JPH04147865A - Ink jet recording apparatus - Google Patents

Abstract

PURPOSE:To always stably emit ink even after standing with the cap open and to eliminate the wasteful consumption of the ink by controlling the opening condition of emission recovery operation carried out at the ON-time of a power supply by an emission recovery means corresponding to the cap opening and closing state detected at the ON-time of the power supply by a detection means. CONSTITUTION:When a power supply is turned ON, the opening and closing state of a cap 8 is detected by a cap state detection circuit 109. When the cap 8 is judged to be in an open state, a cap driving circuit 107 is driven to close the cap 8 and a recording head 11 and the ink an emitting orifice are heated by a heater 28. When the temp. of the recording head 11 is judged to be 30 deg.C or higher, emission recovery operation is performed and ink having a higher viscosity which mag exert adverse effect on the emitting orifice is sucked from the emitting orifice of the recording head 11 through the suction tube connected to a suction pump 29 in such a state that the cap 8 is closed. When the cap 8 is in an open state at the ON-time of a power supply, the temp. of the ink is raised as compared with that at the time of the closed state of the cap 8 and the ink is easily sucked and the recovery of emission can be perfectly carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an ink jet recording apparatus that performs an ejection recovery process to prevent and recover from clogging, ink ejection failure, etc. in the ink ejection ports of a print head.

[Conventional technology]

Inkjet recording devices perform recording by ejecting ink droplets from multiple ink ejection ports of an inkjet recording head onto a recording medium such as recording paper based on recording information. It has a wide range of uses such as fax and facsimile.

Further, by using a plurality of recording heads corresponding to plural colors of ink, full-color recording is possible, and it is also used in color copying machines and the like.

Furthermore, inkjet recording devices also enable high-speed, high-definition recording and large-screen recording.

FIG. 10 is a schematic perspective view showing the configuration of a main part of a serial scanning type color inkjet recording apparatus that performs an ejection recovery process to prevent and recover from clogging and ink ejection failure in the ink ejection orifices of the print head.

A recording head IIY that discharges ink of color ink Y.

A recording head IIM that discharges magenta M color ink.

A recording head IIC for ejecting cyan C ink and a recording head IIK for ejecting black ink are installed on the carriage 12. The carriage 12 moves left and right along a guide shaft 13. The recording paper 14 is
It is kept horizontal to the ink ejection orifice surface of the recording head by conveyance rollers 15, 16 and a platen row (not shown).

The ejection timing of the magenta ink Y1 is outputted by a control circuit (not shown) based on a read signal from the encoder 17.

The cap member 8 attached to the home position of the carriage 12 is made of an air-impermeable, elastic material, and seals the ejection port of the print head when printing is not performed. Prevents ink ejection ports from clogging due to sticking or adhesion of dust.

In addition, at this cap position, you can perform idle ejection (also called preliminary ejection) to prevent clogging of the ejection ports that are used infrequently during printing, or perform suction operation using a pump (not shown) with the cap in place. The ink rotation operation is performed by
Ejection recovery can be performed to recover a clogged ejection port or remove air bubbles within the ejection port.

Cleaning wiper 1 attached to holder 18
Reference numeral 9 is made of a plate-shaped elastic body such as urethane rubber, and is used to remove impurities such as ink and dust stuck or adhered to the vicinity of the ink discharge port from the ink discharge port surface. This cleaning wiper 19 can be moved back and forth together with the holder 18 by a driving means (not shown).
If necessary, a cleaning wiper 19 can be applied to the discharge port surface to perform a cleaning operation while the carriage moves.

[Problem to be solved by the invention]

However, in conventional inkjet recording devices of this kind, if the device is turned off before the cap completely seals the ejection ports of the printhead, and the device is used again after being left unused for a long period of time, the ejection of the printhead may There has been a problem in that the viscosity of the ink in the mouth increases due to water evaporation, making ink ejection unstable and deteriorating print quality.

Note that some devices automatically perform an ejection recovery operation by suctioning ink from the ejection ports each time the device power is turned on. In this case, it is assumed that the cap seals the ejection port of the print head when the device power is turned on, so if the viscosity of the ink increases extremely by opening the cap, the normal In the ejection recovery operation, there remained a problem that the ink within the ejection ports did not flow.

