JPH01302024A - Method for controlling pot type combustion heater device - Google Patents

Abstract

PURPOSE:To shorten a period of time ranging from an energization time to a starting of a heating operation by a method wherein a starting of operation can be performed even within a predetermined period of time from the starting of energization if a temperature of a burner becomes lower than a reference temperature. CONSTITUTION:When a temperature switch 1 is turned on and an energization is started, a signal from an operation/fire extinguishing switch 2 is not received and a first display is carried out at a display part 8 to start a fire extinguishing operation. When the temperature switch 1 is turned off, the first display is changed to a second display to terminate the fire extinguishing operation. In addition, a signal from the switch 2 can be received and when the switch 2 is turned on, the display lamp is turned off and at the same time a heating operation can be started. When the energization is started during a turned-off state of the temperature switch 1, a signal from the switch 2 can be received and at the same time the first display is carried out and this is changed to the second display when the predetermined time elapses or the switch 2 is turned on. After this operation, when the switch 2 is turned on, the display lamp at the display part 8 is turned off and at the same time the heating operation can be started.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to control at the start of energization in a pot-type combustion heater.

(Prior art) Conventionally, this type of pot-type combustion heater (hereinafter referred to as a heater) has two types: a closed type and a semi-closed type. Displays a combustor (hereinafter referred to as combustor), a temperature switch that operates by detecting the temperature of the burner of the combustor, an operation/extinguishing switch for starting or stopping heating operation, and a two-digit number. an electromagnetic pump that controls the amount of fuel supplied to the combustor; a combustion blower that sends air for combustion to the combustor; A convection blower for cooling the inside of the heater body, an ignition heater for igniting the fuel in the combustor, and a control unit comprising a CPU and a program for operating the CPU. The control section controls the driving of the electromagnetic pump, the combustion blower, the convection blower, and the ignition heater, and controls the display of the display section.

Further, the temperature switch is disposed around the outer periphery of the burner of the combustor, and a contact signal of the temperature switch is input to the control section. Further, the temperature switch detects the temperature of the burner, and is turned on when the temperature of the burner is equal to or higher than a reference temperature, and turned off when it is lower than the reference temperature. Further, the operation/extinguishing switch is a momentary push button switch disposed on the front panel of the heater, and a contact signal of the operation/extinguishing switch is input to the control section.

Furthermore, the program is configured to be able to control either the hermetic heater or the semi-hermetic heater. The control switching is performed as a semi-hermetic heater when the switching signal A input to the CPU is set to logic "0" depending on the presence or absence of jumper wiring provided in the control section. Further, when the switching signal is set to logic "1", control as a closed type heater is performed.

In this method of controlling a heating machine, when the temperature switch is on at the time of starting electricity supply to the heating machine, the semi-enclosed heating machine drives the combustion blower and the convection blower to perform a fire extinguishing operation. By doing so, the temperature of the burner is lowered to a temperature lower than the reference temperature. Further, in the closed type heater, only the convection blower is driven to perform a fire extinguishing operation, thereby lowering the burner temperature to a temperature lower than the reference temperature. In the closed-type heater, if a power outage occurs during heating operation, air cannot be sent into the combustor, which may lead to suffocation and fire extinguishment. At this time, the fuel in the combustor remains gasified. Therefore, if the combustion blower is driven to send air into the combustor at the time of re-energization, the high-temperature gasified fuel in the combustor will cause explosive combustion. For this reason, in the closed type heater, when the temperature switch is on at the time of starting power supply to the heater, the combustion blower is not driven, and only the convection blower is driven to perform fire extinguishing operation. .

Also, during the fire extinguishing operation at the time of starting energization to the heater, a signal from the operation/extinguishing switch is not accepted. In other words, if the power supply is cut off due to a power outage or the like during heating operation and then turned on again, if heating operation is started and ignited again when the temperature of the burner is above the reference temperature, the remaining gas will remain in the combustor. This is because the fuel that has been stored or the fuel that has been discharged from the electromagnetic pump may suddenly gasify and cause explosive combustion.

Further, both the semi-hermetic heater and the hermetic heater,
When the temperature switch is off at the time of starting power supply to the heater, the temperature of the burner may be a temperature just before the temperature switch is turned on. For this reason, in consideration of safety, the heating operation is enabled after a predetermined period of time has elapsed since the power was turned on, or when the operation/extinguishing switch is pressed twice in succession. When the operation/extinguishing switch is pressed while the heating operation is enabled, the heating operation is started.

Next, the conventional control method at the start of energization will be explained based on the control flowchart shown in FIG.

