CN1360231A - Melting roll device for electrofax image forming device - Google Patents
Melting roll device for electrofax image forming device Download PDFInfo
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- CN1360231A CN1360231A CN 01137402 CN01137402A CN1360231A CN 1360231 A CN1360231 A CN 1360231A CN 01137402 CN01137402 CN 01137402 CN 01137402 A CN01137402 A CN 01137402A CN 1360231 A CN1360231 A CN 1360231A
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- roll device
- fusing roller
- heating element
- melting roll
- melting
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/0095—Heating devices in the form of rollers
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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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- General Physics & Mathematics (AREA)
- Fixing For Electrophotography (AREA)
- Control Of Resistance Heating (AREA)
- Rolls And Other Rotary Bodies (AREA)
Abstract
A structurally improved fusing roller assembly based on the heat pipe principle is provided. The fusing roller assembly includes a fusing roller having the structure of a heat pipe, and a resistance heater and/or a halogen lamp inside the fusing roller, so that the surface of fusing roller can be instantaneously heated up to a target fusing temperature. By containing a working fluid inside the fusing roller and in contact with the resistance heater the fusing roller assembly can be heated up to a target fusing temperature within a shorter period of time without need for warm-up and stand-by period, so that power consumption decreases.
Description
Technical field
The present invention relates to a kind of melting roll device that is used for the electric photography image processing system, more particularly, relate to a kind of be used for the electric photography image processing system can be at the melting roll device of instantaneous heating under the low power consumption.
Background technology
At common electrical photography image processing system, in duplicating machine and laser printer,, be coated in the lip-deep photochromics of photoreceptor roller by uniform charging along with the electrostatic charging roller near the photoreceptor roller rotates.Photochromics after the charging is exposed to from laser scanning device (LSU) in laser beam scanned, and the electrostatic latent image of therefore default pattern is formed on the photochromics.Developing apparatus provides toner to photochromics, becomes visual toner image with the latent electrostatic image developing that will be formed on the photochromics.Default transfer voltage imposes on transferring roller, and this transferring roller contacts with the photoreceptor roller with default external force when photoreceptor roller carrying toner image.Under this state, along with the gap between copy paper input transferring roller and the photoreceptor medium, the toner image that is formed on the photochromics is transferred on the copy paper.Comprise that the instantaneous heating of the fixing device that melts roller shifted the copy paper of toner image, with the toner image fusing and be fixed on the copy paper.Usually, Halogen lamp LED is as the thermal source of fixing device.Halogen lamp LED is arranged on fusing roller inside, and reaches target temperature with radiation heat heat fused roller surface.
In the traditional melting roll device that utilizes Halogen lamp LED as the electric photography image processing system of thermal source, the outside surface of fusing roller must produce heat; Therefore the fusing roller is heated from inside to outside by the radiation heat from Halogen lamp LED.Pressure roll is positioned at below the fusing roller.Along with the paper of the toner image of carrying powder type through between fusing roller and the pressure roll time, paper is by pre set force hot pressing, and toner image is by from the heat and the power fusing of fusing roller and pressure roll and be fixed on the copy paper.
Thermistor can be used to detect the surface temperature of fusing roller and convert it into electric signal, and the power supply that thermostat can be used for cutting off Halogen lamp LED is supplied with.
Adopt Halogen lamp LED not need a large amount of electric energy, but when image processing system is connected in order to image formation, need quite long preheating time as traditional melting roll device of thermal source.In other words, after electric energy was supplied with, what following was for example to continue tens seconds standby periods to a few minutes, reaches target temperature up to the temperature that melts roller.We have found that, for traditional melting roll device, because the fusing roller is by the radiation heat heating from thermal source, so pyroconductivity is lower.Particularly, for because of contact the adjustment delay that the heating roller temperature that causes reduces the temperature variation that produces with copy paper, therefore be difficult to evenly control the Temperature Distribution of fusing roll shaft to length.Even be in printer operation under the standby mode of time-out execution, periodically supply of electrical energy causes unnecessary power consumption thus to keep the fusing roll temperature constant.In addition, need expend the plenty of time to convert standby mode to operator scheme to carry out image output, formed like this image can not be exported fast.
Another kind design for traditional melting roll device is utilize the heating plate that is placed in the flexible cylinder film tube bottom, and pressure roll to be installed in the heating plate below.Film tube is rotated by independent whirligig and the part spot heating between heating plate and pressure roll and being out of shape.Although it is being favourable aspect low power consumption that this method with heating plate spot heating film tube is considered to, it is not suitable for flying print.
Following patent disclosure the melting roll device of heat pipe: Japanese patent application 58-163836 (September 16 nineteen eighty-three) is equipped with; 3-107438 (on May 13rd, 1991), 3-136478 (on June 7th, 1991); 5-135656 (on June 7th, 1993); 6-296633 (on November 30th, 1994); 6-316435 (on Dec 20th, 1994); 7-65878 (March 24 nineteen ninety-five); 7-105780 (April 28 nineteen ninety-five); 7-244029 (September 22 nineteen ninety-five); 8-110712 (on May 1st, 1996); 10-27202 (on February 9th, 1998); 10-84137 (on March 30th, 1998); And 10-208635 (on July 8th, 1998).
These use the melting roll device of heat pipe to have been reduced power consumption thus by instantaneous heating.Melting roll device still has the short-term delay when conversion between standby operation and printing.Particularly, Japanese patent application 5-135656; 10-84137; 6-29663; Disclosed melting roll device has adopted the dissimilar thermals source that are arranged on beyond the photographic fixing zone at fusing roller one end among the 10-208635.For in these melting roll devices each, thermal source setting has increased the volume of melting roll device and has needed complicated structure.Therefore, need to improve this melting roll device structural complexity.
At Japanese patent application 58-163836; 3-107438; 3-136478; 6-316435; 7-65878; 7-105780; And the thermal source of disclosed melting roll device is arranged in the fusing roller among the 7-244029, therefore because the volume that above-mentioned these devices increase still has problem.Yet each fusing roller is provided with a plurality of regional heat pipes, makes that thus the manufacturing of melting roll device and production are complicated.In addition, the configuration of the regionality of heat pipe causes the temperature deviation between heat pipe contact portion and the heat pipe noncontact part.
Summary of the invention
For these and other problem in the technical solution field, an object of the present invention is to provide a kind of electric photography image processing system and method.
Another purpose provides a kind of improved fusing roller and melting method.
Another purpose provides the melting roll device that is used for the electric photography image processing system, and the regional temperature deviation that wherein melts roller sharply reduces, and has improved overall heat distribution characteristic thus.
Another object of the present invention provides the melting roll device that is used for the electric photography image processing system, and it is easy to make and be designed so that any possible increase minimum of melting roll device size.
Another purpose provides a kind of fusing roller that can proceed to its print state in the short period section from its holding state.
Also having a purpose is to provide more energy to make the electric photography method and apparatus more effective to the electric photography method and apparatus.
In order to realize these and other objects of the present invention, melting method and melting roll device are provided in first embodiment, this device can be presented as to have the cylindrical fusing roller that two ends all seal; The internal cavities of fusing roller is evacuated and is reduced to preset pressure level.The internal cavities of fusing roller contains the working fluid of scheduled volume; Heating element is arranged in the fusing roller and contacts with working fluid.
Among second embodiment, melting method and melting roll device can be presented as to have the cylindrical fusing roller that axial opposite end all seals, and the internal cavities of fusing roller is evacuated and is reduced to preset pressure level.Fusing roller internal cavities contains the working fluid of scheduled volume.Baffle plate will melt the roller inner space and be separated into a plurality of unit spaces.The heating element that is placed in the fusing roller contacts round baffle plate and with working fluid.