Furthermore, when the device power is turned off, there are some devices in which the power is turned off after the ejection port is completely sealed with the cap according to the power-off sequence. However, the control is complicated and expensive, and the sequence does not operate if the power supply is turned off using a device other than the device power switch.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an inkjet recording device that can always eject stable ink even after being left unused with the cap open, and can eliminate wasteful consumption of ink. shall be.

[Means to solve the problem]

In order to solve the above-mentioned problems, an inkjet recording apparatus of the present invention includes a recording head that has an ejection port that ejects ink and performs recording by ejecting ink onto a recording medium, and an ejection head of this recording head. comprising: a cap means that opens and closes with respect to the inside of the mouth to cover the ejection opening; an ejection recovery means capable of suctioning ink within the ejection opening of the recording head; and a detection means that detects an open/closed state of the cap means; The apparatus is characterized in that, when the power is turned on, operating conditions for the ejection recovery operation performed by the ejection recovery means when the power is turned on are controlled in accordance with the open/closed state of the cap detected by the detection means.

[Effect]

According to the present invention, since the ejection recovery operation when the power is turned on is performed according to the open/closed state of the cap means when the power is turned on, ejection failures due to ink thickening and sticking at the ink ejection ports of the recording head are eliminated and the ejection is always performed. It becomes possible to perform good image recording.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

(First Embodiment) FIG. 1 is a block diagram showing an example of the configuration of a control system in a first embodiment of the present invention. Here, 100 is a control circuit that controls each part, and a CP that executes processing means to be described later.
U90, ROM91 that stores programs and other fixed data corresponding to the processing procedure, RAM for calculations, etc.
92, and a timer 93 for measuring various times.

101 is a conveyance unit for conveying the recording medium in the sub-scanning direction by the platen roller 26; 102 is a carriage 12;
103 is a head driver for driving the electric-thermal energy conversion element of the print head 11; 104 is a head driver for driving the electric-thermal energy conversion element of the print head 11; and 104 controls the temperature of the print head based on the output value from the thermistor 27 provided on the print head. A temperature detection circuit 105 detects a temperature, and a heating circuit 106 controls a heat insulating heater 8 such as a posistar provided on the recording head.
107 is a pump drive circuit for driving the pump 29;
109 is a cap drive circuit that moves the cap member 8 to bring it into contact with/detach from the recording head 11; 108 is a cleaning wiper drive circuit that moves the cleaning wiper 19 to bring it into contact with/detach from the recording head 11; 109; is a cap state detection circuit that detects the open/closed state of the cap.

FIG. 2 is a flowchart showing an example of a sequence for controlling the operating conditions of the ejection recovery means of the inkjet recording apparatus according to an embodiment of the present invention.

First, when the power is turned on in step 5101, the open/closed state of the cap 8 is detected by the cap state detection circuit 109 in step 5102. If it is determined in step 5103 that the cap 8 is in the open state, step 5
106 drives the cap drive circuit 107 to drive the cap 8.
Close. In step 5107, the ink in the print head and the ejection ports is heated by the insulating heater 8 provided on the print head. In step 3108, the print head temperature is detected using the thermistor 27, and in step 5ilo it is determined whether the print head temperature is 45° C. or higher. Step 5
If the print head temperature is less than 45° C. in step 110, the operations from step 5107 to step 5IIO are repeated. If it is determined in step 5110 that the temperature of the print head is 45° C. or higher, the process advances to step 5ill.

If it is determined in step 5103 that the cap 8 is closed, the process advances to step 5104 and the recording head is heated. In step 5105, the print head temperature is detected,
Steps 5104 to 5109 are repeated until it is determined in step 5109 that the temperature of the recording head is 30° C. or higher. If it is determined in step 5109 that the print head temperature is 30° C. or higher, an ejection recovery operation is performed in step 5ill.

Here, the ejection recovery operation refers to an operation of sucking out ink whose viscosity increases and adversely affects ejection from the ejection port of the recording head via a suction tube connected to the suction pump 29 with the cap 8 closed.

Here, FIG. 3 shows the relationship between ink temperature and viscosity. It can be seen from the figure that as the temperature of the ink increases, the viscosity decreases.

