JP5803239B2 - Power supply control apparatus, image forming apparatus, power supply control method, power supply control program, and recording medium - Google Patents

Description

  The present invention relates to a power supply control device, an image forming apparatus, a power supply control method, a power supply control program, and a recording medium, and more specifically, drives a switch for supplying / cutting off power supply while appropriately securing a shutdown time. The present invention relates to a power supply control apparatus, an image forming apparatus, a power supply control method, a power supply control program, and a recording medium that appropriately protect a coil by appropriately energizing a coil.

  In image processing apparatuses and image forming apparatuses such as computers, printer apparatuses, copying apparatuses, and composite apparatuses, a power switch is disposed between a power plug inserted into a commercial power outlet and the power supply unit of the apparatus. A rocker switch is generally used as the power switch. The power supply unit performs processing such as conversion of AC (alternating current) to DC (direct current), voltage conversion, and rectification, and supplies the converted data to each unit of the image processing apparatus and the image forming apparatus.

  However, in the image processing apparatus and the image forming apparatus, when the power switch is turned off during various processes, particularly image processing, the power supply unit supplies the power to the apparatus at the same time as the power switch is turned off. If the supply of the power supply is interrupted, it may cause a failure or damage of various data such as image data. For example, if the power switch is turned off due to an erroneous operation or the like while data is being written to the memory, the device may cause damage to data on the memory, damage to the memory device itself, or the like.

  Therefore, conventionally, an image processing apparatus and an image forming apparatus appropriately stop data writing and reading operations to a memory without immediately turning off the power supply to the inside of the apparatus even when the power switch is turned off. It is equipped with a shutdown function to turn off the power supply after various protection processes such as processing, and this shutdown function operates a relay by a coil between the power plug and the power supply unit to contact the relay terminal This is done by providing a power switch that opens and closes. That is, when the power switch detects an off operation of the power switch, the power switch controls the energization to the coil, and the relay disposed between the power plug and the power supply unit is operated by the coil to set the relay terminal contact. After a predetermined time for completing the shutdown process, the power supply from the power plug to the power supply unit is cut off, and the power supply from the power supply unit to each part of the apparatus is cut off.

  A conventional power switch for operating a relay terminal by a coil causes a driving current to flow through the coil for a predetermined time when the power switch is turned off, and connects the relay terminal to a contact to supply commercial power to the power supply unit. When a predetermined time elapses, energization of the coil is stopped, the relay terminal is opened, and the supply of the commercial power supply to the power supply unit is shut off.

  On the other hand, in recent years, there has been a great demand for energy saving and ecology in image processing apparatuses and image forming apparatuses. When a predetermined waiting time elapses in a standby state, supply of power to main parts such as a memory is stopped or reduced. When the power saving mode is executed, the time when the power source power is turned off is stored in the memory or the time related to the power source power off stored in the memory is notified when the power saving mode is executed. It has a function.

  The image processing apparatus and the image forming apparatus having such a power saving mode energize the coil of the power switch that operates the relay terminal by the coil during operation or in a standby state, and the shutdown period is incorrect. In addition to preventing failure and data corruption due to the power switch-off operation, in the power saving mode, the coil is de-energized to reduce power consumption.

  However, when the power switch is turned off in the power saving mode, the power supply to the coil is cut off. Therefore, the function of preventing the failure and the damage of the data and storing the power supply off time in the memory should be used. However, in order to secure these functions even in the power saving mode, it is necessary to prepare a new power switch, which increases the cost and power consumption.

  This new power switch does not energize the coil in the state where the power of the apparatus such as the image processing apparatus or the image forming apparatus is supplied. And the relay terminal contact must be turned off by the exciting current. In this way, even if the power switch is turned off during the energy saving mode, it is possible to prevent a failure or data corruption and to execute a function of recording the power-off time in the memory.

