JP2006183890A - Hot air heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hot air heater reducing fuel consumption and realizing comfortable heating by detecting the presence of a human body to adjust the amount of combustion. <P>SOLUTION: The hot air heater is provided with a combustion control means 12 starting and stopping the combustion of a burner 2 based on a signal of an operation switch 11 and adjusting the combustion amount of the burner 2 under combustion; a human body detecting means 13 for detecting the presence of a person near the hot air heater; a timer means 14 equipped with two long and short clocking functions of counting during non-detection of a human body; and a combustion regulating means 15 outputting a combustion control signal to the combustion control means 12. The combustion regulating means 15 changes the combustion amount of the burner 2 into micro combustion by the count-up output of a short predetermined time T1 of the timer means 14 during non-detection of the human body, and stops combustion by count-up output of a long predetermined time T2 to reduce fuel consumption. When the human body is detected during micro combustion, combustion control by the combustion control means 12 is resumed directly or via the maximum amount of combustion of the burner 2. A user's uncomfortable feeling caused by a drop of room temperature can thereby be reduced. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a combustion control device for a hot air heater.

  Conventionally, in a hot air heater of a type that exhausts combustion exhaust into a room, a burner is provided in the frame, a pump that supplies fuel to the burner, and a combustion blower that sends combustion air are provided, and the fuel supplied from the pump Then, the combustion air from the combustion blower is mixed, vaporized, and burned in the burner to generate the amount of heat necessary for heating.

  Air passing through the air flow path by passing through the air flow path passing through the front and rear of the frame body is provided with a convection blower on the inlet side and an air outlet on the outlet side, and a combustion chamber provided on the upper part of the burner is attached to the air flow path. And exhaust gas sent from the burner into the combustion chamber are mixed and blown out from the blowout outlet to the front surface of the frame body by a convection blower.

  The frame is provided with combustion control means for controlling the pump and the blower for combustion to start / stop the combustion of the burner, and change the amount of combustion, and the operation switch provided on the operation panel on the frame is turned on. The burner combustion start and stop are controlled based on the / off signal.

  The frame body is provided with an indoor temperature detecting means for detecting an indoor temperature, and the operation panel is provided with a temperature setting means for allowing a user to set a desired indoor temperature. The combustion control means is provided with an indoor temperature detecting means. Based on the detected numerical value of the room temperature and the numerical value of the set temperature determined by the temperature setting means, control is performed so as to change the combustion amount of the burner so that the indoor temperature approaches the set temperature.

In recent years, as shown in Patent Document 1, a human body detection unit that detects the presence or absence of a human body around a heater is provided in a frame, and when the human body detection unit no longer detects the presence of a person, the temperature setting unit The burner burn amount is calculated by forcibly lowering the set temperature value by the user's preset value and comparing the reduced set temperature with the room temperature using the combustion control means. There is a known structure in which the fuel consumption of the heater is reduced while there are no people in the room.
JP 2003-90624 A Japanese Patent Laid-Open No. 3-1011

  As described in Patent Document 1, the method of forcibly lowering the set temperature when the human body is not detected to change the burner combustion amount is, for example, when the person disappears immediately after the start of the burner operation. In some cases, the set temperature lowered due to non-detection is higher than the current room temperature, and the combustion control means compares the set temperature lowered to bring the low current room temperature closer to the changed set temperature and the current room temperature, Since the maximum combustion is instructed as the burner combustion amount, the combustion amount does not change before and after the set temperature decreases, and the fuel consumption reduction effect due to the burner combustion amount reduction cannot be obtained. .

  In addition, the usage state of the room varies depending on the user, and there are people who frequently go in and out of the room, and there are people who do not return as they are once they leave the room, and usage varies depending on the user's habit. For this reason, when the time from when the human body detecting means is not detected until the combustion amount decreases is constant, the fuel consumption is reduced in the manner desired by the user in all of the above situations. Have difficulty.

  Further, when the human body is detected in a state where the combustion amount is decreased due to the non-detection of the human body, it is expected that the room temperature is lowered due to the decrease in the combustion amount. Therefore, in order not to give the user uncomfortable feeling due to the decrease in the room temperature, it is necessary to increase the decreased room temperature as soon as possible.

