JPH02253957A - Liquid jet recording apparatus - Google Patents

Abstract

PURPOSE:To obtain a liquid jet recording apparatus capable of reducing maintenance cost by providing a correction means for correcting the temp. of a recording head on the basis of the temp. in the vicinity of the recording head and the display means relating to the correction operation of said means. CONSTITUTION:In the temp. correction procedure using an MPU 11, the temp. of a recording head 4 is detected by the semiconductor diode 7 mounted in the recording head 4 in a case not immediately after a power supply is closed. When the recording head 4 becomes a state generating no change in the detected temp., the temp. in the vicinity of the recording head 4 is detected by a thermistor B. In a case reaching a state generating no change in the detected temp. after the temp. in the vicinity of the recording head 4 is detected, the value of an A/D converter at the time when the temps. detected by the semiconductor diode 7 and the thermistor 8 become stable is stored and the temp. detected by the semiconductor diode 7 is corrected on the basis of the temp. detected by the thermistor 8. After correction, the flashing of the LED of a temp. correction state/completion display apparatus 12 is stopped to inform the completion of temp. correction and the LED of the temp. correction state/ completion display apparatus 12 is allowed to light to inform the completion of temp. correction processing.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a liquid jet recording device.

[Prior Art] In recent years, a large number of print recording devices have come into use in offices, and the print recording devices used in offices are not only capable of high-speed printing, high resolution, and high print quality. In particular, low noise is required. Liquid jet recording devices are known as devices that meet such demands.

Print heads used in liquid jet recording devices, such as ink jet recording devices, use ink and are therefore greatly affected by temperature. It is no exaggeration to say that this temperature control maintains high print quality.

Recent recording heads are designed to stabilize the temperature during printing. The temperature detection element used is required to have high temperature detection accuracy. Modern printheads have high temperature detection accuracy, so the temperature of the printhead is detected using an expensive temperature detection element, and the drive of the printhead is controlled based on the detected temperature. .

[Problems to be Solved by the Invention] Conventional liquid jet recording devices, such as inkjet recording devices, have a replaceable recording head built-in a temperature detection element with high temperature detection accuracy, which reduces the cost of the recording head. The problem of increased maintenance costs due to the high cost of the temperature detection element has been solved.

In addition, print recording devices that are compatible with color printing and use replaceable recording heads have the problem of further increasing maintenance costs because they use a plurality of recording heads.

SUMMARY OF THE INVENTION An object of the present invention is to provide a liquid jet recording device that can solve the above-mentioned problems and reduce maintenance costs.

[Means for Solving the Problems] In order to achieve such an object, the present invention provides a liquid jet recording apparatus having a replaceable recording head, which includes a first temperature detection element for detecting the temperature of the recording head. a second temperature detection element that detects a temperature near the recording head; and a second temperature detection element that corrects the first temperature detected by the first temperature detection element based on the second temperature detected by the second temperature detection element. The present invention is characterized by comprising a correction means and a display means for displaying a correction operation performed by the correction means.

The present invention also provides a liquid jet recording apparatus having a replaceable recording head, which includes a first temperature detection element that detects the temperature of the recording head, and a second temperature detection element that detects the temperature near the recording head. the second element at a specified temperature.
A second correction means for correcting the detection output of the first temperature detection element based on the detection power Nr of the temperature detection element. Based on the second temperature detected by the second temperature detection element that detects temperature, the first temperature detected by the first temperature detection element that detects the temperature of the recording head is corrected by the first correction means, and the first correction is performed. The display means performs a display related to the correction operation performed by the means.

Further, in the present invention, at a specified temperature, the second correction means adjusts the detection output of the first temperature detection element that detects the temperature of the print head based on the detection output of the second temperature detection element that detects the temperature in the vicinity of the print head. Corrected by

[Embodiments] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a first embodiment of the invention.

In the figure, reference numeral 4 denotes a recording head, which has an ejection opening for ejecting recording liquid and an energy generating element provided corresponding to the ejection opening and generating energy used for ejecting the recording liquid. .

In this example, a heater is provided as an energy generating element,
When the heater generates heat due to the energization, foaming occurs in the recording liquid formed in the groove in the nozzle, and the recording liquid is discharged from the discharge port.