  However, when power to the device is being supplied, stop energizing the coil and turn off the power to the device by passing a coil drive current through the coil and turning the relay terminal contact off. Therefore, as shown in FIGS. 7A and 7B, the coil drive current is allowed to flow through the coil only during the shutdown period until the power supply power actually supplied from the power supply unit to the load side is cut off. Depending on the characteristics of the power supply unit and the state on the load side, a delay period occurs, and excess current flows through the coil. That is, if the coil drive current is not a pulse signal but a low (low) coil drive current as shown in FIG. 7B, the timing until the power supply stop position shown in FIG. 7A is reached. 7B, the coil drive current flows through the coil during a period equal to or longer than the shutdown period (the minimum energization time in which the OFF function as the shutdown function is effective) shown in FIG. 7B. 7 (b), an extra coil drive current is passed through the coil for the period Y.

  In addition to an increase in power consumption, as shown in FIGS. 8A and 8B, the coil has a shorter life as the coil temperature increases, and a period during which the coil drive current flows through the coil. The longer it is, the shorter its life. As a result, there is a problem that the life of the coil is shortened and power consumption is excessively consumed by the amount of coil driving current flowing through the delay period coil.

  In this case, as shown in Patent Document 1, it has a plurality of output systems, has a switch element that turns off a part of its output, and turns the output unit on and off, so that it is connected to the output terminal of the output unit. A method for reducing the inrush current, extending the life of the power supply device and the switch element, and reducing the failure may be used by controlling the connected load to the minimum. There are problems that the cost is high and the life of the coil cannot be extended.

  SUMMARY OF THE INVENTION Accordingly, the present invention provides a power supply control device and an image forming apparatus that can prolong the service life by appropriately performing a shutdown process and suppressing an increase in the temperature of a coil that drives a switch for supplying / cutting off the supply of commercial power. An object is to provide a power control method, a power control program, and a recording medium.

  In order to achieve the above object, the present invention performs the supply / supply interruption of the commercial power supply to the power supply process for generating various power supply power from the commercial power supply by stopping / energizing the drive current to the coil. When the temperature in the vicinity of the coil is detected and there is an instruction to turn off the commercial power supply, the energization time for the coil is obtained based on the detected temperature in the vicinity of the coil, and after a predetermined shutdown time has elapsed, A drive current is supplied to the coil for the energization time to shift to a power supply cut-off state.

  Further, the present invention stores in the storage means the total energization time energized to the coil so that the power supply is cut off by the switch, obtains the energization time to the coil based on the total energization time, and performs the shutdown After the elapse of time, a drive current is allowed to flow through the coil for the energization time, the power supply is cut off, and the energization time is added to the total energization time of the storage means.

  Further, the present invention stores the off operation time of the commercial power supply in the off operation time storage means, and when there is an off operation of the commercial power supply, the previous off operation is performed based on the off operation time of the off operation time storage means. An elapsed time from the set time may be obtained, and an excitation current may be passed through the coil on condition that the elapsed time has exceeded a predetermined threshold time.

  Further, the present invention may be characterized in that when the temperature in the vicinity of the coil is equal to or higher than a predetermined cooling start temperature, a cooling means for sending cold air to the coil is driven.

Further, the present invention stores the preset allowable total energization time of the coil in the allowable total energization time storage means, stores the total energization time energized in the coil in the total energization time storage means, and The life of the coil may be determined based on the energization time and the allowable total energization time, and the determination result may be notified.

  According to the present invention, it is possible to appropriately perform the shutdown process, and to suppress the temperature rise of the coil that drives the switch for supplying / cutting off the supply of commercial power, thereby extending the life.

The principal part block block diagram of the compound apparatus to which one Example of this invention is applied. The flowchart which shows a power OFF control process. The flowchart which shows the power supply OFF control process accompanied by the lifetime determination of a coil. FIG. 4 is a flowchart showing processing subsequent to the processing in FIG. 3. FIG. The flowchart which shows the power supply OFF control process accompanied by the lifetime determination of a coil, and drive control of a cooling fan. 6 is a flowchart showing processing subsequent to FIG. A comparison is made between the case where the 5V power supply of the power supply unit and the coil drive current are fixed to low and pulse. The figure which shows the relationship between the lifetime of a coil, temperature, and electricity supply time.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, since the Example described below is a suitable Example of this invention, various technically preferable restrictions are attached | subjected, However, The range of this invention is unduly limited by the following description. However, not all the configurations described in the present embodiment are essential constituent elements of the present invention.