If the cap 8 is left open, the viscosity of the ink will be higher than normal due to evaporation of water in the ink, so the ink inside the print head's ejection ports will not flow if the ejection is restored or operated. By raising the head temperature to increase the ink temperature and lowering the ink viscosity, it becomes possible to quickly suck ink from the ejection port.

Therefore, when the cap 8 is in the open state at power supply 08, the temperature of the ink is raised more than when it is in the closed state.
Since ink is easily suctioned, ejection recovery can be completed completely.

After the ejection recovery operation, the cap 8 is opened in step 5112, and the recording standby state is entered. In step 5113, a counter is reset to 0 to measure the non-recording time when the cap 8 is in the open state, and in step Sl14, it is determined whether data for one scan has been received.

The recording head used in this example has 360 pixels per inch.
It can perform recording at a density of dots (360 dpi) and has 64 ejection ports. Therefore, when 64 rasters of image data are received, scanning recording is performed. When image data for 64 rasters is received in step 5114, image recording for one scan is performed in step 5115.

If it is determined in step 5114 that 64 rasters of image data have not been received, 1 is added to the counter in step 5116. If the counter value is less than 5 in step 5117, the process returns to step 5114, but if the counter value is 5 or more, the cap 8 is closed in step 5118, and the reception of data for one scan record is stopped in step 5119. wait. On the other hand, when data for one scanning recording is received in step Sl19, the cap is opened in step 5120 and image recording is performed.

Note that here steps 8114 to 8116 are 1
Since it is controlled to be executed once every second, when the counter value is 5, that is, the non-recording state continues for 5 seconds, the cap 8 is closed in step Sl18.

(Second example) Next, a second embodiment of the present invention will be described.

In this embodiment, the insulating temperature of the recording head and the contents of the ejection recovery operation are changed depending on whether the cap is open or closed when the power source is 08.

FIG. 4 is a flowchart showing an example of a sequence for controlling the operating conditions of the ejection recovery process of the inkjet recording apparatus in this embodiment.

First, when the power is turned on in step 5201, the open/closed state of the cap 8 is detected in step 5202.

When it is determined in step 5203 that the cap is open, the cap 8 is closed in step 5210, and in step 5211, the ink in the print head and the ejection ports is heated by the insulating heater 28 provided on the print head.

The print head temperature is detected in step 5212, and it is determined in step 5213 whether the print head temperature is 45° C. or higher.

If the print head temperature is less than 45° C. in step 5213, the operations from steps 5211 to 5213 are repeated. In step 5213, the recording head temperature is 45°C.
In the above case, in step 5214, a discharge recovery operation (2) to be described later is performed.

If it is determined in step 5203 that the cap 8 is closed, the ink in the print head and the ejection ports is heated in step 5204 by the insulating heater 28 provided on the print head. The print head temperature is detected in step 5205, and it is determined in step 8206 whether the print head temperature is 30° C. or higher. If the print head temperature is less than 30°C in step 5206, steps 5204 to 5206
The operations up to this point are repeated.

If the recording head temperature is 30° C. or higher in step 5206, then in step 5207 an ejection recovery operation (2) to be described later is performed.

After the ejection recovery operation, the cap 8 is opened in step 8208, and the recording standby state is entered.

Steps 5209 and steps 5215 to 5221 are similar to steps 5113 to 5120 in FIG. 2 in the previous embodiment, so their explanation will be omitted.

Here, FIG. 5 shows a configuration diagram of the suction pump used in this embodiment.

In the figure, 1 is an O-ring for shielding, 2 is a piston, 3 is an outer wall of the pump, 4 is a spring that returns the depressed piston, 5 is a suction port, 6 is a discharge port, 7 is a suction tube, 8 is a cap, 9 is a waste liquid tube, and 10 is a valve.

By pushing down the piston 2 in the direction of arrow A by a drive circuit (not shown), ink can be sucked from the ejection opening of the recording head through the cap 8 that is in close contact with it.

FIG. 6 is a diagram showing the pressure generated within the cap by the suction pump.