For the melting roll device that first or second embodiment structure according to the present invention forms, preferably, heating element is configured to the spiral coil of stratie, and two lead-in wires of resistance heating coil all extend out from the fusing roller by the axial opposite end of fusing roller.Preferably, heating element directly contacts along fusing roller inside surface spiral setting and with this inside surface.In order to strengthen the contact force of heating element to fusing roller inwall, preferably, the external diameter of heating element is greater than the internal diameter of fusing roller internal cavities, so heating element is against fusing roller inner periphery by elastic compression under the effect of the power that causes because of the diameter difference.Preferred fusing roller is formed by copper (Cu) or stainless steel.If the fusing roller is formed by copper, then preferred distilled water is as working fluid.The heating medium amount of liquid phase is contained in the liquid phase working fluid of fusing in the roller and can be the amount of the volume 5-50% scope of fusing roller inner cylinder cavity in other words, is preferably the volumetric quantity of 10-15% scope.
For the melting roll device among the 3rd embodiment, preferred shutter configuration has a plurality of separators that radially are provided with.
Second embodiment at the melting roll device of constructed in accordance with the principles, melting roll device can be configured with cylindrical fusing roller, this cylindrical fusing roller comprises outer tube with first diameter and has interior pipe less than second diameter of first diameter, and interior pipe is coaxial, and to be arranged on outer tube inner and form annular space between outer tube and interior pipe.The annular space of fusing roller is evacuated and is reduced to preset pressure.Working fluid less than the predetermined amount of the annular space volume that forms between outer tube and the interior pipe is contained in the annular space of fusing roller.Well heater is installed in the inside or annular space of interior pipe.
For the melting roll device among the 3rd embodiment, preferably heating element is configured with and is arranged on the primary heater in the annular space or/and manage inner secondary heater in being arranged on.Preferably, primary heater is the spiral resistance heating coil, and secondary heater is a Halogen lamp LED.For the melting roll device of the 3rd embodiment, preferably, shutter configuration has a plurality of separators that radially are provided with.Still for preferably, a plurality of baffle plates are separated into a plurality of unit spaces with annular space.According to principle of the present invention, the melting roll device of constructing as third embodiment of the invention can change, and is combined with one or more architectural features of the melting roll device of first and second embodiment.
Description of drawings
Describe the preferred embodiments of the present invention in detail by the reference accompanying drawing, it is more apparent that above-mentioned purpose of the present invention and advantage will become.
Fig. 1 is a common electrical photography image processing system;
Fig. 2 is the cut-open view of traditional melting roll device of electric photography image processing system;
Fig. 3 shows the structure of the fixing device of the electric photography image processing system that combines traditional melting roll device;
Fig. 4 shows the structure of the fixing device of the electric photography image processing system that combines different traditional melting roll devices;
Fig. 5 is the cut-open view of fixing device of electric photography image processing system that combines melting roll device first embodiment of constructed in accordance with the principles;
Fig. 6 is the fragmentary, perspective view of melting roll device structure shown in Figure 5;
Fig. 6 A is the sectional view of the partly cut-away of heating resistor coil shown in Figure 6;
Fig. 6 B, 6C and 6D show the order of steps of constructed in accordance with the principles melting roll device;
Fig. 7 shows the cut-open view of the melting roll device inner structure shown in Fig. 5 and 6;
Fig. 8 A is the cut-open view of melting roll device second embodiment of constructed in accordance with the principles;
Fig. 8 B is the local longitudinal sectional view of the melting roll device shown in Fig. 8 A;
Fig. 9 A is the cut-open view of melting roll device traditional structure;
Fig. 9 B is the local longitudinal sectional view of the melting roll device shown in Fig. 9 A;
Figure 10 A is the cut-open view of melting roll device the 3rd embodiment of constructed in accordance with the principles;
Figure 10 B is the local longitudinal sectional view of the melting roll device shown in Figure 10 A;
Figure 10 C is two coordinate diagram that contrast between two traditional structures of explanation and the one embodiment of the invention;
Figure 11 A is the cut-open view of melting roll device the 4th embodiment of constructed in accordance with the principles;
Figure 11 B is the local longitudinal sectional view of melting roll device shown in Figure 11 A;
Figure 12 is the fragmentary, perspective view of melting roll device the 5th embodiment in accordance with the principles of the present invention;
Figure 13 is the fragmentary, perspective view of melting roll device the 6th embodiment of constructed in accordance with the principles;
Figure 14 is the longitudinal sectional view that the electronic image that combines melting roll device constructed according to the invention forms the fixing device of device;
Figure 15 is the phase transformation figure of the working fluid that illustrates as increase in temperature and the function of heat pipe working time of explanation;
Figure 16 illustrates heat pipe and underlined heat conducting inner structure with expression liquid phase-gas phase change;
Figure 17 illustrates the curve map that the saturation pressure as the function of saturation temperature of the FC-40 that is used separately as working fluid and distilled water changes;
Figure 18 is the curve map that the final tensile strength as the temperature variation function for aluminium, copper and 304 stainless heat resistant materials changes;
Figure 19 A and 19B are the curve maps that explanation changes with respect to the maximum allowable stress on the heat pipe wall of temperature variation and maximum stress when FC-40 and distilled water are used separately as working fluid;
Figure 20 A and 20B are the curve maps that maximum stress that explanation changes with respect to heat pipe thickness (T) when FC-40 and distilled water are used separately as working fluid changes;
Figure 21 and 22 is that explanation is melted the temperature changing curve diagram of roller middle part with respect to the time for above-mentioned melting roll device first embodiment.
Embodiment
Fig. 1 shows common electric photography image processing system, and the electric photography image processing system comprises: row's paper device 1, key plate 2, control panel lid 3, upper cover plate are opened button 4, paper indication window 5, multi-functional paper feed pallet 6, carton 7, backup cartridge 8 and auxiliary paper support 9.
Fig. 2 is the cut-open view of traditional melting roll device of electric photography image processing system, and it uses Halogen lamp LED as thermal source.Fig. 3 is the cut-open view of fusing roller among Fig. 2, and wherein Halogen lamp LED is as thermal source, and pressure roll, be used in traditional electrical photography image processing system in the same.With reference to Fig. 2, traditional melting roll device 10 comprises cylindrical fusing roller 11 and the heating element 12 in fusing roller 11, such as Halogen lamp LED.Because the outside surface of fusing roller 11 must produce heat, so fusing roller 11 heats by the radiation heat from heating element 12 from inside to outside.
With reference to Fig. 3, pressure roll 13 is positioned at fusing roller 11 belows, and pressure roll 13 has the coating 11a that is formed by teflon.Pressure roll 13 is subjected to the elastic bearing of spring assembly 13a, will press to fusing roller 11 by the paper 14 between fusing roller 11 and the pressure roller 13 by predetermined force.When copy paper 14 is melting between roller 11 and the pressure roll 13 with powder type carrying toner image 14a, copy paper 14 scheduled power hot pressing.In other words, toner image 14a is by from the heat and the external force fusing of fusing roller 11 and pressure roll 13 and be fixed on the copy paper 14.
Thermistor 15 is used to detect the surface temperature of fusing roller 11 and this surface temperature is changed into electric signal, is used to cut off the thermostat of supplying with such as the electric energy of the heating element 12 of Halogen lamp LED 16 is arranged near the fusing roller 11.When the surface temperature of fusing roller 11 surpassed given critical value, thermostat 16 was truncated to the power supply of heating element 12.Thermistor 15 detects the surface temperature of fusing roller 11 and testing result is sent to the controller (not shown) of printer.Controller is controlled according to the surface temperature of detected fusing roller 11 electric energy of the Halogen lamp LED of heating element 12 is supplied with, so that surface temperature is remained on given range.Thermostat 16 plays the fusing roller 11 and the heat protective effect of element on every side, when thermistor 15 and controller can not be controlled the temperature that melts roller 11, and thermostat work.