Reference numeral 7 denotes a semiconductor diode as a first temperature detection element, which is built into the recording head 4 and detects the temperature of the recording head 4 using a forward voltage that is dependent on temperature. Reference numeral 9 denotes an amplifier, which amplifies the signal from the semiconductor diode. A specific example of the amplifier 9 is shown in FIG. 2. Reference numeral 8 is a thermistor as a second temperature detection element, which detects the temperature in the vicinity of the recording head 4. 10 is an AD converter,
It converts analog signals from the amplifier 9 and thermistor 8 into digital signals. 11 is the MPU, the first
The correction means corrects the first temperature detected by the semiconductor diode based on the second temperature detected by the thermistor 8.

FIG. 3 shows the positional relationship between the recording head 4 and the thermistor 8.

FIG. 3 (al) is an example in which the thermistor 8 is positioned near the recording head 4 in a non-contact state.

FIG. 3(b) shows an example in which the thermistor 8 is brought into contact with the recording pad 4 by the elastic force of the spring 31. This example is shown in Figure 3(a).
This has the advantage that the thermal resistance is smaller than the example shown in , and the thermal response is improved.

FIG. 3(C) shows an example in which the thermistor 8 is brought into contact with the notch 32 provided in the recording pad 4. FIG. This example is shown in Figure 3 (b
Since the contact is closer to a line contact than the point contact in the example shown in ), the contact area of the thermistor 8 is larger than in the example shown in FIG. 3(b), and there is an advantage that the thermal response is improved.

FIG. 3(d) shows an example in which a thermistor 8 is inserted into a cylindrical hole 33 provided in the recording head 4. This example is shown in Figure 3 (C).
This has the advantage that the contact area of the thermistor 8 is larger than that shown in the example shown in FIG. 2, and the thermal response is improved.

In FIG. 4, 4 indicates the same part as in FIG. 1 is a platen rotatably provided around an axis 2; 3 is a print recording sheet set on the platen 1; 5 is a carriage on which the recording pad 4 is mounted; 6 is a guide for the carriage 5 along the axis 2 of the platen 1. It is a support rod of 1.

FIG. 5 is a flowchart showing an example of the temperature correction procedure by MPIJ 11.

In step S51, it is determined whether or not the power has just been turned on, and as a result of the determination, if it has not been immediately after the power has been turned on, step S55
2, and in step S52, it is determined whether the recording head 4 has just been replaced. As a result of the determination, if it has just been replaced, the process moves to step 553, and in step $53, the temperature of the recording head 4 is detected by the semiconductor diode 7 built in the recording head 4. Then, in step S54, it is determined whether or not there is a change in the detected temperature, and if the result of the determination is that there is a change, step 553
Returning to step S53. Repeat the procedure of S54, and then step 5541. ! As a result of my judgment,
If there is no temperature change, proceed to step S55,
A thermistor 8 detects the temperature near the rad 4 for recording.

After detecting the temperature near the recording head 4, it is determined in step 556 whether or not there is a change in the detected temperature. If there is a change as a result of the determination, the process returns to step S55, and thereafter steps sss, The procedure of ssa is repeated, and if the result of judgment in step 556 is that there is no temperature change, the process moves to step S57, and step 55
7, the temperature detected by the semiconductor diode 7 and thermistor 8.

The value of the AD converter when stabilized is stored, and the temperature detected by the semiconductor diode 7 is corrected based on the temperature detected by the thermistor 8.

Note that if the result of determination in step 551 is that the power has just been turned on, the process moves to step S53.

Further, in step S52, if it is determined that the recording head has just been replaced, the temperature correction is ended.

(Second example) FIG. 6 shows a second embodiment of the invention.

In the figure, 4.7 to 11 indicate the same parts as in Figure 1,
Reference numeral 12 denotes a temperature correction in progress/completion display device as a first display section, which is composed of an LED and blinks during temperature correction and lights up when temperature correction is completed. 1. A host (not shown) that controls the device. A temperature correction processing in progress signal and a temperature correction processing completion signal are sent to the computer through the interface.

FIG. 7 is a flowchart showing an example of the temperature correction procedure by the MPtl 11.