  In addition, even when a person is present in the room for some reason, even when the human body detecting unit cannot detect the human body for a certain period of time, the combustion amount is reduced and the room temperature is lowered. In order to restore the lowered room temperature, it is necessary to cause the human body detection means to detect the presence of a human body or to artificially stop the function of the human body detection means to restore the combustion amount. However, when the user is in the blind spot of the human body detection means and hardly moves, the human body detection means cannot detect the human body, so the user must move frequently to make the human body detection means detect the presence of the human body. This situation can cause discomfort to the user.

  The present invention solves the above-mentioned problems. A burner 2 in the frame 1, a pump 3 for supplying fuel to the burner 2, and a combustion blower 4 for sending combustion air to the burner 2 are provided. The blast passage 5 passing through the front and rear of the body 1 is provided with a convection blower 6 on the inlet side and an outlet 7 on the outlet side, and a combustion chamber 8 provided on the upper part of the burner 2 opens into the blast passage 5. Based on the signal from the operation switch 11, the indoor temperature detecting means 9 for detecting the room temperature, the temperature setting means 10 for setting the room temperature, and the pump 3 Combustion control means 12 that controls the combustion blower 4 to start and stop combustion of the burner 2, and the combustion control means 12 uses signals from the indoor temperature detection means 9 and the temperature setting means 10. Temperature that varies the amount of combustion of the burner 2 during combustion In the heater, the hot air heater is a human body detecting means 13 for detecting the presence of a nearby person, a timer means 14 for measuring a predetermined time, and a combustion restricting means 15 for outputting a control signal to the combustion control means 12. The timer means 14 is provided with two timekeeping functions for counting when the human body is not detected, and the combustion regulating means 15 is combusted by a control signal from the combustion control means 12 with an output that is counted up for a short predetermined time T1. The amount is forcibly changed to minute combustion, and the combustion regulating means 15 stops the combustion by the control signal of the combustion control means 12 at the output when the long predetermined time T2 is counted up, and the combustion restriction means 15 continues the minute combustion. When the human body detecting means 13 detects a human body, the combustion control means 12 determines the combustion amount of the burner 2 based on signals from the indoor temperature detecting means 9 and the temperature setting means 10. In baked amount, characterized by returning through the maximum combustion amount of directly or burner 2.

  The timer means 14 includes a count-up time varying means 16 and a minute combustion timing means 17 for measuring the duration of minute combustion, and the minute combustion is canceled by a signal detected by the human body detecting means 13. When the time of the minute combustion timing means 17 at this time is equal to or less than a preset time, the variable means 16 increases the short predetermined time T1 for counting that the timer means 14 is not detecting the human body at the start of combustion. Therefore, even if the human body detecting means 13 does not detect the presence of a person when there is a person in the room, the comfortable heating can be maintained thereafter.

  When the human body non-detection time by the human body detection means 13 continues for the first predetermined time T1, the heating device is configured to change the combustion amount to a predetermined feasible minute combustion. Because of this, the amount of combustion does not decrease immediately, and even if a person repeatedly goes in and out in a short time, the amount of combustion is not changed frequently. Further, when the human body is not detected for a predetermined time T1, it can be determined that the person is absent. At this time, the combustion amount is reduced to the minute combustion, and further, such a minute combustion is longer than the predetermined time. If the time T2 is continued, the combustion is stopped from this minute combustion state, so that unnecessary heating is eliminated and fuel consumption is reduced, thereby realizing energy saving.

  Further, when the human body detecting means 13 detects the human body while the minute combustion has continued for a short predetermined time T1 of the timer means 14 due to the non-detection state of the human body, the minute combustion by the combustion regulating means 15 is released immediately and the room temperature The combustion amount at this time is returned to the combustion amount. At this time, the combustion amount becomes the maximum combustion amount of the burner 2 because the room temperature has dropped, and then the previous combustion amount is restored. When returning, of course, when a person located in the blind spot of the human body detection means 13 comes out, the amount of combustion that has continued the minute combustion changes to strong combustion, and immediately raises the room temperature to provide comfortable heating. It has become possible to reduce the user's discomfort due to a decrease in room temperature.

