JP6542626B2 - Warm air heater - Google Patents

Description

  The present invention relates to a warm air heater that detects the presence of a person, controls the amount of combustion, and extinguishes.

  Conventionally, in this type of apparatus, combustion control means for starting and stopping combustion of the burner based on the signal of the operation switch and varying the amount of combustion of the burner during combustion, and the vicinity of the hot air heater A human body detection means for detecting the presence of a human being, timer means having two long and short time counting functions for counting during non-human detection, and a combustion control means for outputting a combustion control signal to the combustion control means; The means changes the amount of combustion of the burner to micro combustion by the count-up output of the timer for a short predetermined time while human body is not detected, stops the combustion by the count-up output for a long predetermined time, and reduces the fuel consumption. Further, when a human body is detected during the micro combustion, the combustion control by the combustion control means is restarted directly or through the maximum combustion amount of the burner. (For example, refer to patent document 1.)

JP, 2006-183890, A

  By the way, in this conventional one, although the amount of combustion of the burner is changed to micro combustion by the count-up output of the timer for a short predetermined time while human body is not detected, flames are detected by silicon such as spray or the like when room temperature is low. If the voltage on the flame rod becomes unstable or low because it adheres to the flame rod, there is a problem that the combustion becomes unstable and a misfire occurs if the amount of combustion is changed to micro combustion at a stretch The

In order to solve the above problems, in claim 1 of the present invention , a burner, an electromagnetic pump for supplying fuel to the burner, a combustion fan for sending combustion air to the burner, and air as a combustion gas in the burner Air flow fan that mixes air from the hot air outlet as a warm air, a flame detection unit that detects the flame of the burner, a room temperature sensor that detects room temperature, a timer unit that counts time, and the presence or absence of a person When the human body detection means detects an absence of a human body while driving, the timer starts counting time, and when the time measured by the timer reaches a first predetermined time, the thermal power of the burner is fixed In the warm air heater, the control unit includes a control unit that lowers the heating power and further stops the operation when the time measured by the timer unit reaches a second predetermined time while a person is absent. Timekeeping is the first predetermined When the room temperature detected by the room temperature sensor is above the predetermined temperature, the fixed thermal power of the burner is reduced to the lowest power, and when the room temperature detected by the room temperature sensor is less than the predetermined temperature, the fixed thermal power of the burner is weak Furthermore, when the time measured by the timer unit reaches a first predetermined time, the control unit raises the thermal power of the burner by one step when the flame detection unit determines that the flame is unstable, and the flame detection unit It is repeated until it is determined that the flame is stable by the flame detection means as the fixed thermal power, and the control unit detects the flame when the time measured by the timer unit reaches a first predetermined time. When it is determined that the flame is unstable by means, the power of the burner is raised by one step, which is repeated until the flame is determined to be stable by the flame detecting means, and the thermal power is determined when the flame is determined to be stable by the flame detecting means Is more than the specified power When, in which the fixed heating power and the predetermined thermal.

According to claim 1 of the present invention, when the time measured by the timer portion reaches the first predetermined time, the fixed thermal power of the burner is reduced to the lowest thermal power when the room temperature detected by the room temperature sensor is higher than the predetermined temperature. When the room temperature detected by the sensor is lower than the specified temperature, the fixed thermal power of the burner is reduced to a low thermal power, so fixing the thermal power to the weakest thermal power in a low room temperature makes the combustion unstable, and in some cases a misfire Furthermore, when the time measured by the timer unit reaches a first predetermined time, the control unit raises the power of the burner by one step when the flame detection unit determines that the flame is unstable. Repeat the process until the flame is determined to be stable by the detection means, and when the flame reaches the thermal power which is judged to be stable by the flame detection means, the fixed thermal power is the predetermined thermal power when the thermal power exceeds the predetermined thermal power. Can expect the effect of energy saving When the power goes over the thermal power, the thermal power fixed level in the unmanned state of the energy saving operation is forcedly fixed to the upper limit of the thermal power of the size where the energy saving effect can be expected. Energy saving operation can be prevented.

BRIEF DESCRIPTION OF THE DRAWINGS The perspective view of the warm air heater with one Example of this invention. The same block diagram. FIG.

Next, a warm air heater according to the present invention will be described with reference to an embodiment shown in the drawings.
A hot air outlet 1 is opened and closed by a movable louver 4 provided on the front panel 3 of the main body 2.

  Reference numeral 5 denotes a burner, which is heated by the heater 6 to a predetermined temperature at the start of operation, and is mixed with gas for combustion air sucked by the combustion fan 7 and fuel supplied by the electromagnetic pump 8 to be gasified. It is ignited to be gasified and burned.