Utilize Halogen lamp LED needn't consume a large amount of electric energy, but when image processing system is connected with the formation image, need the quite long heating-up time as traditional melting roll device of thermal source.In other words, after electric energy is supplied with, then have stand-by time for example tens seconds to a few minutes, reach target temperature up to the temperature of fusing roller 11.For traditional melting roll device, because the fusing roller is by the radiation heat heating from thermal source, so the coefficient of overall heat transmission is lower.Particularly, reduce the temperature variation corrective delay that produces because of contact the heat roller temperature that causes with copy paper, thereby be difficult to control equably the Temperature Distribution of fusing roller 11.Even suspend in printer operation under the standby mode of execution, electric energy must periodically be provided, to keep the fusing roll temperature constant, cause unnecessary power consumption thus.In addition, need expend the plenty of time to convert standby mode to operator scheme to carry out image output, formed like this image can not be exported fast.
Fig. 4 is the cut-open view that applies to traditional melting roll device of electric photography image processing system.Heating plate 22 is placed in the bottom of flexible cylindrical film pipe 21, and pressure roll 23 is installed in heating plate 22 belows.Film tube 21 is by independent rotating mechanism rotation and spot heating and the distortion of the part between heating plate 22 and pressure roll 23.Method by heating plate 22 spot heating film tubes 21 is being favourable aspect the low power consumption.Yet for duplicating at a high speed, the spot heating method is inappropriate.
The fixing mechanism that combines the electric photography image processing system of melting roll device first embodiment of the present invention is shown among Fig. 5, and Fig. 6 is the skeleton view that shows in detail the melting roll device structure of Fig. 5, and Fig. 7 is the longitudinal sectional view of the melting roll device of Fig. 5 and 6.
Simultaneously with reference to Fig. 5,6 and 6A, fixing device 200 comprises melting roll device 210 and pressure roll 220, wherein melting appartus 210 is discharged on the direction at the copy paper of carrying toner image 231a and is rotated, i.e. visible clockwise direction among Fig. 5, and pressure roll 220 contacts with melting roll device 210 and rotates counterclockwise.Melting roll device 210 comprises the cylindrical fusing roller 212 with outer protection cylindrical layer 211, protects cylindrical layer to apply by teflon outward and forms in its surface, and heating element 213 is arranged in the fusing roller 212.The thermistor 230 that is used for perception fusing roller 212 surface temperatures is installed in fusing roller 212 tops.
Thermistor 230 directly contacts the also temperature of sensing protective seam 211 with protective seam 211.The inner space that is formed by the interior cylindrical cavity 242 that melts roller 212 is evacuated to predetermined vacuum level.Heating element 213 can be the spiral winding that is made of the spiral resistance heating coil, and it is provided with and directly contacts with fusing roller 212 interior cylindrical walls along internal cavities 242.Heating element 213 comprises: by the heating line 213a that resistance material is made, and this material such as siderochrome (Fe-Cr) or nickel chromium triangle (Ni-Cr) coil, and the electrical isolation overlayer 213c that is formed by magnesium oxide (MgO) is with protection heating line 213a.The insulating cover 213b of heating element 213 prevent to generate heat distortion or the characteristic changing of line 213a, and distortion or characteristic changing are easy to take place a period of time, are perhaps caused by the temperature variation in the working fluid 214 that will describe hereinafter.The outer 213b that is made by inert material such as stainless steel forms the protection overcoat that holds insulation course 213c.The line 213a that a plurality of axially spaced electrical insulator 213d will be close to axially spaced-apart remain on the isolated layer of overcoat 213b 213c central authorities in.
Shown in Fig. 6 B, 6C and 6D, heat pipe 212 inner peripheries 246 radially between the opposed inner walls distance be d
1, and heat pipe 212 outer cylinder surfaces between be d
2The outside cylinder diameter of coil 213 is greater than d
1And be slightly smaller than d
2Shown in Fig. 6 C, strong F acts on electrode 215 in the axial opposite end of coil 213, is reduced to d with the diameter with coil 213
3, it is less than d
1, and coil 213 inserts in the internal cavity 242 of heat pipe 212.Shown in Fig. 6 D, when removing power F, other surface of coil 213 each circle contacts with inner circumferential surface 246 direct heat of heat pipe 212; In fact, the removal of power F allows the cylinder outside diameter d of coil 213
1Equal the internal diameter of heat pipe 212.Spacing x between the adjacent turn of coil 213
1, x
2Needn't equate.Yet importantly, coil 213 respectively encloses the most of of outside surface or all contacts with inner periphery 246 direct heat of heat pipe 212.
Working fluid 214 is contained in the inner space of the sealing of melting roller 212, is provided with heating element 213 in this space.The volume content of working fluid 214 is 5-50%, preferably, is the volume content of 5-15% of the internal capacity 242 of fusing roller 212.Working fluid 214 has prevented to rotate the local surfaces temperature deviation of fusing roller 212 on the basis of heat pipe principle, this temperature deviation is that the existence by heating element 213 causes, and working fluid plays the effect of thermal medium, and it can be in the whole cylindrical volume than existing conventional apparatus even heat fused roller 212 in the shorter time.If the volumetric quantity of working fluid 214 is approximately 5% less than the volume of fusing roller 212, then easily parch phenomenon, in this phenomenon, working fluid is all evaporation and not liquefaction immediately after evaporation takes place not.
Fusing roller 212 can be made by stainless steel (as 304SS) or copper (Cu).If fusing roller 212 is made by stainless steel, then can use the most of well-known working fluid except water (distilled water).FC-40 (from the Ke De of 3M company) is most preferred schemes for replacing water as working fluid 214.Simultaneously, if fusing roller 212 is formed by copper, then nearly all well-known working fluid all can use.The fusing roller 212 that water (as, distilled water) becomes for copper is most preferred working fluids.
With reference to Fig. 7, cover part 218 is connected on the axial relative two ends of fusing roller 212, melts the inner cylinder cavity of roller 212 and forms vacuum-tight inner space 242 thus with sealing.The axially relative terminal of coil 213 forms electrode 215, and it extends axially by also surpassing cover part 218, and with exercisable cooperation electrical contact such as slip ring (not shown), and slip ring provides electric current to pass through coil 213.Non-conducting brush 216 and gear can also be installed on the outer cylinder surface of fusing roller 212 in conjunction with cover part 217.Electrode 215 is electrically connected on the conductivity end lead-in wire of heating element 213.Although the electrical connection that heating element 213 structures and electrode 215 are connected on the power supply is unspecified, this structure can be finished easily.
In manipulating process, the melting roll device 210 with said structure is rotated by independent rotating mechanism.For this purpose, optional feature can be set.For example, gear is optional features in conjunction with cover part 217, can be connected to be used to rotate the required rotation spur gear of melting roll device 210.