  Further, when the human body detecting means 13 does not detect the human body even though there is a person in the room as described above, the person notices that he / she is in the blind spot of the human body detecting means 13 for the first time when the combustion amount decreases. Although the human body detecting means 13 detects the presence of the person to restore the combustion amount, in the present invention, the timer means 14 includes a variable means 16 for changing the count-up time of the time measuring function, and a short predetermined time T1. Is provided with a minute combustion timing means 17 for measuring the time during which the minute combustion continues after counting up, and when the time of the minute combustion timing means 17 is equal to or less than a preset time, the variable means 16 increases the short predetermined time T1. It is corrected to become. For this reason, when the time of the minute combustion timing means 17 returns when the time is short, it is determined that there is a person in the room being heated, and the frequency at which the combustion amount decreases is automatically reduced from the next time, and the human body detection means 13 can increase the chances of detecting a human body, and can reduce the user's discomfort due to frequent room temperature drop.

  This configuration will be described with reference to the drawings showing an embodiment. 1 is a frame of a warm air heater, 2 is a burner disposed in the frame 1, 18 is a wind tunnel to which combustion air is sent, and 19 is in the wind tunnel 18. The bottomed cylindrical pot 19a is provided with a plurality of small-diameter air holes provided in the side wall of the pot 19 so that combustion air can be supplied from the wind tunnel 18. It is constituted by a pot 19. 4 is a combustion blower for supplying combustion air to the pot 19, and the combustion air fed by the combustion blower 4 is sent to the wind tunnel 18 and is appropriately selected depending on the position and size of the small diameter air hole 19a. It is controlled and supplied into the pot 19.

  20 is an oil tank for storing fuel to be supplied to the pot 19, 3 is a pump constituted by an electromagnetic pump attached to the upper surface of the oil tank 20, 21 is a fuel pipe provided between the pot 19 and the pump 3, and 22 is a fuel pipe. 21 is an oil feed nozzle constituted by a tip extended into the pot 19, and fuel is supplied from the oil feed nozzle 22 extended into the pot 19 so as to penetrate the wind tunnel 18 and the side wall of the pot 19. To be supplied.

  23 is a preheating ignition heater attached from the side wall of the pot 19 through a space from the bottom of the pot 19, 24 is an auxiliary combustion member installed in the pot 19, and 8 is a combustion chamber arranged above the pot 3. The fuel supplied into the pot 19 is vaporized on the bottom surface of the pot 19 that is heated by the ignition heater 23 and combustion heat, and the combustion air and auxiliary member supplied from the small diameter air hole 19a while starting the initial combustion. 24 is mixed and burned completely in the combustion chamber 8.

  5 is a ventilation path arranged so as to pass through the frame 1 in the front-rear direction so as to surround the combustion chamber 8, 6 is a convection blower installed behind the ventilation path 5, and 7 is installed in front of the ventilation path 5. The combustion chamber 8 opens into the blower passage 5, and the combustion gas completely burned in the combustion chamber 8 is sent to the blower passage 5 and the room air and the combustion gas taken in by the convection blower 6. Are mixed in the blower path 5 and discharged as warm air from the blower outlet 7.

  Further, 12 is a combustion control means configured by a computer system installed in the frame 1 and operated by a CPU, ROM, RAM, I / O device, etc., 25 is an operation panel installed on the surface of the frame 1, 11 is an operation switch provided on the operation panel 25, 26 is a lead wire connecting the operation panel 25 and the combustion control means 12, and an ON / OFF signal of the operation switch 11 is sent to the combustion control means 12 through the lead wire 26. The combustion control means 12 instructs on / off of the pump 3, the combustion blower 4, the ignition heater 23, and the convection blower 6 based on the signal of the operation switch 11 to control the operation of the hot air heater. .

  Further, 9 is a room temperature detecting means constituted by a temperature sensor installed at the rear of the frame 1, and 10 is a temperature setting means for storing a temperature desired by the user by operating with a button provided on the operation panel 25. Yes, the temperature value stored in the temperature setting means 10 and the temperature value of the current room temperature provided by the indoor temperature detection means 9 are compared by the combustion control means 12, and if the set temperature is higher, the pump 3 By increasing the flow rate and the combustion fan 4 by increasing the rotational speed of the combustion blower 4, and by reducing the flow rate of the pump 3 and the rotational speed of the combustion blower 4 when the room temperature is higher By reducing the amount of combustion in the burner 2, the control is performed so that the numerical value of the room temperature approaches the numerical value of the set temperature.