  1 to 6 are diagrams showing an embodiment of a power supply control device, an image forming apparatus, a power supply control method, a power supply control program, and a recording medium according to the present invention, and FIG. 1 is a block diagram of a main part of a composite apparatus 1 to which an embodiment of a forming apparatus, a power control method, a power control program, and a recording medium are applied.

  In FIG. 1, a composite apparatus (image forming apparatus) 1 includes a switch unit 2, a controller control unit 3, a power supply unit 4, an engine control unit 5, an operation unit 6, and a scanner, plotter, paper feed unit, paper discharge unit, etc. (not shown). It has.

  The switch unit (switch means) 2 includes a coil 21, switch terminals 22a and 22b, a cooling unit 23, a temperature detection unit 24, and the like. The controller control unit 3 includes a main system control unit 31, a nonvolatile memory 32, a network An I / F 33, a subsystem control unit 34, a controller power supply generation unit 35, a data storage unit 36, an RTC (Real Time Clock) 37, and a drive unit 38 are provided.

  The scanner performs main scanning and sub-scanning of the document to read the image of the document, and the plotter based on the image data of the document read by the scanner and the image data sent from the host computer via the network I / F 33. An image is formed on the sheet conveyed from the sheet feeding unit. The paper discharge unit discharges the paper on which the image is formed by the plotter to the paper discharge tray.

  The power supply unit (power supply means) 4 is connected to the switch terminal 22a of the switch unit 2, and when commercial power of AC100V is supplied via the switch terminal 22a, the commercial power of AC100V is converted to AC / DC Processing such as conversion, voltage conversion, and rectification is performed to supply power to the engine control unit 5, the switch unit 2, the controller control unit 3, and other units of the copying apparatus 1.

  The operation unit 6 includes various operation keys such as a numeric keypad, a start key, a stop key, and a function key, and also includes a display unit (notification unit). The display unit is superimposed on the liquid crystal display and the liquid crystal display. A display with a touch panel, which is configured by a touch panel and can be operated by touching a function button displayed on a liquid crystal display, is used.

  The engine control unit 5 is supplied with power from the power supply unit 4 and controls the operations of the scanner and the plotter under the control of the main system control unit 31.

  The switch unit 2 uses a rocker switch, and the cooling unit 23 and the temperature detection unit 24 are incorporated in the rocker switch.

  A switch terminal (switch means) 22 a of the switch unit 2 is disposed between the plug 7 inserted into a commercial power outlet and the power supply unit 4, and is turned off / on by the exciting force of the coil 21. That is, the switch terminal 22a is turned off by the exciting force of the coil 21 only while the coil 21 is energized. When the energizing to the coil 21 is interrupted, the exciting force of the coil 21 is lost and Become.

  The switch terminal (power operation means) 22b is turned on / off by the on / off operation of the switch unit 2, one terminal is grounded, and the other terminal is connected to the subsystem control unit 34. . Accordingly, when the switch unit 2 is turned off, a predetermined potential is generated in the subsystem control unit 34, and when the switch unit 2 is turned on, a ground potential is generated in the subsystem control unit 34.

  The cooling unit (cooling means) 23 uses a fan or the like, and is driven by a drive current from the subsystem control unit 34 to cool the coil 21 by a method such as sending cool air to the coil 21.

  The temperature detection unit (temperature detection means) 24 uses a temperature sensor or the like, detects the temperature of the switch unit 2, particularly the temperature near the coil 21, and outputs it to the subsystem control unit 34.

  A main isim control unit 31 of the controller control unit 3 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. Each unit of the composite device 1 is based on a program in the ROM. And the basic operation as the composite apparatus 1 is executed. The subsystem control unit 34 includes a CPU, a ROM, a RAM, and the like, and stores a basic program as the subsystem control unit 34 and a power control program for executing a power control method of the present invention described later in the ROM. doing.

