JP2004170072A - Control mode setting device of combustion machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily set the control conditions of an altitude and an extension pipe in a control mode setting device of a combustion machine. <P>SOLUTION: The control mode setting device of the combustion machine comprises a central control part 9 having a plurality of control conditions such as combustion air/fuel corresponding to the altitude and the extension pipe, a storage means 16 selecting one of the plurality of control conditions of the central control part 9 and writing as mode selection information, and set switches 6 and 7 installed on an operating part 1. When the set switches 6 and 7 on the operating part 1 are specifically operated differently from normal operations, the device comes into a mode setting state in which the control conditions corresponding to the altitude and the extension pipe can be set in order, and the mode selection information corresponding to the altitude and the extension pipe is selected from among the plurality of the control conditions. In the mode selection information corresponding to the altitude and the extension pipe, limiters are installed at the lower limits of a fuel supply amount and a combustion air supply amount in an altitude mode and the long pipe mode other than standard modes to prevent the combustion amount from being lowered to a specified limit or below. <P>COPYRIGHT: (C)2004,JPO

Description

  The present invention relates to a control mode setting device for a combustion machine such as an FF hot air heater or an oil fan heater.

  In general, combustors such as FF hot air heaters and oil fan heaters are installed at high altitudes, and in FF hot air heaters, extended supply / exhaust pipes for supply / exhaust must be extended. In such a case, there is a problem that the combustion air and the amount of fuel are delicately changed due to the influence thereof, and good combustion cannot be obtained. That is, when the apparatus is installed at a high altitude at high altitude, the density of air becomes thin and the amount of air for combustion becomes insufficient in a specification where the air remains flat, and yellow fire or soot is generated. Further, when the length of the supply / exhaust pipe is increased, the combustion air becomes insufficient due to an increase in the pipe resistance and yellow fire increases, and when the amount of combustion is reduced, dew condensation may occur on the inner wall of the pipe.

  As described above, the combustion of the combustor is affected by the installation conditions and the like, and it is necessary to change the mode of the combustion conditions and the like according to the installation and piping conditions. Therefore, in order to change the mode such as the combustion conditions, a conventional combustor is provided with a cap for partially closing the combustion air intake port, and the cap is removed or a changeover switch is provided on the back of the combustion device. The installation condition is changed by switching the operation and replacing the component on the control board or cutting the jumper wire.

  However, in the above-described conventional configuration, in any case, the switching is troublesome, and the switching condition cannot be set many. If the setting is to be increased, for example, the number of the changeover switches is increased. There is a problem that the switching operation becomes complicated and difficult to understand as well as becoming complicated.

  That is, for example, in the case of an FF hot air heater, once it is installed, it cannot be moved immediately. Therefore, if the device body is installed in a narrow place, it is difficult to remove the cap. The back of the device is covered by a back cover, and it is difficult to switch the changeover switch because the space between the device and the wall is narrow.Furthermore, after removing the front plate of the device body, remove the control board, replace parts, and cut the jumper wires. Or other work, which was very cumbersome.

  In addition, when the removed cap was lost or moved, the control board had to be removed again and parts had to be replaced and jumper wires had to be cut, so changing the mode was very time-consuming. .

  In addition, in the case of a changeover switch, there is a problem that there is a possibility of erroneous setting such that the switch is accidentally touched during the construction to change the mode or a mode other than a construction contractor is carelessly switched.

  Furthermore, in each of the above-described configurations, the mode that can be switched is as small as two, standard and special installations. In addition, there is a problem that the configuration becomes complicated and the work becomes difficult and more complicated at that time.

  SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to facilitate switching of modes and perform good combustion according to an altitude difference and an extension pipe length.

  In order to achieve the above object, the present invention provides a combustion air supply means for supplying combustion air to a burner, a fuel supply means for supplying the same fuel, a load control unit for controlling the combustion air / fuel supply means, And a central control unit having a plurality of control conditions such as combustion air and fuel corresponding to the extension pipes; a storage unit for selecting one of the plurality of control conditions of the central control unit and writing the selected mode as mode selection information; And a setting switch provided in the section, and by entering a mode setting state in which the control conditions corresponding to the elevation and the extension pipe can be sequentially set by specifically operating the setting switch of the operation section, The corresponding mode selection information is selected from among a plurality of control conditions, and the mode selection information corresponding to the altitude and the extension pipe is set to a fuel supply mode other than the standard altitude mode and the pipe length mode. The amount and combustion by the combustion amount provided limiter lower limit of the air supply amount so as not to be lowered below a certain level, the central control unit so as to control the load based on the selected mode selection information.

