c) and MOS transistor (723b) make a boost installation (723) stop the driving state, electric power from an electrical storage device (722) heats the second fixing heater (732). In addition, after the dash current of the second fixing heater is reduced, the control unit provides the electric power from the electrical storage device to the second fixing heater after boosting, at the state of driving the boost installation by the PWN controlor and MOS transistor. Thus, during flowing through the dash current, the electrical storage device supplies power to the second fixing heater without damage by dash current in the boost installation.
Description
Technical field
The present invention relates to image processing system, particularly relate to the technology of control to the photographic fixing portion power supply that makes toner fixing by heating on recording chart.
Background technology
In image processing systems such as duplicating machine, the image processing system that has is in initial start stage or stopped under the state of fixing heater power supply, when being in the stand-by energy-saving pattern that supplies printing, for shorten fixing roller reach can fixing temperature time, use two kinds of power supplys of source power supply and accessory power supply (for example double charge layer capacitor etc.) simultaneously, make big electric current flow through fixing heater and come heat fixing roll.Because the voltage low (being generally 2.5V) of the double charge layer capacitor monomer that in this image processing system, uses as accessory power supply, so shown in following patent documentation (spy opens the 2003-297526 communique), utilize booster circuit that the suitable voltage that provides to fixing heater is provided the voltage of double charge layer capacitor, and the electric power of double charge layer capacitor is offered fixing heater.
Usually, halogen heater as the fixing heater use, be low resistance under the normal temperature state before heating, in case when beginning to heat, apply voltage, then owing to flow through the dash current of the several times of rated current～tens of times, described booster circuit makes its coil state that reaches capacity, the function of can not bringing into normal play because of this dash current, so when fixing roller begins to heat, flow through during the dash current, control the power supply of not carrying out double charge layer capacitor and booster circuit.; if avoiding the control standby always of dash current falls after rise to dash current; then be lengthened to the moment of the necessary heating efficiency of fixing heater performance start-up time, promptly have the elongated problem of time that makes fixing roller reach temperature that can photographic fixing.In addition, also propose a kind of structure, that is, the impulse-current-proof circuit of avoiding described dash current has been set between booster circuit and fixing heater, when suppressing electric current, driven booster circuit.But it is indispensable in this case, being equipped with the impulse-current-proof circuit.
Summary of the invention
In order to solve described problem, the objective of the invention is to, even during flowing through dash current, utilize low cost structure also can accomplish to avoid the harm that dash current caused in the booster circuit, and can power to second fixing heater from accessory power supply, thus shorten be used to make fixing roller reach can photographic fixing the temperature time necessary.
That is, image processing system of the present invention comprises: accessory power supply has capacitor; Fixing heater, use from power-actuated first fixing heater of external power source and have halogen heater and the photographic fixing portion of toner fixing on recording chart being heated, having by power-actuated second fixing heater from described accessory power supply; Booster circuit, by the insulated type converter after promoting from the output voltage of described accessory power supply, output to described second fixing heater, the elementary side of described insulated type converter is connected on the described accessory power supply, and an end of a secondary side is connected on described second fixing heater, and the other end is connected on the described accessory power supply; And control device, control is to the power supply of described fixing heater, wherein, one end of described second fixing heater is connected a secondary side of described booster circuit, the other end is connected on the described accessory power supply, described control device is at the driving initial stage of described fixing heater, use electric power that described first fixing heater is driven from described external power source, and do not superpose from the output of described booster circuit, only use electric power that described second fixing heater is driven from described accessory power supply, after during flowing through described second fixing heater through dash current, output from this booster circuit is superimposed upon in the output of described accessory power supply, again the output after this stack is offered described second fixing heater.
According to this formation, control device was used the output from external power source to drive first fixing heater, and is not superposeed from the output of booster circuit at the driving initial stage of fixing heater, only used the output from accessory power supply to drive second fixing heater.Like this,, in booster circuit, can not produce the harm that causes by dash current yet, can power to second fixing heater from accessory power supply even during flowing through dash current, thus can shorten make fixing roller arrive can photographic fixing the temperature time necessary.
Description of drawings
Fig. 1 is the side view of schematic representation as the compounding machine inner structure of an example of image processing system of one embodiment of the present invention.
Fig. 2 is the expression fixing device that has of compounding machine and the synoptic diagram of inner structure on every side thereof.
Fig. 3 be the expression first embodiment increasing apparatus brief configuration and with the circuit diagram of the annexation of the electrical storage device and second fixing heater.
Fig. 4 is the process flow diagram that expression has the fixing device 7 startup control systems of the first embodiment increasing apparatus 723.
Fig. 5 is the circuit diagram that expression has the fixing device initial start stage current path of the first embodiment increasing apparatus.
Fig. 6 is the circuit diagram that expression has the fixing device startup later stage current path of the first embodiment increasing apparatus.
Fig. 7 A is the sequential chart of fixing device with the first embodiment increasing apparatus heater-driven signal when starting.
Fig. 7 B is the sequential chart of fixing device with the first embodiment increasing apparatus increasing apparatus drive signal when starting.