In the fixing device 200 of the electric photography image processing system of constructed in accordance with the principles, along with electric current passes through electrode 215, promptly supply with and flow into heating element 213 from power supply, when electric current is flowed through the spiral winding of heating element 213, heating element 213 is because resistance produces heat, and fusing roller 212 is from inside to outside by the heat heating that is produced.Simultaneously, the working fluid 214 that is contained in the fusing roller 212 is subjected to thermal evaporation.The transfer of heat that heating element 213 produces is to the cylindrical wall of fusing roller 212, melts the working fluid that roller 212 main bodys are evaporated simultaneously and evenly heats.As a result, the surface temperature of fusing roller 212 reaches the target temperature of fusion in the quite short time cycle.The imbibition core of being made by perforated layer or copper or stainless metallic sieve 244 forms cylindrical as kapillary; Imbibition core 244 can be arranged between the coil 213 adjacent windings along inner circumferential surface 246.The suitable material that is used for melting roller 212 is listed at table 2.Above-mentioned FC-40 or water (distilled water), perhaps the material of listing in the table 3 can be used as working fluid 214.When selecting water (distilled water) as working fluid 214, melting roll device can low-cost the manufacturing and do not influence environment.In case when the temperature of fusing roller 212 reached the target temperature of fusion of toner image fusing, toner image shifted (that is permanent bond) to copy paper.When the copy paper that shifts toner image absorbed heat from fusing roller 212, the working fluid of evaporation was transformed into its liquid phase in the internal cavities 242 of fusing roller 212.Liquefied working fluid can be followed and be heated by heating element 212 once more and evaporate, thereby the temperature of fusing roller 212 can remain in predetermined temperature.
If the temperature of fusion scope of toner is at 160-180 ℃, melting roll device then constructed according to the invention can reach target temperature within about ten seconds.So response is by the surface temperature of the fusing roller 212 of thermistor 230 perception, the surface temperature of fusing roller 212 is maintained in the predetermined temperature range by the current impulse formula is imposed on coil 213.If thermistor 230 and controller be the control surface temperature correctly, make the surface temperature of fusing roller 212 raise suddenly, then closely operationally approach to melt the surface temperature of the thermostat 240 perception fusing roller 212 of roller 212 peripheries, and cut off current supply, in case overheated to coil 213.Electric energy is supplied with operation and can be changed according to target temperature.People will recognize that electric energy is supplied with operation can be by periodicity electric energy connection/cut-out control or the such control technology control of duty cycle rate.
Melting roll device with this configuration can be by following step manufacturing:
(a) preparation is as the metal tube of fusing roll material;
(b) by the exposed surface of clean metal pipe with the liquid clean metal pipe of distilled water or volatilization;
(c) clean the exposed surface that the spiral resistance heating coil cleans the spiral resistance heating coil by liquid with distilled water or volatilization;
(d) the spiral resistance heating coil is inserted in the ring-shaped inner part cylindrical volume of metal tube, this spiral resistance heating coil bends to spiral winding, and its external diameter is equal to or slightly greater than the internal diameter of metal tube;
(d ') optionally inserts the imbibition core between the adjacent turn of heater coil;
(e), therefore maintain the inlet of working fluid, and two end leads of resistance heating coil extend through metal tube as electrical lead with the relative cardinal extremity of end cover part sealed metal tube;
(f) by find time, heating and cool metal pipe and with external gas internally volume discharge, so that gas is discharged from the pipe interior volume, and in internal capacity, produce vacuum;
(g) inject by the working fluid (as FC-40 or distilled water) of Working-fluid intaking the 5-50% volume:
(h) Working-fluid intaking of sealed metal tube;
(i) with teflon spray metal tube-surface, and dry and polishing metal pipe;
(j) will insert an end of metal tube as the non-conduction lining of bearing; And
(k) at fusing roller one end that forms by metal tube the gear mounting cup spare of being made by metal, heat resistant plastic or epoxy is installed.
In the process of making melting roll device, insert at the spiral resistance heating coil (if using the imbibition core then to insert the imbibition core) afterwards when with end cover part 218 axially relatively cardinal extremity weld when covering metal tube, argon gas is via the internal cavities 242 of Working-fluid intaking injection metal tube, and purpose is to prevent the heat pipe oxidation.Before working fluid is injected metal tube, external gas is discharged in the volume 242 internally, and internal capacity is found time and repeat heating and cooling under vacuum, to such an extent as to discharge all gas from the internal capacity of metal tube, removes all foreign matters that are bonded to inner wall of metal tube thus basically.For example, in a kind of method of discharging internal cavities 242, metal tube must be heated to 250 ℃ temperature, and internal pressure is 40 atmospheric pressure.At room temperature, internal cavities 242 should have appropriate pressure; In other words, should be in cavity 242 no molecule.
Fig. 8 A is the cut-open view of melting roll device second embodiment of constructed in accordance with the principles, and Fig. 8 B is the local longitudinal sectional view of melting roll device among Fig. 8 A.With reference to Fig. 8 A and 8B, outer tube 312 forms outside surface, and the outside surface of this outer tube is formed with the protective seam 311 that has applied such as teflon material.The interior pipe 314 coaxial middle parts that are arranged on outer tube 312, the external diameter of interior pipe 314 is less than the internal diameter of outer tube 312.The annular space 318 that holds working fluid 214 and heating element 313 is formed between outer tube 312 and the interior pipe 314.Heating element 313 forms along the interior cylindrical surface of outer tube 312.Annular space be full of working fluid 214 than lower part.The inner cylinder volume 314a of interior pipe 314 can be cylindrical cavity solid, hollow or that find time.
Fig. 9 A is the cut-open view of the different structure of traditional melting roll device, and Fig. 9 B is the longitudinal sectional view of the partly cut-away of melting roll device among Fig. 9 A.Other structure part that this structure of melting roll device is different from melting roll device is the position of heating element 313a.Referring again to Fig. 9 A and 9B, outer tube 21 is formed with the outside surface of armor coated 21a.The interior pipe 31 coaxial middle parts that are arranged on hollow cylindrical cavity outer tube 21, the external diameter of interior pipe 31 is less than the internal diameter of outer tube 21.The hollow ring space 38 that is used for working fluid 33 is formed between the outside cylindrical surface of outer tube 21 inner cylindrical surface and interior pipe 31.Be used for being arranged on interior pipe 31 middle parts by the heating element 12 of the inside surface of pipe 31 in the radiation heating.Heating element 12 is radiations heat energy generating meanss, as Halogen lamp LED.The radiation heat heating of interior pipe 31 origin spontaneous heating devices 12, working fluid 33 vaporizations that therefore contact with interior pipe 31 outer cylinder surfaces are also evaporated, and in other words, become gas phase from liquid phase.
Figure 10 A is the cut-open view of the 3rd embodiment of the melting roll device of constructed in accordance with the principles, and Figure 10 B is the local longitudinal sectional view of melting roll device among Figure 10 A.The 3rd embodiment of melting roll device can be considered to the combination by the fusing roll assembly of first and second embodiment of principle of the invention structure.With reference to Figure 10 A and 10B, outer tube 312 is formed with the outside surface with the protective seam 311 that applies as teflon material.The interior pipe 314 coaxial hollow center that are arranged on outer tube 312, the external diameter of interior pipe 314 is less than the internal diameter of outer tube 312.Annular space 318 contains working fluid 214, the first heating elements 313 and is arranged between outer tube 312 and the interior pipe 314.Be used for heating the coaxial hollow center that is arranged on interior pipe 314 of the second heating element 313a of interior pipe 314 inwalls by radiation heating.The second heating element 313a is radiations heat energy generating means such as Halogen lamp LED.The radiation heat heating of interior pipe 313 origin spontaneous heating device 313a, working fluid 214 evaporations that therefore contact with interior pipe 314 outside surfaces also present its vapour phase.First heating element 313 forms and directly heats the inner periphery of outer tube 312 along outer tube 312 inner peripheries, but also direct heated working fluid 214, and in case when melting roll device is removed under its standby mode, make working fluid 214 evaporate.Working fluid 214 in the hollow ring space 318 between outer tube 312 and interior pipe 314 is simultaneously by first heating element 313 and second heating element 313a heating and evaporate.Referring now to Figure 10 C, effectively heating in the very short time cycle can compared with aforementioned other embodiment according to the melting roll device of third embodiment of the invention.