  That is, the composite apparatus 1 includes a ROM, an EEPROM (Electrically Erasable and Programmable Read Only Memory), an EPROM, a flash memory, a flexible disk, a CD-ROM (Compact Disc Read Only Memory), a CD-RW (Compact Disc Rewritable), a DVD ( Read a power control program for executing the power control method of the present invention recorded on a computer-readable recording medium such as a digital versatile disk (SD), a secure digital (SD) card, or an MO (Magneto-Optical Disc) and read ROM The image processing for executing the power supply control method that reliably shuts down when the switch unit 2 described later is turned off and suppresses the deterioration of the coil 21 and prolongs the life of the switch unit 2. It is constructed as an image forming apparatus equipped with the apparatus. This power supply control program is a computer-executable program written in a legacy programming language such as assembler, C, C ++, C #, Java (registered trademark) or an object-oriented programming language, and is stored in the recording medium. Can be distributed.

  In particular, the main system control unit 31 shuts off the supply of power such as shutdown processing when the switch unit 2 is turned off, that is, storage of image data or other data being processed into the nonvolatile memory 32. Even if the image data and other data being processed are lost, processing for preventing damage to the nonvolatile memory 32 is executed.

  As the nonvolatile memory 32, a hard disk, an EEPROM (Electrically Erasable Programmable Read Only Memory), or the like is used, and the stored contents are held even when the power supply of the copying apparatus 1 is cut off. The nonvolatile memory 32 writes and reads various data under the control of the main system control unit 31.

  The network I / F (notification means) 33 is connected to a network such as a host computer (not shown), and the network I / F 33 communicates with the host computer via the network.

  The controller power supply generation unit 35 receives power supply power from the power supply unit 4, generates power supply power of various voltages, and supplies it to each unit in the controller control unit 3.

  The RTC (time measuring means) 37 includes an oscillation circuit, a frequency dividing circuit, and the like, and displays the current time and various times used in the copying apparatus 1, in particular, power supply power related time such as power supply power cutoff, supply, and shutdown processing time. Keep time.

The data storage unit (off operation time storage unit, storage unit) 36 controls various data necessary for the execution processing of the subsystem control unit 34, in particular, power supply power related time information measured by the RTC 37 under the control of the subsystem control unit 34. Is stored and read out. This power supply power related time information includes, for example, the energization time for the coil 20, the total energization time for energizing the coil 21 in order to place the switch terminal 22a in the power supply cutoff state (off state), the power supply OFF time, and the like. In addition, the data storage unit 36 stores a temperature table in which a pulse width for energizing the coil 21 is registered for each temperature of the coil 21, and the temperature table of the data storage unit 36 flows to the coil 21 for each temperature. A pulse width setting value for adjusting the pulse width of the coil drive current is provided. The drive unit 38 is connected to the coil 21 and the subsystem control unit 34 of the switch unit 2, and the coil is controlled under the control of the subsystem control unit 34. The energization to 21 is controlled to turn on / off the switch terminal 22a.

  The subsystem control unit 34 controls the power supply power supplied to the controller control unit 3 by the controller power supply generation unit 35 based on the program in the ROM, particularly the power supply control program, and the time information measured by the RTC 37. Based on various processes, particularly acquisition of power supply related time information, time information acquired from the RTC 37, particularly storage of power supply power related time information in the data storage unit 36, and power supply power related time information stored in the data storage unit 36 Various operations based on the on / off operation of the switch terminal 22a, the drive control of the cooling fan 23 based on the temperature detection unit 24, the drive control of the coil 21 via the drive unit 38 based on the setting of the energization time, and the operation instruction from the operation unit 6. Processing such as processing and notification to the main system control unit 31 and display control of various display information on the display unit of the operation unit 6 It is carried out.

  The switch unit 2, the controller control unit 3 (particularly the subsystem control unit 34), and the power supply unit 4 function as a power control device as a whole.

  Next, the operation of this embodiment will be described. The composite apparatus 1 of the present embodiment extends the life of the switch unit 2 by suppressing the temperature rise of the coil 21 of the switch unit 2.

  That is, as shown in FIG. 8, the coil 21 of the switch unit 2 has a long energization time, and when the temperature rises, its life is shortened. Therefore, the energization time to the coil 21 is shortened and the temperature rises. Suppressing this extends the life of the coil 21.

