CN207301642U - Fixing device and image processing system - Google Patents

Abstract

The utility model, which provides a kind of fixing device and image processing system, the fixing device, to be included：Heating roller, for providing corresponding temperature when medium is fixed；Thermoelectric conversion element, positioned at the heating roller side to absorb the heat of the heating roller and carry out the conversion of thermal energy and electric energy；Electrical storage device, for storing the electric energy of the thermoelectric conversion element conversion；Charge and discharge electrical switching circuit, for controlling the electrical storage device to discharge the thermoelectric conversion element.The utility model can shorten the stand-by period during switching from non-colour killing toner printing mode to colour killing toner printing mode by thermoelectric conversion element, improve convenience.

Description

Fixing device and image processing system

Technical field

Image formation field is the utility model is related to, high temperature is changed to low temperature when can reduce fixing more particularly to one kind The fixing device of time, and the image processing system using the fixing device.

Background technology

Existing office space, is to use a set of image processing system (MFP mostly：Multi-Functional Peripheral) to be acted as public office equipment, image processing system by following steps：Original copy feedway is used In putting or conveying original copy, scanning element obtains the optical analog picture signal of original copy by exposing, and sends to image shape Into unit, image formation unit makes optical analog picture signal form electrostatic latent image on photographic department surface, recycles transfer section to make Electrostatic latent image is transferred on the medium by paper feed output after forming toner image, then medium is determined by fixation unit Movie queen is discharged to paper discharge unit.

In toner used in conventional images forming apparatus, including can not colour killing and can be two kinds of colour killing, wherein, can disappear Color toner needs the first temperature to be fixed on medium, and the toner that will be had been fixed at the second temperature higher than the first temperature Image colour killing.And can not the toner of colour killing use and be fixed higher than the 3rd temperature of the first temperature.Work as image processing system Fixing device possess can colour killing function when, using the 3rd temperature carry out it is fixing after, reuse can colour killing toner be fixed When, it is necessary to when the temperature of fixation unit drops to the first temperature from the 3rd temperature, temperature fall time is longer, influences Fixing efficiency.

Utility model content

The purpose of this utility model is to provide a kind of fixing device of high temperature when can reduce fixing to low temperature conversion time, And the image processing system using the fixing device.

Specifically, the utility model provides a kind of fixing device, including：

Heating roller, for providing corresponding temperature when medium is fixed；

Thermoelectric conversion element, positioned at the heating roller side to absorb the heat of the heating roller and carry out thermal energy and electric energy Conversion；

Electrical storage device, for storing the electric energy of the thermoelectric conversion element conversion；

Charge and discharge electrical switching circuit, for controlling the electrical storage device to discharge the thermoelectric conversion element.

A kind of image processing system is provided in an embodiment of the utility model, including：

Original copy feedway, for conveying original copy；

Scanning element, scan manuscript is to obtain optical analog picture signal；

Image forming part, the optical analog picture signal is changed to forming toner image on photographic department；

Transfer section, output after the toner image that will be formed on the photographic department is transferred on medium；

Fixing device, for being fixed to the medium for having transferred toner image, including：

Heating roller, for providing corresponding temperature when medium is fixed；

Thermoelectric conversion element, positioned at the heating roller side to absorb the heat of the heating roller and carry out thermal energy and electric energy Conversion；

Electrical storage device, for storing the electric energy of the thermoelectric conversion element conversion；

Charge and discharge electrical switching circuit, for controlling the electrical storage device to discharge the thermoelectric conversion element.

The utility model can be shortened from non-colour killing toner printing mode to colour killing toner by thermoelectric conversion element The stand-by period during switching of printing mode, improves convenience.

Brief description of the drawings

Fig. 1 is the image processing system structure diagram of one embodiment of the utility model；

Fig. 2 is the medium conveying apparatus structure diagram of one embodiment of the utility model；

Fig. 3 is the structure diagram of the thermoelectric conversion element of one embodiment of the utility model.

Embodiment

Hereinafter, the image processing system that embodiment is related to is described in detail with reference made to the accompanying drawings.In addition, same place in each figure Marked with same symbol.

Fig. 1 is the image processing system structure diagram of one embodiment of the utility model.

In Fig. 1, image processing system 100 can be the MFP (Multi-Function as compounding machine Peripherals), the equipment such as printer or duplicator.Illustrated in the following description by taking MFP as an example.

MFP 100 includes a body 11 for being used to install each component, and conveying original copy is provided with the top of body 11 Original copy feedway 12 and operation panel 13.Operation panel 13 includes the operation portion 14 that is made of various keys and touch plate type Display unit 15.