  Reference numeral 13 denotes a human body detection means composed of a human sensor installed on the front surface of the frame 1, and reference numeral 15 denotes a human body detection / non-detection control signal from the human body detection means 13 and receives a combustion control signal from the human body detection means 12. Combustion restricting means for sending out a combustion stop signal, and 14 is a timer means for starting counting when the human body detecting means 13 detects a state where no human body is detected, and for stopping the counting when the human body detecting state is detected. The means 15 instructs the timer means 14 to start counting upon receiving a human body non-detection control signal from which the human presence cannot be detected from the human body detecting means 13, and controls human body detection by detecting the human body from the human body detecting means 13. When the signal is received, the timer means 14 is instructed to stop counting.

  On the other hand, when the timer means 14 that has started counting finishes counting, an output signal is sent to the combustion restriction means 15, and the combustion restriction means 15 receives this signal and sends an output signal for reducing the combustion amount of the burner 2 to the combustion control means 12. Therefore, the combustion control means 12 changes the fuel and air flow rates of the pump 3 and the combustion blower 4 to change the combustion amount of the burner 2 to smaller combustion than the normal combustion amount.

  The timer means 14 of the present invention has two time measuring functions of a short predetermined time T1 and a long predetermined time T2 for counting when the human body is not detected. The embodiment shown in FIG. 2 relates to the configuration of the timer means 14, wherein 27 is a clock counter which is the basis of the timer function, 14a is a short time timer for measuring the short predetermined time T1, and 14b is a long predetermined time. The short-time timer 14a and the long-time timer 14b count time by the signal of the clock counter 27, and the start / stop signal from the combustion regulating means 15 is a short-time timer 14a. Is output to the timer 14b for a long time, and the time counting is started and stopped.

  When the combustion restricting means 15 instructs the timer means 14 to start counting in response to an output signal from the human body detecting means 13, the timer means 14 of the embodiment has a time measuring function of a short predetermined time T1 and a long predetermined time T2. Operate. When the short time timer 14a of the timer means 14 finishes counting the short predetermined time T1, the timer means 14 outputs a human body non-detection signal to the combustion restriction means 15 and receives the human body non-detection signal. 15 outputs a combustion regulation signal to the combustion control means 12. The combustion control means 12 to which this combustion restriction signal is inputted interrupts the combustion control based on the comparison between the set temperature and the current room temperature and forcibly changes the combustion amount of the burner 2 to a minute combustion amount. The amount of air and the fuel flow rate of the pump 3 are reduced. [See FIG. 3 (a)]. For this reason, if the combustion amount of the burner 2 when the human body detecting means 13 no longer detects the presence of a person is in a combustion state larger than the minute combustion, the combustion amount is reduced to the minute combustion amount. Fuel consumption can be effectively reduced.

  The timer means 14 operates even after the short predetermined time T1 has been counted, and when the long time timer 14b finishes counting the long predetermined time T2, the timer means 14 is the combustion regulating means. The combustion control means 15 that outputs the second human body non-detection signal to 15 outputs the combustion stop signal to the combustion control means 12. For this reason, the combustion control means 12 receives the combustion stop signal from the combustion restriction means 15 in the same manner as when the operation stop signal is output from the operation switch 11, stops the operation of the pump 3, and sends it to the burner 2. The combustion of the burner 2 is stopped by stopping the fuel supply and then stopping the operation of the combustion blower 4. [See FIG. 3 (a)]. For this reason, when the user leaves the room for a long period of time when the combustion control means 12 makes the combustion amount of the burner 2 minute combustion based on the human body non-detection signal by the short-time timer 14a of the timer means 14, The timer means 14 outputs a second human body non-detection signal when the long time timer 14b times a long predetermined time T2, and the combustion control means 12 stops the combustion of the burner 2 based on this output signal. When there were no people in the room, the fuel consumption could be reduced more effectively than continuing the micro combustion.