Fig. 7 C is the sequential chart of fixing device with the first embodiment increasing apparatus output current when starting.
Fig. 7 D is the sequential chart of fixing device with the first embodiment increasing apparatus output voltage when starting.
Fig. 8 be the expression second embodiment increasing apparatus brief configuration and with the circuit diagram of the annexation of the electrical storage device and second fixing heater.
Fig. 9 is the process flow diagram that expression has the fixing device startup control system of the second embodiment increasing apparatus.
Figure 10 is the circuit diagram of current path that expression has the fixing device initial start stage of the second embodiment increasing apparatus.
Figure 11 is the circuit diagram that fixing device 7 that expression has second an embodiment increasing apparatus starts the current path in later stages.
Figure 12 A is the sequential chart of fixing device with the second embodiment increasing apparatus heater-driven signal when starting.
Figure 12 B is the sequential chart of fixing device with the second embodiment increasing apparatus by-pass switch drive signal when starting.
Figure 12 C is the sequential chart of fixing device with the second embodiment increasing apparatus output current when starting.
Figure 12 D is the sequential chart of fixing device with the second embodiment increasing apparatus output voltage when starting.
Figure 13 is the brief configuration figure of other embodiments of expression the present invention.
Figure 14 is the brief configuration figure of other embodiments of expression the present invention.
Embodiment
Below, the image processing system to one embodiment of the present invention describes with reference to the accompanying drawings.
Fig. 1 is the side view of schematic representation as the compounding machine inner structure of an example of image processing system of one embodiment of the present invention.Compounding machine 1 has functions such as copy function, printing function, scan function and facsimile function concurrently.The original copy supply unit 6 that this compounding machine 1 has main part 2, is configured in the heap paper disc 3 on main part 2 left sides, is configured in the manuscript reading section 5 on main part 2 tops and is configured in manuscript reading section 5 tops.
In addition, be provided with operating portion 47 in the front portion of compounding machine 1.Have on this operating portion 47: initiating key 471 is used for the user and imports execution printing indication; Figure key 472 is used for input and prints umber etc.; Display part 473 shows the TipWizard information of various duplicating action etc., is made of the LCD of the touch panel function with the various setting usefulness of input etc.; Reset key 474, the setting content that will set in display part 473 etc. is reset; Stop key 475 is used to make executory printing (formation image) action to stop; Function switch key 477 is used to switch copy function, printing function, scan function and facsimile function.
Original copy supply unit 6 comprises: the original copy placement section 61 that is used to place original copy; Original copy discharge portion 62 is used for the original copy after finishing image and reading is discharged; And original copy conveying mechanism 63, by being used for reading the relative position of slit 53 with original copy and to the paper feed roller (figure omits) of original copy discharge portion 62 discharges and transport roller formations such as (omitting among the figure) being placed on to be transported to after more than of original copys on the original copy placement section 61 are extracted out.Original copy conveying mechanism 63 also has paper switching mechanism (omitting among the figure), after the original copy pros and cons upset, carries to reading the relative position of slit 53 with original copy again, can read slit 53 by original copy, reads the two-sided image of original copy by scanner section 51.
In addition, original copy supply unit 6 is arranged to can rotate freely with respect to main part 2, makes its front one side to be moved upward.Move by the front one side direction top that makes original copy supply unit 6, opening wide above the document board 52, the operator can the original copy that reads for example in opened condition books etc. be placed on document board 52 above.
In addition, under situation, after the one side of recording chart forms image, become the state in the roller 463 of transporting that this recording chart is clamped in paper discharge tray 48 1 sides by recording portion 40 at the two-sided formation image of recording chart.Make in this state and transport roller 463 counter-rotatings, recording chart is gone back to, recording chart is delivered in the paper-feeding passage 49, be transported to the upstream region of recording portion 40 again,, after forming image on another face, recording chart is discharged on heap paper disc 3 or the paper discharge tray 48 by recording portion 40.
Fig. 2 is the expression fixing device 7 that has of compounding machine 1 and the sketch of inner structure on every side thereof.Fixing device 7 comprises: first power switch 71, accessory power supply unit 72, fixing roller 73, accessory power supply switch 74 and charge switch 75.
Accessory power supply switch 74 is arranged between the accessory power supply unit 72 and second fixing heater 732, be to whether the electric power from accessory power supply unit 72 being offered second fixing heater 732, just, whether make second fixing heater 732 drive the on-off switch that (generation heat) switches.Accessory power supply switch 74 makes power supply conducting or disconnection from accessory power supply unit 72 according to the switching signal from described control part 10 inputs.
Accessory power supply unit 72 is for to the power supply of second fixing heater 732, is provided with as the accessory power supply of source power supply 8.Accessory power supply unit 72 comprises charging device 721, electrical storage device 722 and increasing apparatus 723.
Electrical storage device (example of the accessory power supply in the claim) 722 has the double charge layer capacitor of a double charge layer capacitor or a plurality of series connection etc.Electrical storage device 722 as electric charge, charges the electric current that comes self charger 721 to double charge layer capacitor, on the other hand the electric charge after the charging in this double charge layer capacitor is discharged, and outputs in the increasing apparatus 723 as discharge current.