■ is the discharge recovery operation in step 5207 in Fig. 4■
Similarly, (2) is the pressure change when the discharge recovery operation (2) in step 5214 is performed. 300 mm during suction during discharge recovery operation ■
In contrast to the negative pressure of Hg, the discharge recovery operation ■ is 6
Ink suction is performed more strongly with a negative pressure of 00 mmHg.

In the above discharge recovery operations (1) and (2), it is possible to change the amount of negative pressure generated during suction by changing the stroke amount for pushing down the piston 2 of the suction pump shown in FIG.

If the cap is left open, the ink whose viscosity has increased due to water evaporation will be heated to lower the viscosity, and powerful suction will be used to recover the ejection, thereby ensuring negative effects on ejection. You can suck out the ink that gives you.

In addition, the time for which the piston 2 of the suction pump is pushed down and held is extended to increase the period of negative pressure generation as shown in Figure 7, or the number of times the piston 2 is pushed down is increased to create a negative pressure as shown in Figure 8. The same effect as above can be obtained by increasing the number of times pressure is generated.

(Third example) Next, a third embodiment of the present invention will be described.

In this embodiment, in addition to the opening/closing state of the cap when the power is turned on, the content of the ejection recovery operation as well as the recording head's insulating temperature are changed depending on the holding time in the open state.

FIG. 9 is a flowchart showing an example of a sequence for controlling the operating conditions of the ejection recovery process of the inkjet recording apparatus in this embodiment.

First, when the power is turned on in step 5301, the open/closed state of the cap is detected in step 5302.

If it is determined in step 5303 that the cap 8 is closed, the ink in the print head and the ejection ports is heated in step 5304 by the insulating heater 28 provided on the print head. The print head temperature is detected in step 5305, and it is determined in step 8306 whether the print head temperature is 30° C. or higher. If the print head temperature is less than 30°C in step 5308, steps 5304 to 5306
The operations up to this point are repeated.

If the recording head temperature is 30° C. or higher in step 5306, the ejection recovery operation (2) is performed in step 5307, the cap 8 is opened in step 3318, and the recording standby state is entered.

On the other hand, if it is determined in step 5303 that the cap 8 is open, the cap 8 is closed in step 8308, and in step 5309 the timer 9 built into the device is activated.
Read the value of. This timer 93 starts operating when the power of the device is turned off, and stops at the same time as the power is turned on. The power source for the timer is a rechargeable battery, and the power supply for the main unit is OFF.
Charged when in N state.

If the timer operating time is less than 24 hours in step 5310, then in step 5311 the ink in the print head and the ejection ports is heated by the insulating heater 28 provided on the print head. The print head temperature is detected in step 5312, and it is determined in step 5313 whether the print head temperature is 45° C. or higher. If the recording head temperature is less than 45°C in step 5313, steps 5311 to 531
The operations up to step 3 are repeated.

If the print head temperature is 45° C. or higher in step 5313, the ejection recovery operation (2) is performed in step 5307, and the process proceeds to step 5318.

If the timer operating time is 24 hours or more in step 531O, the print head and the ink in the ejection ports are heated in step 5314, the print head temperature is detected in step 5315, and the print head temperature is set to 45 in step 5316.
If the temperature is less than 0.degree. C., steps 5314 to 5316 are repeated.

If the recording head temperature is 45° C. or higher in step 5316, the ejection recovery operation (2) is performed in step 5317, and the process proceeds to step 5318.

Hereinafter, steps 8319 to 5326 are the same operations as steps Sl 13 to 5120 in FIG. 2 and steps 5209 and 5215 to 221 in FIG. 4 in the previous embodiment, so their explanation will be omitted.

As explained in the previous embodiment, the ejection recovery operation is performed by changing the ink suction pressure, the ink suction holding time, and the number of ejection recovery operations, so that the ejection recovery operation ■ performed in step 5317 is more effective than the ejection recovery operation ■ performed in step 5307. The more powerful the ink can be sucked from the ejection port.

In this embodiment, the content of the ejection recovery operation is changed depending on the open/closed state of the cap when the power is turned on, as well as the time the cap 8 is held in the open state, so it is possible to perform more appropriate ejection recovery processing. Become.

The present invention particularly relates to a bubble jet recording head proposed by Canon Co., Ltd. among inkjet recording systems.
This provides excellent effects in recording devices.

