WO2015182331A1

WO2015182331A1 - Control method, control device, program, and recording medium

Info

Publication number: WO2015182331A1
Application number: PCT/JP2015/063033
Authority: WO
Inventors: 若浩川井; 聖文別所
Original assignee: オムロン株式会社
Priority date: 2014-05-26
Filing date: 2015-04-30
Publication date: 2015-12-03
Also published as: JP2015225711A; JP6292031B2; TWI634299B; TW201606252A

Abstract

A heater control unit (33) reduces power to be supplied to a heater (12) after an integration value of power consumption quantities of the heater (12) exceeds a predetermined threshold value, said power consumption quantities having been measured from a start time point of a predetermined period of time to any time point in the predetermined period of time. Consequently, a rapid increase of a power consumption quantity at the time of increasing the temperature of the heating device that is provided with the single heater is suppressed without requiring a system having a complicated configuration.

Description

Control method, control device, program, and recording medium

The present invention relates to a control method, a control device, a program, and a recording medium for controlling temperature rise of a heating device provided with a heater.

For various facilities that require large amounts of power (for example, factories or office buildings that use high-voltage power), the basic charge for power is contracted with the power supplier based on the maximum allowable amount of power used in the facility. is doing. This maximum allowable amount is generally called demand contract power. The basic power charge based on demand contract power is applied as long as the power consumption in the facility does not exceed the contract value. However, if the power consumption exceeds the demand contract power for only about 30 minutes, the basic charge for the following month will be greatly increased. Therefore, conventionally, many various techniques for monitoring power consumption and suppressing power demand so that the power consumption does not exceed demand contract power have been proposed.

On the other hand, when mounting electronic components on a printed circuit board, a heating device such as a solder bath is used. The temperature rise in such a heating apparatus is performed by continuously supplying power to the heater until the heating furnace reaches a set temperature. An example is shown in FIG. FIG. 6 is a diagram showing a waveform of the power consumption amount of the heater at the time of starting the temperature in the heating apparatus that receives temperature adjustment according to the related art. In the example shown in this figure, during the temperature rising period 101, the continuous supply of power to the heater (waveform 103) causes the integrated value of power consumed in the heater (waveform 104) to rise sharply. In the temperature adjustment period 102 after the heater temperature reaches the set value, based on the heater temperature measured by the temperature sensor, the power supplied to the heater is appropriately turned on or off (waveform 105), whereby the heater The increase in the integrated value of the power consumption becomes moderate.

Usually, the heating device in the facility is started by turning on the heaters all at once prior to the start of production. If a plurality of heating furnaces are started up at the same time, the accumulated power consumption obtained by integrating the power consumption of individual heaters rapidly increases, which may cause a problem that the power consumption of the entire facility exceeds the demand contract power. In view of this, various techniques have been proposed in order to solve such a problem, and suppress a rapid increase in power consumption when each heating furnace is started up.

Patent Document 1 discloses a heater start-up method for a reflow apparatus characterized in that the start-up time of each heater is shifted when starting up a reflow apparatus in which a plurality of heaters are arranged in a furnace. .

Patent Document 2 discloses a method of starting a heating furnace by forming a group in which the heaters of each heating zone are combined and setting a priority for each group.

In Patent Document 3, the relationship between the output of the heating unit in the furnace and the temperature rise in the furnace is preliminarily determined based on the output-temperature characteristic information obtained for each zone, temperature measurement information, and temperature setting information. An electric furnace that controls the power to be supplied for each zone is disclosed.

Japanese Patent Publication “Japanese Patent Laid-Open No. 7-212027 (published on August 11, 1995)” Japanese Patent Publication “JP 2007-78307 (published March 29, 2007)” Japanese Patent Publication “Japanese Patent Laid-Open No. 2010-286179 (published on December 24, 2010)”

However, the conventional techniques described above have the following problems. First, these technologies are applied to a heating device in which the heating furnace is composed of a plurality of heating zones and a heater is prepared for each heating zone. Can not. In addition, it is necessary to clarify the heating characteristics of each heating zone and the characteristics of each heater in advance by experiments or the like. Furthermore, in order to respond to a change in the heating state in the heating device, for example, a change in the temperature rise time of each heating zone caused by the residual heat of each heating zone, the surrounding environment, etc., or a change in the heating capacity of the heater, etc. A control system with a complicated configuration is required.