723 voltages of exporting from electrical storage device 722 of increasing apparatus (example of the booster circuit in the claim) are as input voltage, and this input voltage risen to the voltage of second fixing heater 732 regulation that is suitable as load, the electric power after again this being boosted offers second fixing heater 732.Increasing apparatus 723 is that transformer by insulated type is the insulated type DC/DC converter of input one side and the insulation of output one side.
Total body action of 10 pairs of compounding machines 1 of control part (control device) is controlled.10 pairs first power switches 71 of control part, accessory power supply switch 74, and charge switch 75 conducting and disconnection separately carry out switching controls.
In addition, on control part 10, be connected with timer 11.These timer 11 giving of process of metering are fixed time.This gives fixing time and is meant that (heating since first fixing heater 731) reaches the time till the state after the reduction to dash current (back narration) imagination that produces when second fixing heater 732 heats beginning, for example, be that imagination reaches the time flow through the rated current state in second fixing heater 732 till.This gives the difference of fixing time according to second fixing heater, 732 performances, is waited by suitably settings such as tests by the fabricator.
Passed through described giving under the situation of fixing time being metered into timer 11, control part 10 drives increasing apparatus 723, and the output that offers second fixing heater 732, switches to the output of this increasing apparatus 723 of stack in the output of electrical storage device 722.
Below, the structure of the first embodiment increasing apparatus 723 is described.Fig. 3 be the expression first embodiment increasing apparatus 723 brief configuration and with the circuit diagram of the annexation of the electrical storage device 722 and second fixing heater 732.
As shown in Figure 3, the increasing apparatus 723 of first embodiment comprises transformer 723a, MOS transistor 723b, PWM controller 723c and smoothing circuit 723d.
Transformer (example of insulated type converter) 723a is the transformer of insulated type, has to make primary coil and the secondary coil that is adapted at producing on second fixing heater 732 turn ratio of necessary voltage.One end of transformer 723a primary coil is connected on the end (positive voltage one side) of electrical storage device 722, and the other end of primary coil is connected in the drain electrode of MOS transistor 723b.In addition, the two ends of transformer 723a secondary coil are connected on the smoothing circuit 723d.
In addition, PWM controller 723c generates pwm signal, makes to reach as the voltage of accessory power supply voltage output from smoothing circuit 723d to give fixed definite value, by this pwm signal being offered the grid of MOS transistor 723b, controls the switch motion of MOS transistor 723b.Like this, even the charging voltage of the double charge layer capacitor of electrical storage device 722 reduces gradually because of discharge, and under the situation that the input voltage of increasing apparatus 723 also reduces, the driving voltage of second fixing heater 732 still remains on definite value, and the heat that second fixing heater 732 is produced is stable.In addition, PWM controller 723c and MOS transistor 723b are examples of the driving switching device shifter in the claim.
Just, accessory power supply unit 72 has the increasing apparatus 723 that makes input one side (an elementary side) and output one side (a secondary side) insulation by transformer 723a.An elementary side of the increasing apparatus 723 of accessory power supply unit 72 is connected on the electrical storage device 722, and on the other hand, a secondary side one end is connected on the electrical storage device 722, and the other end of this secondary side is connected on second fixing heater 732.Like this, the accessory power supply voltage on the power output end of accessory power supply unit 72 is (stack) voltage the output voltage addition of the charging voltage of electrical storage device 722 and increasing apparatus 723.
Below, the control the when fixing device 7 with first embodiment increasing apparatus 723 is started describes.Fig. 4 is the process flow diagram that expression has the fixing device 7 startup control systems of the first embodiment increasing apparatus 723, Fig. 5 is the circuit diagram that is illustrated in the current path of these fixing device 7 initial start stage, Fig. 6 is illustrated in the circuit diagram that this fixing device 7 starts the current path in later stage, and Fig. 7 A to Fig. 7 D is the sequential chart of heater-driven signal, increasing apparatus drive signal, output current and output voltage when this fixing device 7 starts.
Connect the primary power (being "Yes") of compounding machine 1 by operator's operation in S1, control part 10 makes 71 conductings of first power switch, and the electric power from source power supply 8 is offered first fixing heater 731, drives first fixing heater 731 (S2).
In addition, control part 10 makes charge switch 75 disconnect (S3).Then, control part 10 sends to PWM controller 723c to the signal that stops increasing apparatus 723 drivings, and MOS transistor 723b is carried out switch control (S4), makes the electric power from electrical storage device 722 not offer increasing apparatus 723.Just, control part 10 makes increasing apparatus 723 stop to drive, and boost action is stopped.Then, control part 10 is conducting accessory power supply switch 74 again, and the electric power from accessory power supply unit 72 is offered second fixing heater 732 (S5).