In step 57m, it is determined whether or not the power has just been turned on, and as a result of the judgment, if it is not immediately after the power has been turned on, step $7
2, and in step S72 it is determined whether or not the recording head 4 has just been replaced. If the result of the determination is that it has just been replaced, the process moves to step S73, and in step 573, temperature correction is in progress/completed. The LED of the display device M12 starts blinking to notify the start of temperature correction. And step 74
At step S75, the temperature of the recording head 4 is detected by the semiconductor diode 7 built in the recording head 4.
, it is determined whether there is a change in the detected temperature.

As a result of the judgment, if there is a change, the process returns to step 574, and thereafter the procedures of steps 574 and 575 are repeated.
If the result of determination in step S75 is that there is no temperature change, the process moves to step S76, and the temperature near the recording head 4 is detected by the thermistor 8.

After detecting the temperature near the recording head 4, in step 577,
It is determined whether or not there is a change in the detected temperature, and if there is a change as a result of the determination, the process returns to step 578, and thereafter the procedures of steps 571i and 577 are repeated. As a result, if there is no temperature change, the process moves to step 578, and step 57
At step 8, the value of the AD converter when the temperature detected by the semiconductor diode 7 and thermistor 8 is stabilized is stored, and the temperature detected by the semiconductor diode 7 is corrected to the temperature detected by the thermistor 8.

After the correction, in step 579, the blinking of the LED of the temperature correction in progress/completion display device 12 is stopped to notify the end of temperature correction, and in step SaO, the temperature correction in progress/completion display device 1 is notified.
The LED No. 2 is turned on to notify the completion of temperature correction processing.

Note that if it is determined in step 571 that the power has just been turned on, the process moves to step S73.

Further, in step 572, if it is determined that the recording head has just been replaced, the temperature correction is ended.

In this embodiment, with this configuration, the operator can grasp the operating state of the device.

(Third example) FIG. 8 shows a third embodiment of the invention.

In the figure, 4, 7 to 12 indicate the same parts as in Figure 6,
Reference numeral 13 denotes a temperature correction success/failure display device as a second display section, which is composed of an LED, and lights up when the temperature correction process is successful, and displays the temperature correction value of the semiconductor diode 7 when it fails. It flashes with.

A temperature correction processing success signal and a temperature correction processing failure signal are sent through an interface to a host computer (not shown) that controls this device.

FIG. 9 is a flowchart showing an example of a temperature correction procedure by the MPtl 11.

In step 591, it is determined whether or not the power has just been turned on. If the result of the judgment is that it has not been immediately after the power has been turned on, step 59
2, and in step 592, it is determined whether or not the recording head 4 has just been replaced. If the result of the determination is that it has just been replaced, the process moves to step 593, and in step 593, temperature correction is in progress/completed. The LED of the display device 12 starts blinking to notify the start of temperature correction. And step S9
4, the temperature of the recording head 4 is detected by the semiconductor diode 7 built in the recording head 4, and the temperature of the recording head 4 is detected in step 59.
In step 5, it is determined whether or not there is a change in the detected temperature. If the result of the determination is that there is a change, the process moves to step S96, and in step S96, after a predetermined period of time, the temperature is stabilized. As a result of the judgment, if it is not stable, the process returns to step 594, and thereafter the procedures of steps 594 and S95 and 598 are repeated.
As a result of the determination in step 59B, if the temperature is not stable, the process moves to step $100, and the process proceeds to step 5100.
In step 5101, the temperature detected by the semiconductor diode 7 is corrected, and in step 5101, the LED of the temperature correction success/failure display device 13 is blinked to notify that the temperature correction process of the semiconductor diode 7 has failed. Then, in step 5104, the blinking of the LED of the temperature correction in progress/completion display device 12 is stopped to notify the end of the temperature correction.

On the other hand, if the result of determination in step 595 is that there is no temperature change, the process moves to step 597;
, the temperature near the recording head is detected by the thermistor 8.

After detecting the temperature in the vicinity of the recording head, it is determined in step 598 whether or not there is a change in the detected temperature. If there is a change as a result of the determination, the process moves to step 599. After the time has elapsed, it is determined whether the temperature is stable or not. If the temperature is not stable, the process returns to step S97, and thereafter, step 597.59
8,599 steps are repeated. Then, step S99
As a result of the determination, if the temperature is not stable, the process moves to step 5ioo.

On the other hand, as a result of the determination in step 598, if there is no temperature change, the process moves to step 5102, and the process proceeds to step 510.
2, the value of the An converter when the temperature detected by the semiconductor diode 7 and thermistor 8 is stabilized is stored, and the temperature detected by the semiconductor diode 7 is corrected by the temperature detected by the thermistor 8.

