KR20030027656A - Hot air room heater - Google Patents

Abstract

PURPOSE: A hot air room heater is provided to reduce manufacturing costs by lowering costs required for arithmetic operation function, while allowing the heater to have a function of alarming the need of air ventilation. CONSTITUTION: A hot air room heater comprises a room temperature sensor(34); a first measurement unit(51) for measuring the width of the indoor area in accordance with the increase of the room temperature sensed by the room temperature sensor; a second measurement unit(52) for measuring the accumulated combustion amount of a burner(10); a memory unit(54) for memorizing the width of the indoor area measured by the first measurement unit and the accumulated combustion amount of the burner measured by the second measurement unit; a calculating unit(55) for calculating, as a parameter for determination, the ratio of the accumulated combustion amount to the width of the indoor area; and an alarm unit(56) for alarming the need of air ventilation when the parameter calculated by the calculating unit is higher than a predetermined threshold level.

Description

Hot air heating unit {Hot air room heater}

The present invention relates to a warm air heating device that performs heating operation by blowing warm air generated by combustion of a burner in a room.

In general, in a room where a warm air heater such as a fan heater is used, oxygen concentration is reduced by carbon dioxide (CO ₂ ) and carbon monoxide (CO) generated by combustion of a burner as a heat source, and thus ventilation is required. For example, in Japanese Patent Laid-Open No. 62-202945, the size of a room is obtained based on the measured value of the rising slope of room temperature, the timer time is set based on the size of the room, and burner combustion during the timer time is continued. A method for informing the need for ventilation has been proposed. In addition, Japanese Patent Application Laid-Open No. 62-223522 discloses the number of ventilation times, the size of a room, the amount of burners burned, the elapsed time from the start of burners, and the concentration of CO is determined based on these measured values. A method of informing the need for ventilation has been proposed when the threshold is exceeded.

However, in the method of notifying the necessity of ventilation by waiting for the elapse of the set timer time, the amount of carbon dioxide and the like is increased by the increase in the combustion amount of the burner accompanied by the change of the set heating temperature before the elapse of the timer time, and despite the need for ventilation, This is not desirable because no notifications are made.

In addition, the method of informing the necessity of ventilation based on the comparison between the CO concentration and the predetermined threshold requires complicated computational processing to accurately calculate the CO concentration, and the manufacturing cost of the warm air-heating and heating apparatus is increased to impart the related computational processing function. There is a concern.

Accordingly, the present invention was devised to solve the above problems,

SUMMARY OF THE INVENTION An object of the present invention is to provide a heating apparatus capable of informing the need for indoor ventilation after the production cost is low and the change in the situation of the room is detected in turn.

1 is a configuration explanatory diagram of a warm air heating device according to the present invention,

Figure 2 is an explanatory view of the notification function of the warm air heating device according to the present invention.

<Description of Signs of Major Parts of Drawings>

10; Burner 13; thermocouple

34; Room temperature sensor 43; Notification lamp

51; First measuring means 52; Second measuring means

53; Third measuring means 54; Memory

55; Calculating means 56; Notification

551; First correction means 552; Second correction means

The heating device according to the present invention for solving the above problems is a room temperature sensor for measuring the room temperature, and the first measuring means for measuring the area of the room based on the elevation of the room temperature measured by the room temperature sensor after the start of warm air heating operation And second storage means for measuring the cumulative combustion amount of the burner, and updating the cumulative combustion amount of the burner measured by the second measuring means while maintaining the area of the room measured by the first measuring means. Storage means for storing, calculation means for calculating a ratio of the cumulative combustion amount of the burner to the area of the room stored by the storage means as a determination parameter, and the determination parameter calculated by the calculation means is equal to or greater than a predetermined threshold value. It is characterized in that it is provided with a notification means for informing the need of ventilation when it is.

According to the present invention, the determination parameter serving as a criterion for notifying the necessity of ventilation is obtained by a simple calculation process of analyzing the ratio of the cumulative combustion amount of the burner to the area of the room.

For this reason, the cost required for arithmetic processing functions can be made low. In addition, the determination parameter reflects a change in the combustion amount of the burner, and the necessity of ventilation is known when the determination parameter becomes equal to or higher than a predetermined threshold value. Thus, after grasping the change in the indoor situation in turn it can inform the need of indoor ventilation.

Further, the present invention includes third measuring means for measuring the ventilation amount of the room based on the lowering of the room temperature measured by the room temperature sensor or the rising of the output of the thermocouple detecting the combustion state of the burner. The means is provided with first correction means for reducing and correcting the determination parameter in response to the ventilation amount measured by the third measuring means.

According to the present invention, the determination parameter is decreased and compensated by the fact that the room temperature decreases due to indoor ventilation or the combustion state of the burner improves and the output of the thermocouple rises. Therefore, even if the determination parameter is excessively calculated and the need for ventilation is lowered, it is possible to avoid the situation where the need for ventilation is known.

The calculating means may include second correction means for gradually decreasing and correcting the determination parameter after the burner stops combustion.

According to the present invention, since the determination parameter is reset to 0 when the burner is reburned at a low concentration due to a large amount of CO _2, etc. remaining in the room after the burner stops combustion, it is underestimated, and despite the need for ventilation, The situation where the need for ventilation is unknown can be avoided.

In addition, the notifying means is characterized by informing the necessity of the ventilation when the output of the thermocouple for detecting the combustion state of the burner becomes less than a predetermined output value.