Just, shown in Fig. 7 A to Fig. 7 D, when the primary power of compounding machine 1 was connected, control part 10 made first fixing heater 731 drive (Fig. 7 A), but the state (Fig. 7 B) that increasing apparatus 723 is maintained at stop to drive.Therefore, the output of the electrical storage device 722 that boosts from increasing apparatus 723 of no use, offer second fixing heater 732 (Fig. 7 C).In case driven by power second fixing heater 732 that provides from this electrical storage device 722 is provided, then by second fixing heater 732 that becomes low-temperature condition at the driving initial stage is applied voltage, in second fixing heater 732 and increasing apparatus 723, flow through dash current (Fig. 7 C), current path becomes as shown in Figure 5, and this dash current is to flow to second fixing heater 732 by being arranged on diode D2 on the smoothing circuit 723d in the booster circuit 723 and the path of coil L.In this case, coil L flows through the big electric current more than the ratings that forms because of dash current, becomes state of saturation, can not bring into play the function of telefault.
After this, in case be metered into by timer 11 and passed through described giving and fix time that (dash current of imagination arrives the time of reduction state, for example, the time that drops to rated current of imagination) (in S6, be "Yes"), then control part 10 sends to PWM controller 723c to the Continuity signal that increasing apparatus 723 is driven, MOS transistor 723b is carried out switch control (S7), make electric power offer increasing apparatus 723 from electrical storage device 722.Dash current is flowed through during the increasing apparatus 723, the coil L of increasing apparatus 723 becomes state of saturation, can not bring into play the function of telefault, if but dash current reduces, then coil L recovers from state of saturation, can bring into play the function of telefault, so wait for that dash current reduces, coil L recovers from state of saturation, by control part 10 increasing apparatus 723 is driven, carry out boost action.Like this, after dash current reaches the reduction state,, offer second fixing heater 732 resulting voltage on the output voltage that is superimposed upon with the voltage after increasing apparatus 723 liftings from electrical storage device 722.
Just, as shown in Figure 7, reach reduction state (Fig. 7 C) at described dash current, after coil L recovered from state of saturation, control part 10 drove increasing apparatus 723 (Fig. 7 B).Like this, current path as shown in Figure 6, the voltage that comes the electrical storage device 722 after free increasing apparatus 723 boosts is superposeed, output to second fixing heater 732 (Fig. 7 D), in second fixing heater 732 and increasing apparatus 723, flow through rated current (Fig. 7 C).So can bring into play as telefault normal function, can with increasing apparatus 723 normally boost because coil L recovers from state of saturation this moment.
For example, using second fixing heater 732 and having under the situation of full charging voltage (full-charge voltage) as the electrical storage device 722 of the double charge layer capacitor of 40V, using to have the increasing apparatus 723 that the input voltage of 40V is risen to the performance of 75V output with the halogen heater that drives by ratings 75A/26A.At this moment, utilize the characteristic of halogen heater, during low temperature before producing heat, when resistance value is specified about 1/10, so flow through dash current when applying voltage in the early stage near 200A, can not bring into play the function of telefault because of this dash current causes coil L, but by described control, increasing apparatus 723 does not carry out boost action at this moment.Like this, even have the structure of increasing apparatus 723, because can be to 732 power supplies of second fixing heater, so also can shorten the time that the photographic fixing heating system starts from driving initial stage electrical storage device 722.(for example fall the back after rise at dash current, when first fixing heater 731 and second fixing heater 732 drive behind the 100msec), control part 10 makes action that increasing apparatus 723 begins to boost (in Fig. 7 C, expression is the example behind the 500msec when first fixing heater 731 and second fixing heater 732 drive), in increasing apparatus 723, flow through the rated current (for example 26A) that boost action is not produced harm, in addition, superpose by the voltage after this is boosted, can more effectively carry out the startup of photographic fixing heating system.
Below, the structure of the increasing apparatus 723 of second embodiment is described.Fig. 8 be expression increasing apparatus 723 brief configuration and with the circuit diagram of the annexation of the electrical storage device 722 and second fixing heater 732.In addition, omitted to the explanation of the described first embodiment same structure.
As shown in Figure 8, the increasing apparatus 723 of second embodiment also has by-pass switch (bypass switching mechanism) 723e except having transformer 723a, MOS transistor 723b, PWM controller 723c and smoothing circuit 723d.
By-pass switch 723e offers the switching mechanism that second fixing heater 732 switches to the electric power from electrical storage device 722 to whether making increasing apparatus 723 bypasses.As shown in Figure 8, by-pass switch 723e is connected by short circuit with position with respect to " part that is connected with electrical storage device 722 (accessory power supply connecting portion) " more close transformer 723a with respect to the position of " part (fixing heater connecting portion) that is connected with second fixing heater 732 " more close transformer 723a in a secondary side of increasing apparatus 723.Therefore, by-pass switch 723e can make increasing apparatus 723 be in by under the state of bypass, and the electric power from electrical storage device 722 is offered second fixing heater 732.
Below, the control the when fixing device 7 with second embodiment increasing apparatus 723 is started describes.Fig. 9 is the process flow diagram that expression has the fixing device 7 startup control systems of the second embodiment increasing apparatus 723, Figure 10 is the circuit diagram that is illustrated in the current path of these fixing device 7 initial start stage, Figure 11 is illustrated in the circuit diagram that this fixing device 7 starts the current path in later stage, the sequential chart of heater-driven signal, by-pass switch drive signal, output current and output voltage when Figure 12 A to Figure 12 D is these fixing device 7 startups.