After the correction, in step 5103, the LED of the temperature correction success/failure display device 13 is turned on to notify that the temperature correction process has been successful.

Note that if it is determined in step S91 that the power has just been turned on, the process moves to step S'93.

Further, if the result of determination in step 592 is that the recording head has just been replaced, the process moves to step 5104.

In this embodiment, with this configuration, the operator can grasp the operating state of the device.

(Fourth example) FIG. 10 shows a fourth embodiment of the invention.

In the figure, %4.7 to 13 indicate the same parts as in Figure 8.
Reference numeral 14 denotes a heating device as first and second temperature control means, which heats the vicinity of the recording head 4.

Figure il1 shows the positional relationship among the recording head 4, thermistor 8, and heating device 14.

FIG. 11(a) shows an example in which the heating device 14 is positioned in a non-contact state near the recording head 4 having the positional relationship shown in FIG. 3(a) with the thermistor 8.

FIG. 11(b) shows the heating device 14 connected to the recording head 4 with the thermistor 8 and the spring 11 in the positional relationship shown in FIG. 3(b).
This example is shown in Figure 11 (
Compared to the example shown in a), this has the advantage that the thermal resistance is smaller and the thermal responsiveness is better.

1st! FIG. 3(C) shows an example in which the heating device 5t14 is brought into contact with the notch 212 provided in the recording head 4 in the positional relationship shown in FIG. 3(e) with the thermistor 8.
Since the point contact in the example shown in FIG. 11(b) is closer to a line contact, the contact area of the heating device 14 is larger than in the example shown in FIG. 11(b), and the thermal response is improved. There are advantages.

FIG. 11(d) shows an example in which the heating device 14 is inserted into the cylindrical hole 113 provided in the recording head 4 in the positional relationship shown in FIG. 3(d) with the thermistor 8. Compared to the example shown in (e), this has the advantage that the contact area of the heating device 14 is larger and the thermal responsiveness is improved.

FIG. 12 is a flowchart showing an example of a temperature correction procedure by the MPtl 11.

In step 5121, it is determined whether the power has just been turned on,
As a result of the judgment, if it is not immediately after the power is turned on, proceed to step 5.
122, and in step 5122, the recording head 4
If the result of the judgment is that it has just been replaced, the process moves to step 5123, and step 5
At 123, the LED of the temperature correction in progress/completion display device 12 starts blinking to notify the start of temperature correction.

Then, in step 5124, the temperature of the recording head 4 is detected by the semiconductor diode 7 built into the recording head 4, and in step 5125, it is determined whether the detected temperature is a specified temperature. As a result of the determination, if the temperature is not the specified temperature, the process moves to step 512B, and the process proceeds to step 512.
In step 6, it is determined whether the temperature after a predetermined period of time has passed is stable. If the temperature is not stable, the process moves to step 5127. In step 5127, it is determined whether or not the temperature is higher than the specified temperature. If the determined temperature is not higher than the specified temperature, the heating device is turned on in step 5128, and the process returns to step 5124.
Repeat 24,5125°5128.5127.5128.

Then, in step 5125, as a result of determining whether or not the temperature is the specified temperature, if the temperature is the specified temperature, the process moves to step 5130, and in step 5130, the heating device 14 is turned off.
do. After turning off the heating device 14, step 513
At step 1, the temperature of the recording pad 4 is detected by the semiconductor diode 7, and at step 5132, it is determined whether or not there is a change in the detected temperature. 5133, step 513
In step 3, it is determined whether the temperature is stable after a predetermined period of time has elapsed, and if the temperature is stable as a result of the determination, step 51 is performed.
Return to 24.

In addition, in step 5.126, it is determined whether the temperature after a predetermined period of time has passed is stable, and if the temperature is not stable, the process moves to step 5134, and in step 5134, the heating device 14 is turned off.

After the heating device 14 is turned off in step 5134, the temperature detected by the semiconductor diode 7 is corrected in step 5135, and the temperature detected by the semiconductor diode 7 is displayed on the LED of the temperature correction success/failure display device 13 in step 5136. Displays the temperature correction value and blinks to notify that the correction process has failed. Then, in step 5139, the blinking of LE[l on the temperature correction in progress/completion display device 12 is stopped to notify the end of temperature correction.