As for typical configurations and principles thereof, it is preferable to use the basic principles disclosed in, for example, US Pat. No. 4,723,129 and US Pat. No. 4,740,796. This method can be applied to both the so-called on-demand type and continuous type, but especially in the case of the on-demand type, it is necessary to arrange the liquid (ink) in accordance with the sheet and liquid path that hold it. By applying at least one drive signal that corresponds to recorded information and causes a rapid temperature rise exceeding nucleate boiling to the electrothermal transducer, the electrothermal transducer generates thermal energy, and the recording head This is effective because it causes film boiling on the heat acting surface of the liquid (ink), resulting in the formation of bubbles in the liquid (ink) in one-to-one correspondence with this drive signal. The growth and contraction of this bubble causes the liquid (ink) to be ejected through the ejection opening to form a small (at least one) drop.If this drive signal is in the form of a pulse, the growth and contraction of the bubble will occur immediately and appropriately. This is more preferable since liquid (ink) ejection with particularly excellent responsiveness can be achieved.This pulse-shaped drive signal is described in U.S. Pat. Nos. 4,463,359 and 4,345,262. The above-mentioned U.S. Pat.
If the conditions described in the specification of No. 13124 are adopted, even more excellent recording can be performed.

The configuration of the recording head includes, in addition to the combined configuration of ejection ports, liquid paths, and electrothermal converters (straight liquid flow path or right-angled liquid flow path) as disclosed in the above-mentioned specifications, a heat acting section. US Pat. No. 4,558,333 and US Pat. No. 4,459,600 disclose a configuration in which the
The present invention also includes a configuration using the specification of the above specification.

In addition, Japanese Patent Application Laid-Open No. 123670 of 1981 discloses a configuration in which a common slit is used as a discharge part of a plurality of electrothermal converters, and an opening that absorbs pressure waves of thermal energy is disclosed. The present invention is also effective as a configuration based on Japanese Patent Application Laid-Open No. 138461 of 1982, which discloses a configuration corresponding to the discharge section.

Furthermore, as a full-line type recording head having a length corresponding to the width of the maximum recording medium that can be recorded by the recording device, the length can be increased by combining multiple recording heads as disclosed in the above-mentioned specification. Either a configuration that satisfies the above requirements or a configuration as a single recording head formed integrally may be used, but the present invention can more effectively exhibit the above-mentioned effects.

In addition, a replaceable chip-type recording head that is attached to the device body enables electrical connection to the device body and ink supply from the device body, or a chip-type recording head that is installed integrally with the recording head itself. The present invention is also effective when the recording head is used in a cartridge type.

Further, it is preferable to add recovery means, preliminary auxiliary means, etc. for the recording head, which are provided as a configuration of the recording apparatus of the present invention, because the effects of the present invention can be further stabilized. Specifically, these include cabining means for the recording head, cleaning means, pressurizing or suction means, preheating means using an electrothermal transducer or another heating element, or a combination thereof; It is also effective to perform a preliminary ejection mode in which ejection is performed separately from printing in order to perform stable printing.

Furthermore, the recording mode of the recording device is not limited to a recording mode in which only the mainstream color such as black is used, but it is also possible to configure the recording head in one piece or in a combination of two or more, but it is also possible to print in multiple colors of different colors or by mixing colors. The present invention is also extremely effective for devices equipped with at least one full color image.

In the embodiments of the present invention described above, the ink is explained as a liquid, but it is an ink that solidifies at room temperature or lower, and is softened or liquid at room temperature, or in the above-mentioned inkjet, the ink itself is heated at 30°C or higher. Since the temperature is generally controlled within a range of 70° C. or less so that the viscosity of the ink is within the stable ejection range, it is sufficient that the ink is in a liquid state when the recording signal is applied. In addition, it is possible to actively prevent temperature rise due to thermal energy by using it as energy to transform the ink from a solid state to a liquid state, or to use ink that solidifies when left in order to prevent ink evaporation. Iruka,
In any case, the property of liquefying only by thermal energy, such as ink that is liquefied by application of thermal energy in accordance with a recording signal and ejected as liquid ink, or that has already begun to solidify by the time it reaches the recording medium. The use of ink is also applicable to the present invention. In such a case, the ink is held as a liquid or solid substance in the recesses or through-holes of a porous sheet as described in JP-A-54-56847 or JP-A-60-71260. It may also be in a form that faces the electrothermal converter. In the present invention, the most effective method for each of the above-mentioned inks is to implement the above-mentioned film boiling method.