  According to the above invention, it is possible to set the control condition corresponding to the elevation and the extension pipe in a mode setting state in which the setting condition can be sequentially set by the specific operation of the setting switch. By simply writing the information, the control conditions for the combustion air and fuel can be selected, that is, the mode can be changed to a mode (control conditions for the combustion air and fuel) corresponding to the elevation difference and the pipe length. The mode can be easily set, and the control conditions such as the combustion air and fuel are stored in the central control unit, and the selection information for selecting the control condition is written in the storage means. Only, that is, many modes can be set, and the usability is improved.

  In addition, the mode selection information corresponding to the altitude is provided with a limiter so that the fuel supply amount and the combustion air supply amount do not drop below a certain level in the non-standard altitude mode. Without getting up, comfortable heating is possible.

  In addition, the mode selection information corresponding to the extension piping is provided by setting a limiter at the lower limit of the fuel supply amount and the combustion air supply amount in the non-standard piping length mode so that the combustion amount cannot be reduced below a certain level. It is possible to prevent the dew condensation phenomenon on the inner wall of the pipe, which is likely to occur when the length becomes long.

  The control mode setting device of the present invention can set the control conditions corresponding to the elevation and the extension pipe to a mode setting state in which the control conditions corresponding to the elevation and the extension pipe can be sequentially set by a specific operation of the setting switch, and perform the control corresponding to the elevation and the extension pipe by a simple operation. Conditions can be set, and optimal control conditions are set for the altitude and the extension pipe, so that stable and good combustion can be maintained.

  A first aspect of the present invention corresponds to a combustion air supply unit for supplying combustion air to a burner, a fuel supply unit for supplying the same fuel, a load control unit for controlling the combustion air / fuel supply unit, and an elevation and extension pipe. A central control unit having a plurality of control conditions such as combustion air and fuel, storage means for selecting one of the plurality of control conditions of the central control unit and writing it as mode selection information, and setting provided in the operation unit. A mode setting state in which control conditions corresponding to elevation and extension piping can be sequentially set by specific operation of a setting switch of the operation unit, and mode selection information corresponding to elevation and extension piping. Is selected from among a plurality of control conditions, and the mode selection information corresponding to the elevation and the extension piping is a fuel supply amount and a combustion air supply amount in a non-standard elevation mode and a pipe length mode. The combustion amount provided limiter to the lower limit so as not to fall below a certain level, the central control unit is one which is adapted to control the load based on the selected mode selection information.

  Then, when setting the control conditions according to the elevation and the extension pipe, a mode setting state in which the control conditions corresponding to the elevation and the extension pipe can be sequentially set by a specific operation of the setting switch provided on the operation unit is set. By operating the setting switch, a plurality of control conditions provided in the central control unit are written into the storage means as mode selection information, and the load is controlled based on the selected mode selection information. It is possible to select a control condition corresponding to the elevation and the extension pipe by a simple operation.

  In addition, the mode selection information corresponding to the altitude is provided with a limiter so that the fuel supply amount and the combustion air supply amount do not drop below a certain level in the non-standard altitude mode. Without getting up, comfortable heating is possible.

  In addition, the mode selection information corresponding to the extension piping is provided by setting a limiter at the lower limit of the fuel supply amount and the combustion air supply amount in the non-standard piping length mode so that the combustion amount cannot be reduced below a certain level. It is possible to prevent the dew condensation phenomenon on the inner wall of the pipe, which is likely to occur when the length becomes long.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  In FIG. 1, reference numeral 1 denotes an operation unit of the apparatus main body, 2 denotes a power switch provided on the operation unit 1, 3 denotes the same operation switch, and 4 to 7 denote setting switches for inputting various operation conditions. The set temperature and the time for timer operation and the like can be input, and the setting switches 6 and 7 are configured to also be used for mode setting for setting combustion control conditions. Reference numeral 8 denotes a display unit provided in the operation unit 1. In this embodiment, the display unit 8 is configured to display a mode when a mode is set together with a clock.