The present invention has been made to solve the above-described problems. The object is to provide a control method, a control device, a program, and a control method for suppressing a rapid increase in power consumption at the time of temperature rise of a heating device including a single heater without requiring a system having a complicated configuration. It is to provide a recording medium.

In order to solve the above problems, a control method according to the present invention provides:
A control method for controlling a temperature rise in a heating device including a heater,
A determination step of determining whether an integrated value of the power consumption amount of the heater measured from a start time at a predetermined time to any time at the predetermined time has reached a predetermined threshold;
In the determination step, when it is determined that the integrated value has reached the predetermined threshold value, a reduction step of reducing the power supplied to the heater from any one of the time points to the end time point in the predetermined time It is characterized by including.

According to the control method of the present invention, it is possible to suppress an abrupt increase in power consumption when the temperature of a heating apparatus including a single heater is raised without requiring a system having a complicated configuration.

It is a block diagram which shows the principal part structure of the control system which concerns on 1st Embodiment of this invention, and each apparatus with which it is provided. It is a flowchart which shows the flow of the temperature rise control process in the control system which concerns on 1st Embodiment of this invention. (A) is a figure which shows typically the waveform of the electric energy consumption of a heater at the time of temperature rise in the solder tank which does not receive control by the electric power control apparatus which concerns on 1st Embodiment of this invention, (b) These are figures which show typically the waveform of the electric energy consumption of a heater at the time of temperature rise in the solder tank which receives control by the electric power control apparatus which concerns on 1st Embodiment of this invention. (A) is a figure which shows the waveform of the electric power consumption of a heater at the time of temperature rise in the small solder tank which does not receive control by the electric power control apparatus which concerns on 1st Embodiment of this invention, (b) is this It is a figure which shows the waveform of the electric energy consumption of a heater at the time of temperature rise in the solder tank which receives control by the control system which concerns on 2nd Embodiment of invention. (A) is a figure which shows the waveform of the electric power consumption of a heater at the time of temperature rise in the small solder tank which does not receive control by the electric power control apparatus which concerns on 1st Embodiment of this invention, (b) is this It is a figure which shows the waveform of the electric energy consumption of a heater at the time of temperature rise in the small solder tank which receives control by the control system which concerns on 2nd Embodiment of invention. It is a figure which shows the waveform of the electric energy consumption of a heater at the time of temperature starting in the heating apparatus which receives the temperature adjustment which concerns on a prior art.

Embodiment 1
A first embodiment according to the present invention will be described below with reference to FIGS.

(Configuration of control system 50)
FIG. 1 is a block diagram showing a main configuration of a control system 50 according to the present embodiment and each device provided therein. As shown in this figure, the control system 50 includes a heating device 1, a power control device 3, and a temperature adjustment device 2.

The heating device 1 is realized as various heating devices such as a solder bath used when electronic components are mounted on a printed circuit board. As shown in FIG. 1, the heating device 1 includes a heating furnace 11 and a heater 12. The heater 12 receives heat to generate heat and heats the heating furnace 11. The heating furnace 11 solders the electronic component to the printed circuit board by heating the printed circuit board disposed therein.

The temperature adjusting device 2 controls the temperature of the heating device 1 when the temperature of the heating device 1 is raised. As shown in FIG. 1, the temperature adjustment device 2 includes a temperature sensor 21 and a heater control unit 22. The temperature sensor 21 measures the temperature in the heating furnace 11. The heater control unit 22 controls the power supply to the heater 12 based on the temperature measurement result by the temperature sensor 21, thereby controlling the temperature in the heating furnace 11 as a result.

The power control device 3 controls the amount of power consumed by the heater 12 when the temperature of the heating device 1 is raised. As shown in FIG. 1, the power control device 3 includes a wattmeter 31, a timer 32, and a heater control unit 33 (determination unit, reduction unit). The wattmeter 31 measures the power consumption of the heater 12. The timer 32 measures the elapsed time. The heater control unit 33 controls power supply to the heater 12 based on the integrated value of the power consumption amount of the heater 12 within a predetermined time.

The control system 50 performs the temperature adjustment based on the temperature measured from the heating furnace 11 and the power consumption control based on the integrated value of the power consumption measured from the heater 12 on the same heating apparatus 1. The power control device 3 controls the power consumption of the heater 12 until the temperature in the heating furnace 11 reaches a predetermined heating temperature after the temperature raising of the heating device 1 is started. After the temperature in the heating furnace 11 reaches a predetermined heating temperature, the temperature control of the heating furnace 11 by the temperature control device 2 is performed.