Furthermore, in addition to being used as an image output terminal for information processing equipment such as a computer, the inkjet recording device of the present invention may take the form of a copying device combined with a reader or the like, or even a facsimile device having a sending/receiving function. It may be something.

FIG. 11 is a block diagram showing a schematic configuration when the recording apparatus of the present invention is applied to an information processing apparatus having functions as a word processor, a personal computer, a facsimile machine, and a copying apparatus.

In the figure, 201 is a control unit that controls the entire device, and is equipped with a CPU such as a microprocessor and various I10 ports.
Control is performed by outputting control signals, data signals, etc. to each part, and inputting control signals and data signals from each part. Reference numeral 2 denotes a display unit, on which various menus, document information, image data read by the image reader 207, etc. are displayed. Reference numeral 203 denotes a transparent pressure-sensitive touch panel provided on the display section 202, and by pressing the surface with a finger or the like, it is possible to input items, coordinate positions, etc. on the display section 202.

204 is FM (Frequency Modula
tion) In the sound source section, music information created by a music editor or the like is stored as digital data in the memory section 210 or external storage device 212, and is read out from the memory or the like and subjected to FM modulation. The electrical signal from the FM sound source section 204 is converted into audible sound by the speaker section 205. The printer unit 206 is an output terminal for a word processor, a personal computer, a facsimile machine, or a copying machine, to which the storage device of the present invention is applied.

207 is an image reader unit that photoelectrically reads and inputs document data, and is provided in the middle of the document conveyance path;
It reads facsimile originals, copy originals, and various other originals. Reference numeral 208 denotes a facsimile (FAX) transmitting/receiving unit which transmits the document data read by the image reader unit or 207 by facsimile, and receives and decodes the sent facsimile signal, and has an interface function with the outside. A telephone section 209 has various telephone functions such as a normal telephone function and an answering machine function.

210 is a ROM that stores system programs, manager programs, other application programs, etc., character fonts, dictionaries, etc., and an external storage wave [210].
This is a memory section that includes application programs and document information loaded from 12, as well as a video RAM and the like.

Reference numeral 211 is a keyboard unit for inputting document information, various commands, etc.

The external storage device 212 is an external storage device that uses a floppy disk, hard disk, or the like as a storage medium, and this external storage device 212 stores document information, music or audio information, user application programs, and the like.

FIG. 12 is an external view of the information processing apparatus shown in FIG. 11.

In the figure, 301 is a flat panel display using liquid crystal or the like, which displays various menus, graphic information, document information, etc. A touch panel 203 is installed on the display 301, and by pressing the surface of the touch panel 203 with a finger or the like, it is possible to input coordinates or specify an item. 302 is a handset used when the device functions as a telephone. A keyboard 303 is removably connected to the main body via a cord, and is capable of inputting various document information and various data. Also, this keyboard 303 has various function keys 30.
4th class is provided. 305 is a floppy disk insertion slot into the external storage device 212.

Reference numeral 306 denotes a paper mounting section on which a document to be read by the image reader section 207 is placed, and the read document is discharged from the rear of the apparatus. Further, when receiving a facsimile, the information is recorded by an inkjet printer 307.

Note that although the display unit 202 described above may be a CRT, a flat panel such as a liquid crystal display using ferroelectric liquid crystal is preferable. This is because it can be made smaller, thinner, and lighter.

When the information processing apparatus functions as a personal computer or a word processor, various information input from the keyboard section 211 is processed by the control section 201 according to a predetermined program, and output as an image to the printer section 206.

When functioning as a receiver of a facsimile device, facsimile information input from the FAX transmitting/receiving unit 208 via a communication line is received and processed by the control unit 201 according to a predetermined program, and output as a received image to the printer unit 206.

In addition, when functioning as a copying device, the image reader section 2
07 reads the original, and the read original data is output as a copy image to the printer unit 206 via the control unit 201. Note that when functioning as a transmitter of a facsimile device, the document data read by the image reader section 207 is transmitted through the control section 201 according to a predetermined program, and then transmitted to the communication line via the FAX transceiver section 208. Ru.