When energization of the heater is started, the CP of the control section
U stops driving the electromagnetic pump and stops supplying fuel to the combustor (Sl). Next, the power to the ignition heater is cut off (S2), and it is determined whether the temperature switch is on (S3).

As a result of this determination, if the temperature switch is off, the CPU
Write “0” to internal register B (S4)
, display the number "77" on the display section indicating that the current has just started (S5), and stop driving the convection blower and the combustion blower (S6), S12.
Move on to processing.

As a result of the determination in S3, if the temperature switch is on, "1" is written in the register B (S7), and the number "77" is displayed on the display section, indicating that the current has just started.
(S8), the switching signal A is logic "1".
” (S9). As a result of this determination,
When the content of the register B is "1" and the switching signal A is logic "1", the combustion blower is stopped and the convection blower is driven. "1" and when the switching signal A is logic "0", the combustion blower and convection blower are driven (S11).In other words, in the case of a closed type heater, the air flow into the combustor is The fire is extinguished by cutting off the inflow of air.Next, the CPU sets a timer provided in the CPU to start timing (512), and determines whether the timer's count time is 10 minutes (512). 513)
. The time of 10 minutes is set in the program as a sufficient time for the temperature of the burner to decrease when the temperature of the burner is high. As a result of the determination in S13, if the timer count time does not reach 10 minutes, the process in S13 is continued, and if the timer count time reaches 10 minutes, the contents of the register B are "1". It is determined whether or not there is one (S14). As a result of this judgment, if the contents of the register B are not “1”, S
1B, and if the content of register B is "1", it is determined whether or not the temperature switch is off (
S15). As a result of this determination, if the temperature switch is not off, the process of S15 is continued, and if the temperature switch is off, the process moves to step 816.

As a result of the judgment at SL4, the content of the register B is “1”.
”, or if the temperature switch is off as a result of the determination in S15, the CPU displays the number “88” on the display section, which means that there has been a power outage (51
B). Next, the drive of the convection blower and the combustion blower is stopped (517), and it is determined whether the operation/extinguishing switch is on (318). As a result of this determination, if the operation/extinguishing switch is not on, the process of 818 is continued, and if the operation/extinguishing switch is on, the display on the display section is turned off (S19). After this, it becomes possible to start heating operation.

Further, the display of "88" also means that a signal from the operation/extinguishing switch can be accepted.

(Problem to be Solved by the Invention) However, in the conventional heating machine control method, if energization is started when the temperature of the burner is higher than the reference temperature, for example, there is a power outage during heating operation and the energization is re-energized. In this case, the burner temperature may stabilize at a temperature lower than the reference temperature before 10 minutes have elapsed. Despite this, the heating operation cannot be started again because the fire cannot be re-ignited until the 10-minute fire extinguishing operation is completed.

Furthermore, if power is started when the temperature of the burner is lower than the standard temperature, for example, if there is a power outage and the power is re-energized while heating operation is not being performed, heating operation may not be started until 10 minutes have elapsed. The problem is that it cannot be done.

In view of the above-mentioned problems, an object of the present invention is to provide a method for providing sufficient time for the temperature of the burner to decrease after the start of electricity supply to the heater, even before 10 minutes have elapsed in the conventional example.
It is an object of the present invention to provide a control method for a pot-type combustion heater that can start heating operation from that point when the temperature of the burner becomes lower than the reference temperature.

(Means for Solving the Problems) In order to achieve the above object, the present invention turns on when the temperature of the burner of a pot-type combustor is equal to or higher than the predetermined temperature, and the temperature of the burner is lower than the predetermined temperature. A temperature switch that turns off when the temperature is low; a run/extinguish switch for starting or stopping heating operation; a display section capable of displaying at least two types; a signal from the temperature switch and a signal from the run/extinguish switch. and a control unit that controls heating operation and extinguishing operation as well as controlling the display of the display unit. , when the temperature switch is on, it does not accept the signal from the operation/extinguishing switch, displays a predetermined first display on the display and starts the extinguishing operation, and when the temperature switch is turned off; , changing the display on the display unit to a predetermined second display and stopping the fire extinguishing operation;
Furthermore, it is possible to accept a signal from the operation/extinguishing switch, and when the operation/extinguishing switch is turned on, the display on the display section is turned off and the heating operation can be started, and when the energization is started, When the temperature switch is off, the signal from the operation/extinguishing switch can be accepted and the first display is displayed on the display section, and after the predetermined time has elapsed or when the operation/extinguishing switch is turned on. When the operation/extinguishing switch is turned on after changing to the second display, the display on the display unit is turned off and the heating is turned off. It is now possible to start driving.