  Further, even if the combustion regulating means 15 receives an output signal indicating that the human body detecting means 13 has not detected the human body and the combustion regulating means 15 instructs the timer means 14 to operate the time measuring function, the timer means 14 has a short predetermined time T1. During counting, the combustion control means 12 compares the temperature value stored in the temperature setting means 10 with the temperature value of the current room temperature, and indicates the optimum fuel flow rate and supply air amount in the pump 3 and the combustion blower 4. Thus, the burner 2 continues normal operation. When the human body detecting means 13 detects the presence of a person in this state, the combustion restricting means 15 receives the human body detection output signal of the human body detecting means 13 and stops the time counting function of the timer means 14. The burner 2 continued normal operation even when there was no person's absence in the inside room, and the amount of combustion of the burner 2 did not change in response to a person's entry and exit for a short time. Further, when the human body detecting means 13 detects the absence of the person again from this restored state, the timer means 14 operates the time measuring function, and the combustion amount of the burner 2 shifts to the minute combustion in a short predetermined time T1, and further When the long predetermined time T2 elapses, the combustion of the burner 2 is stopped. [Refer FIG.3 (b)].

  In addition, the combustion control means 12 changes the combustion amount of the burner 2 to minute combustion according to the combustion restriction signal of the combustion restriction means 15, and the timer means 14 counts a long predetermined time T2 and is away from the heater. Is returned and the human body detecting means 13 detects the presence of a person, the combustion regulating means 15 receives the human body detection output signal of the human body detecting means 13 and stops the timer function of the timer means 14 and also the combustion control means 12 Stop the combustion regulation signal that was output to. For this reason, the combustion control means 12 that has changed the combustion amount of the burner 2 to minute combustion compares the temperature value stored in the temperature setting means 10 with the temperature value of the current room temperature, and the optimum pump 3 and combustion The original combustion control operation for instructing the fuel flow rate and the supply air amount in the blower 4 is resumed.

  At this time, since the room temperature during heating is subject to minute combustion of the burner 2 and the room temperature is lower than the set temperature, the combustion of the burner 2 often shifts to maximum combustion, and as the room temperature rises, Return to combustion when presence is detected. Further, when the burner 2 does not perform maximum combustion when the combustion control unit 12 shifts to normal combustion control based on the temperature value stored in the temperature setting unit 10 and the temperature value of the current room temperature, the burner 2 is forcibly used. After the maximum combustion is performed, the combustion control by the combustion control means 12 may be shifted to the combustion when the presence of a person is detected, and the combustion amount of the burner 2 is compared between the set temperature and the room temperature. The original combustion amount can be returned to. [Refer FIG.3 (c)]. For this reason, even when the user is in the blind spot of the human body detection means 13, even if there is a person in the room and the combustion amount decreases and the room temperature decreases, the user moves and the presence of the person If the human body detecting means 13 detects the burner 2, the burner 2 enters a large combustion state and raises the room temperature, thereby reducing the user's discomfort due to a decrease in the room temperature.

  In the embodiment of the configuration of the timer means 14 shown in FIG. 2, reference numeral 16 denotes the count-up times of the short-time timer 14a and the long-time timer 14b of the timer means 14 based on an external input instruction such as an input value from the operation panel 25. A variable means for changing one or both of them, a short predetermined time T1 from when the human body detecting means 13 no longer detects the presence of a person until switching to the minute combustion, and until the combustion is stopped by continuing this minute combustion. The long predetermined time T2 can vary depending on the situation of the room in which the heating device is placed.

  That is, even if a state in which the human body detecting means 13 installed in the frame 1 cannot always detect the human body by furniture or the like occurs due to the state of the room in which the hot air heater is placed, the configuration of the present invention. If there is, the person who is warming may move in the room, so the human body detecting means 13 often detects the presence of the person and the burner 2 can continue to burn. However, depending on the behavior of the person who warms up, the burner 2 may stop operating even if there is a short predetermined time T1 or a long predetermined time T2. By directly operating the variable means 16, it becomes possible to adjust the short predetermined time T1 and the long predetermined time T2 according to the user's behavior pattern, thereby reducing the user's discomfort due to the stop of the heating operation. We were able to.