  In the present embodiment, the thermal power level of combustion is up to 1 to 25 levels, of which the upper and lower 2 levels are for thermal power adjustment, and the thermal power level in combustion control operation is up to 3 to 23 levels, among which the thermal power level 3 level Is the weakest level, the thermal power level 5 is the weak level, the thermal power level 10 is the middle level, the thermal power level 21 is the strong level, and the thermal power level 23 is the strongest level.

  The combustion gas flows upward from the upper opening (not shown) of the combustion cylinder (not shown) provided at the upper part of the burner 5 and the heat generated by the combustion of the burner 5 by the blower fan 10 is used as warm air with air. The heating operation is performed so that the air is blown out from the hot air outlet 1 and the room temperature detected by the room temperature sensor 11 becomes the set temperature.

An operation unit 12 includes various switches such as an operation switch 13 and an energy saving operation switch 14 for turning on and off the heating operation.
Reference numeral 15 denotes a display unit for displaying a set temperature or a room temperature detected by the room temperature sensor 11 or the like.
Reference numeral 16 denotes a notification unit, which notifies by means of various alarm sounds and voices.

A timer unit 17 includes a long timer unit 18 for measuring a long time and a short timer unit 19 for measuring a short time.
A storage unit 20 is constituted by an EEPROM or the like, which is a non-volatile storage unit, and stores various information such as a detected room temperature and an operating state.
A burner temperature detection means 21 detects the temperature of the burner 5.

A flame detection means 22 detects a flame by a flame rod voltage of a flame rod (not shown) in contact with the flame of the burner 5.
Reference numeral 23 denotes a human body detection means constituted by a human sensor for detecting infrared rays, which is provided at the upper front of the main body 2 and detects the presence or absence of a person near the warm air heater.
Reference numeral 24 denotes a control unit, which performs control of heating operation and control at the time of recovery from a power failure.

Next, the energy saving operation control will be described with reference to FIG.
By operating the energy saving operation switch 14 of the operation unit 12 (S1), when the energy saving operation is being performed (S2), the human body detection means 23 detects the presence or absence of a person (S3), the presence of a person When detecting, compare the set temperature with the temperature value of the current room temperature, and perform the normal combustion control operation to indicate the optimal fuel flow rate and supply air amount, and when not detecting the presence of a person, the timer unit The timer 17 starts counting time. (S4)

  Then, the human body detection means 23 detects the presence or absence of a person (S5), and when the presence of a person is detected, counting of the long timer unit 18 is stopped and reset (S6), the set temperature and the current room temperature Then, the process returns to the normal combustion control operation (S7) in which the fuel flow rate and the supplied air amount are indicated by comparing with the temperature value of (S7), and then the process returns to (S1).

  In addition, when the presence of a person is not detected in (S5), it is determined whether or not the timekeeping of the long timer unit 18 has exceeded the first predetermined time, or 10 minutes or more in the present embodiment, in a state where (S8), if the clocking by the long timer unit 18 is less than 10 minutes, the process returns to (S5), and when the clocking by the long timer unit 18 becomes 10 minutes or more, then the frame rod voltage of the flame detecting means 22 becomes the predetermined voltage It is determined whether or not the frame rod voltage of 4.3 V or less continues for 0.5 seconds or more in the present embodiment for a predetermined time as follows. (S9)

  When the flame rod voltage of 4.3 V or less does not continue for 0.5 seconds or more in (S9), silicon such as spray adheres to the flame rod of the flame detection means and the flame rod at the thermal power level in the current combustion control operation It is determined that the voltage does not become unstable or low, and then it is determined whether the thermal power level in the current combustion control operation is the weak level of the thermal power, that is, 5 levels or less in the present embodiment. (S10)

  When the thermal power level in the current combustion control operation is higher than the weak level 5 in (S10), the thermal power level in the current combustion control operation is then lowered by one level (S11), and the process returns to (S9) When the thermal power level in the present combustion control operation is 5 levels or less of the weak level in S10), the room temperature detected by the room temperature sensor 11 next is less than the minimum setting temperature of the setting temperature that can be set by operating the operation unit 12 In the present embodiment, it is determined whether the temperature is less than 12 ° C. (S12). When the room temperature is less than the minimum set temperature of 12 ° C., it is determined that the combustion becomes unstable if the thermal power is lowered to the weakest level. Then, set the thermal power fixed level in the unmanned state of energy saving operation to 5 levels of weak level. (S13)