(Function) According to the present invention, when energization is started while the temperature switch is on, the signal from the operation/extinguishing switch is not accepted, and a predetermined first display is displayed on the display section. When the temperature switch is turned off, the display on the display section is changed to a predetermined second display and the fire extinguishing operation is stopped, and when the temperature switch is turned off, the fire extinguishing operation is stopped. When the signal is made acceptable and the run/extinguish switch is turned on, the display on the display is turned off and heating operation can be started. Further, when electricity is started while the temperature switch is off, a signal from the operation/extinguishing switch is enabled to be accepted, and the first display is displayed on the display section, and after a predetermined period of time has elapsed. or said driving/
When the fire extinguishing switch is turned on, the display on the display section is changed to the second display, and when the operation/extinguishing switch is turned on, the display on the display section is turned off and the heating is turned off. It is possible to start driving.

(Example) FIG. 1 is a block diagram showing a control system of a pot-type combustion heater (hereinafter referred to as a heater) according to the present invention. In the figure, 1 is a temperature switch, which is installed around the outer circumference of a pot-type combustor (hereinafter referred to as combustor) and detects the temperature of the burner of the combustor. It is turned on when the burner temperature is lower than the reference temperature. Reference numeral 2 denotes a running/extinguishing switch, which is a momentary push button switch provided on the front panel of the heater, and is turned on when the running/extinguishing switch 2 is pressed. 4 is an electromagnetic pump that controls the amount of fuel supplied to the combustor. 5 is an ignition heater,
It is disposed inside the combustor and ignites the fuel within the combustor when energized. A combustion blower 6 is used to send combustion air to the combustor. A convection blower 7 is used to send hot air from the heater during heating operation and to cool the inside of the heater main body during fire extinguishing operation. Reference numeral 8 denotes a display unit, which includes a 7-segment LED provided on the front panel of the heater, and is used to display the status of the heater. Reference numeral 9 denotes a control unit, which includes a CPU and a program for operating the CPU, and which controls the temperature switch 1.
, inputs the contact signal of the operation/extinguishing switch 2, controls the driving of the electromagnetic pump 4, energizing the ignition heater 5, driving the combustion blower 6, driving the convection blower 7, etc., and displays the display on the display section 8. Take control.

Furthermore, the program is configured to be able to control both closed-type heaters and semi-closed-type heaters. The control is switched when the switching signal A input to the CPU is set to logic "0" depending on the presence or absence of a jumper tl [(not shown) provided in the control unit 9. will be held. Further, when the switching signal is set to logic "1", the closed type heater is controlled.

Next, an embodiment of the control method of the present invention will be described based on the flowchart shown in FIG.

When energization of the heater is started, C of the control section 9
The PU stops driving the electromagnetic pump 4 and stops supplying fuel to the combustor (SPI). Next, the CPU cuts off the power to the ignition heater 5 (SF3) and determines whether the temperature switch 1 is on (SF3). As a result of this judgment,
When the temperature switch 1 is on, the number "77" is displayed on the display section 8, which means that the current has just started.
P4), determining whether the temperature switch 1 is on and the switching signal A is logic "1" (S
F3). As a result of this determination, when the temperature switch 1 is on and the switching signal A is logic "1", the combustion blower 6 is stopped and the convection blower 7 is started (5P8), and the temperature When the switch 1 is on and the switching signal A is logic "0", the combustion blower 6 and the convection blower 7 are driven (SF3). That is, in the case of a closed-type heater, the fire is extinguished by stopping the combustion blower 6 and cutting off the flow of air into the combustor.

Next, the CPU determines whether the temperature switch 1 is off (SF3). As a result of this determination, if the temperature switch l is not off, continue processing SF3,
When the temperature switch l is off, the process moves to step 5P14.