  In the embodiment shown in FIG. 2, 17 is a minute combustion timing means for counting after the short-time timer 14a counts up and counting the time until the time count of the long-time timer 14b is stopped. The time counted by the minute combustion timing means 17 is the time during which minute combustion is continued by the burner 2. Reference numeral 28 denotes storage means for storing a time corresponding to the length of time measured by the micro combustion timing means 17, and reference numeral 29 denotes a comparison for comparing the time stored in the storage means 28 with the time measured by the micro combustion timing means 17. The output of the comparison circuit 29 is the operation input of the variable means 16 in addition to the input from the operation panel 25.

  Instead of the user directly operating the variable means 16 as in the previous embodiment, this embodiment proposes an operation mode in which the variable means 16 automatically operates, and the combustion control When the means 12 changes the combustion amount of the burner 2 to minute combustion by the combustion restriction signal of the combustion restriction means 15 and the timer means 14 counts the long predetermined time T2, the human body detection means 13 detects that the human body is not detected. The variable means 16 is activated when the output signal is canceled and the output signal of human body detection in which a human body exists is output and the burner returns to the large combustion state.

  That is, the minute combustion timing means 17 has a function to start counting after the short-time timer 14a counts up, and to measure the minute combustion continuation time T3 until the time counting of the long-time timer 14b stops. [Refer FIG.3 (c)]. Then, the comparison circuit 29 determines whether or not the measured minute combustion continuation time T3 is equal to or less than a predetermined time stored in the storage means 28. If the time is less than the predetermined time, the user detects the human body detection means. Judgment is made at 13 blind spots that could not be detected. This determination result is input to the variable means 16 as an output of the comparison circuit 29. As a result, the variable means 16 is similar to the operation input from the previous operation panel 25, and the short predetermined time T1 of the short time timer 14a and the long time timer. The long predetermined time T2 of 14b is lengthened, and the next count-up time of the timer means 14 is changed to a long one. Thus, by increasing the time until the burner 2 becomes minute combustion by the combustion restricting means 15, the frequency at which the amount of combustion decreases when the user is in the blind spot of the human body detecting means 13 and is difficult to detect. It is possible to automatically reduce the user discomfort due to frequent room temperature drop.

  Further, as the operation mode of the variable means 16 that receives the output of the comparison circuit 29, another operation mode that replaces the predetermined time T1 and T2 of the timer means 14 so as to have a long time set in advance as described above. An operating mode can be proposed. The variable means 16 has an input unit for reading the current short predetermined time T1 and the long predetermined time T2 of the timer means 14, and is set in advance to the predetermined times T1 and T2 read from this input part. What added the extension time can also be inputted into the variable means 16 as new predetermined time T1 * T2. In this operation mode, the time until the burner 2 changes to minute combustion after the human body non-detection output signal of the human body detection means 13 is output and the operation is stopped is eventually the extension time set in advance from the previous time. It will be longer and the burner 2 will automatically operate less frequently in a minute combustion state, and will automatically match the behavior pattern of the person using the heater. It has become possible to reduce user discomfort.

  Further, in this operation mode, the short predetermined time T1 and the long predetermined time T2 are automatically extended any number of times, so that the human body detecting means 13 shifts to a state where it does not function at all depending on the behavior pattern of the person using the heater. Resulting in. Reference numeral 30 denotes a counter attached to the variable means 16, and this counter 30 counts the number of times this variable means 16 operates during one use of the heater. Then, when the counter 30 receives an instruction to extend the time of the fifth time of the variable means 16, for example, the subsequent time extension instruction is canceled, and the burner 2 burns up only when there is nobody in the room. After changing to micro combustion, we were able to add a function to change the heater to stop operation.

  Further, in the embodiment of FIG. 2, 31 is an alarm means which is activated by the count-up output of the short time timer 14a or the long time timer 14b. The alarm means 31 is activated only for a short time when the short time timer 14a is counted up. The burner 2 is informed that the combustion amount of the burner 2 has changed to minute combustion, or the alarm means 31 is activated for a predetermined time when the timer 14b counts up for a long period of time, and the burner 2 stops operating for the user. I was able to let you know.