The scanning element 16 for reading original copy is provided with the lower part of original copy feedway 12, scanning element 16 is printed by light Head is exposed to obtain the optical analog picture signal of original copy.Image formation unit 17 is also equipped with body 11 and is accommodated each The paper feed that multiple paper feeding cassettes 18 of kind size medium are formed.

Image formation unit 17 includes providing yellow (Y), magenta (M), cyan (C), the tone of black (K) a variety of colors Agent box 28 (28Y, 28M, 28C, 28K), and the photographic department according to the optical analog picture signal of scanning element 16 generation image 20Y, 20M, 20C, 20K, and the transfer by the image primary transfer on photographic department 20Y, 20M, 20C, 20K to transfer belt 21 Portion.The cleaning unit of residual toner in cleaning photosensitive drums is installed at photographic department 20Y, 20M, 20C, 20K.Each photographic department Be provided with a photosensitive drums, cleaning unit, which generally comprises, is arranged on the upward doctor blade of photosensitive drum shaft and cleaning knife, doctor blade and Cleaning knife can be cleared up the remaining toner of photosensitive drum surface when photosensitive drums rotate.

Transfer belt 21 is erected on driven roller 32 and driven voller 33,34, and driven roller 32 is opposite with secondary transfer roller 35 to match somebody with somebody Put.When medium S is by between driven roller 32 and secondary transfer roller 35, secondary transfer roller 35 applies transfer voltage by transfer belt 21 Toner image be transferred on medium S.Toner in cleaning transfer belt 21 is provided near the driven voller 34 of transfer belt 21 Cleaner 36.

In paper feed between secondary transfer roller 35, equipped with the separate roller 37 for taking out the medium S in paper feeding cassette 18 and pass Roller 38 is sent, the fixing device 39 being fixed to medium S epigraphs is provided with the downstream of secondary transfer roller 35.In fixing device 39 Downstream is provided with the transfer roller 40 for discharging medium S to paper discharge unit 41.

Further, two-sided transmitting path 42 can also be set in the downstream of fixation unit device.Two-sided transmitting path 42 makes Medium S inverts backward 35 direction of secondary transfer roller guiding, to carry out printed on both sides to medium S.

As shown in Figure 2,3, a kind of fixing device 39, the fixing device are provided in an embodiment of the utility model 39 general structure is as follows：Including the endless belt-shaped fixing band with pumped (conveying) medium S, backer roll and tensioning in fixing band Roller, is arranged on the outside of fixing band to be adjacent to and heat the heating roller 391 of fixing band.

Idler roller and backer roll are used to be tensioned fixing band, form the middle part of fixing band and the heating roller 391 in outside The state being adjacent to, heating roller 391 are used to provide corresponding temperature when medium is fixed.

Thermoelectric conversion element 50 is provided with 391 side of heating roller, thermoelectric conversion element 50 is used to absorb heating roller 391 Heat and the conversion for carrying out thermal energy and electric energy.Thermoelectric conversion element 50 is also associated with the electrical storage device 52 of electric energy after storage conversion, The charge and discharge electrical switching circuit 51 to work with control electrical storage device 52 and thermoelectric conversion element 50.

During work, when heating roller 391 using the 3rd temperature on medium S can not the toner image of colour killing be fixed Afterwards, be stopped or need to possess can the medium S of colour killing image carry out fixing or colour killing, then can pass through charge and discharge control Circuit 51 controls electrical storage device 52 to discharge thermoelectric conversion element 50, so that thermoelectric conversion element 50 itself keeps temperature Balance, then absorbs the heat on heating roller 391 using its temperature difference between heating roller 391, makes heating roller 391 as early as possible It is down to room temperature or is down to the first temperature.

Present embodiment can be shortened from non-colour killing toner printing mode to colour killing toner by thermoelectric conversion element The stand-by period during switching of printing mode, improves convenience.

Electrical storage device 51 can absorb thermal energy when heating roller 391 works, and be then converted to electric energy storage and be placed on electrical storage device In 51, and inversely converted again in 391 conversion work temperature of heating roller, electric energy is converted into thermal energy to accelerate heating roller 391 cooling rate.

In present embodiment, electrical storage device 51 can be storage battery.Charge-discharge control circuit 52 can be formed by image The control unit of device 100 controls the course of work.