(Control processing flow)
FIG. 2 is a flowchart showing the flow of temperature rise control processing in the control system according to the first embodiment of the present invention. The contents of the control by the control system 50 when the temperature of the heating device 1 is raised will be described below in more detail with reference to FIG. As shown in FIG. 2, the condition values used for the control process in the control system 50 are set in the temperature control device 2 and the power control device 3 (S1). Specifically, a threshold for the power consumption amount of the heater 12 and a predetermined time are set in the power control device 3. On the other hand, the heating temperature of the heating furnace 11 is set in the temperature adjusting device 2. The threshold for the power consumption is an integrated value of the power consumption allowed for the heater 12 within a predetermined time. The predetermined time is a unit time for controlling the power supply to the heater 12. In the present embodiment, the threshold for the power consumption is 4 kWh, and the time is 20 minutes. The heating temperature is a temperature suitable for heating the printed circuit board disposed inside the heating furnace 11.

After setting these condition values, the heating device 1 turns on the heater 12 (S2). Thereby, power supply to the heater 12 is started, and the heater 12 heats the heating furnace 11 by generating heat according to the amount of supplied power. As a result, the temperature in the heating furnace 11 rises. Immediately after the heater 12 is turned on, the timer 32 starts measuring the elapsed time after the heater 12 is turned on (S3). Moreover, the wattmeter 31 starts measuring the power consumption of the heater 12 (S4). The wattmeter 31 constantly measures the power consumption of the heater 12 and records the measurement result (instantaneous value of power consumption) at each time in a memory (not shown) in the power control device 3 as needed.

Next, the temperature sensor 21 measures the temperature in the heating furnace 11 (S5), and notifies the heater control unit 22 of the measurement result. The heater control unit 22 determines whether or not the measured temperature of the heating furnace 11 has exceeded the set heating temperature (S6). When S6 is YES, temperature control of the heater control unit 22 by the temperature adjustment device 2 is started. Specifically, it is as follows.

First, the heater control unit 22 controls the heater 12 so as to stop the power supply to the heater 12. As a result, the heater 12 is turned off (S7). After the heater 12 is turned off, the temperature sensor 21 measures the temperature in the heating furnace 11 (S8), and notifies the heater control unit 22 of the measurement result. The heater control unit 22 determines whether or not the measured temperature of the heating furnace 11 exceeds the set heating temperature (S9). When S9 is YES, the flow shown in FIG. 2 returns to S8, and the temperature sensor 21 measures the temperature of the heating furnace 11 again. Thus, the temperature control apparatus 2 waits until the temperature of the heating furnace 11 falls below the heating temperature. When S9 is NO, that is, when the measured temperature of the heating furnace 11 is lower than the heating temperature, the heater control unit 22 controls the heater 12 so that the power supply to the heater 12 is resumed. As a result, the heater 12 is turned on, and the flow of FIG. 9 returns to S2.

As described above, in the control system 50, when the temperature in the heating furnace 11 reaches the heating temperature when the temperature of the heating apparatus 1 is raised, the temperature adjustment process (S2, S5, S6˜) of the heating furnace 11 by the temperature adjustment apparatus 2 is performed. S9) is repeated. Thereby, the temperature in the heating furnace 11 is stably maintained near the heating temperature.

On the other hand, when S6 is NO, that is, when the measured temperature of the heating furnace 11 does not exceed the heating temperature, the power consumption control processing of the heater 12 by the power control device 3 is started. Specifically, it is as follows.

First, the temperature control device 2 notifies the power control device 3 that the measured temperature of the heating furnace 11 does not exceed the heating temperature. When the power control device 3 receives this notification, the timer 32 notifies the heater control unit 33 of the start time and the current time of the elapsed time currently being measured. The heater control unit 33 acquires a measurement result (instantaneous value) of the power consumption of the heater 12 at each time from the notified start time to the current time from a memory (not shown). The heater control unit 33 calculates an integrated value of the power consumption amount of the heater 12 within the elapsed time by adding all the acquired measurement results (S10).

The heater controller 33 determines whether or not the calculated integrated value of power consumption has reached a predetermined threshold (S11). When S11 is NO, the flow shown in FIG. 2 returns to S5. That is, the power control device 3 notifies the temperature adjustment device 2 that the integrated value of the power consumption amount of the heater 12 has not reached the threshold value. In response to this, the temperature sensor 21 measures the temperature in the heating furnace 11 (S5). Thus, until the integrated value of the power consumption of the heater 12 within the elapsed time reaches the threshold value, the heater 12 is kept on, whereby the integrated value of the power consumption of the heater 12 continues to increase.