Make in operation under the situation (in S21, being "Yes") of the primary power connection of compounding machine 1 by the operator, control part 10 makes 71 conductings of first power switch, electric power from source power supply 8 is offered first fixing heater 731, drive first fixing heater 731 (S22), and turn off charge switch 75 (S23).At this moment, control part 10 switches by-pass switch 723e, makes by-pass switch 723e conducting, and increasing apparatus 723 is in by the state of bypass, makes the electric power from electrical storage device 722 offer second fixing heater 732 (S24).Have, control part 10 makes 74 conductings of accessory power supply switch again, and the electric power from accessory power supply unit 72 is offered second fixing heater 732 (S25).
Just shown in Figure 12 A to Figure 12 D, when the primary power of compounding machine 1 is connected, control part 10 makes first fixing heater 731 drive (Figure 12 A), by-pass switch 723e conducting (Figure 12 B), the output from electrical storage device 722 that increasing apparatus 723 of no use is boosted offers second fixing heater 732 (Figure 12 D).In case driven by power second fixing heater 732 that provides from this electrical storage device 722 is provided, then by applying voltage to second fixing heater 732 that becomes low-temperature condition at the driving initial stage, in second fixing heater 732, flow through dash current (Figure 12 C), current path as shown in figure 10, increasing apparatus 723 is in by the state of bypass, to cross second fixing heater 732 by the path flow of by-pass switch 723e.In this case, the big electric current that does not flow through in coil L more than the ratings is a dash current, and coil L does not become state of saturation, so do not bear load on coil L.
After this, in case be metered into timer 11 and passed through described giving and fix time that (dash current of imagination reaches the time of reduction state, for example, the time that drops to rated current of imagination) (in S26, be "Yes"), control part 10 switches by-pass switch 723e, by-pass switch 723e is disconnected (S27), will boost with increasing apparatus 723 from the electric power of electrical storage device 722.Have, control part 10 sends to PWM controller 723c to the Continuity signal that increasing apparatus 723 is driven, and MOS transistor 723b is carried out switch control (S28), and the electric power from electrical storage device 722 is offered increasing apparatus 723 again.Just, control part 10 makes increasing apparatus 723 carry out boost action.Like this, after dash current reaches the reduction state, the voltage after boosting with increasing apparatus 723 is superimposed upon resulting voltage on the output voltage from electrical storage device 722, offers second fixing heater 732.
Just shown in Figure 12 A to Figure 12 D, when control part 10 reaches the reduction state at described dash current (Figure 12 C), by-pass switch 723e is disconnected (Figure 12 B).Like this, current path becomes as shown in figure 11, output to second fixing heater 732 (Figure 12 D) after the voltage from electrical storage device 722 after boosting with increasing apparatus 723 superposeed, at this moment, increasing apparatus 723 is not owing to being subjected to the influence of dash current, so flow through rated current (Figure 12 C) in second fixing heater 732 and increasing apparatus 723.Coil L is not subjected to the influence of dash current, has the normal function of telefault, can boost normally with increasing apparatus 723.
For example, using second fixing heater 732 and having under the situation of full charging voltage as the electrical storage device 722 of the double charge layer capacitor of 40V, using to have the increasing apparatus 723 that the input voltage of 40V is risen to the performance of exporting behind the 75V with the halogen heater that drives by ratings 75A/26A.At this moment, utilize the characteristic of halogen heater, because the low temperature period before producing heat, when resistance value is ratings about 1/10, so when applying voltage in the early stage, flow through dash current, but by described Bypass Control near 200A, make dash current can not flow through increasing apparatus 723, in increasing apparatus 723, can not produce the harm that dash current causes.Like this, even have the structure of increasing apparatus 723, also can just begin the electric power of electrical storage device 722 is offered second fixing heater 732, so can shorten the start-up time of photographic fixing heating system from the driving initial stage.Control part 10 (for example falls the back after rise at dash current, when first fixing heater 731 and second fixing heater 732 drive behind the 100msec), the boost action that beginning is undertaken by increasing apparatus 723 (example when expression is since first fixing heater 731 and 732 drivings of second fixing heater in Figure 12 C behind the 500msec), in increasing apparatus 723, flow through the rated current (for example 26A) that boost action is not produced harm, in addition, superpose by the voltage after this is boosted, can more effectively carry out the startup of photographic fixing heating system.
In described processing shown in Figure 9, what illustrate is that control part 10 makes by-pass switch 723e disconnect back (S27), just drive increasing apparatus 723 (S28), but control part 10 then need not be managed the time that drives increasing apparatus 723 if after making by-pass switch 723e conducting (S24).
In addition, the present invention is not the content that is defined in described embodiment, can also adopt following mode.