  Reference numeral 9 denotes a central control unit which is energized when a power plug (not shown) is inserted into a power supply and is in an operating state, and outputs a control signal based on outputs from the operation switch 3 and various setting switches 4 to 7. Has become. The central control unit 9 stores a plurality of control conditions such as combustion air and fuel during combustion at each elevation and control conditions such as combustion air and fuel during combustion at each pipe length together with a predetermined control sequence. (ROM), and an operation unit (CPU) 11 for outputting a predetermined control signal based on the data from the storage unit 10 and the input data from each of the setting switches 4 to 7. It consists of.

  Reference numeral 12 denotes a load control unit which operates based on a signal from the central control unit 9; a fuel air supply unit 13 for supplying combustion air to the burner; a fuel supply unit 14 for supplying fuel to the burner; It drives and controls a load such as a hot air supply means 15 such as a fan for blowing air.

  Numeral 16 denotes a storage means (hereinafter referred to as a non-volatile memory) constituted by a non-volatile memory such as an E2PROM, which is necessary from the control conditions of each combustion air and fuel stored in the storage unit 10 of the central control unit 9. The mode selection information for selecting the control condition is written, and the mode selection information is written by operating the mode setting switches 6 and 7. That is, when the mode setting switches 6 and 7 are simultaneously pressed, the central control unit 9 enters the setting mode state. Next, when one of the mode setting switches 6 and 7 is operated, the mode selection information is stored in a non-volatile manner. The data is written in the memory 9.

  Next, the operation of the above configuration will be described. First, when a power plug is inserted into a power outlet and connected to a power source, the central control device 9 is energized and is put into an operation standby state, in which control can be performed in a sequence corresponding to the control condition of the standard control written in the storage unit 10. become.

  Next, when the setting switches 6 and 7, which also serve as the mode setting, are simultaneously pressed while the power switch 2 is not turned on and turned off, the central controller 9 enters a mode setting state on the condition of the simultaneous signal. In this state, the central control unit 9 writes the mode selection information of the pipe length to the nonvolatile memory 16 when one of the setting switches 6 is pressed, and the mode selection information of the altitude to the non-volatile memory 16 when the other setting switch 7 is pressed. , Each mode setting is performed. At this time, the central control unit 9 displays the altitude at the time of setting the altitude and the mode display of the pipe length at the time of setting the pipe length on the display unit 8 to notify the user of the mode setting status. When the power switch 2 is turned on, the mode selection information written in the nonvolatile memory 16 is read, and the setting mode is released.

  When the operation switch 3 is turned on in a state where each mode is set in this manner, the central control device 9 selects one of the control sequences stored in the storage unit 10 by the mode selection information written in the nonvolatile memory 16. The necessary sequence is selected, and the load control unit 12 is driven according to the selected sequence. The load control unit 12 controls the combustion air supply unit 13, the fuel supply unit 14, and the hot air supply unit 15 based on a signal from the central control unit 9. Drive control is performed to start combustion and perform heating by warm air.

  Hereinafter, the operation will be described in detail with reference to the flowcharts of FIGS.

  First, the installation mode processing will be described with reference to FIG. When the power supply plug is inserted and the central control device 9 is operated, it is first determined whether or not the power switch is OFF. If the power switch remains OFF, whether the setting switches 6 and 7 for mode setting are pressed is determined. Is checked, and if both are pressed, the reception timer is counted to check whether a predetermined time has elapsed. If both are pressed, the reception timer is counted, and if the predetermined time has passed, the installation mode is entered. Then, when the setting switches 6 and 7 for mode setting are no longer pressed, the reception timer is initialized and the process proceeds to the next processing.

  At this time, in this embodiment, since the setting switches 6 and 7 are simultaneously pressed, and the setting switches 6 and 7 are continuously pressed for a certain period of time until the reception timer counts up, a condition for entering the installation mode is that the installation switch is erroneously installed during construction. No more going into mode.

  Next, when entering the setting mode as described above, the mode selection information is written into the nonvolatile memory 16 by the operation shown in FIG. In the following, an example will be described in which the altitude and the pipe length are set as the writing mode, and the altitude is set to three modes and the pipe length is set to two modes. However, the mode is not limited to the number of modes described above, but is set to be more or less. Various modes other than those described above, such as the size of a room, may be used.

  In FIG. 3, when it is first confirmed that the setting mode is set, it is determined which side of the setting switches 6 and 7 has been pressed. If the setting switch 6 is set, the pipe length mode is entered and the pipe length mode is set to +1. Next, it is determined whether or not the pipe length mode is 2 or more. If the pipe length mode is 2 or more, the pipe length mode is returned to 0 (standard). If the written value is 0, 1 is written to the nonvolatile memory.