  Then, as described above, the current of the power supply unit 4 is measured until the current during the period required for the shutdown process (hereinafter referred to as effective energization time) is passed through the coil 21 and the power supply stop is actually started. Depending on the load and the state of the load, a delay may occur. If the drive current of the coil 21 is a low fixed coil drive current as shown in FIG. 7 (b), a time current longer than the effective energization time (X) flows through the coil 21, and the delay period (Y) Only an unnecessary current flows in the coil 21. As shown in FIG. 8, the temperature of the coil 21 increases due to the coil driving current flowing through the coil 21 and its time width, and the life of the coil 21, that is, the life of the switch unit 2 is shortened. Further, the effective energization time (X) varies depending not only on the temperature of the coil 21 but also on the ambient temperature in the vicinity of the coil 21.

  Therefore, the composite apparatus 1 of the present embodiment includes a coil 21, a temperature detection unit 24 that detects the temperature in the vicinity of the coil 21, and a cooling unit 23 that cools the coil 21 in the switch unit 2, and an effective energization time ( A temperature table for adjusting the pulse width of X) is stored in the data storage unit 36, and the coil drive current is determined by referring to the temperature table based on temperature information (temperature data) in the vicinity of the coil 21 detected by the temperature detection unit 24. By controlling the energizing time (pulse width) to flow, the minimum necessary coil drive current is passed through the coil 21 to reduce power consumption and extend the life of the coil 21.

  Then, the composite apparatus 1 performs a power OFF control process as shown in FIG. That is, when the switch unit 2 is turned off and the switch terminal 22b is opened, and the subsystem control unit 34 detects the OFF operation of the switch unit 2 (Step S101), the multifunction device 1 detects that the main system is turned on. The control unit 31 starts a shutdown process (step S102), confirms a writing state of data such as image data in the nonvolatile memory 32 (confirmation of writing status), and checks whether writing is in progress (step S104).

  In step S104, when data is not being written (YES), the subsystem control unit 34 acquires temperature data (temperature information) T in the vicinity of the coil 21 from the temperature detection unit 24 (step S105). Based on the temperature data T, the temperature table of the data storage unit 36 is referred to determine the pulse width of the coil drive current to be passed through the coil 21 (step S107).

  The subsystem control unit 34 acquires the current time information from the RTC 37 (step S107), passes the drive current having the determined pulse width through the coil 21, closes the switch terminal 22a, and then switches the switch terminal 22a. In the open state, the supply of power from the power supply unit 4 to each unit is cut off (step S108).

  In step S104, when the data is being written (NO), the subsystem control unit 34 requests the main system control unit 31 to end the writing process for the process of each module being written ( In step S109, it is checked whether writing is in progress (step S110).

  In step S110, when writing is in progress (NO), the subsystem control unit 34 returns to step S109 and performs the same processing from the write processing end request (steps S109 and S110), and in step S110, writing is in progress. If not (YES), the process proceeds to step S105, and the same processing as described above is performed from the acquisition of the temperature data T in the vicinity of the coil 21 (steps S105 to S108).

  Next, the composite apparatus 1 executes a power-off control process with a coil life notification process for determining and notifying the life of the coil 21 as shown in FIGS. 3 and 4. In FIG. 3 and FIG. 4, the same step numbers are assigned to the same processing steps as the power OFF control processing of FIG. That is, when the subsystem control unit 34 detects that the switch unit 2 is turned off and the switch terminal 22b is turned off (step S101), the multifunction device 1 uses a counter that counts the total number of times the switch unit 2 is turned off. The count value is counted up (step S201), and it is checked whether the total number of OFF times of the switch unit 2 is greater than or equal to a preset threshold number N (step S202).

  That is, a threshold value (allowable total energization time) that allows the drive current to flow until the coil 21 reaches the end of its life is set, and the threshold value is a pulse of the coil drive current that is passed through the coil 21 by one OFF operation of the switch unit 2. By dividing by the period of the width, the total number of OFF times (A) that can be turned off before the coil 21 reaches the end of its life can be calculated.