Note that the above-described information processing apparatus may be an integrated type in which an inkjet printer is built into the main body as shown in FIG. 13, and in this case, portability can be further enhanced. In the figure, parts having the same functions as those in FIG. 12 are given corresponding symbols.

By applying the recording device of the present invention to the multifunctional information processing device described above, high-quality recorded images can be obtained at high speed and with low noise, so that the functions of the information processing device can be further improved. It becomes possible.

〔Effect of the invention〕

As explained above, according to the present invention, by detecting the open/closed state of the cap when the power is turned on, and further detecting the opening time when the cap is in the open state when the power is turned on, the open/closed state of the cap when the power is turned on is detected. and the opening time when the cap is open, the operating conditions for the ejection recovery operation performed when the power is turned on are controlled by, for example, the insulating temperature of the recording head and ink, the ink suction pressure, the ink suction time, and the number of operations. This eliminates ejection failures due to increased viscosity or sticking of ink at the ink ejection ports of the print head, making it possible to always record good images.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a configuration example of a control system in an embodiment of an inkjet recording apparatus of the present invention, FIG. 2 is a flowchart showing an ejection recovery processing sequence of the first embodiment of the present invention, and FIG. A diagram showing the relationship between ink temperature and viscosity, FIG. 4 is a flowchart showing the ejection recovery processing sequence of the second embodiment of the present invention, and FIG. 5 is a configuration diagram of the suction pump used in the embodiment of the present invention. Figures 6, 7, and 8 are diagrams showing the pressure generated in the cap by the suction pump, Figure 9 is a flowchart showing the discharge recovery processing sequence of the third embodiment of the present invention, and Figure 10 is the serial number. FIG. 11 is a schematic perspective view showing the main structure of a scanning type color inkjet recording device, FIG. 11 is a block diagram showing the schematic structure when the present invention is applied to an information processing device, and FIGS. 12 and 13 are respectively 12 is an external view of the information processing device shown in FIG. 11. FIG. 8... Cap 11... Recording head 27... Thermistor 28... Heater 29... Pump 90... CPU 91... ROM 92... RAM 93... Timer 100... - Control circuit 103...Head driver 104...Head temperature detection circuit 105...Head heating circuit 106...Pump drive circuit 107...Cap drive circuit 109...Cap state detection circuit Ink 1 cliff ( 0C) Eye catching last night sales 1 Kuima Su 51 hours

Claims (7)

[Claims] (1) A recording head that has an ejection port that ejects ink and performs recording by ejecting ink onto a recording medium, and a device that opens and closes with respect to the ejection port of this print head to cover the ejection port. The apparatus comprises: a cap means; an ejection recovery means capable of suctioning ink within an ejection port of the recording head; and a detection means for detecting an open/closed state of the cap means; An inkjet recording apparatus characterized in that the operating conditions of the ejection recovery operation performed by the ejection recovery means when the power is turned on are controlled accordingly. (2) having a timer means for detecting the open time when the cap means is in the open state; and when the cap means is in the open state when the power is turned on, the timer means detects the open time when the cap means is in the open state; 2. The inkjet recording apparatus according to claim 1, wherein operating conditions for an ejection recovery operation performed by said ejection recovery means when turned on are controlled. (3) The inkjet recording apparatus according to claim 1, wherein the control condition for the ejection recovery operation is a keeping temperature of the recording head and ink. (4) The inkjet recording apparatus according to claim 1, wherein the control condition for the ejection recovery operation is an ink suction pressure. (5) The inkjet recording apparatus according to claim (1), wherein the control condition for the ejection recovery operation is an ink suction time. (6) The inkjet recording apparatus according to claim 1, wherein the control condition for the ejection recovery operation is the number of times of the ejection recovery operation. (7) The recording head is provided with a plurality of ejection ports for ejecting ink, and is provided for each corresponding ejection port, causing a state change in the ink due to heat, and ejecting the ink from the ejection port based on the state change. 2. The ink jet recording apparatus according to claim 1, further comprising a thermal energy generating means for forming flying droplets.