Figure 10 C required time when relatively these rollers reach operating temperature, the relative performance of the fusing roll assembly embodiment of two kinds of traditional structures and constructed in accordance with the principles has been described.Curve A has illustrated the fusing roller that is configured with halogen thermal source lamp shown in Figure 2.This structure needs two to three minutes time, so that the outside surface of warm-up mill arrives 185 ℃ operating temperature.The performance of the indirect heating structure shown in curve B representative graph 9A, the 9B; This structure needs the time in 20 to 30 seconds, so that the warm-up mill outside surface reaches 185 ℃.Curve C has illustrated an embodiment who constructs shown in Figure 10 A, 10B; This embodiment need be similar to the time in 12 seconds, to reach 185 ℃ operating temperature.In addition, do not resemble the assembly of the indirect heating that the halogen thermal source lamp assembly represented by curve A and curve B represent, the temperature difference on the axial length of the fusing roller outer circumferential surface in the embodiment of constructed in accordance with the principles is less than 2 degrees centigrade, and as a rule, on axial length less than 1 degree centigrade.Under the contrast, the difference variation of the structure of halogen thermal source lamp and indirect heating on axial length surpasses 2 degrees centigrade, and its terminal end is than cold 2 degrees centigrade of fusing roller core.
Figure 11 A is the cut-open view of melting roll device the 4th embodiment of constructed in accordance with the principles, and Figure 11 B is the local longitudinal sectional view of fusing roll assembly among Figure 11 A.The hollow ring inner space 318 of the melting roll device of the 4th embodiment by the isolated radially width of cloth of a plurality of arcs sheet 315 separately, radially width of cloth sheet 315 radially extends between the external peripheral surface of interior pipe 314, strides across the inner periphery that inner space 318 arrives outer tube 312.The inner space of melting roll device is divided into a plurality of dispersion areas thus, according to the structure of embodiment, can maybe needn't connect, so that the vapour phase of working fluid 214 is passed through between each district.The outer circumferential surface of outer tube 312 has the outside surface that is coated with protective seam 311.In pipe 314 external diameter basically less than the internal diameter of outer tube 312, and axially be positioned at the middle part of outer tube 312, therefore keep the hollow ring space 318 of working fluid 214 to be arranged between outer tube 312 and the interior pipe 314.This annular space 318 is separated into unit space by a plurality of baffle plates 315, and baffle plate is axially placed in the hollow central bore of outer tube 312, and a plurality of blades that radially extend 315 form the section baffle plate of the annular space 318 of radially being arranged to predetermined angular.Working fluid 214 is contained in each unit space.Be used for middle part by pipe 314 in coaxial being installed in of heating element 313a of pipe 314 inside surfaces in the radiation heating.Heating element 313a is radiation heat generation device such as Halogen lamp LED.Interior pipe 314 is by the radiation heat heating from heating element 313a, and the working fluid 214 that therefore contacts with interior pipe 314 outside surfaces evaporates.Working fluid 214 is transferred to outer tube 312 with heat by evaporation and condensation cycle in each unit space.Baffle plate 315 can form separate part or the form for combining with the outside surface of interior pipe 214.Working fluid 214 is distributed in each unit space, and therefore the working fluid 214 that contacts with outer tube 312 inside surfaces evaporates in each unit space and condensation.
Figure 12 is the fragmentary, perspective view of melting roll device the 5th embodiment of constructed in accordance with the principles.The exterior cylindrical surfaces of outer tube 312 is coated with the protective seam 311 such as teflon material.The external diameter of interior pipe 314 is less than the internal diameter of outer tube 312, and the interior pipe 314 coaxial middle parts that are arranged on outer tube 312, and therefore, the annular space 318 that is used for working fluid 214 is formed between outer tube 312 and the interior pipe 314.Annular space is separated into unit space by a plurality of baffle plates 315 that radially extend of radially being arranged to predetermined angular, and working fluid 214 is contained in each unit space.The cylindrical jacket of being made by heat conducting material such as stainless steel 317 surrounds the radial outer end of baffle plate width of cloth sheet 315 and coil 313 and the working fluid 214 in the unit space is separated.Center on the overcoat 317 of interior pipe 314 and first heating element, 313 encirclements that baffle plate 315 is formed the spiral resistance heater.Be used for being arranged on the middle part of interior pipe 314 by the second heating element 313a of pipe 314 inside surfaces in the radiation heating.The second heating element 313a is the radiation heat generating means, as Halogen lamp LED.In pipe 314 by from the heating of the radiation heat of the second heating element 313a, make and separate divided by preparing on printable media after the printed images from its holding state that the working fluid 214 that contact with interior pipe 314 outside surfaces evaporates at melting roll device.First heating element 313 also contacts with the inside surface of outer tube 312; Outer tube 312 and working fluid 213 are by 313 heating of first heating element.Working fluid 213 arrives outer tube 312 with transfer of heat by evaporation and condensation cycle in each unit space.Baffle plate 315 can form separate part or form inside surface array configuration with overcoat 317.Although the annular space 318 between outer tube 312 and the interior pipe 314 is separated by baffle plate 315, in specific embodiment, working fluid 214 can flow through aperture or gap between baffle plate 315 and the outer tube 312.In other embodiment of this embodiment, overcoat 317 is limited to working fluid in the different unit spaces and prevents and flows between unit space.
Figure 13 is the fragmentary, perspective view of melting roll device the 6th embodiment of constructed in accordance with the principles, has used the melting roll device among the first above-mentioned embodiment.Melting roll device among Figure 13 comprises: cylindrical fusing roller 312, and its outside surface has applied teflon protective seam 311; Heating element 313 is arranged in the inner space 318 of melting roller 312; And baffle plate 316, have the separation width of cloth sheet 316a of a plurality of radial arrays, so that the inner space is divided into the subspace, formed the exterior cylindrical overcoat.The maximum outside diameter of baffle plate 316 is less than the internal diameter of fusing roller 212, and baffle plate is centered on by the heating element 313 that spiral twines.
Although the melting roll device among the 6th embodiment has the inner space 318 that is separated into a plurality of unit spaces by the distance piece 316a of baffle plate 316, the working fluid perforate 319 between the inside surface of baffle plate 316a and interior pipe 314 of can flowing through.
In the above-described embodiments, do not illustrate electric energy impose on heating element process electrode or be used to rotate and support the structure of heating element, this is because these structures can be realized easily by those skilled in the art.
Figure 14 is the synoptic diagram of the fixing device structure of electric photography image processing system, has used the melting roll device of constructed in accordance with the principles.The axial opposed end extend past end cover part 218 of coil 313 and form electrode 215; Electrode 215 is connected on two ends of melting roll device 400, passes through heating element 313 (and if second heating element 313a that exists) so that electric current to be provided.Electrode 215 is electrically connected on the heating element 313 and may contacts the brush (not shown) of being made by conductive of material such as carbon slidably, and brush connects cross-over connection person's power supply again.Brush can be supported by spring, makes brush push electrode 215 to.Temperature controlled thermostat according to melting roll device 400 is connected between brush and the power supply by electrical signal line.
Along with electric current imposes on heating element 313 (and if exist second heating element 313a) by power supply, by the coil 313 internal resistances heat that has a resistance, with heat fused roller main body.Simultaneously, heating is contained in the working fluid in the fusing roller, till the working fluid evaporation.The heat of fusing roller inside surface origin spontaneous heating device and (that is, vapour phase) working fluid heating of evaporation, make the main body of fusing roller can evenly be heated rapidly to the target temperature of fusion (as, 185 ℃).The surface temperature of fusing roller main body cylinder shape outside surface is detected by independent thermistor, and the magnitude of current that imposes on heating element is adjusted according to the temperature that is detected.