  Then, the subsystem control unit 34 obtains the number of days from when the switch unit 2 is attached to the multifunction apparatus 1 to the present and the total number of OFF operations (B) of the switch unit 2 OFF operation, and the switch unit 2 is turned off per day. The average number of OFF times (C) to be performed is calculated, and the life days (A−B) / C days) of the coil 21 are calculated. Then, the subsystem control unit 34 stores the total number of OFF times (A), the average number of OFF times per day (C), and the life of the coil 21 in the data storage unit 36. The composite device 1 displays the total number of OFF times (X), the average number of OFF times per day (C), and the life of the coil 21 on the display unit of the operation unit 2 by operating the operation unit 6 for reference. It can also be referred to by an operation from a host computer connected to the network via the network I / F 33.

  In step S202, when the total number of OFF times of the switch unit has not reached the threshold number N (NO), the subsystem control unit 34 starts a shutdown process (step S102), and the nonvolatile memory The state of writing data to 32 is confirmed (step S103), and it is checked whether data is being written (step S104).

  In step S104, when data is not being written (YES), the subsystem control unit 34 acquires the temperature data T in the vicinity of the coil 21 from the temperature detection unit 24 as shown in FIG. 4 (step S105). Based on the acquired temperature data T, the temperature table of the data storage unit 36 is referred to determine the pulse width of the drive current to be passed through the coil 21 (step S107).

  When the subsystem control unit 34 determines the pulse width of the drive current, the subsystem control unit 34 obtains current time information from the RTC 37, compares the time when it was turned off last time with the current time, and sets a preset power-off grace time. Wait for t to elapse (step S204). When the power-off grace time t elapses, the subsystem control unit 34 acquires the current time information from the RTC 37 (step S107), stores the current off time in the data storage unit 36, and determines the determined pulse width. Then, after the switch terminal 22a is closed, the switch terminal 22a is opened, and the supply of power from the power supply unit 4 to each unit is cut off (step S108).

  In step S104, when the data is being written (NO), the subsystem control unit 34 requests the main system control unit 31 to end the writing process for the process of each module being written ( In step S109, it is checked whether writing is in progress (step S110).

  Furthermore, the composite apparatus 1 executes a power OFF control process that involves determining the life of the coil 21 and controlling the driving of the cooling fan 23 as shown in FIGS. 5 and 6. 5 and 6, the same step numbers are assigned to the same processing steps as the power OFF control processing of FIGS. 2, 3, and 4 to simplify the description. That is, when the subsystem control unit 34 detects that the switch unit 2 is turned off and the switch terminal 22b is turned off (step S101), the multifunction device 1 uses a counter that counts the total number of times the switch unit 2 is turned off. The count value is counted up (step S201), and it is checked whether the total number of OFF times of the switch unit 2 is greater than or equal to a preset threshold number N (step S202).

  In step S202, when the total number of OFF times of the switch unit 2 has not reached the threshold number N (NO), the subsystem control unit 34 starts a shutdown process (step S102), and the nonvolatile memory 32. The state of writing data to is checked (step S103), and it is checked whether writing is in progress (step S104).

  In step S202, if the total number of OFF times of the switch unit 2 is equal to or greater than the threshold number N, the subsystem control unit 34 displays display information indicating that the life of the coil 21 has been reached and it is time to replace the switch unit 2. 6 is displayed (step S203), the process proceeds to step S102, the shutdown process is started (step S102), the data writing state to the nonvolatile memory 32 is confirmed (step S103), and the writing is performed. It is checked whether it is in the middle (step S104).

  In step S104, when writing is not in progress (when YES), as shown in FIG. 4, the subsystem control unit 34 acquires temperature data T in the vicinity of the coil 21 from the temperature detection unit 24 (step S105). Based on the acquired temperature data T, the pulse width of the drive current to be passed through the coil 21 is determined with reference to the temperature table of the data storage unit 36 (step S107).

  When determining the pulse width of the drive current, the subsystem control unit 34 obtains the current time information from the RTC 37, obtains the previous off operation time from the data storage unit 36, and determines the time when the current was turned off and the current time. The times are compared, and the system waits for the preset power-off grace time t to elapse (step S204). When the power-off grace time t elapses, the subsystem control unit 34 acquires current time information from the RTC 37 (step S107), stores the current off time in the data storage unit 36, and drives the determined pulse width. After the current is passed through the coil 21 to close the switch terminal 22a, the switch terminal 22a is opened to cut off the supply of power from the power supply unit 4 to each unit (step S108).