(A) for example, in described each embodiment, control part 10 gives under the situation of fixing time being metered into timer 11 to have passed through, [a] begins the boost action of carrying out with increasing apparatus 723, perhaps, after [b] switches by-pass switch 723e, begin the boost action of carrying out with increasing apparatus 723, but also can be as shown in figure 13, substitute timer 11, galvanometer (current sensing means) 91 is connected between the accessory power supply unit 72 and second fixing heater 732, control part 10 represents that value that dash current reaches the reduction state (for example detecting with galvanometer 91, be lower than the value of load current value) situation under, coil L recovers from state of saturation, [a] sends to PWM controller 723c to the Continuity signal that increasing apparatus 723 is driven, MOS transistor 723b is carried out switch control, electric power from electrical storage device 722 is offered increasing apparatus 723 (just, carry out this processing illustrated in fig. 13, the S6 of alternate figures 4), perhaps [b] switches by-pass switch 723e, begin to carry out the boost action (just, carrying out this processing illustrated in fig. 13, the S26 of alternate figures 9) of increasing apparatus 723.In this case, control part 10 carries out the drive controlling of increasing apparatus 723, so can judge the time of flowing through dash current in increasing apparatus 723 accurately according to galvanometer 91 detected current values, thereby can avoid dash current reliably, drive increasing apparatus 723.
(B) have again as shown in figure 14, substitute timer 11, near the temperature-detecting device (temperature-detecting device) 92 of configuration detection second fixing heater 732 temperature second fixing heater 732, for example dispose thermometer, control part 10 represents that dash current reaches under the situation of temperature of reduction state detecting with temperature-detecting device 92, coil L recovers from state of saturation, [c] sends to PWM controller 723c to the Continuity signal that increasing apparatus 723 is driven, MOS transistor 723b is carried out switch control, electric power from electrical storage device 722 is offered increasing apparatus 723 (just, carry out this processing illustrated in fig. 14, replace the S6 of Fig. 4), perhaps [d] switches by-pass switch 723e, begins the boost action of carrying out with increasing apparatus 723 (just, carry out this processing illustrated in fig. 14, replace the S26 of Fig. 9).In this case, control part 10 carries out the drive controlling of increasing apparatus 723 according to temperature-detecting device 92 detected temperature, so can enough simple processing judge the time of flowing through dash current in increasing apparatus 723.
(C) in addition, in described each embodiment, all adopted transformer 723a in increasing apparatus 723, but be not limited thereto, the insulated type DC/DC converter of use and transformer different insulative method also goes for increasing apparatus 723.
In addition, it is compounding machine 1 that image processing system of the present invention is not limited to, and also can be other image processing systems, and described Fig. 1 only is an embodiment of the invention to structure shown in Figure 13 and processing, and structure of the present invention and processing are not limited thereto.
As mentioned above, the image processing system that the present invention relates to comprises: accessory power supply has capacitor; Fixing heater, use from power-actuated first fixing heater of external power source and have halogen heater and the photographic fixing portion of toner fixing on recording chart being heated, having by power-actuated second fixing heater from described accessory power supply; Booster circuit, by the insulated type converter after promoting from the output voltage of described accessory power supply, output to described second fixing heater, the elementary side of described insulated type converter is connected on the described accessory power supply, and an end of a secondary side is connected on described second fixing heater, and the other end is connected on the described accessory power supply; And control device, control is to the power supply of described fixing heater, wherein, one end of described second fixing heater is connected a secondary side of described booster circuit, the other end is connected on the described accessory power supply, described control device is at the driving initial stage of described fixing heater, use electric power that described first fixing heater is driven from described external power source, and do not superpose from the output of described booster circuit, only use electric power that described second fixing heater is driven from described accessory power supply, after during flowing through described second fixing heater through dash current, output from this booster circuit is superimposed upon in the output of described accessory power supply, again the output after this stack is offered described second fixing heater.
According to this formation (1), control device was used the output from external power source to drive first fixing heater, and is not superposeed from the output of booster circuit at the driving initial stage of fixing heater, only used the output from accessory power supply to drive second fixing heater.Like this, even flow through dash current during, in booster circuit, can not produce the harm that causes by dash current yet, can power to second fixing heater from accessory power supply, thus can shorten make fixing roller arrive can photographic fixing the temperature time necessary.
In described formation (1), preferably, also comprise the driving switching device shifter, to the driving of described booster circuit or stop to drive and switch, described control device is at the driving initial stage of described fixing heater, use electric power that described first fixing heater is driven from described external power source, and stopping to drive under the state of described booster circuit by described driving switching device shifter, only use electric power that described second fixing heater is driven from described accessory power supply, after during flowing through described second fixing heater through dash current, by described driving switching device shifter described booster circuit is driven, output from this booster circuit is superimposed upon in the output of described accessory power supply, again the output after this stack is offered described second fixing heater.
According to this formation (2), from accessory power supply when second fixing heater is powered, even during dash current flows through booster circuit, also can offer second fixing heater to the electric power of accessory power supply, so can shorten be used to make fixing roller to reach can the fixing temperature time necessary.