  On the other hand, if the setting switch 7 is the altitude setting mode, the altitude mode is set to +1. Next, it is determined whether or not the altitude mode is 3 or more. If the altitude mode is 3 or more, the altitude mode is returned to 0 (standard). Otherwise, a value of +1 is written, that is, written to the nonvolatile memory 16 before the mode setting process. If the stored value is 0, 1 is written to the nonvolatile memory, and if it is 1, 2 is written to the nonvolatile memory.

  Next, when the mode is set in this manner, the mode setting status is displayed on the display unit 8. The operation will be described below with reference to FIG. 4. First, it is determined whether or not the mode is the installation mode. If not, a normal display, for example, the time when not burning, the room temperature when burning, etc. Is displayed. In the installation mode, the writing status of the piping length mode is determined, the mode symbol is displayed in the lower digit of the display section, and in the next step, the writing status of the altitude is determined, and the mode symbol is displayed on the display section. Display in the upper digit. That is, the setting status of the pipe length and the elevation mode is displayed using the upper and lower digits of the display unit.

  When the mode setting of the altitude and the pipe length is performed as described above and none of the setting switches 6 and 7 is operated, the reception timer is initialized as shown in FIG. 2 and the process proceeds to the next processing. When the power switch 2 is turned on, the installation mode is released from the installation mode, and the mode selection information stored in the nonvolatile memory 16 is read. Then, according to the mode selection information written therein, a standby state for performing control such as combustion based on the sequence stored in the storage unit 10 is established.

  In this embodiment, the mode selection information is read from the non-volatile memory 16 when the power switch is turned on. However, the mode selection information may be read at the time of a combustion / fuel / hot air supply control process described later, or It may be read when connected to a power supply via a plug, or may be set when necessary.

  The mode setting of the altitude and the pipe length is completed as described above. That is, in this control mode setting device, after the device main body is installed, the setting condition modes such as the altitude and the pipe length can be set simply by operating the setting switches 6 and 7 provided on the operation unit 1 of the device main body. It can be set easily without any troublesome work as in the past. Further, the mode setting is such that the control conditions are stored in the storage unit 10 in the central control device 9 and selected from the control conditions. Therefore, the number of mode settings is necessary without increasing the number of switches and other parts. Can be prepared, and the setting status is displayed on the display unit 8 at the time of setting, so that the setting can be made easily and accurately without error.

  Next, after the mode setting of the altitude and the pipe length is completed as described above, when the operation switch 3 is turned on, the central controller 9 stores the data in the storage unit 10 according to the mode selection information described in the nonvolatile memory 16. Control such as combustion in accordance with the sequence.

  Hereinafter, the fuel supply (VP) control flow in FIG. 5, the combustion air (BM) supply flow in FIG. 6, and the hot air supply (FM) in FIG. This will be described using a control flow.

First, the control operation when the altitude mode is set will be described. First, the altitude mode set for each flow is determined, and the altitude mode is specified as 0 (for example, 500 m or less = standard), 1 (for example, 500 m or more) or 2 (for example, 1000 m or more). If the altitude mode is 1 or 2 other than the standard, the combustion air supply amount is not corrected and the drive is performed at the standard, and the specific correction rates A or B% and C are set for both the fuel supply amount and the hot air supply amount. Or, multiply by D% and correct for decrease. That is, as the altitude increases and the air density decreases, the amount of fuel supplied by the fuel supply means is reduced to reduce the amount of combustion, and at the same time, the amount of hot air supplied is reduced to reduce air shortage. Supplement so that good combustion can be maintained. As a result, good combustion can be ensured even when the equipment is installed at different altitudes, and there is no increase in the blowing noise unlike the one that increases the amount of combustion air supplied. Heating becomes possible.

  In addition, when the altitudes are 1 and 2, certain corrections a and b are set as limiters so that the fuel supply amount and the combustion air supply amount do not drop below a certain value. The configuration is such that the heating capacity shortage due to the decrease in the combustion amount and the hot air amount does not occur. FIG. 8 shows the relationship between the fuel supply amount (VP frequency) and the combustion air supply amount (BM rotation speed) set in the altitude mode.