  Further, the embodiment shown in FIG. 4 shows the configuration of the human body detection means 13, wherein 32 is a human body sensor forming a detection unit of the human body detection means 13, and 33 is a button provided on the operation panel 25. Selection means for selecting validity / invalidity of the function of the human body detection means 13, 34 is a lamp driving means that is lit when the human body detection means 13 is functioning, 35 is a display lamp, and the user selects a button of the selection means 33. The human body detecting means 13 can be validated or invalidated by operating and the operation of the human body detecting means 13 can be stopped and the heater can be operated continuously even when there is no person. The lamp driving means 34 lights the display lamp 35 while the human body detecting means 13 is in operation, and the display lamp 35 can be turned on / off in conjunction with the selection means 33. The user can know whether or not the human body detection means 13 is operating from a location away from the heater.

  The combustion control means 12, the human body detection means 13, the timer means 14, the combustion regulation means 15 and the like that receive various detection means and signals from the operation unit can be constructed entirely by a computer system. It can also be arranged on the CPU board by function, or it can be incorporated entirely in a one-chip CPU. Further, when configured as a computer system in this way, in order to suppress the increase of various buttons arranged on the operation panel 25, the direct operation unit to the variable means 16, the selection means 33 of the human body detection means 13, etc. It is also possible to make it possible to recognize the input content by short pressing or long pressing.

It is a block diagram which shows the Example of this invention. It is a block diagram which shows the Example of the internal structure of the timer means of this invention. It is explanatory drawing which shows the change of the combustion amount of a burner when the human body detection means of this invention act | operates. It is a block diagram which shows the Example of the internal structure of the human body detection means of this invention. It is sectional drawing of the oil combustor which shows the Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Frame body 2 Burner 3 Pump 4 Combustion fan 5 Air supply path 6 Convection fan 7 Outlet 8 Combustion chamber 9 Indoor temperature detection means 10 Temperature setting means 11 Operation switch 12 Combustion control means 13 Human body detection means 14 Timer means 14a Short time Timer 14b Long time timer 15 Combustion restricting means 16 Variable means 17 Minute combustion timing means

Claims (2)

A burner 2 in the frame 1, a pump 3 for supplying fuel to the burner 2, and a combustion blower 4 for sending combustion air to the burner 2,
A convection blower 6 is provided on the inlet side and a blower outlet 7 is provided on the outlet side of the air passage 5 penetrating the front and rear of the frame body 1. A combustion chamber 8 provided on the upper portion of the burner 2 is opened in the air passage 5. And while making the air which passes this ventilation path 5 into warm air,
An indoor temperature detecting means 9 for detecting the indoor temperature, a temperature setting means 10 for setting the indoor temperature, and the start of combustion of the burner 2 by controlling the pump 3 and the combustion blower 4 based on the signal of the operation switch 11. And combustion control means 12 for stopping,
The combustion control means 12 is a warm air heater that varies the amount of combustion of the burner 2 during combustion using signals from the indoor temperature detection means 9 and the temperature setting means 10.
The warm air heater includes a human body detecting means 13 for detecting the presence of a nearby person, a timer means 14 for measuring a predetermined time, and a combustion regulating means 15 for outputting a control signal to the combustion control means 12;
The timer means 14 is provided with two timekeeping functions for counting when the human body is not detected, and the combustion regulating means 15 forcibly sets the combustion amount by the control signal of the combustion control means 12 with the output counted up by a short predetermined time T1. The combustion control means 15 stops the combustion by the control signal of the combustion control means 12 with the output that is changed to minute combustion automatically and the long predetermined time T2 is counted up,
When the human body detecting means 13 detects the human body while the minute combustion by the combustion regulating means 15 is continued, the combustion control means 12 changes the combustion amount of the burner 2 to the combustion amount based on the signals of the indoor temperature detecting means 9 and the temperature setting means 10. A warm air heater which returns directly or through the maximum combustion amount of the burner 2. The timer means 14 includes a count-up time variable means 16 and a micro-combustion timing means 17 for measuring the duration of the micro-combustion,
When the time of the minute combustion timing means 17 when the minute combustion is released by the signal detected by the human body detecting means 13 is less than a preset time, the variable means 16 is the timer means at the start of combustion. 14. The hot air heater according to claim 1, wherein the hot air heater is modified so that a short predetermined time T <b> 1 for counting 14 human body non-detections is increased.

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