On the other hand, when S11 is YES, that is, when it is determined that the integrated value of the power consumption of the heater 12 has reached the threshold value, the heater control unit 33 turns off the heater 12 so as to stop the power supply to the heater 12. Control. As a result, the heater 12 is turned off (S12).

Next, the timer 32 determines whether or not the elapsed time during measurement exceeds a predetermined time (S13). When S13 is NO, the power control device 3 repeats the determination of S13. That is, the power control device 3 stands by until the elapsed time exceeds the time.

When S13 is YES, that is, when the elapsed time since the heater 12 is turned on exceeds a predetermined time, the timer 32 resets the elapsed time during measurement (S14). In addition, the heater control unit 33 controls the heater 12 so that the power supply to the heater 12 is resumed. As a result, the heater 12 is turned on, and the flow of FIG. 9 returns to S2. Immediately after this, the timer 32 starts measuring the elapsed time again (S3).

As described above, until the measured temperature of the heating furnace 11 exceeds the heating temperature, the control processing (S2, S3, S10 to S14) of the power consumption of the heater 12 by the power control device 3 is repeatedly performed. Thereby, the integrated value of the power consumption amount of the heater 12 within a predetermined time is limited to a predetermined threshold value.

(Comparison result)
(A) of FIG. 3 is a figure which shows typically the waveform of the electric power consumption of the heater 12 at the time of temperature starting in the heating apparatus 1 which does not receive control by the electric power control apparatus 3 which concerns on this embodiment. FIG. 3B is a diagram schematically illustrating a waveform of the power consumption amount of the heater 12 when the temperature is raised in the heating apparatus 1 that is controlled by the power control apparatus 3 according to the present embodiment. 3 (a) and (b), the vertical axis represents the integrated value (kWh) of the power consumption of the heater 12, while the horizontal axis represents the elapsed time from the start of the temperature rise of the heating device 1. (Minutes).

3B, the threshold value of the integrated value of the power consumption of the heater 12 is 4 kWh, and the predetermined time that is a reference unit for performing power control is 20 minutes.

Suppose there is a time lag of 5 minutes from the start of the temperature rise of the heating device 1 to the start of power supply to the heater 12. As a result, as shown in FIG. 3 (a), in the heating device 1 that is not controlled by the power control device 3, the power supply to the heater 12 is started 5 minutes after the start of temperature rise. Thus, the heater 12 starts to consume power. In FIG. 3A, the waveform 41 shows the passage of time of the power consumption (instantaneous value) supplied to the heater 12. Until the temperature of the heating furnace 11 reaches a predetermined heating temperature, the same amount of electric power is continuously supplied to the heater 12. Therefore, the power consumption amount of the heater 12 at each time after the power starts to be supplied to the heater 12 maintains a constant value.

3 (a), a waveform 42 shows the elapsed time of the integrated value of the power consumption of the heater 12 after the supply of power to the heater 12 is started. For comparison with (b) of FIG. 3, the integrated value is displayed in (a) of FIG. 3 in such a manner that it is reset to zero every time (every 20 minutes). As shown in the waveform 42, the integrated value of the power consumption of the heater 12 reaches 4 kWh 15 minutes after the start of power supply to the heater 12 (20 minutes after the start of temperature rise). In the example of FIG. 3A, the heating device 1 is not controlled by the power control device 3, so that the heater 12 is not turned off thereafter. Thereby, since the power consumption of the heater 12 is not suppressed for 5 minutes between the start of the temperature rise and the start of the 25th minute, the integrated value of the power consumption greatly exceeds 4 kWh in this 5 minutes. Continue to rise. After the end of the time (25 minutes after starting the temperature rise), the integrated value of the power consumption is reset to zero.