When the room temperature is 12 ° C. or more, which is the minimum set temperature in (S12), it is then determined whether the thermal power level in the current combustion control operation is the weakest level, which is 3 levels or less in this embodiment. (S14)
When the power level in the current combustion control operation is higher than the lowest level 3 in (S14), the process returns to (S11), and the power level in the current combustion control operation is the lowest level in (S14). If it is below the level, it is judged that the combustion does not become unstable even if it is lowered to the lowest level, 3 levels in this example, and the power fixed level in the unmanned state of energy saving operation is 3 levels of the lowest level. It is set to. (S15)

  Also, when the flame rod voltage of 4.3 V or less continues for 0.5 seconds or more in (S9), silicon such as spray adheres to the flame rod of the flame detection means at the thermal power level in the current combustion control operation and the flame rod It is determined that the voltage is unstable or low, and then it is determined whether the thermal power level in the current combustion control operation is a middle level, 10 levels or more in the present embodiment. (S16)

  And when the thermal power level in the current combustion control operation is medium or higher in (S16), although there is a possibility that the combustion becomes unstable or misfires, the thermal power fixed level in the unmanned state of the energy saving operation is If it is set larger than the middle level, it is determined that the energy saving effect can not be expected, and the thermal power fixed level in the unmanned state of the energy saving operation is set to the middle level 10 levels. (S17)

  Also, when the thermal power level in the present combustion control operation is less than the middle level, in the present embodiment, less than 10 levels in (S16), the thermal power level in the present combustion control operation is set one level larger next The clocking of the short timer unit 19 is started. (S19)

  Then, it is judged whether or not the time measurement by the short timer unit 19 has become a predetermined time or more (S20). In the present embodiment, the human body detection means 23 detects the presence of a human if the time measurement by the short timer unit 19 is less than 2 minutes of the predetermined time. When the presence of a person is detected, the timing of the short timer unit 19 is stopped and reset (S22), the process returns to (S6), and the presence of a person is detected in (S21). If not detected, the process returns to (S20).

  Then, when the clocking of the short timer unit 19 is at least a predetermined time in (S20), and in the present embodiment, the clocking of the short timer unit 19 is at least two minutes of the predetermined time, the clocking of the short timer unit 19 is stopped and reset. After that (S23), it is determined whether or not the flame rod voltage of the flame detection means 22 continues for a predetermined time or less for a predetermined time, or for this embodiment, the flame rod voltage 4.3 V or less for 0.5 seconds or more. (S24)

  And, when the flame rod voltage of 4.3 V or less does not continue for 0.5 seconds or more in (S24), in a state where the flame rod voltage becomes unstable or lower at the thermal power level in the current combustion control operation Then, it is determined whether the thermal power level in the present combustion control operation is a middle level, that is, 10 levels or more in the present embodiment. (S25)

  And (S25) when the thermal power level in the current combustion control operation is less than the middle level 10 level, it is determined that the flame rod voltage does not become unstable or lower at the current thermal level. The power level fixed level in the unmanned state of energy saving operation is set as the current level. (S26)

  In addition, when the thermal power level in the current combustion control operation at (S25) is medium level 10 or more, although the combustion may become unstable or a misfire may occur, in the unmanned state of the energy saving operation If the thermal power fixed level is set larger than the middle level, it is determined that the energy saving effect can not be expected, and the thermal power fixed level in the unmanned state of the energy saving operation is set to the middle level 10 (S17).

  When the flame rod voltage of 4.3 V or less continues for 0.5 seconds or more in (S24), it is then determined whether the thermal power level in the current combustion control operation is a middle level, 10 levels or more in the present embodiment. (S27)

  When the power level in the current combustion control operation is less than the middle level 10 in (S27), the process returns to (S18), and the power level in the current combustion control operation is the middle level 10 or more in (S27) At that time, although there is a possibility that the combustion may become unstable or misfire, it is judged that the energy saving effect can not be expected if the fixed level of the thermal power in the unmanned state of the energy saving operation is set larger than the middle level. Then, set the thermal power fixed level in the unmanned state of the energy saving operation to the middle level 10 (step S17).

  Then, the operation is continued at the fixed thermal power level in the unmanned state of the energy saving operation set in (S13) or (S15) or (S17) or (S26).

