JP2002364581A - Replacement detection device for fan unit - Google Patents

Abstract

(57) [Problem] To provide a fan device replacement time detecting device capable of issuing a replacement warning before a fan fails. SOLUTION: The rotation number of the fan is detected, and when the life rotation number set in advance is reached, a display for replacing the fan is displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fan device replacement time detecting device which detects a replacement time of a fan device and issues a warning.

[0002]

2. Description of the Related Art In designing and manufacturing a fan device, a predetermined service life is assumed, and care is taken to prevent damage to parts during the service life. Therefore, the fan device has a guaranteed life guaranteed by the manufacturer, and it is preferable to periodically replace the fan device within this guaranteed life range. Conventionally, it has been left to the user to determine whether or not to replace the fan device, such as by calculating the actual working time and comparing it with the guaranteed life. In some cases, a fan which has not reached the end of its life is discarded as it is when the fan device is discarded.

[0003]

As described above, conventionally, there has been no means for objectively judging the replacement of the fan device. Therefore, the replacement of the fan device is delayed, and the fan device is damaged due to coil burning, damage to the bearing, and the like. There was a risk of failure. In particular, if the fan device is used to cool electrical heating components,
There is a risk that the electrical components will be damaged.

[0004] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a replacement time detecting device for a fan device that can issue a replacement warning before the fan device breaks down.

[0005]

In order to solve the above-mentioned problems, according to the present invention, an operation detecting means for detecting an operation of a fan device, and a rotation of the fan device based on a detection result of the operation detecting device. Number of revolutions detecting means for detecting the number of revolutions, recording means for recording the detected number of revolutions, comparison means for comparing this number of revolutions with a predetermined number of revolutions indicating a predetermined usage limit of the fan device, Display means for displaying that the fan device should be replaced based on the result.

[0006]

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

FIG. 3 is a perspective view of a copying machine which is a fan device of the present invention, FIG. 4 is a rear view thereof, and FIG. 5 is a front sectional view of the copying machine.

First, a schematic configuration of the copying machine 1 will be described with reference to FIG.

A photosensitive drum 3 serving as an image carrier is rotatably housed in a main body 2 of the copying machine 1. Around the photosensitive drum 3, a primary charger 4, a developing device 5, and a transfer charger 6 are provided. Process devices such as a separation charger 7 and a cleaner 8 are provided.

A document table glass 9 is provided on the upper surface of the apparatus main body 2, and a lamp 10, reflection mirrors 11 to 16, an optical lens 17 and the like constituting an optical system are provided on an upper part in the apparatus main body 2. It is arranged.

On the other hand, in the lower half of the apparatus main body 2, a plurality of transfer materials P are stacked and accommodated in a paper feed cassette 18a,
The transfer material P accommodated in each of the paper feed cassettes 18a, 18b, and 18c is provided with a paper feed roller 19a, 19b, 19c, and a transport roller 2b.
The sheet is conveyed to the registration roller 22 via the conveyance path 21 by 0a, 20b, 20c and the like.

The transfer material P conveyed to the registration roller 22 is conveyed in the apparatus main body 2 substantially horizontally from right to left in FIG. In addition to the charger 6 and the separation charger 7, the belt transport device 2
3. A fixing device 24 and a discharge roller 25 are provided.

An original (not shown) set on the original table glass 9 provided on the upper surface of the apparatus main body 2 is read by an optical system, and a light image corresponding to the original is rotated in the direction of the arrow shown in the figure. When the photosensitive drum 3 is exposed to light, an electrostatic latent image is formed on the photosensitive drum 3 whose surface is charged by the primary charger 4, and the electrostatic latent image is formed by the developing device 5. It is developed and visualized as a toner image.

On the other hand, for example, 1
The transfer material P is conveyed to the registration roller 22, and the transfer material P is sent to a transfer portion between the photosensitive drum 3 and the transfer charger 6 at a timing adjusted by the registration roller 22, and is formed on the photosensitive drum 3. After the transfer of the toner image, the toner image is separated from the photosensitive drum 3 by the operation of the separation charger 7.

The transfer material P separated from the photosensitive drum 3 is sent to the fixing device 24 by the belt conveying device 23, and after the toner image is fixed by the fixing device 24, The sheet is discharged out of the apparatus main body 2 and is stacked on a sheet discharge tray 26 (see FIG. 3).