In FIG. 3B, the time elapsed of the power consumption (instantaneous value) supplied to the heater 12 is set as a waveform 43, and the power consumption of the heater 12 after the start of power supply to the heater 12 is also shown. The elapsed time of the integrated value is shown as a waveform 44, respectively. As shown in the

waveform

44, 15 minutes after the start of power supply to the heater 12, the integrated value of the power consumption amount of the heater 12 from the start of the predetermined time to 15 minutes later reaches 4 kWh. . In the example of FIG. 3B, the heating device 1 is controlled by the power control device 3, so that the heater 12 is turned off thereafter. As a result, the power consumption of the heater 12 becomes zero for 5 minutes between 20 minutes and 25 minutes after the start of temperature rise, and thus the integrated value of the power consumption is maintained at 4 kWh in these 5 minutes. . After the end of time (25 minutes after the start of temperature rise), the integrated value of power consumption is reset to zero.

As described above, in the heating device 1 that is controlled by the power control device 3, the integrated value of the power consumption amount of the heater 12 greatly exceeds the threshold value of 4 kWh in the last 5 minutes within a predetermined time (20 minutes). Continue to rise. On the other hand, in the heating device 1 that is controlled by the power control device 3, the integrated value of the power consumption of the heater 12 does not exceed the threshold value of 4 kWh at any time point within a predetermined time. Therefore, the heating device 1 can suppress a sudden increase in the integrated value of the power consumption amount of the heater 12 when the temperature is raised by being controlled by the power control device 3.

(Advantages of this embodiment)
As described above, the control system 50 executes a combination of the normal temperature adjustment processing by the temperature adjustment device 2 and the power consumption control processing of the heater 12 by the power control device 3 when the temperature of the heating device 1 is raised. To do. By this device, the control system 50 can enjoy the following advantages.

(1) A sudden increase in power consumption can be suppressed by forcibly reducing the power consumption of the heater 12 when the temperature of the heating device 1 is raised.

Further, the temperature adjustment processing of the heating device 1 by the temperature adjustment device 2 is performed independently of the power consumption amount control processing of the heater 12 by the power control device 3. Therefore, conditions related to the temperature adjustment process such as the set value of the heating temperature in the heating device 1, the heat capacity of the heating furnace 11, and the performance of the heater 12 do not affect the power consumption control process. Thereby, the following advantage can be enjoyed.

(2) The heating characteristics of the heating device 1 such as the heat capacity of the heating device 1 and the performance of the heater 12 need not be measured in advance.

(3) A control system with a complicated configuration is not required to cope with heating conditions that change with time in the heating apparatus 1 such as deterioration of the capability of the heater 12.

(4) The configuration of the power control device 3 can be simplified, including the wattmeter 31, the timer 32, and the heater control unit 33. Thereby, the power control device 3 can control the power consumption amount of the heater 12 at the time of temperature rise in the heating device 1 including the single heater 12.

(5) The control system 50 according to the present embodiment can be configured simply by adding the power control device 3 to the existing control system.

(Experimental result)
Below, the experimental result using the solder tank which mounts an electronic component in a printed circuit board as the heating apparatus 1 is demonstrated.

(A) of FIG. 4 is a figure which shows the waveform of the electric energy consumption of the heater 12 at the time of temperature rise in the solder tank which does not receive control by the electric power control apparatus 3 which concerns on this embodiment. FIG. 4B is a diagram illustrating a waveform of the power consumption amount of the heater 12 when the temperature is raised in the solder bath that is controlled by the power control device 3 according to the present embodiment. 4 (a) and 4 (b), the vertical axis represents the integrated value (kWh) of the power consumption of the heater 12, while the horizontal axis represents the elapsed time from the start of the solder bath temperature rise (kWh). Minutes). In this experiment, the threshold value of the integrated value of power consumption is 4 kWh, and the reference time for performing power control is 20 minutes.

As shown in FIG. 4A, the heater 12 is continuously supplied with the same power until the temperature of the heater 12 reaches the heating temperature (waveform 51). Therefore, the power consumption amount of the heater 12 at each time maintains a constant value. In the example of this figure, since the heating device 1 is not controlled by the power control device 3, the integrated value after the integrated value of the power consumption of the heater 12 reaches the threshold (4 kWh) at any point in time for 20 minutes. Continues to rise above 4 kWh (waveform 52). For comparison with FIG. 4B, the integrated value is displayed in FIG. 4A in such a manner that the integrated value is reset to zero every 20 minutes.

Approximately 110 minutes after starting the temperature rise of the heating device 1, the measured temperature of the heating furnace 11 reaches the heating temperature. After this, the heater 12 is turned off for a while. Then, the temperature control of the heater control unit 22 by the temperature control device 2 is started, and the heater 12 is repeatedly turned on and off based on the measured temperature of the heater control unit 22 (waveform 53).