  Then, after setting the thermal power fixed level in the unmanned state of the energy saving operation in (S13) or (S15) or (S17) or (S26), the time counting of the long timer unit 18 in the state of not detecting the presence of a person next It is determined whether or not the second predetermined time has exceeded 50 minutes in the present embodiment. (S27)

  In (S27), when the clocking of the long timer unit 18 becomes 50 minutes or more, it is determined that no person returns to the room, and the clocking of the long timer unit 18 is stopped and reset (S28). The fire extinguishing operation is performed (S29) to stop the operation. (S30)

  In addition, after setting the thermal power fixed level in the unmanned state of the energy saving operation in (S27), the timekeeping of the long timer unit 18 is less than the second predetermined time, less than 50 minutes in the present embodiment, At the time, the human body detection means 23 next detects the presence or absence of a person (S31), and when (S31) detects the presence of a person, it returns to (S6) and detects the presence of a person in (S31) If not, the flame detection means 22 checks whether there is a misfire (S32), and if (S32) does not misfire, the process returns to (S27), and if (S32) a misfire, the display unit 15 An error is displayed (S33), and the process proceeds to (S30).

  As described above, when the human body detection means 23 detects the absence of a human during energy saving operation and the unmanned state continues for a predetermined time, the thermal power in the unmanned state of the energy saving operation when the room temperature is higher than the predetermined temperature. Since the fixed level is fixed to the weakest thermal power, and the room temperature is lower than the predetermined temperature, the thermal power fixed level in the unmanned state of energy saving operation is fixed to the weak thermal power larger than the weakest thermal power. Fixing the force prevents the combustion from becoming unstable and in some cases misfiring, and when the unmanned state continues for a predetermined period of time, the temperature setting and current are immediately set when the person returns. It returns to the normal combustion control operation that compares the temperature value of the room temperature and indicates the optimal fuel flow rate and supply air amount, so it is easy to use and can perform energy saving operation while suppressing fuel consumption in unmanned state It is a thing.

  Also, the human body detection means 23 detects the absence of a human during energy saving operation, and when the unmanned state continues for a predetermined time, the flame detection means 22 detects the state of the burning flame, When it is determined that the state is unstable, the power level in the current combustion control operation is set one level higher to determine whether the flame state is stable, and when it is determined that the flame state is stable, The firepower level is fixed as the firepower fixed level in the unmanned state of energy saving operation, and when it is determined that the flame condition is still unstable, the firepower level in the current combustion control operation is further set one level higher Since it is repeated to determine whether the state is stable, the power saving fixed level in the unmanned state of the energy saving operation can be fixed to the minimum fire power level at which the state of the flame stabilizes, thereby preventing misfire in the unmanned state while unmanned Save energy by reducing fuel consumption It is those that can be carried out.

  In addition, when it is judged that the flame condition is unstable, setting the thermal power level in the current combustion control operation one level higher is repeated, but as a result, the thermal power level becomes higher than the thermal power that can expect the effect of energy saving. At the time, the fixed thermal power level in the unmanned state of the energy saving operation is forced to the upper limit thermal power of the size that the effect of the energy saving can be expected. Can be prevented from becoming an energy saving operation.

DESCRIPTION OF SYMBOLS 1 hot air blower outlet 5 burner 7 combustion fan 8 electromagnetic pump 10 ventilation fan 11 room temperature sensor 17 timer part 23 human body detection means 24 control part

Claims (1)

  A burner, an electromagnetic pump for supplying fuel to the burner, a combustion fan for sending combustion air to the burner, a blower fan for mixing air with the combustion gas in the burner and blowing it out as a warm air from the warm air outlet The flame detection means for detecting the flame of the burner, the room temperature sensor for detecting the room temperature, the timer unit for measuring time, the human body detection means for detecting the presence or absence of a person, and the human body detection means When it detects the absence of time, it starts the clocking of the timer unit, and when the clocking of the timer unit reaches the first predetermined time, the thermal power of the burner is lowered to the fixed thermal power, and the clocking of the timer unit is kept with people still absent In the warm air heater including a control unit for stopping the operation when the second predetermined time is reached, the control unit detects the room temperature sensor when the time measured by the timer unit reaches the first predetermined time. Room temperature is In the above case, the fixed heating power of the burner is reduced to the lowest heating power, and when the room temperature detected by the room temperature sensor is less than the predetermined temperature, the fixed heating power of the burner is reduced to low heating power. When the first predetermined time is reached, when the flame detection means determines that the flame is unstable, the power of the burner is raised by one step, and this is repeated until the flame detection means determines that the flame is stable. The stationary power is determined to be stable, and the control unit determines the thermal power of the burner when the flame detection means determines that the flame is unstable when the time measured by the timer unit reaches a first predetermined time. Step up, repeat until it is judged that the flame is stable by the flame detection means, and when the firepower reaches the predetermined thermal power when the flame reaches the thermal power judged to be stable by the flame detection means, set the fixed thermal power as the predetermined thermal power It is characterized by Warm air heater.

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