In order to understand operation easily, heat pipe of the present invention will be described according to melting roll device of the present invention.The term heat pipe refers to heat removal devices, its utilize the working fluid latent heat required from its liquid phase to its vapour phase phase transformation with heat from high heat density state transitions to the low-heat density state.Because heat pipe utilizes the phase-change characteristic of working fluid, so its heat-conduction coefficient is higher than any known metal.At room temperature the heat-conduction coefficient of Cao Zuo heat pipe is that k is silver or the copper hundred times of 400W/mk greater than heat-conduction coefficient.
Figure 15 is the curve of explanation as temperature rising and heat pipe working fluid phase transformation of function between the working time.Table 1 shows the effective thermal conductivity of heat pipe and other heat conductive material.Table 1
| Material | Effective thermal conductivity (W/mK) |
| Heat pipe | 50,000-200,000 |
| | 180 |
| | 400 |
| Adamas | 2,000 |
Need the energy of 4.18kJ to be elevated to 26 ℃ from 25 ℃ with temperature with 1kg water.When the thing of water becomes vapour phase and when not having temperature variation, needs 2, the energy of 442Kj from liquid phase transition.Become by liquid-vapour phase, heat pipe shifts about 584 times of bigger latent heat.For heat pipe work at room temperature, heat-conduction coefficient is greater than the silver or the copper hundred times that are known as optimum heat conductor.Utilize the pyroconductivity of the heat pipe that liquid metal at high temperature works as working fluid to reach 10
8W/Mk.
Figure 16 shows the inner structure of the heat pipe that combines the imbibition core, and forming capillary pipe structure in the inside of heat pipe, and its heat conduction method changes according to liquid phase to vapour phase and vapour phase to liquid phase.Resistance heating coil (not illustrating separately in Figure 16) and imbibition core are arranged in the cylindrical shape and are directly installed on the circumferential surface of heat pipe.Table 2 shows and is used for the recommended of various working fluids and not recommended heat resistant material.
Table 2
| Working fluid | Recommended | Not recommended |
| Ammonia | Aluminium, carbon steel, stainless steel, nickel | Copper |
| Acetone | Aluminium, copper, stainless steel, silica | |
| Methyl alcohol | Copper, stainless steel, nickel, silica | Aluminium |
| Water | Copper, 347 stainless steels | Aluminium, stainless steel, nickel, carbon steel, chromium nickel nickel alloy, silica |
| Thermex | Copper, silica, stainless steel |
Table 3 shows the various suitable working fluid for the different operating temperature range.
Table 3
| Utmost point low temperature (273～-120 ℃) | Low temperature (120～470 ℃) | High temperature (450～2700 ℃) |
| Helium | Water | Caesium |
| Argon | Ethanol | Sodium |
| Nitrogen | Methyl alcohol, acetone, ammonia, freon | Lithium |
We have found that several Considerations are arranged when selecting working fluid: 1) material with the heat pipe use adapts; 2) in heat pipe, has the working fluid of proper operation temperature; And 3) pyroconductivity of working fluid.
When the fusing roller of heat-pipe-type by stainless steel (SUS) or copper (Cu) when making, suitable working fluid is aspect adapting with heat resistant material and restricted with the working temperature aspect that adapts.FC-40 is an atmospheric pressure or littler saturation pressure under 165 ℃ of working temperatures, and is considered to quite suitable material.
Known FC-40 is nontoxic, nonflammable, and with most of metals compatibles.FC-40 also has zero ozone and exhausts tendency.According to the thermodynamics as the FC-40 of working fluid, the relation between saturation temperature and the pressure is represented by following formula (1):
Wherein, A=8.2594, B=2310, temperature T is with a degree centigrade measurement.
Fig. 7 illustrates the curve that FC-40 and water change with respect to saturation temperature as the saturation pressure of working fluid.Table 4 illustrates the saturation pressure of the FC-40 under specific saturation temperature that obtains from Figure 15.
Table 4
| Saturation temperature (℃) | Saturation pressure (crust) |
| ?100 ?150 | ?0.15 ?0.84 |
| ?200 ?250 | ?3.2 ?9.3 |
| ?300 ?350 | ?22.54 ?47.5 |
| ?400 ?450 | ?89.5 ?154.6 |
About the safe operation of heat pipe, be used for the suitable material of heat pipe and its end cover part thickness according to ASME (i.e., ASME) code is determined, this code is the security measurement standard that is used for pressure vessel.For example, if the thickness of cylindrical heat pipe its diameter 10% in, be applied to the maximum stress (σ on the wall so
Max (1)) and heat pipe domed ends cover spare (σ
Max (2)) be expressed as follows:
Wherein Δ P is inside heat pipe and outside pressure differential, d
0Be the external diameter of heat pipe, t
1Be the thickness of heat pipe, t
2Be the thickness of end cover part.
According to the ASME code, the maximum allowable stress under arbitrary temp is 0.25 times of maximum critical pulling strengrth under this temperature.If the steam pressure of the working fluid in the heat pipe scope equals the saturation vapour pressure of working fluid, then pressure differential (Δ P) equals the difference between steam pressure and the atmospheric pressure.
Figure 18 is the curve that the critical pulling strengrth as the temperature variation function for different heat resistant materials changes, wherein have three kinds of the fusing roller of the heat pipe of being made by aluminium (Al), copper (Cu) and No. 304 stainless steels (SS304) not isomorphism types, temperature range is between about 0 ℃ and about 500 ℃.Figure 19 A is the heat pipe that forms for by aluminium, copper and 304 stainless steels structure, as FC-40 during as working fluid, and maximum allowable stress and act on maximum stress on the heat pipe wall with respect to the figure line of temperature variation.Figure 18 B is the heat pipe that forms for by aluminium, copper and 304 stainless steels structure, when distilled water when working fluid and temperature range are between about 0 ℃ and about 500 ℃, act on maximum stress on the copper heat pipe wall with respect to the figure line of temperature variation.Shown in Figure 19 A, the maximum allowable stress of stainless steel (SS304) is widely greater than the maximum allowable stress of copper or aluminium.Will guarantee the safe operation that fluid free leaks for heat pipe, and the working temperature of the end cover part that is formed by stainless steel (SS304) structure reaches about 400 ℃.
Figure 20 A and 20B are respectively FC-10 and distilled water during as working fluid, temperature range greater than 150 ℃ between less than 500 ℃, act on the figure line that the maximum stress on the copper heat pipe changes with respect to tube thickness.Shown in Figure 20 A and 20B, although the thickness of heat pipe respectively when FC-10 when the working fluid from 0.8mm to 1.5mm, when distilled water when the working fluid from 1.0mm to 1.8mm, but be applied to maximum stress on the heat pipe in operating temperature greater than about 165 ℃ and not too many variation the during less than 200 ℃.
Figure 21 and 22 is temperature variation (between 0 ℃ to the 400 ℃) curves with respect to time (in the period between 0 second to 65 seconds) measurement in the middle part of the fusing roller for the melting roll device of above-mentioned first embodiment.Melting roll device has the fusing roller that is made of copper, and contains distilled water as working fluid.Fusing roller thickness is 1.0mm, and external diameter is 17.85mm, and length is 258mm.This test is to carry out under the 47rpm at fusing roller rotating speed, and the impedance of spiral resistance heating coil is 32 Ω, and voltage is 200V, and instantaneous maximum power consumption is about 1.5Kw.The spiral resistance heating coil directly contacts with the inner periphery of fusing roller.