On the other hand, as shown in FIG. 4B, when the heating device 1 is controlled by the power control device 3, the integrated value of the power consumption amount of the heater 12 reaches the threshold value (4 kWh) at any point in time for 20 minutes. After reaching, the amount of power supplied to the heater 12 is reduced to zero (waveform 54). As a result, the integrated value of the power consumption of the heater 12 is maintained at 4 kWh for the remaining time until the 20 minutes are completed (waveform 55).

4B, the elapsed time of the power consumption (instantaneous value) supplied to the heater 12 is set as a waveform 54, and the integrated value of the power consumption of the heater 12 after the start of power supply to the heater 12 is started. Are respectively shown as a waveform 55. In the example of FIG. 4B, since the heating device 1 is controlled by the power control device 3, the integrated value of the power consumption amount of the heater 12 reaches the threshold value (4 kWh) at any point in time for 20 minutes. The integrated value of power consumption does not exceed 4 kWh.

Even when the heating device 1 is controlled by the power control device 3, the measured temperature of the heating furnace 11 reaches the heating temperature about 110 minutes after the start of temperature rise. After this, the heater 12 is turned off for a while, and then the temperature control of the heater control unit 22 by the temperature adjusting device 2 is started, and the heater 12 is repeatedly turned on and off based on the measured temperature of the heater control unit 22 (waveform) 56). The waveform 56 is essentially the same as the waveform 53 obtained only by normal temperature adjustment.

As described above, according to the actual experimental results, the power control of the heater 12 by the power control device 3 causes a sudden increase in the integrated value of the power consumption of the heater 12 when the temperature of the heating device 1 is raised. Was shown to prevent.

Note that the threshold value of the integrated value of power consumption is not limited to 4 kWh, and can be any value. The smaller this value is, the more the increase in the integrated value of power consumption can be suppressed.

The predetermined time, which is a unit time for power control, is not limited to 20 minutes, but may be any length of time. The longer this time is, the more the increase in the integrated value of power consumption can be suppressed. In particular, if the predetermined time is set as a reference time for a power supply contract with a power supplier set for a facility such as a factory where the heating device 1 is installed, the facility where the heating device 1 is installed. This can contribute to preventing the overall power from exceeding the demand contract power.

The heater control unit 33 is required to always make the power supply to the heater 12 zero from the time when the integrated value of the power consumption amount of the heater 12 reaches the threshold value for a predetermined time to the end time of the predetermined time. No, the power supply to the heater 12 may be reduced to a value greater than zero. Here, reduction means that the amount of power supplied to the heater is made smaller than the amount of power supplied before the integrated value reaches the threshold value. In addition, it is preferable to reduce the power supply to the heater 12 to zero because a rapid increase in the integrated value can be suppressed to the maximum.

[Embodiment 2]
A second embodiment according to the present invention will be described below with reference to FIG. In addition, the same code | symbol is attached | subjected to each member which is common in 1st Embodiment mentioned above, and detailed description is abbreviate | omitted.

In this embodiment, an experimental result using a small solder bath as the heating device 1 will be described. This small solder bath is an apparatus that has been extended for about 110 minutes until the temperature in the heating furnace 11 is stabilized as a result of changes in temperature adjustment conditions due to changes in the characteristics of the heater 12.

(A) of FIG. 5 is a figure which shows the waveform of the electric power consumption of a heater at the time of temperature rise in the small solder tank which does not receive control by the electric power control apparatus 3 which concerns on 2nd Embodiment of this invention. FIG. 5B is a diagram illustrating a waveform of the power consumption amount of the heater 12 at the time of temperature rise in the small solder bath that is controlled by the power control device 3 according to the second embodiment of the present invention. In (a) and (b) of FIG. 5, the vertical axis represents the integrated value (kWh) of the power consumption of the heater 12, while the horizontal axis represents the elapsed time since the temperature rise of the heating device 1 was started. (Minutes).

In (a) and (b) of FIG. 5, the integration of the continuous power consumption from the time when the power consumption in the heater 12 is started without resetting the integrated value of the power consumption of the heater 12 every time has elapsed. The waveform of the value is shown. In FIG. 5B, the threshold value of the integrated value of power consumption is 0.2 kWh, and the predetermined time for controlling the power consumption is 7 minutes.