Thermoelectric conversion element 50 is worked according to Seebeck principle, is internally provided with N-type semiconductor 503 and p-type is partly led Body 504.One end of N-type semiconductor 503 and P-type semiconductor 504 is connected by excellence conductor copper, the other end then respectively with copper Conductor connects, and forms a PN junction, obtains a simple thermoelectric conversion component.Two opposite flanks of thermoelectric conversion element 50 Heating roller 391 can be come close to or in contact with respectively as heat-absorbent surface 501 and radiating surface 502, heat-absorbent surface 501.

The hot-cast socket absorbed from heat-absorbent surface 501 can be electric power when not receiving power supply by thermoelectric conversion element 50 Store to storage battery, when power supply for receiving storage battery converts electrical energy into thermal energy and cut with cooling down between heat-absorbent surface 501 Change.In thermoelectric conversion element 50 electric current along the electronics of the hole of P-type semiconductor element 504 and N-type semiconductor element 503 respectively from The mode that the direction of the lateral low temperature side movement of high temperature is flowed through produces voltage, and the thermal energy of absorption is converted to electric energy and is generated electricity.That is, Generated electricity by the heat of heating roller 391.

In addition, when the electric current in the direction identical with during power generation is flowed from P-type semiconductor element 504 to N-type semiconductor element 503 Cross, with this, supply DC voltage externally to thermoelectric conversion element 50, temperature is produced between heat-absorbent surface 501 and radiating surface 502 Difference, 501 side of heat-absorbent surface are cooled, the fever of 502 side of radiating surface.That is, DC voltage is applied by thermoelectric conversion element 50, can be with Cool down heat-absorbent surface 501.

In addition, for convenience of heat is absorbed, thermoelectric conversion element 50 can be with long rectangle with heating roller 391.

Although the description of the several embodiments of the utility model, but these embodiments are intended only as example and propose , it is not intended to limit the scope of the utility model.These new embodiments, can be implemented in a manner of other are various, In the range of the main idea of utility model is not departed from, various omissions, displacement, combination and change can be carried out.These embodiments All it is contained in the scope of the utility model and main idea with its deformation, and it is new to be contained in this practicality described in claims In type and its equivalency range.

Claims (10)

1. fixing device, it is characterised in that including：

Heating roller, for providing corresponding temperature when medium is fixed；

Thermoelectric conversion element, positioned at the heating roller side to absorb the heat of the heating roller and carry out turning for thermal energy and electric energy Change；

Electrical storage device, for storing the electric energy of the thermoelectric conversion element conversion；

Charge and discharge electrical switching circuit, for controlling the electrical storage device to discharge the thermoelectric conversion element.

2. fixing device according to claim 1, it is characterised in that

The electrical storage device is storage battery.

3. fixing device according to claim 1, it is characterised in that

There is the N-type semiconductor and P-type semiconductor set according to Seebeck effect in the thermoelectric conversion element.

4. fixing device according to claim 3, it is characterised in that

The thermoelectric conversion element is rectangle.

5. fixing device according to claim 4, it is characterised in that

The thermoelectric conversion element includes the heat-absorbent surface and radiating surface that are disposed opposite to each other, the thermoelectric conversion element by heat-absorbent surface with One side contacts of the heating roller.

A kind of 6. image processing system, it is characterised in that including：

Original copy feedway, for conveying original copy；

Scanning element, scan manuscript is to obtain optical analog picture signal；

Image forming part, the optical analog picture signal is changed to forming toner image on photographic department；

Transfer section, output after the toner image that will be formed on the photographic department is transferred on medium；

Fixing device, for being fixed to the medium for having transferred toner image, including：

Heating roller, for providing corresponding temperature when medium is fixed；

Thermoelectric conversion element, positioned at the heating roller side to absorb the heat of the heating roller and carry out turning for thermal energy and electric energy Change；

Electrical storage device, for storing the electric energy of the thermoelectric conversion element conversion；

Charge and discharge electrical switching circuit, for controlling the electrical storage device to discharge the thermoelectric conversion element.

7. image processing system according to claim 6, it is characterised in that

The electrical storage device is storage battery.

8. image processing system according to claim 6, it is characterised in that

There is the N-type semiconductor and P-type semiconductor set according to Seebeck effect in the thermoelectric conversion element.

9. image processing system according to claim 8, it is characterised in that

The thermoelectric conversion element is rectangle.

10. image processing system according to claim 9, it is characterised in that

The thermoelectric conversion element includes the heat-absorbent surface and radiating surface that are disposed opposite to each other, the thermoelectric conversion element by heat-absorbent surface with One side contacts of the heating roller.