Also, steps 5124, 5125, 5126. $12
7. While repeating $128, if the result of judgment in step 5127 is that the temperature is higher than the specified temperature, step 5129
In step 5129, the heating device is turned off.
, return to step 5124.

On the other hand, steps S1.24, 5125, 5130, 51
While repeating steps 31, 5132 and 5133, step 51
As a result of the determination in step 32, if the temperature is not stable, the process moves to step 5137, in which the temperature detected by the semiconductor diode 7 is corrected, and in step 5138, a temperature correction success/failure display device is displayed. 13 L
The ED is turned on to notify the success of the temperature correction process of the semiconductor diode 7. Then, in step 5139, the blinking of the LED of the temperature correction in progress/completion display device 12 is stopped to notify the end of the temperature correction.

Also, steps 5124.5125.5130,513
While repeating 1,5132°5133, step 513
As a result of the determination in step 3, if the temperature is not stable after the predetermined time has elapsed, the process moves to step 5134.

Note that if the result of determination in step 5121 is that the power has just been turned on, the process moves to step 5123.

Further, if the result of the determination in step 5122 is that the recording head has not just been replaced, the process moves to step 5139.

(Fifth example) FIG. 13 shows a fifth embodiment of the invention.

In comparison with the fourth embodiment, this embodiment differs in the first and second temperature control means. That is, in the fourth embodiment, a heating device that heats the vicinity of the recording head 4 is used, but in this embodiment, a cooling device 15 that cools the vicinity of the recording head 4 is used.
I made it.

The positional relationship of the cooling device 15 with respect to the recording head 4 and thermistor 8 is as shown in FIG.
, is not different from the positional relationship marked on the thermistor 8.

FIG. 14 is a flowchart showing an example of the temperature correction procedure by MPLI 11.

In comparison with that of the fourth embodiment, the temperature correction procedure of the present embodiment includes a step of proceeding when the determined temperature in step 5125 is the specified temperature, and a step of proceeding to step 5126.
As a result of the determination in step 5127, a step to proceed to when the temperature after the predetermined time ilA is not stable, a step to proceed to if the result of determination in step 5127 is not higher than the specified temperature, and as a result of the determination in step 5127, The step to which the process proceeds when the temperature is higher than the specified temperature is different.

That is, in step 5125, if the determined temperature is the specified temperature, the process moves to step 5150, where the cooling device 15 is turned off, and step 5
Move to 13m.

Further, as a result of the determination in step 5126, if the temperature after a predetermined period of time is not stable, the process moves to step 5154, and in step 5154, the cooling device 15 is turned off,
The process moves to step 5135.

Further, as a result of the determination in step 5127, if the temperature is not higher than the specified temperature, the process moves to step 5148, where the cooling device 15 is turned off, and the process returns to step 5124.

Further, as a result of determination in step 5127, if the temperature is higher than the specified temperature, the process moves to step 5149, and step 51
At step 49, the cooling device 15 is turned to OIL, and the process returns to step 5124.

(6th example) FIG. 15 shows a sixth embodiment of the invention.

In comparison with the fifth embodiment, this embodiment is different from the first and second temperature control means. That is, in the fifth embodiment, a cooling device was used to cool the vicinity of the recording head 4, but in this embodiment, a cooling device 15 was used to cool the vicinity of the recording head 4.
A heating device 14 was used to heat the vicinity of the recording head 4.

The positional relationship of the heating device 14 and the cooling device 15 with respect to the recording head 4 and thermistor 8 is the same as the positional relationship of the heating device 14 with respect to the recording head 4 and thermistor 8 shown in FIG.

FIG. 16 is a flowchart showing an example of the temperature correction procedure by MPtl 11.

In comparison with that of the fifth embodiment, the temperature correction procedure of this embodiment is a step in which the process proceeds when the determined temperature in step 5125 is the specified temperature.

As a result of the determination in step 5126, there is a step to proceed to when the temperature after a predetermined period of time has not stabilized, a step to proceed to when the result of determination in step 5127 is that the temperature is not higher than the specified temperature, and a step to proceed to if the temperature is not higher than the specified temperature as determined in step 5127. As a result, the steps to be performed when the temperature is higher than the specified temperature are different.