As shown in FIG. 5A, in a small solder bath that is not controlled by the power control device 3 when the temperature is raised, the integrated value of the power consumption of the heater 12 increases rapidly and linearly (waveform) 61). About 35 minutes after the start of temperature rise, the temperature in the heating furnace 11 reaches a predetermined heating temperature. Since power supply to the heater 12 is temporarily stopped at this time, the integrated value of the power consumption of the heater 12 does not increase any more. Approximately 50 minutes after the start of temperature rise, the temperature control of the heater 12 by the temperature control device 2 starts (waveform 62). This temperature control continues until the temperature in the heating furnace 11 is stabilized. The temperature control continues until about 110 minutes after the start of the temperature rise. As described above, this is because the characteristics of the heater 12 have changed.

As shown in FIG. 5 (b), the electric power consumption of the heater 12 is controlled by the electric power control device 3 every 7 minutes after the electric power consumption in the heater 12 is started. The power control device 3 stops power supply to the heater 12 at the time point 6 minutes after the integrated value of the power consumption amount of the heater 12 reaches 0.2 kWh in the first 7 minutes. Thereby, the integrated value of the power consumption of the heater 12 is maintained at about 0.2 kWh (waveform 63). This stoppage lasts until one minute after the first seven minutes are over. When the first seven minutes are completed, the power control device 3 resumes the power supply to the heater 12 again. Thereby, the integrated value of the power consumption of the heater 12 rises again. In the control for the next 7 minutes, the threshold value in the power control device 3 is set to 0.4 kWh. That is, the threshold increases by 0.2 kWh as time elapses.

When 6 minutes of the next 7 minutes have elapsed, the integrated value of the power consumption of the heater 12 reaches 0.4 kWh. At this time, the power control device 3 stops the power supply of the heater 12. Thereafter, the power control device 3 repeats the same control. As a result, the electric power supplied to the heater 12 is repeatedly stopped for the last approximately one minute each time (7 minutes) elapses. About 40 minutes after the start of temperature rise, the temperature in the heating furnace 11 reaches a predetermined heating temperature. Since power supply to the heater 12 is temporarily stopped at this time, the integrated value of the power consumption of the heater 12 does not increase any more. Approximately 75 minutes after the start of temperature rise, temperature control of the heater 12 by the temperature control device 2 starts (waveform 64). This temperature control continues until the temperature in the heating furnace 11 is stabilized. The temperature control continues until about 80 minutes after the start of temperature rise.

As described above, in the small solder tank that is controlled by the power control device 3, a rapid increase in the integrated value of the power consumption of the heater 12 can be suppressed. As a result, the time until the measured temperature of the heating furnace 11 reaches the predetermined heating temperature is longer than when the control by the power control device 3 is not performed. On the other hand, the time until the measured temperature of the heating furnace 11 is stabilized is shorter than when the control by the power control device 3 is not performed. This is because the control by the power control device 3 is not affected by the change in characteristics of the heater 12, so that the heating furnace 11 is overheated by the heater 12 after the temperature in the heating furnace 11 reaches a predetermined heating temperature. This is because the temperature rise can be kept low.

As described above, according to the control system 50 according to the present embodiment, the temperature adjustment device 2 has changed due to a change in the heating environment of the heating device 1 such as a characteristic change or failure of the heater 12 or a heat capacity change of the heating furnace 11. Even when an abnormality occurs when the temperature is raised so that appropriate temperature adjustment of the heating furnace 11 cannot be performed, the influence can be suppressed small.

[Example of software implementation]
The control block (particularly) of the power control device 3 may be realized by a logic circuit (hardware) formed in an integrated circuit (IC chip) or the like, or realized by software using a CPU (Central Processing Unit). May be.

In the latter case, the power control device 3 includes a CPU that executes instructions of a program that is software that realizes each function, and a ROM (Read Only Memory) in which the program and various data are recorded so as to be readable by a computer (or CPU). Alternatively, a storage device (these are referred to as “recording media”), a RAM (Random Access Memory) for expanding the program, and the like are provided. And the objective of this invention is achieved when a computer (or CPU) reads the said program from the said recording medium and runs it.

As the recording medium, a “non-temporary tangible medium” such as a tape, a disk, a card, a semiconductor memory, a programmable logic circuit, or the like can be used. The program may be supplied to the computer via an arbitrary transmission medium (such as a communication network or a broadcast wave) that can transmit the program. The present invention can also be realized in the form of a data signal embedded in a carrier wave, in which the program is embodied by electronic transmission.

