JP2006308154A - Control device of heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a control device capable of automatically extending an operation time in a heater comprising a safety device for automatically extinguishing a fire after a prescribed time from the start of operation. <P>SOLUTION: This control device of a heater comprises the operation switch 2 instructing operation and stop of a burner 1, a temperature detecting means 3 detecting an indoor temperature, a temperature setting means 4 setting the indoor temperature, a human body detecting means 5 detecting presence of a man near the heater, a combustion control means 6 changing combustion of the burner 1 on the basis of signals from a temperature detecting means 3, and a temperature setting means 4 and a human body detecting means 5, and further comprises a timer means counting the operation time of the burner 1 and instructing the extinguishment of the burner 1 after the prescribed time, and a reset means 9 operated before a specific time from the counting of the prescribed time by the timer means 7. The reset means 9 resets a counted time of the timer means 7 when the human body detecting means 5 outputs the detection of human body before the timer means 7 counts the prescribed time, and newly instructs the start of counting by the timer means 7. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a combustion control device for a heater such as a fan heater.

  A heater called a fan heater is provided with an air flow path through which a burner and room air pass in a frame, and the hot air obtained by mixing combustion gas generated in the burner and room air passing through the air flow path. Is heated indoors. And since this heater uses indoor air to return combustion gas into the room, oxygen in the room is consumed.

  Recently, the structure of houses has increased the number of buildings with a high degree of sealing so that heated or cooled air does not escape outside from the viewpoint of energy efficiency. Even if oxygen in the indoor air is consumed by using a heater, It could not be replenished, and the concentration of carbon dioxide in the room was increased without exhausting the combustion gas, and there was a risk of abnormal combustion occurring over a long period of continuous combustion.

  For this reason, the heater called a fan heater is equipped with a safety device that automatically extinguishes after continuous combustion for a predetermined time, and ensures safety when the ventilation operation is forgotten. In addition, if the fire is extinguished after a predetermined time from the start of operation, the fire is automatically extinguished even when there is no risk of oxygen shortage during the combustion, so the lamp will be An alarm is issued by a buzzer or a buzzer, and when a ventilation operation is performed, a reset switch is operated so that continuous combustion can be performed again for a predetermined time (see Patent Document 1).

  In addition, recently equipped with human body detection means to detect the presence of people around the heater, when the heater disappears from the vicinity of the heater during use, the burner combustion amount is changed to small combustion, Some have a structure that reduces fuel consumption when there is no person in the room by stopping combustion of the burner (see Patent Document 2).

JP-A-3-63417 Japanese Patent Laid-Open No. 3-1011

  Although the configuration that automatically extinguishes fires after a predetermined time after the heater is operating is to ensure safety when using the heater, the work of operating the reset switch every predetermined time is troublesome and the ventilation operation If the user forgets to press the reset switch after performing the operation, the heater may stop after a predetermined time even if the room is ventilated, which is a user-friendly function.

  In general, ventilation operations are performed by opening windows and doors, but the operator moves inside the room for this ventilation operation. Therefore, in the present invention, the human body detection function of the human body detection means provided in the heater is used for safety. An object of the present invention is to provide a heater that improves the handleability while securing the properties.

  The present invention solves the above-described problems, and includes an operation switch 2 for instructing operation and stop of the burner 1, a temperature detection means 3 for detecting the indoor temperature, a temperature setting means 4 for setting the indoor temperature, and a heater. Is provided with a human body detecting means 5 for detecting the presence of a person in the vicinity, a temperature detecting means 3, a temperature setting means 4, and a combustion control means 6 for varying the combustion amount of the burner 1 based on signals from the human body detecting means 5. Timer means 7 for counting the operation time of the burner 1 and instructing fire extinguishing of the burner 1 after a predetermined time, and a reset switch 8 for resetting the count time of the timer means 7 and instructing the start of counting of the predetermined operation time again And a reset means 9 that operates when the timer means 7 reaches a predetermined time before the predetermined time is counted, the reset means 9 being a timer means. There is characterized in that an instruction again count start timer means 7 when there is an output of the human body detection by the human body detecting means 5 before counting a predetermined time.

  Further, the storage means 10 for storing the temperature data of the temperature detection means 3 when the timer means 7 reaches a certain time before the predetermined time is counted, and the temperature detection means 3 after the human body detection output by the human body detection means 5 Comparing means 11 for comparing the temperature data with the temperature data of the storage means 10 is provided, and when the comparing means 11 detects a certain temperature difference or more, the resetting means 9 resets the count time of the timer means 7, and the constant temperature When the bottom is detected, the alarm means 12 is activated. When the ventilation operation is performed, the operation time of the heater is automatically extended, and when the ventilation operation is not performed, the user needs to be ventilated. It can make you conscious of sex.