In addition, in described formation (1), in addition preferably, also comprise: the bypass switching device shifter, in the time will offering described second fixing heater from the electric power of described accessory power supply, output from this accessory power supply is switched by the state of bypass through the state of described booster circuit (and not by bypass) or without this booster circuit, wherein, described control device is at the driving initial stage of described fixing heater, use output that described first fixing heater is driven from described external power source, and make by described bypass switching device shifter described booster circuit by the state of bypass under, only use output that described second fixing heater is driven from described accessory power supply, after during flowing through described second fixing heater through dash current, switch to by described bypass switching device shifter and to make described booster circuit not by the state of bypass, and the output of this booster circuit is superimposed upon in the output of described accessory power supply, again the output after this stack is offered described second fixing heater.
In this formation (3), preferably, described bypass switching device shifter is in a secondary side of described booster circuit, be connected by short circuit with position with respect to the position of more close described converter one side of described fixing heater connecting portion with respect to more close described converter one side of described accessory power supply connecting portion, so that described booster circuit by under the state of bypass, can offer described second fixing heater to the output of described accessory power supply.
According to these inventions, even during flowing through dash current, in booster circuit, can not produce the harm that causes because of dash current yet, can power to second fixing heater from accessory power supply, thus can shorten be used to make fixing roller reach can photographic fixing the temperature time necessary.
In addition, in described formation (2) or (3), preferably, described insulated type converter is the insulated type transformer.
In described formation (2) or (3), in addition preferably, also comprise: the timer of metering time, wherein, described control device has passed through described dash current and has reached under the situation that giving of reduction state fix time being metered into by described timer, described bypass switching device shifter is switched, the output from this booster circuit is superimposed upon in the output of described accessory power supply, again the output after this stack is offered described second fixing heater.
According to this invention since the time that dash current reaches the reduction state fix time to determine by giving of being metered into of timer, so can judge that dash current flows through the time of booster circuit by simple processing.
In described formation (2) or (3), in addition preferably, also comprise: current sensing means, the current value that detection is flow through in described second fixing heater, wherein, described control device reaches under the situation of value of reduction state being detected the described dash current of expression by described current sensing means, described bypass switching device shifter is switched, the output of described booster circuit is superimposed upon in the output of described accessory power supply, again the output after this stack is offered described second fixing heater.
According to this invention, because reaching the time of reduction state, dash current determines, so can judge accurately that dash current flows through the time of booster circuit by the value that current sensing means detects expression dash current reduction state.
In described formation (2) or (3), in addition preferably, also comprise: temperature-detecting device, detect the described second fixing heater temperature, wherein, described control device reaches under the situation of temperature of reduction state being detected the described dash current of expression by described temperature-detecting device, and described bypass switching device shifter is switched, the output of described booster circuit is superimposed upon in the output of described accessory power supply, again the output after this stack is offered described second fixing heater.
According to this invention, because reaching the time of reduction state, dash current determines, so can judge that dash current flows through the time of booster circuit with simple processing by the temperature that the detected expression dash current of temperature-detecting device reaches the reduction state.
Claims (8)
1. image processing system is characterized in that comprising:
Accessory power supply has capacitor;
Fixing heater, use from power-actuated first fixing heater of external power source and have halogen heater and the photographic fixing portion of toner fixing on recording chart being heated, having by power-actuated second fixing heater from described accessory power supply;
Booster circuit, by the insulated type converter after promoting from the output voltage of described accessory power supply, output to described second fixing heater, the elementary side of described insulated type converter is connected on the described accessory power supply, and an end of a secondary side is connected on described second fixing heater, and the other end is connected on the described accessory power supply;
And control device, control power supply to described fixing heater,
Wherein, an end of described second fixing heater is connected a secondary side of described booster circuit, and the other end is connected on the described accessory power supply,
Described control device is at the driving initial stage of described fixing heater, use electric power that described first fixing heater is driven from described external power source, and do not superpose from the output of described booster circuit, only use electric power that described second fixing heater is driven from described accessory power supply, after during flowing through described second fixing heater through dash current, output from this booster circuit is superimposed upon in the output of described accessory power supply, again the output after this stack is offered described second fixing heater.
2. image processing system according to claim 1 is characterized in that also comprising:
Drive switching device shifter, to the driving of described booster circuit or stop to drive and switch,
Wherein, described control device is at the driving initial stage of described fixing heater, use electric power that described first fixing heater is driven from described external power source, and under the state that makes described booster circuit stop to drive by described driving switching device shifter, only use electric power that described second fixing heater is driven from described accessory power supply, after during flowing through described second fixing heater through dash current, by described driving switching device shifter described booster circuit is driven, output from this booster circuit is superimposed upon in the output of described accessory power supply, again the output after this stack is offered described second fixing heater.
3. image processing system according to claim 1 is characterized in that also comprising:
The bypass switching device shifter in the time will offering described second fixing heater from the electric power of described accessory power supply, is switched by the state of bypass through the state of described booster circuit or without this booster circuit the output from this accessory power supply,
Wherein, described control device is at the driving initial stage of described fixing heater, use output that described first fixing heater is driven from described external power source, and make by described bypass switching device shifter described booster circuit by the state of bypass under, only use output that described second fixing heater is driven from described accessory power supply, after during flowing through described second fixing heater through dash current, switch to by described bypass switching device shifter and to make described booster circuit not by the state of bypass, and the output of this booster circuit is superimposed upon in the output of described accessory power supply, again the output after this stack is offered described second fixing heater.