[Summary]
In order to solve the above problems, a control method according to the present invention provides:
A control method for controlling a temperature rise in a heating device including a heater,
A determination step of determining whether an integrated value of the power consumption amount of the heater measured from a start time at a predetermined time to any time at the predetermined time has reached a predetermined threshold;
In the determination step, when it is determined that the integrated value has reached the predetermined threshold value, a reduction step of reducing the power supplied to the heater from any one of the time points to the end time point in the predetermined time It is characterized by including.

According to the above configuration, the control method according to the present invention ends the predetermined time after the integrated value of the power consumption amount of the heater reaches the predetermined threshold at any time point within the predetermined time. Until the time, the power supplied to the heater is reduced. Thereby, it is possible to suppress a rapid increase in the integrated value of the power consumption of the heater when the temperature of the heating device is raised.

Further, since the control method according to the present invention controls the heater based on the integrated value of the power consumption amount of the heater, the heating device does not need to include a plurality of heaters. Thereby, the control method according to the present invention can be applied to a heating device provided with a single heater.

In the control method according to the present invention, it is not necessary to measure the heating characteristics of the heater in advance. Therefore, a system having a complicated configuration for executing this control method is not required.

As described above, according to the control method of the present invention, a rapid increase in power consumption at the time of temperature rise of a heating device having a single heater is suppressed without requiring a system having a complicated configuration. The effect which can be done is produced.

In the control method according to the present invention, further,
In the reduction step, it is preferable that the electric power supplied to the heater is set to zero during any period from the time point to the end time point.

According to the above configuration, it is possible to suppress the rapid increase in the power consumption of the heater to the maximum.

In the control method according to the present invention, further,
The time is preferably a reference time for a power supply contract with a power supplier, which is set for a facility where the heating device is installed.

According to the above configuration, it is possible to contribute to preventing the power of the entire facility where the heating device is installed from exceeding the demand contract power.

In order to solve the above problems, a control device according to the present invention provides:
A control device for controlling temperature rise in a heating device provided with a heater,
A determination unit that determines whether or not an integrated value of the power consumption measured from a start time at a predetermined time to any time at the predetermined time has reached a predetermined threshold;
When the determination unit determines that the integrated value has reached the predetermined threshold value, a reduction unit that reduces the power supplied to the heater from any one of the time points to the end point in the predetermined time It is characterized by having.

According to the above configuration, the same operational effects as the control method described above can be obtained.

The control device according to the present invention may be realized by a computer, and in this case, a control program for the control device for realizing the control device by a computer by causing the computer to operate as each unit included in the control device, A computer-readable recording medium on which it is recorded also falls within the scope of the present invention.

The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims, and the embodiments can be obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention. Furthermore, a new technical feature can be formed by combining the technical means disclosed in each embodiment.

The present invention can be widely used as a control method for controlling the power consumption of the heater when the temperature of the heating device is raised.

DESCRIPTION OF SYMBOLS 1 Heating apparatus 2 Temperature control apparatus 3 Electric power control apparatus 11 Heating furnace 12 Heater 21 Temperature sensor 22 Heater control part 31 Wattmeter 32 Timer 33 Heater control part (determination part, reduction part)

Claims

A control method for controlling a temperature rise in a heating device including a heater,
A determination step of determining whether an integrated value of the power consumption amount of the heater measured from a start time at a predetermined time to any time at the predetermined time has reached a predetermined threshold;
In the determination step, when it is determined that the integrated value has reached the predetermined threshold value, a reduction step of reducing the power supplied to the heater from any one of the time points to the end time point in the predetermined time The control method characterized by including these.
2. The control method according to claim 1, wherein in the reduction step, the electric power supplied to the heater is set to zero during any period from the time point to the end time point.
3. The control according to claim 1, wherein the predetermined time is a reference time of a power supply contract with a power supplier, which is set for a facility where the heating device is installed. Method.
A control device for controlling temperature rise in a heating device provided with a heater,
A determination unit that determines whether or not an integrated value of the power consumption measured from a start time at a predetermined time to any time at the predetermined time has reached a predetermined threshold;
When the determination unit determines that the integrated value has reached the predetermined threshold value, a reduction unit that reduces the power supplied to the heater from any one of the time points to the end point in the predetermined time And a control device.
A program for causing a computer to function as the control device according to claim 4, wherein the program causes the computer to function as the control device.
A computer-readable recording medium on which the program according to claim 5 is recorded.