  Further, the combustion control means 6 forcibly changes the combustion amount of the burner 1 to a small combustion or stops the combustion by the human body non-detection signal of the human body detection means 5, and the reset means 9 When the combustion of the burner 1 is stopped by the detection output, the count time of the timer means 7 is reset. When the combustion of the burner 1 is restarted, the timer means 7 is again instructed to start counting. Even when the combustion of the burner 1 is stopped, the operation can be performed for a predetermined time after restarting the operation of the heater.

  In the heater of the present invention, the reset means 9 is activated when the timer means 7 counts a predetermined time before the burner 1 starts to operate, and the human body detecting means before the timer means 7 counts the predetermined time. Since the timer 5 is configured to reset the timer means 7 when the presence of a person is detected, the operation time of the heater is automatically extended when the user moves indoors for ventilation operation. This makes it possible to prevent the heater from being extinguished due to forgetting to push it and to improve handling.

  Further, the detected temperature of the temperature detecting means 3 before a predetermined time that the timer means 7 counts for a predetermined time is compared with the detected temperature of the temperature detecting means 3 after the output of the human body detection by the human body detecting means 5, and this temperature difference is The reset means 9 resets the timer means 7 when the temperature is above a certain temperature, the operating time of the heater can be automatically extended when the user performs a ventilation operation, and the alarm means is activated when the temperature is below a certain temperature As a result, the user is made aware of the need for ventilation, ensuring safety and improving handling.

  Further, when there is no person in the room, the burner 1 is stopped by the human body non-detection signal from the human body detection means 5, but in the present invention, the burner 1 is stopped by the human body non-detection signal from the human body detection means 5 In some cases, the timer means 7 is reset, and when the combustion of the burner 1 is restarted, the timer means 7 is again instructed to start counting. It can be operated for a predetermined time from when the operation is resumed, and the handleability is improved.

  The present invention will be described with reference to the embodiments shown in the drawings. Reference numeral 13 denotes a frame of a heater, 1 is a burner disposed in the frame 13, 14 is a wind tunnel to which combustion air is sent, and 15 is installed in the wind tunnel 14. The bottomed cylindrical pot 15 a is a large number of small-diameter air holes provided in the side wall of the pot 15 so that combustion air can be supplied from the wind tunnel 14, and the main body of the burner 1 is formed by the wind tunnel 14 and the pot 15. Composed. Reference numeral 16 denotes a combustion blower for supplying combustion air to the pot 15, and the combustion air sent to the wind tunnel 14 by the combustion blower 16 is supplied into the pot 15 through the small-diameter air hole 15a.

  17 is a fuel tank for storing fuel to be supplied to the pot 15, 18 is a fuel pump comprising an electromagnetic pump attached to the upper surface of the fuel tank 17, 19 is a fuel pipe provided between the pot 15 and the fuel pump 18, and 20 is fuel. The fuel supply nozzle is composed of a tip of the pipe 19 that extends into the pot 15, and fuel flows from the oil supply nozzle 20 that extends into the pot 15 so as to penetrate the wind tunnel 14 and the side wall of the pot 15. To be supplied.

  Reference numeral 21 denotes a preheating ignition heater attached from the side wall of the pot 15 via the bottom surface of the pot 15, 22 an auxiliary combustion member installed in the pot 15, and 23 a combustion chamber disposed above the pot 15. The fuel supplied into the pot 15 is vaporized at the bottom surface of the pot 15 that has become hot due to the ignition heater 21 and combustion heat, and the combustion air supplied from the small-diameter air hole 15a and the auxiliary combustion member 22 are started while starting the initial combustion. They are mixed by action and burned completely in the combustion chamber 23.

  The heater shown in the figure is an embodiment of a hot air heater called a fan heater, 24 is a ventilation path arranged so as to penetrate the front and rear of the frame 13 and surround the combustion chamber 23, and 25 is a rear of the ventilation path 24. The convection blower 26 is disposed at the front of the blower passage 24, the combustion chamber 23 opens into the blower passage 24, and the combustion gas completely burned in the combustion chamber 23 is sent to the blower passage 24. Then, the indoor air and the combustion gas taken in by the convection blower 25 are mixed in the blower passage 24 and blown out into the room as hot air from the blowout port 26.

  6 is a combustion control means equipped with a microcomputer for controlling the operation of the heater, 2 is an operation switch arranged in the operation part of the frame 13 instructing operation / stop of the heater, and 2a is operated by the operation switch 2 The ignition means 2b is a fire extinguishing means operated by the operation switch 2. The ignition means 2a and the fire extinguishing means 2b are connected to the combustion control means 6, and combustion occurs when the ignition means 2a inputs an operation signal for starting the operation switch 2. When a combustion start signal is sent to the control means 6 and the fire extinguishing means 2b inputs an operation stop signal for the operation switch 2, a fire extinguishing signal is sent to the combustion control means 6, and the combustion control means 6 is based on this signal and the combustion blower 16 Instructing on / off of the fuel pump 18, the ignition heater 21, and the convection blower 25 to control the operation of the heater.