  In step S104, when the data is being written (NO), the subsystem control unit 34 requests the main system control unit 31 to end the writing process for the process of each module being written ( In step S109, it is checked whether writing is in progress (step S110).

  As described above, the composite apparatus 1 according to the present embodiment supplies / cuts off the commercial power supply to the power supply unit 4 that generates various power supplies from the commercial power supply by stopping / energizing the drive current to the coil 21. When the temperature in the vicinity of the coil 21 is detected by the temperature detection unit 24 and an instruction to turn off the commercial power supply is given by the operation of the switch unit 2, the coil 21 is controlled based on the detected temperature in the vicinity of the coil 21. The energization time (pulse width of the coil drive current) is obtained, and after a predetermined shutdown time has elapsed, the drive current is supplied to the coil 21 for the energization time and the power supply is cut off.

  Therefore, when the switch unit 2 is turned off, even if the supply of power such as storage of image data or other data being processed to the nonvolatile memory 32 is cut off, the image data being processed or other A shutdown process for preventing data loss and damage to the non-volatile memory 32 can be appropriately executed, and as shown in FIG. It is possible to extend the life of the coil 21 by suppressing the temperature of the coil 21 from rising unnecessarily.

  Further, the composite apparatus 1 of this embodiment stores the total energization time in which the coil 21 is energized in order to place the switch unit 2 in the power supply cutoff state in the data storage unit 36, and the subsystem control unit 34 Is detected based on the total energization time of the data storage unit 36, the energization time to the coil 21 is obtained, and after the shutdown time elapses, the drive current is supplied to the coil 21 for the energization time. While shifting to the power supply cutoff state, the energization time to the coil 21 is added to the total energization time of the data storage unit 36.

  Therefore, it is possible to determine the energization time for the coil 21 based on the total energization time for the coil 21, and to further increase the energization time for the coil 21, thereby unnecessarily increasing the temperature of the coil 21. This can be further suppressed and the life of the coil 21 can be extended.

  Furthermore, when the subsystem control unit 34 acquires the off operation time of the switch unit 2 from the RTC 37 and stores it in the data storage unit 36 and detects the off operation of the switch unit 2, Based on the OFF operation time of the storage unit 36, an elapsed time from the time when the previous OFF operation was performed is obtained, and a coil drive current is passed through the coil 21 on the condition that the elapsed time has exceeded a predetermined threshold time. ing.

  Therefore, it is possible to appropriately prevent the energization of the coil 21 from occurring intermittently and to increase the temperature rise due to the coil drive current flowing in the coil 21, and to extend the life of the coil 21 more appropriately.

  Further, in the composite apparatus 1 according to the present embodiment, when the temperature near the coil 21 detected by the temperature detection unit 24 exceeds the predetermined cooling start temperature, the subsystem control unit 34 drives the cooling unit 23 to cause the coil 21 to move. Sending cold air.

  Therefore, the temperature rise at the time of energizing the coil 21 can be suppressed, and the long life of the coil 21 can be further extended.

  Furthermore, the composite apparatus 1 of the present embodiment stores the preset allowable total energization time of the coil 21 in the data storage unit 36, and the subsystem control unit 34 stores the total energization time in which the coil 21 is energized as data. The life of the coil 21 is determined on the basis of the total energization time and the allowable layer energization time, and the determination result is displayed on the display of the operation unit 6 or the host via the network I / F 33. Notification processing such as notification to a computer is performed.

  Accordingly, it is possible to appropriately notify the user of the replacement time of the switch unit 2, and to ensure proper operation of the composite apparatus 1.

  The invention made by the present inventor has been specifically described based on the preferred embodiments. However, the present invention is not limited to that described in the above embodiments, and various modifications can be made without departing from the scope of the invention. It goes without saying that it is possible.

  INDUSTRIAL APPLICABILITY The present invention can be used for a power supply control device that controls on / off of a switch terminal by a coil to provide a shutdown period, an image forming apparatus equipped with the power supply control device, a power supply control method, a power supply control program, and a recording medium. it can.