As a result of the determination in SP3, when the temperature switch 1 is off, the CPU displays the number "77" on the display section 8, which means that energization has just started (5P9), and the combustion blower 6 and the convection blower Stop the drive of 7 (S P
10). Next, the CPU sets a timer provided in the CPU to start timing (5PII), and determines whether the timer's count time is 10 minutes (S P
12). The time of 10 minutes is set in the program as a sufficient time for the temperature of the burner to decrease when the temperature of the burner is high. Said P.S.
As a result of the judgment in step 12, when the timer count time reaches 10 minutes, the process moves to step 5P14, and when the timer count time does not reach 10 minutes, it is determined whether or not the operation/extinguishing switch 2 is on. Judgment (SP 13)
. As a result of this determination, if the operation/extinguishing switch 2 is not on, the process moves to 5P12, and when the operation/extinguishing switch 2 is on, the process moves to 5P14. ' As a result of the judgment in SP8, when the temperature switch 1 is off, or as a result of the judgment in 5P12, when the timer count time reaches 10 minutes, or as a result of the judgment in 5P13, the operation/extinguishing switch 2 is turned off. When on, the CPU displays the number "8" on the display section 8, which means that there has been a power outage and that the signal from the run/extinguish switch 2 can be accepted.
8" (SP14). Next, stop the combustion blower 6 and convection blower 7. 5P15)
, it is determined whether the operation/extinguishing switch 2 is on (S P 1B). As a result of this determination, when the operation/extinguishing switch 2 is not on, the processing of 5P1B is continued, and when the operation/extinguishing switch 2 is on, the display on the display section 8 is turned off (SPI7). After this, it becomes possible to ignite again and start heating operation.

(Effects of the Invention) As explained above, according to the present invention, the temperature switch is turned on when the temperature of the burner of the pot-type combustor is above a predetermined temperature, and is turned off when the temperature of the burner is lower than the predetermined temperature. , an operation/extinguishing switch for starting or stopping heating operation, a display section capable of displaying at least two types of display, a signal from the temperature switch and a signal from the operation/extinguishing switch, In the method for controlling a pot-type combustion heater, the temperature switch is turned on when power is started to be applied to the pot-type combustion heater. When the signal from the operation/extinguishing switch is not accepted, a predetermined first display is displayed on the display section, and the extinguishing operation is started, and when the temperature switch is turned off, the display section displays a predetermined first display on the display section. to a predetermined second display and stop the fire extinguishing operation, further enable reception of a signal from the operation/extinguishing switch, and change the display on the display when the operation/extinguishing switch is turned on. When the light is turned off, it is possible to start the heating operation, and when the temperature switch is off when the power supply is started, it is possible to accept a signal from the operation/extinguishing switch, and the first display is displayed on the display unit. and after a predetermined time has elapsed or when the operation/extinguishing switch is turned on, the display on the display section is changed to the second display, and after changing to the second display, the operation/extinguishing switch is turned on. When the temperature of the burner reaches the predetermined level, the temperature of the burner is set to the predetermined level after the power supply to the pot-type combustion heater is started. When the temperature drops below the temperature, it is possible to start heating operation from that point, so compared to the control method of conventional pot-type combustion heaters, heating operation starts only after electricity is turned on. This has the advantage that it takes less time to become possible.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a control system of a pot-type combustion heater according to the present invention, FIG. 2 is a flow chart showing a conventional control method, and FIG. 3 is a flow chart showing an embodiment of the present invention. 1... Temperature switch, 2... Operation/extinguishing switch,
4...Electromagnetic pump, 5...Ignition heater, 6...
Combustion blower, 7... Convection blower, 8... Display section, 9... Control section. Patent applicant Sanden Co., Ltd. agent Patent attorney Yoshi 1) Takashi Sei

Claims (1)

[Claims] A temperature switch that is turned on when the temperature of a burner of a pot-type combustor is above a predetermined temperature and turned off when the temperature of the burner is lower than the predetermined temperature, and for starting or stopping heating operation. The heating operation and extinguishing operation are controlled by inputting the operation/extinguishing switch, a display section capable of displaying at least two types of displays, a signal from the temperature switch and a signal from the operation/extinguishing switch, and controlling the heating operation and extinguishing operation. and a control section that controls the display of a display section, wherein when the temperature switch is on when power is started to the pot-type combustion heater, a signal from the operation/extinguishing switch is sent. and displaying a predetermined first display on the display unit and starting the fire extinguishing operation, and when the temperature switch is turned off, changing the display on the display unit to a predetermined second display, and The fire extinguishing operation is stopped, and a signal from the operation/extinguishing switch is enabled to be accepted, and when the operation/extinguishing switch is turned on, the display on the display unit is turned off, and the heating operation is started. When the temperature switch is off at the start of the energization, the signal from the operation/extinguishing switch is enabled and the first display is displayed on the display section, and after a predetermined time has elapsed or the operation/extinguishing switch is turned off. When the fire extinguishing switch is turned on, the display on the display section is changed to the second display, and after changing to the second display, when the operation/extinguishing switch is turned on, the display on the display section is changed. 1. A method for controlling a pot-type combustion heater, characterized in that the heating operation is started at the same time as turning off the light.