  Reference numeral 3 denotes a temperature detection means constituted by a temperature sensor installed behind the frame 13, and 4 denotes a temperature setting means arranged in the operation part of the frame 13 operated by the user, which is set by the temperature setting means 4. The combustion control means 6 compares the temperature data with the current room temperature data detected by the temperature detection means 3, and if the set temperature is higher, the flow rate of the fuel pump 18 and the rotation speed of the combustion blower 16 are increased. The combustion amount of the burner 1 is increased, and when the room temperature is higher, the combustion amount of the burner 1 is decreased by decreasing the flow rate of the fuel pump 18 and the rotational speed of the combustion blower 16 to set the room temperature. Control to bring it closer to the temperature.

  Reference numeral 5 denotes a human body detecting means composed of a human sensor installed on the front surface of the frame 13, and a human body non-detecting control signal that cannot detect the presence of a person is continuously output from the human body detecting means 5 for a predetermined time or more. Then, the combustion control means 6 changes the flow rate of the fuel pump 18 and the rotational speed of the combustion blower 16 to change the combustion amount of the burner 1 to the minimum combustion. When a human body detection control signal for detecting a human body is output from the human body detection means 5 in this state, the combustion control means 6 returns to normal combustion control based on the data of the temperature detection means 3 and the temperature setting means 4. On the other hand, when the control signal indicating that the human body is not detected from the human body detection means 5 continues for a predetermined time, the combustion control means 6 stops the fuel pump 18 to stop the supply of fuel to the burner 1, and then the combustion blower 16 And the combustion of the burner 1 is stopped.

  7 is a timer means for starting counting upon receiving an operation start signal from the operation switch 2, and the timer means 6 outputs a fire extinguishing signal to the fire extinguishing means 2b when the burner 1 is continuously operated for a predetermined time (for example, 3 hours), thereby controlling combustion. Means 6 stops the burner 1 from burning. 8 is a reset switch for resetting the count time of the timer means 7 and instructing the start of counting of a predetermined operation time, 12 is an alarm means composed of a lamp and a buzzer, and the alarm means 12 is counted by the timer means 7 for a predetermined time. It is activated at a certain time before (for example, 10 minutes before) and informs the user that ventilation operation is required. When the user operates the reset switch 8 after receiving the output of the alarm means 12 and operating the reset switch 8, the count time of the timer means 7 is reset, and the burner 1 can continue to burn for a predetermined time. 1 operation time can be extended. Further, when the user does not perform the ventilation operation after the alarm means 12 starts to operate and the timer means 7 counts for a predetermined time, the combustion of the burner 1 is stopped.

  This configuration is intended to ensure safety when the heater is operated continuously for a long time. When the ventilation operation is performed, the heater can be operated continuously for a predetermined time. It is necessary to operate the reset switch 8 before counting, and even if the ventilation operation is performed, if the reset switch 8 is forgotten to be pressed, the operation will be stopped. It was.

  The present invention uses the human body detecting means 5 provided in the heater to secure safety and improve the handling. Reference numeral 9 denotes a resetting means that operates a predetermined time before the timer means 7 counts for a predetermined time. The reset means 9 inputs the output signal of the human body detecting means 5 and when the control signal for human body detection is output from the human body detecting means 5 before the timer means 7 counts for a predetermined time, the reset means 9 The timer means 7 again starts counting for a predetermined time. On the other hand, when the human body detection control signal is not output from the human body detection means 5 after the reset means 9 is activated, the burner 1 stops burning when the timer means 7 counts for a predetermined time.

  When the operation time of the heater reaches a predetermined time before the predetermined time, the alarm means 12 is activated. At this time, if there is a person in the room, the person moves inside the room to perform the ventilation operation. Since the timer means 7 is automatically reset by outputting the control signal, the user does not need to operate the reset switch 8 after performing the ventilation operation, and the burner 1 is burned by forgetting to press the reset switch 8. It will not stop. Further, when there is no person in the room, or when the human body detection means 5 does not output a human body detection control signal because the human body detection means 5 has fallen asleep in the heated room, the timer 1 counts for a predetermined time. Since combustion was stopped, handling was improved while ensuring safety.