DESCRIPTION OF SYMBOLS 1 Composite apparatus 2 Switch part 3 Controller control part 4 Power supply part 5 Engine control part 6 Operation part 21 Coil 22a, 22b Switch terminal 23 Cooling part 24 Temperature detection part 31 Main system control part 32 Non-volatile memory 33 Network I / F
34 Subsystem control unit 35 Controller power supply generation unit 36 Data storage unit 37 RTC
38 Drive unit

JP 11-338321 A

Claims (9)

Power supply means for generating various power supply power from commercial power supply power;
Power operation means for instructing on / off of commercial power supply power;
Switch means for performing supply / supply interruption of commercial power supply to the power supply means;
A coil that causes the switch means to shift to a supply interruption state of power supply power when a drive current is applied;
Temperature detecting means for detecting the temperature in the vicinity of the coil;
When the power operation means is turned off, the energization time to the coil is obtained based on the temperature in the vicinity of the coil detected by the temperature detection means, and after the predetermined shutdown time has elapsed, only the energization time is applied to the coil. Control means for passing a drive current to shift the switch means to a power supply cutoff state;
A power supply control device comprising: The power supply control device
Storage means for storing the total energization time energized to the coil in order to put the switch means in a power supply cutoff state;
The control means includes
When it is detected that the power operation means is turned off, an energization time for the coil is obtained based on the total energization time of the storage means, and after the shutdown time has elapsed, a drive current is supplied to the coil for the energization time. 2. The power supply control device according to claim 1, wherein the switch means is shifted to a power supply cutoff state and the energization time is added to the total energization time of the storage means. The power supply control device
A time measuring means for measuring the current time;
Off time storage means for storing, as an off time, a time when the switch means has shifted to a supply cutoff state by the drive current;
With
The control means includes
Upon detecting an off operation of the power operation means, the current time is acquired from the time measuring means, an elapsed time from the previous off time of the off time storage means is obtained, and the elapsed time has exceeded a predetermined threshold time 3. The power supply control device according to claim 1, wherein a drive current is supplied to the coil on the condition that the off time is stored in the off time storage unit. 4. The power supply control device
Cooling means for sending cold air to the coil;
Cooling control means for driving the cooling means when the temperature in the vicinity of the coil detected by the temperature detection means is equal to or higher than a predetermined cooling start temperature;
The power supply control device according to any one of claims 1 to 3, further comprising: The power supply control device
A predetermined notification means;
An allowable total energization time storage means for storing a preset allowable total energization time of the coil;
Total energization time storage means for storing the total energization time energized in the coil;
Life determination means for determining the life of the coil based on the total energization time and the allowable total energization time, and notifying the determination result from the notification means;
The power supply control device according to any one of claims 1 to 4, further comprising:   An image forming apparatus comprising the power supply control device according to claim 1. A power processing step for generating various types of power from commercial power,
A switch processing step for supplying / interrupting supply of commercial power to the power processing step by energization stop / energization of the drive current to the coil;
A temperature detection processing step for detecting a temperature in the vicinity of the coil;
When there is an instruction to turn off the commercial power supply, the energization time to the coil is obtained based on the temperature in the vicinity of the coil detected in the temperature detection processing step, and the energization time to the coil is determined after a predetermined shutdown time has elapsed. A control processing step of causing only the drive current to flow and shifting to the power supply cutoff state by the switch processing step;
A power supply control method characterized by comprising: On the computer,
Power processing for generating various types of power from commercial power,
Switch processing for supplying / interrupting supply of commercial power to the power processing by stopping energization / energization of the drive current to the coil;
Temperature detection processing for detecting the temperature in the vicinity of the coil;
When there is an instruction to turn off the commercial power, the energization time for the coil is obtained based on the temperature in the vicinity of the coil detected by the temperature detection process, and after the predetermined shutdown time has elapsed, only the energization time is applied to the coil. A control process for causing a drive current to flow and shifting to a power supply cutoff state by the switch process;
The power supply control program characterized by performing this.   A computer-readable recording medium on which the power supply control program according to claim 8 is recorded.

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