By the way, as shown in FIG.
In the vicinity of the fixing device 24 in the upper part of the rear surface,
7, a transport fan 28 is provided near the belt transport device 23, and a developing fan 29 is provided near the developing device 5. These fans are driven when the copying machine 1 is operated, and the air in the apparatus main body 2 warmed by the fixing device 24, which is a high heat source, is sent to a rear duct (not shown) by a heat exhaust fan 27.
The air sucked by the conveying fan 28 to attract the transfer material P to the belt conveying device 23 is also sent to a rear duct (not shown), and the air sucked by the floating toner near the developing device 5 in the apparatus main body 2 is also used by the developing fan. It is sent to a rear duct (not shown) by 29 and discharged.

FIG. 1 is a block diagram showing a schematic configuration of a control circuit according to the present invention. A CPU 50 for controlling the entire system is provided. The CPU 50 includes a ROM 51 storing a control program, a RAM 52 storing various data, and a rotation speed detecting unit 5 for detecting a rotation speed of a fan.
3. The display unit 55 is connected.

The life rotation speed of each fan is set in the RAM 52, and when the CPU 50 determines that the rotation speed of each fan has reached the life value, the contents are guided to the display unit 55. It has become. Further, the RAM 52 may be constituted by an EEPROM.

Next, the operation in such a configuration will be described with reference to the flowchart shown in FIG.

First, when a copy key is input, a paper feeding operation is started, and each fan starts rotating. Then, the rotation speed r1 of the heat removal fan 27 is detected, and the rotation speed r1 is recorded in the RAM 52. Similarly, the rotation speed r2 of the transport fan 28 is detected, and the rotation speed r2 is
Recorded in M52. And the developing fan 29 rotation speed r
3 is detected, and the rotation speed r3 is recorded in the RAM 52. After that, when a predetermined copying operation is completed, the life value stored in the RAM 52 in advance is compared with the recorded rotation speeds r1, r2, and r3.
It is determined that it is time to replace the fan, and a guidance is displayed on the display unit. Then, the rotational speeds r1, r2, and r3 recorded in the RAM 52 are cleared.

The display contents of the display unit may be always displayed on the display unit so that a general user can always check the contents, or the display contents may be called only by a service person in the service mode. . According to the former method, a general user other than the service person can always know the durability of the fan. When the latter method is adopted by recording the recorded rotation speeds r1, r2, and r3 without clearing them in the RAM 52, the rotation speeds r1, r2, and r3 of the fan are determined by the service mode by telephone. If a telephone line is connected to the copier so that it can be called, it is possible to check the endurance state of each fan up to the present without a service person having to go to the user.

Further, two set values of the life are provided for the first and second set values, and when the count value is connected to the first set value, a warning display that the fan will soon be connected to the life is displayed. If the replacement is displayed after the second set value, the user should contact the service person in advance or prepare a replacement fan if the replacement can be performed by himself. Can be done.

If the copying machine reaches the end of its life before the fan reaches its end of life and the copying machine is discarded, the RAM
By checking the number of revolutions stored in 52, the endurance status of each fan can be checked, so that a fan that has not reached the end of its life can be reused according to the status.

[0024]

As described above, according to the present invention,
Since the replacement of the fan device can be warned based on the actual operating condition, the fan device can be reliably replaced at a point near its life.

[Brief description of the drawings]

FIG. 1 is a block diagram according to an embodiment of the present invention.

FIG. 2 is a flowchart according to the embodiment of the present invention.

FIG. 3 shows an embodiment of the present invention.

FIG. 4 illustrates an embodiment of the present invention.

FIG. 5 shows an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Copier 2 Main body 3 Photosensitive drum

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2C061 AP04 AQ06 BB10 BB12 BB13 CQ22 CQ42 HH03 HJ10 HV01 HV26 HV33 2H027 DA32 DA45 DE07 DE09 GB08 GB10 HB02 HB16 JA11 JB17 JC06 JC08 JC14 3H021 AA01EA11BA11EA11BA10EA11

Claims (1)

[Claims] 1. An operation detecting means for detecting an operation of a fan device, a rotational speed detecting means for detecting a rotational speed of the fan device based on a detection result of the operation detecting device, and recording the detected rotational speed. Recording means, comparing means for comparing the number of rotations with a predetermined number of rotations indicating a predetermined usage limit of the fan device, and display means for displaying that the fan device should be replaced based on the comparison result. , A replacement time detecting device for a fan device.