  In another embodiment of the present invention, reference numeral 10 denotes storage means for writing temperature data of the temperature detection means 3, and 11 denotes comparison for comparing the temperature data stored in the storage means 10 with the current temperature data of the temperature detection means 3. When the timer means 7 counts for a predetermined time, the reset means 9 and the alarm means 12 are activated and the temperature data of the temperature detecting means 3 is written into the storage means 10. When the human body detection control signal is output from the human body detection means 5, the reset means 9 does not reset the timer means 7, and the temperature data written in the storage means 10 by the comparison means 11 and the temperature detection means 3. The temperature data detected in step 1 is input and the two temperature data are compared.

  When the user moves inside the room and performs a ventilation operation, the temperature in the room decreases due to the cold air blown into the room when the window or door is opened, and the temperature before and after the human body detection output of the human body detection means 5 Since a difference occurs, when the comparison means 11 detects a certain temperature difference or more, it is determined that the indoor ventilation operation has been performed, and the reset means 9 resets the timer means 7 in response to the output of the comparison means 11, The operation time is counted again. Therefore, when the user moves inside the room and performs the ventilation operation, the timer means 7 is automatically reset and the operation of the burner 1 is extended, and the handleability can be improved.

  On the other hand, when the user has just moved around the room and the ventilation operation is not performed, there is no temperature difference before and after the human body detection output of the human body detection means 5, so the comparison means 11 does not exceed a certain temperature difference. When it is detected, it is determined that the indoor ventilation operation is not performed, the output of the comparison means 11 is received, the alarm means 12 is output again, and the human body detection means 5 outputs the human body detection after the alarm means 12 is activated. If the timer means 7 counts for a predetermined time without being burned, the burning of the burner 1 is stopped. If the human body detection means 5 outputs a human body detection before the timer means 7 counts for the predetermined time, the reset means 9 resets the timer means 7 Thus, the operation of the burner 1 is extended. Therefore, when the user intentionally resets the time of the timer means 7 without performing the ventilation operation, or when the user unconsciously resets the time of the timer means 7, the alarm means 12 By outputting the alarm again, it is possible to make the user aware of the need for ventilation and to ensure safety.

  Further, when the control signal for human body non-detection of the human body detecting means 5 continues for a predetermined time before the timer means 7 counts for a predetermined time from the start of the operation of the burner 1, combustion of the burner 1 is stopped. In the invention, since the reset means 9 resets the timer means 7 even when combustion of the burner 1 is stopped by the human body detection means 5, a person returns to the vicinity of the heater and the combustion of the burner 1 is resumed. Since the timer means 7 counts again for a predetermined time, the heater after the resumption of operation can be operated for a predetermined time.

It is a block diagram which shows the structure of the heater of the Example of this invention. It is sectional drawing of the heater which shows the Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Burner 2 Operation switch 3 Temperature detection means 4 Temperature setting means 5 Human body detection means 6 Combustion control means 7 Timer means 8 Reset switch 9 Reset means 10 Storage means 11 Comparison means 12 Alarm means

Claims (3)

An operation switch 2 for instructing operation and stop of the burner 1, a temperature detection means 3 for detecting the room temperature, a temperature setting means 4 for setting the room temperature, and a human body detection means for detecting the presence of a person near the heater. 5 and a combustion control means 6 for varying the combustion amount of the burner 1 based on the signals of the temperature detection means 3, the temperature setting means 4 and the human body detection means 5,
Timer means 7 for counting the operation time of the burner 1 and instructing fire extinguishing of the burner 1 after a predetermined time, and a reset switch 8 for resetting the count time of the timer means 7 and instructing the start of counting of the predetermined operation time again In a heater comprising:
A reset means 9 is provided which operates when the timer means 7 reaches a predetermined time before the predetermined time is counted, and the reset means 9 outputs the human body detection by the human body detection means 5 before the timer means 7 counts the predetermined time. A control device for a heater, wherein the timer unit 7 is instructed to start counting again when there is an error. A storage means 10 for storing temperature data of the temperature detection means 3 when the timer means 7 counts for a predetermined time, and a temperature of the temperature detection means 3 after the human body detection output by the human body detection means 5 A comparison unit 11 for comparing the data with the temperature data of the storage unit 10;
The reset means (9) resets the count time of the timer means (7) when the comparison means (11) detects a certain temperature difference or more, and the alarm means (12) operates when the comparison means (11) detects a certain temperature difference or less. The heating apparatus control apparatus according to 1. The combustion control means 6 forcibly changes the combustion amount of the burner 1 to a small combustion or stops the combustion by the signal of human body non-detection of the human body detection means 5,
The reset means 9 resets the count time of the timer means 7 when the combustion of the burner 1 is stopped by the human body non-detection output of the human body detection means 5, and when the combustion of the burner 1 is restarted, the timer means 7 counts again. The control device for a heater according to claim 1, wherein the start is instructed.

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