Figure 21 shows and contains the measurement result that the distilled water that occupies fusing roller internal volume 10% is used as the melting roll device of working fluid.Figure 22 shows the measurement result of the melting roll device that contains the distilled water that occupies fusing roller 30%.With reference to Figure 21, this prototype spends 8 to 12 seconds and is elevated to about 175 ℃ operating temperature will melt roll temperature from about 22 ℃ room temperature, but just reaches 200 ℃ less than 14 seconds.With reference to Figure 22, its cost will be melted roll temperature in 13 seconds and will be elevated to 175 ℃ from about 22 ℃ room temperature, but only need 22 seconds just to reach 200 ℃.
The result who compares Figure 21 and 22, obviously, temperature increase rate changes along with the plot ratio that is contained in the working fluid in the fusing roller sealed inside.According to the experimental result of carrying out under various conditions, the fusing roller has under the amount of working fluid that occupies fusing roller inner space 5-50% and can work.Temperature increase rate has only when being full of working fluid in the volume of 5-15% higher at the fusing roller.
Form device with traditional images and compare aspect the temperature increase rate, for melting roll device of the present invention, for taking one of them image processing system of its feasible design, need be continuously to the melting roll device supply of electrical energy under holding state.Although supply of electrical energy when image forms beginning is compared with the equipment that contemporaneity uses, the melting roll device that forms constructed according to the invention can form image under high speed, promptly still can melt toner image.
When the volume of working fluid surpassed 50%, it is unpractical slow that temperature increase rate becomes.Simultaneously, if the volume of working fluid less than 5% o'clock, because working fluid is supplied with deficiently, parches phenomenon or generation or is easy to and take place, therefore melt roller and can not work or can not work as heat pipe at all.
In the melting roll device of constructed in accordance with the principles, electric energy can be provided as 90-240 volt, and frequency is 50-70 hertz and high frequency more.
As mentioned above, melting roll device constructed according to the invention comprises heater coil and the working fluid in metal molten roller main body with extremely good conductivity, therefore melting the roller surface can be by the instantaneous target temperature of fusion that is heated to, with the fixing toner image of having transferred on the copy paper.Compare for the direct surface hot type melting roll device of the well heater of base with traditional Halogen lamp LED type or use palladium (Pd), ruthenium (Ru) or carbon (C), roller is melted in the present invention can reach the target temperature of fusion within a short period of time, and the power consumption reduction, and the surface temperature of fusing roller can evenly be kept.Melting roll device of the present invention does not need preheating and stand-by time, and is equipped with any image processing system of melting roll device of the present invention, does not need to provide electric energy with ready-to-print to the fusing roller as printer, duplicating machine or facsimile recorder yet.Therefore, total power consumption of image processing system reduces.In addition, melting roll device of the present invention on the heat pipe principle basis, therefore melt roller vertically on Temperature Distribution can evenly be controlled, more excellent thus raising the toner pre-arcing characterisitics.
In addition, melting roll device of the present invention can be produced in enormous quantities easily, and guarantees safe operation.The parts of melting roll device are compatible with other commercial available parts.The quality of melting roll device is controlled easily.High-speed printer (HSP) can adopt melting roll device of the present invention to realize.
Method according to melting roll device of the present invention and manufacturing melting roll device has following advantage.
At first, melting roll device can be with simple automated process manufacturing.
Secondly, heat pipe axially or the temperature variation less (in 1 ℃ scope) vertically.
The 3rd, high-speed printer (HSP) can easily be realized with melting roll device.
The 4th, be configured as isolated system as the thermal source and the heat pipe of melting roll device critical piece, so safe operation can be made and guarantee to melting roll device in enormous quantities easily.The parts of melting roll device are compatible with other commercial available unit.The quality of melting roll device is controlled easily.
The 5th, owing to the working fluid continuous evaporation and the condensation cycle that are contained in the heat pipe sealed, although inside heat pipe pressure increases down at high temperature (be an atmospheric pressure or be lower than 165 ℃ for FC-40), the risk of blast or gross distortion is extremely low.
Although the present invention is specifically described and illustrates at the preferred embodiment of the present invention, but to those skilled in the art, under the prerequisite that does not break away from determined inventive concept of claims and scope, the variation on various forms and the details all is feasible.
Claims (40)
1. melting roll device comprises:
Cylindrical fusing roller, it has the axial opposed end that forms internal cavities, and internal cavities seals and is evacuated and is reduced to preset pressure;
Be arranged on the heating element in the described internal cavities between the described end, described heating element directly contacts on described fusing roller inner cylindrical surface axial length with described fusing roller; And
Working fluid is contained in fusing and directly contacts with described heating element in the roller.
2. melting roll device as claimed in claim 1, it is characterized in that, described heating element comprises the resistance heating coil that is spirally wound in the described internal cavities, and the axial opposite end of resistance heating coil extends out by the different described end of described fusing roller from described fusing roller.
3. melting roll device as claimed in claim 1 is characterized in that, the external diameter of heating element is greater than fusing roller internal diameter, the inner cylindrical wall of heating element pressure contact melting roller.
4. melting roll device as claimed in claim 2 is characterized in that, the external diameter of heating element is greater than fusing roller internal diameter, the inner cylindrical wall of heating element pressure contact melting roller.
5. melting roll device as claimed in claim 1 is characterized in that, the fusing roller is made of copper.
6. melting roll device as claimed in claim 1 is characterized in that, the fusing roller is made by stainless steel.
7. melting roll device as claimed in claim 1 is characterized in that, working fluid is a distilled water.
8. melting roll device as claimed in claim 1 is characterized in that, the 5-50% that to be contained in the described working fluid weight range in the described fusing roller be described internal cavities volume.
9. melting roll device as claimed in claim 1 is characterized in that, the 5-15% that to be contained in the described working fluid weight range in the described fusing roller be described internal cavities volume.
10. melting roll device comprises:
Cylindrical fusing roller, it has the axial opposed end that forms internal cavities, and internal cavities seals and is evacuated and is reduced to preset pressure;
Be arranged on the heating element in the described internal cavities between the described end, described heating element directly contacts on described fusing roller inner cylindrical surface axial length with described fusing roller;
Working fluid is contained in fusing and directly contacts with described heating element in the roller,
Baffle plate is separated into a plurality of unit spaces with described internal cavities.
11. melting roll device as claimed in claim 10, it is characterized in that, described heating element comprises the resistance heating coil that is spirally wound in the described internal cavities, and the axial opposite end of resistance heating coil extends out by the different described end of described fusing roller from described fusing roller.
12. melting roll device as claimed in claim 10 is characterized in that, described baffle plate comprises a plurality of width of cloth sheets that radially extend.
13. melting roll device as claimed in claim 10 is characterized in that, the external diameter of heating element is greater than fusing roller internal diameter, the inner cylindrical wall of heating element pressure contact melting roller.
14. melting roll device as claimed in claim 10 is characterized in that, the fusing roller is formed by copper.
15. melting roll device as claimed in claim 10 is characterized in that, the fusing roller is formed by stainless steel.
16. melting roll device as claimed in claim 10 is characterized in that, working fluid is a distilled water.
17. melting roll device as claimed in claim 10 is characterized in that, the 5-50% that to be contained in the described working fluid weight range in the described fusing roller be described internal cavities volume.
18. melting roll device as claimed in claim 10 is characterized in that, the 5-15% that to be contained in the described working fluid weight range in the described fusing roller be described internal cavities volume.
19. a melting roll device comprises:
Cylindrical fusing roller comprises the outer tube with inner first diameter, and has the interior pipe less than outside second diameter of described first diameter, described outer tube and described in form annular space between the pipe, described annular space is evacuated and is reduced to preset pressure;
Be arranged on the heating element in the described annular space; And
Be contained in the working fluid in the described annular space, Fluid Volume is less than the volume of described annular space.