4. image processing system according to claim 3 is characterized in that,
Described bypass switching device shifter is in a secondary side of described booster circuit, be connected by short circuit with position with respect to the position of more close described converter one side of described fixing heater connecting portion with respect to more close described converter one side of described accessory power supply connecting portion, so that described booster circuit by under the state of bypass, can offer described second fixing heater to the output of described accessory power supply.
5. according to claim 2 or 3 described image processing systems, it is characterized in that described insulated type converter is the insulated type transformer.
6. according to claim 2 or 3 described image processing systems, it is characterized in that also comprising: the timer of metering time,
Wherein, described control device has passed through described dash current and has reached under the situation that giving of reduction state fix time being metered into by described timer, described bypass switching device shifter is switched, output from this booster circuit is superimposed upon in the output of described accessory power supply, again the output after this stack is offered described second fixing heater.
7. according to claim 2 or 3 described image processing systems, it is characterized in that also comprising:
Current sensing means detects the current value that flows through in described second fixing heater,
Wherein, described control device reaches under the situation of value of reduction state being detected the described dash current of expression by described current sensing means, described bypass switching device shifter is switched, the output of described booster circuit is superimposed upon in the output of described accessory power supply, again the output after this stack is offered described second fixing heater.
8. according to claim 2 or 3 described image processing systems, it is characterized in that also comprising:
Temperature-detecting device detects the described second fixing heater temperature,
Wherein, described control device reaches under the situation of temperature of reduction state being detected the described dash current of expression by described temperature-detecting device, described bypass switching device shifter is switched, the output of described booster circuit is superimposed upon in the output of described accessory power supply, again the output after this stack is offered described second fixing heater.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006-213812 | 2006-08-04 | ||
| JP2006213812A JP4828349B2 (en) | 2006-08-04 | 2006-08-04 | Image forming apparatus |
| JP2006213812 | 2006-08-04 | ||
| JP2006218684A JP4949769B2 (en) | 2006-08-10 | 2006-08-10 | Image forming apparatus |
| JP2006-218684 | 2006-08-10 | ||
| JP2006218684 | 2006-08-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101118408A true CN101118408A (en) | 2008-02-06 |
| CN101118408B CN101118408B (en) | 2010-06-02 |
Family
ID=39054559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101376958A Expired - Fee Related CN101118408B (en) | 2006-08-04 | 2007-08-02 | Image forming device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4828349B2 (en) |
| CN (1) | CN101118408B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104253534A (en) * | 2013-06-26 | 2014-12-31 | 杨泰和 | Boost type direct current output control circuit device controlled by subpower |
| CN104284039A (en) * | 2013-07-03 | 2015-01-14 | 三星电子株式会社 | Image forming apparatus and method of supplying power thereof |
| CN106886139A (en) * | 2015-12-16 | 2017-06-23 | 柯尼卡美能达株式会社 | Possesses the image processing system of the fixation unit including strip heater |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7350538B2 (en) * | 2019-06-29 | 2023-09-26 | キヤノン株式会社 | Image forming device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3888074B2 (en) * | 2001-03-21 | 2007-02-28 | スズキ株式会社 | Power generator |
| JP4417611B2 (en) * | 2001-05-30 | 2010-02-17 | 株式会社リコー | Fixing device |
| KR100575071B1 (en) * | 2002-02-04 | 2006-05-03 | 가부시키가이샤 리코 | Heating apparatus, fixing apparatus, and image forming apparatus |
| JP2004144999A (en) * | 2002-10-24 | 2004-05-20 | Ricoh Co Ltd | Image forming apparatus |
| JP2004191523A (en) * | 2002-12-10 | 2004-07-08 | Ricoh Co Ltd | Image forming apparatus |
| JP4468708B2 (en) * | 2004-01-16 | 2010-05-26 | 三菱電機株式会社 | Power supply |
| JP2005235652A (en) * | 2004-02-20 | 2005-09-02 | Ricoh Co Ltd | Heating device, fixing device, and image forming device |
-
2006
- 2006-08-04 JP JP2006213812A patent/JP4828349B2/en not_active Expired - Fee Related
-
2007
- 2007-08-02 CN CN2007101376958A patent/CN101118408B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104253534A (en) * | 2013-06-26 | 2014-12-31 | 杨泰和 | Boost type direct current output control circuit device controlled by subpower |
| CN104284039A (en) * | 2013-07-03 | 2015-01-14 | 三星电子株式会社 | Image forming apparatus and method of supplying power thereof |
| CN106886139A (en) * | 2015-12-16 | 2017-06-23 | 柯尼卡美能达株式会社 | Possesses the image processing system of the fixation unit including strip heater |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2008040117A (en) | 2008-02-21 |
| CN101118408B (en) | 2010-06-02 |
| JP4828349B2 (en) | 2011-11-30 |
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