  Next, the control operation when the pipe length mode is set will be described. After the elevation mode processing in FIG. 5 (FIGS. 5 to 7) is completed, the pipe length mode is set to 0 (for example, the extended pipe length 0 to 2 m). 1 (Extended pipe length 2m or more) is specified. When the pipe length mode is other than the standard one, the increase correction is performed by multiplying only the combustion air supply amount by a specific correction rate E%. That is, the amount of combustion air, which tends to be short due to a long pipe length, is compensated for, and good combustion can be maintained. Then, the lower limit of each of the combustion air supply amount, the fuel supply amount, and the hot air supply amount is increased to a value obtained by adding a specific value c to the limiter value regulated in the altitude mode. That is, the amount of combustion is not reduced below a certain value so that dew condensation, which is likely to occur due to an increase in the pipe length, does not occur. FIG. 9 shows the relationship between the fuel supply amount (VP frequency) and the combustion air supply amount (BM rotation speed) set in the pipe length mode.

  By the way, in the above embodiment, the non-volatile memory is used as the storage means 16. However, this may be constituted by a RAM provided in the central control device 9 as shown by a broken line in FIG. Both modes may be used in combination. In the case of the combined mode, the mode selection information is written into the RAM together with the nonvolatile memory 16 and the mode selection information is usually read from the RAM, so that the reading speed of the mode selection information can be reduced. Can be hastened.

  In the case where the storage means 16 is constituted by a RAM, if a backup power supply for holding the stored contents is provided, an effect which cannot be obtained with a simple RAM as in the case of the nonvolatile memory can be expected. That is, in the case of the RAM with a backup power supply or the nonvolatile memory, even if a power failure occurs or the power plug is unplugged from the outlet and the connection with the power supply is established, the RAM with the backup power supply or the nonvolatile The mode selection information stored in the memory continues to be stored and held, so that it is not necessary to write the mode selection information again, and the usability is improved.

  In the above embodiment, the setting switches 6 and 7 are also used as setting switches for temperature setting, timer time setting, and the like in order to simplify the configuration. However, this is achieved by providing a switch dedicated to mode setting. Alternatively, the two setting switches 6 and 7 may be pressed at the same time, but if one setting switch is kept pressed for a predetermined time, the setting mode may be entered, and in either case, erroneous setting can be prevented. .

  Further, in this embodiment, the mode is set, and then the pipe length mode and the altitude mode are sequentially set to improve the operability. However, each may be separately set in the mode setting state. By doing so, it is possible to reduce the possibility of setting the pipe length mode and the elevation mode by mistake.

  Further, in this embodiment, the mode selection information is displayed using a display unit such as a clock. However, a dedicated display unit may be provided, and the display may be a display using a plurality of LEDs. Various forms are conceivable. The display unit may display the actual altitude or the number of the pipe length instead of the symbol.

1 is a block diagram of a control mode setting device for a combustor according to an embodiment of the present invention. Flow chart showing installation mode processing of the control mode setting device Flow chart showing the mode information writing operation of the control mode setting device Flow chart showing mode display processing of the control mode setting device Flow chart showing fuel supply processing of the control mode setting device Flow chart showing a combustion air supply process of the control mode setting device Flow chart showing hot air supply processing of the control mode setting device Characteristic diagram of altitude correction in altitude mode set by the control mode setting device Characteristic diagram of pipe length correction in pipe length mode set by the control mode setting device

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Operation part 6 Setting switch 7 Setting switch 8 Display part 9 Central control part 12 Load control part 13 Combustion air supply means 14 Fuel supply means 15 Hot air supply means 16 Storage means (nonvolatile memory)

Claims (1)

Combustion air supply means for supplying combustion air to the burner, fuel supply means for supplying the same fuel, a load control unit for controlling the combustion air / fuel supply means, and combustion air / fuel corresponding to elevation and extension piping. A central control unit having a plurality of control conditions such as, a storage unit for selecting one of the plurality of control conditions of the central control unit and writing it as mode selection information, and a setting switch provided in an operation unit, By entering the mode setting state in which the control conditions corresponding to the altitude and the extension pipe can be sequentially set by specifying the setting switch of the operation unit, the mode selection information corresponding to the elevation and the extension pipe is Mode selection information corresponding to the altitude and the extension piping is limited to the lower limit of the fuel supply amount and the combustion air supply amount in the non-standard elevation mode and pipe length mode. The combustion rate provided over so as not be lowered below a certain level, the control mode setting device of the burner the control center which is adapted to control the load based on the selected mode selection information.

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