That is, if the determined temperature is the specified temperature in step 5125, the process moves to step 5165, and in step 5165, the heating device 14 and the cooling device 15 are turned off.
F L/, go to step 5131 for 8 lines.

Further, as a result of the determination in step 5126, if the temperature after a predetermined period of time is not stable, the process moves to step 5166, where the heating device 14 and the cooling device 15 are turned off, and the process moves to step 5135.

Furthermore, as a result of the judgment in step 5127, if the temperature is not higher than the specified temperature, the process moves to step 516m, and in step 5161 the heating device 14 is turned ONL/, and in step 5
At step 162, the cooling device 15 is turned off, step 512
Return to 4.

Further, as a result of determination in step 5127, if the temperature is higher than the specified temperature, the process moves to step 5163, and step 51
At step 63, the cooling device 15 is turned on, and at step 5164, the heating device 15 is turned off, and the process returns to step 5124.

[Effects of the Invention] As explained above, according to the present invention, since it is configured as described above, there is an effect that maintenance costs can be reduced.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a liquid jet recording apparatus according to the first embodiment of the present invention, FIG. 2 is a diagram showing a specific example of the water amplifier 9 shown in FIG. 1, and FIG. 3 is a positional relationship between the print head 4 and thermistor 8. FIG. 4 is a diagram showing the structure of the liquid jet recording apparatus of the first embodiment, FIG. 5 is a flow chart showing an example of the temperature correction procedure by the MPU 11 in the first embodiment, and FIG. 6 is a diagram showing the structure of the liquid jet recording apparatus of the first embodiment. A block diagram showing a liquid jet recording device according to a second embodiment, FIG. 7 is a flowchart showing an example of a temperature correction procedure using MPII 11 in a second embodiment, and FIG. 8 is a liquid jet recording device according to a third embodiment of the present invention. FIG. 9 is a flowchart showing an example of the temperature correction procedure using MPull in the third embodiment. FIG. 10 is a block diagram showing a liquid jet recording apparatus according to the fourth embodiment of the present invention. FIG. 11 is a printing diagram. FIG. 12 is a flowchart showing an example of the temperature correction procedure by MPtl 11 in the fourth embodiment; FIG. FIG. 14 is a flowchart showing an example of a temperature correction procedure by MPtl 11 in the fifth embodiment; FIG. 15 is a block diagram showing a liquid jet recording device according to the sixth embodiment of the present invention. FIG. 16 is a flowchart showing an example of the temperature correction procedure by the MPU 11 in the sixth embodiment. 4...Print head, 7...Semiconductor diode, 8...Thermistor, 11...MPU. 12... Temperature correction in progress/completion display device, 13... Temperature correction success/failure display device, 14... Heating device, 15... Cooling device. Figure 1 Figure 4

Claims (1)

[Scope of Claims] 1) A liquid jet recording apparatus having a replaceable recording head, comprising: a first temperature detection element that detects the temperature of the recording head; and a second temperature detection element that detects the temperature in the vicinity of the recording head. an element, a first correction means for correcting a first temperature detected by the first temperature detection element based on a second temperature detected by the second temperature detection element, and a correction operation by the first correction means. 1. A liquid jet recording device comprising: display means for performing display. 2) The liquid jet recording device according to claim 1, wherein the display means includes a first display section that displays that the first temperature is being corrected by the first correction means based on the second temperature. . 3) A liquid jet recording apparatus according to claim 2, wherein the display means includes a second display section that displays success or failure of correction of the first temperature. 4) The liquid jet recording apparatus according to claim 1, further comprising a first temperature control means for controlling the temperature in the vicinity of the recording head. 5) The liquid jet recording apparatus according to claim 1, wherein the second temperature detection element has higher temperature detection accuracy than the first temperature detection element. 6) A liquid jet recording apparatus having a replaceable recording head, comprising: a first temperature detection element that detects the temperature of the recording head; a second temperature detection element that detects the temperature near the recording head; and a specified temperature. A liquid jet recording apparatus characterized by comprising: a second correction means for correcting the detection output of the first temperature detection element based on the detection output of the second temperature detection element. 7) In claim 6, the second correction means is configured to perform heating or cooling based on the output of the second temperature sensing element in order to bring the temperature near the recording head to the prescribed temperature prior to the correction process. A liquid jet recording device characterized by having two temperature control means.