20. melting roll device as claimed in claim 19 is characterized in that, heating element comprises and is arranged on first heating element that directly contacts with described outer tube in the described annular space.
21. melting roll device as claimed in claim 19 is characterized in that, first heating element is the resistance heating coil that is spirally wound in the described annular space.
22. melting roll device as claimed in claim 20 is characterized in that, first heating element directly contacts along the setting of outer tube inner cylindrical surface and with this surface.
23. melting roll device as claimed in claim 19 is characterized in that, described heating element comprises first heating element that is arranged in the described annular space and second heating element that is arranged in the described interior pipe.
24. melting roll device as claimed in claim 20 is characterized in that, described first heating element comprises the resistance heating coil that spiral twines, and described second heating element comprises Halogen lamp LED.
25. melting roll device as claimed in claim 19 is characterized in that, interior pipe and outer tube are made of copper.
26. melting roll device as claimed in claim 19 is characterized in that, interior pipe and outer tube are made by stainless steel.
27. melting roll device as claimed in claim 19 is characterized in that, working fluid is a distilled water.
28. melting roll device as claimed in claim 19 is characterized in that, the 5-50% that to be contained in the described working fluid weight range in the described fusing roller be the described volume of described annular space.
29. melting roll device as claimed in claim 19 is characterized in that, the 5-15% that to be contained in the described working fluid weight range in the described fusing roller be the described volume of described annular space.
30. melting roll device as claimed in claim 19 is characterized in that, also comprises a plurality of baffle plates that described annular space are separated into a plurality of unit spaces.
31. a melting roll device comprises:
Cylindrical fusing roller, it has the axial opposed end that sealing forms internal cavities, and internal cavities is evacuated to preset pressure;
Be arranged on the heating element in the described internal cavities of described fusing roller, described heating element spiral twines and directly contacts with described fusing roller inner cylindrical wall;
Be contained in a certain amount of working fluid in the described internal cavities;
Applied the protective seam on fusing roller exterior cylindrical surface, described protective seam separates with toner image easily; And
Be connected to the electrode on the described heating element, can apply voltage by described heating element.
32. melting roll device as claimed in claim 31 is characterized in that, heating element is a resistance heating coil.
33. melting roll device as claimed in claim 31 is characterized in that, resistance heating coil surface-coated matcoveredn.
34. melting roll device as claimed in claim 33 is characterized in that protective seam is made by magnesium oxide.
35. melting roll device as claimed in claim 31 is characterized in that, the voltage range that is applied on the heating element is the 90-240 volt.
36. melting roll device as claimed in claim 31 is characterized in that, the electric voltage frequency scope that is applied on the heating element is the 50-70 hertz.
37. a method of making melting roll device comprises:
Form cylindrical fusing roller, its internal cavities extends axially between the axial opposite end of described roller;
The heater coil that is wound in spiral is inserted in the described internal cavities;
The described internal cavities of finding time;
Be full of described internal cavities with the working fluid part; And
Seal described cavity, and the electrical connectivity that described heater coil is passed in maintenance simultaneously.
38. method as claimed in claim 37 also comprises:
Formation has the described fusing roller of the described internal cavities of inner first diameter;
Twine described heater coil, make it before described heater coil is inserted described internal cavities, have outside second diameter greater than described first diameter;
In described insertion process, reduce described second diameter; And
After described insertion, discharge described heater coil to guarantee described second diameter.
39. method as claimed in claim 37 also comprises interior pipe is placed in the described internal cavities, described heater coil is arranged between described fusing roller and the described interior pipe.
40. melting roll device as claimed in claim 37 is characterized in that, also comprises described internal cavities is separated into a plurality of sections, each section contains a large amount of described working fluids.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US25711800P | 2000-12-22 | 2000-12-22 | |
| US60/257,118 | 2000-12-22 | ||
| KR13451/01 | 2001-03-15 | ||
| KR10-2001-0013451A KR100400003B1 (en) | 2000-12-22 | 2001-03-15 | Fusing roller apparatus of electrophotographic image forming apparatus |
| KR13451/2001 | 2001-03-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1360231A true CN1360231A (en) | 2002-07-24 |
| CN1209688C CN1209688C (en) | 2005-07-06 |
Family
ID=26638886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01137402 Expired - Fee Related CN1209688C (en) | 2000-12-22 | 2001-11-13 | Melting roll device for electrofax image forming device |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1220054B1 (en) |
| JP (1) | JP3680995B2 (en) |
| CN (1) | CN1209688C (en) |
| DE (1) | DE60104640T2 (en) |
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| CN100501597C (en) * | 2002-07-25 | 2009-06-17 | 三星电子株式会社 | Image fixing device for image forming equipment |
| CN101315259B (en) * | 2007-05-30 | 2011-10-26 | 喻孟华 | Heat-accumulation material |
| CN102650845A (en) * | 2011-02-28 | 2012-08-29 | 株式会社理光 | Image fixing device |
| CN104614963A (en) * | 2013-11-01 | 2015-05-13 | 东友科技股份有限公司 | Roller and fixation device provided with roller |
| CN107885061A (en) * | 2016-09-29 | 2018-04-06 | 佳能精技立志凯株式会社 | Fixing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5508745B2 (en) * | 2008-04-08 | 2014-06-04 | ハイデック株式会社 | Induction heating roll |
| TWI514096B (en) * | 2013-11-01 | 2015-12-21 | Teco Image Sys Co Ltd | Roller and fixing device using same |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0432885A (en) * | 1990-05-29 | 1992-02-04 | Ricoh Co Ltd | Fixing device |
| KR0148507B1 (en) * | 1994-10-07 | 1998-12-01 | 김광호 | Heater roller for fixing electronic photo device |
| US5752150A (en) * | 1995-09-04 | 1998-05-12 | Minolta Co., Ltd. | Heating apparatus |
| BR9605225A (en) * | 1995-10-31 | 1998-07-21 | Xerox Corp | Apparatus for fixing images by melting on a substrate printing machine in which images are fixed by melting on a substrate and the process of heating a fusion piece on a printing machine |
-
2001
- 2001-11-06 DE DE2001604640 patent/DE60104640T2/en not_active Expired - Lifetime
- 2001-11-06 EP EP20010309414 patent/EP1220054B1/en not_active Expired - Lifetime
- 2001-11-13 CN CN 01137402 patent/CN1209688C/en not_active Expired - Fee Related
- 2001-12-25 JP JP2001391955A patent/JP3680995B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100501597C (en) * | 2002-07-25 | 2009-06-17 | 三星电子株式会社 | Image fixing device for image forming equipment |
| CN101315259B (en) * | 2007-05-30 | 2011-10-26 | 喻孟华 | Heat-accumulation material |
| CN102650845A (en) * | 2011-02-28 | 2012-08-29 | 株式会社理光 | Image fixing device |
| CN102650845B (en) * | 2011-02-28 | 2014-08-13 | 株式会社理光 | Image fixing device |
| CN104614963A (en) * | 2013-11-01 | 2015-05-13 | 东友科技股份有限公司 | Roller and fixation device provided with roller |
| CN107885061A (en) * | 2016-09-29 | 2018-04-06 | 佳能精技立志凯株式会社 | Fixing device |
| CN107885061B (en) * | 2016-09-29 | 2021-03-09 | 佳能精技立志凯株式会社 | Fixing device |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1220054B1 (en) | 2004-08-04 |
| DE60104640T2 (en) | 2005-01-05 |
| DE60104640D1 (en) | 2004-09-09 |
| JP2002304076A (en) | 2002-10-18 |
| EP1220054A1 (en) | 2002-07-03 |
| JP3680995B2 (en) | 2005-08-10 |
| CN1209688C (en) | 2005-07-06 |
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