According to the present invention, even when the determination parameter is higher than or equal to the predetermined threshold, the output of the thermocouple becomes lower than or equal to the predetermined output value, and when the combustion failure of the burner is detected, the O ₂ concentration is low, thereby indicating the need for ventilation. Thus, even if the necessity notification of the ventilation based on the one determination parameter is not smooth, the necessity of the ventilation may be informed based on the output value of the thermocouple.

EMBODIMENT OF THE INVENTION Embodiment of the warm air heating apparatus of this invention is described using drawing.

FIG. 1 is a diagram for explaining the configuration of a warm air conditioner according to the present embodiment, and FIG. 2 is a diagram for explaining the notification function of the warm air conditioner according to the present embodiment.

The warm air heating device shown in FIG. 1 includes a burner 10, a combustion fan 20, and a first duct 31 in which indoor air is collected as combustion air from the intake port 311 by the operation of the combustion fan 20. As shown in FIG. ) And the second duct 32 which collects indoor air from the inlet 321 by the operation of the combustion fan 20, mixes with the combustion exhaust gas of the burner 10, and blows it out as warm air at the blower 322. And a control panel 50 capable of setting a heating temperature and the like, and a control unit 50 for controlling the combustion lamp of the burner 10.

The burner 10 is provided in the combustion cylinder 33 arrange | positioned inside the 2nd duct 32, the gas supply path 11 which joins the 1st duct 31 in the upstream, and the downstream (upward) Ignition electrode 12 is provided. Further, a thermocouple 13 is provided downstream of the burner 10. In addition, the gas supply passage 11 is provided with a gas gauge solenoid valve 111, a gas solenoid valve 112, and a gas proportional valve 113.

The combustion fan 20 includes a rotating blade 21 installed inside the second duct 32 and a motor 22 for rotating the rotating blade 21, and the rotating shaft of the motor 22 is configured by a hall IC or the like. The rotation speed sensor 23 is provided.

Intake ports 311 and 321 of the first and second ducts 31 and 32 are provided with a filter 330 which prevents dust and debris from entering the first and second ducts 31 and 32. have. The room temperature sensor 34 is provided near the inlet port 321 of the second duct 32. The blower 322 of the second duct 32 is provided with a movable louver 36 which is driven by the geared motor 35 and adjusts the opening degree of the blower 322.

The operation panel 40 includes an operation button 41 for switching ON / OFF of the warm air heating operation, a setting button 42 for setting the heating temperature, and a notification lamp (liming means; 43) informing the need of ventilation. Equipped.

The control unit 50 includes a first measuring means 51, a second measuring means 52, a third measuring means 53, a storage means 54, a calculating means 55, and a notifying means ( 56 and a timer 57 are provided.

The first measuring means 51 measures the area A of the room based on the elevation ΔΘ / Δt (> 0) of the room temperature Θ measured by the room temperature sensor 34. The second measuring means 52 measures the cumulative combustion amount Q of the burner 10 based on the opening degree of the gas proportional valve 113. The third measuring means 53 measures the ventilation amount V in the room based on the drop ΔΘ / Δt (<0) of room temperature Θ measured by the room temperature sensor 34.

The storage means 54 is constituted by a RAM, a ROM, or the like, and stores the area A of the room measured by the first measurement means 51 and a predetermined threshold C, which will be described later, and the second measurement means ( 52 is stored while updating the cumulative combustion amount Q of the burner 10 measured by 52 in order.

The calculation means 55 calculates the ratio Q / A of the cumulative combustion amount Q of the burner 10 to the area A of the room stored by the storage means 54 as the determination parameter K. As shown in FIG. The calculating means 55 is the same as the first correction means 551 which decreases and corrects the determination parameter K in response to the ventilation amount V measured by the third measuring means 53, as described later. As described above, the second correction means 552 is provided for reducing and correcting the determination parameter K based on the measurement time of the timer 57 after the combustion stop of the burner 10.

The notification means 56 includes a notification lamp 43 as a component, and the determination parameter K calculated by the calculation means 55 is equal to or greater than a predetermined threshold value C stored in the storage means 54. The notification lamp 43 is turned on to indicate the necessity of the ventilation when the display is turned on.

Subsequently, the function of the warm air heating device will be described with reference to FIG. 2.

First, when the operation button 41 of the operation panel 40 turns from OFF to ON, the combustion fan 20 starts to operate by the control unit 50, the lighting electrode 12 ignites, and the gas electrons. The valve 112 is opened to adjust the opening degree of the gas control valve 113. As a result, the gas supplied from the gas supply passage 11 in the first duct 31 and the indoor air collected from the intake port 311 are mixed and supplied to the burner 10, and the burner 10 starts combustion. (S1). In the second duct 32, the indoor air collected from the intake port 321 is mixed with the combustion exhaust gas of the burner 10, and the air is blown into the blower opening 322 indoors. Then, the room temperature Θ gradually rises, and the control unit 50 matches the heating temperature Θ measured by the room temperature sensor 34 to the heating temperature set by the setting button 42 of the operation panel 40. The opening ratio of the gas proportionality valve 113 and the rotation speed of the combustion fan 20 are controlled. After 1 minute has elapsed from the commencement of burning of the burner 10, the first measurement means 51 is based on the elevation ΔΘ / Δt of the room temperature Θ measured by the room temperature sensor 34 over 3 minutes therefrom. The area A of the room where the warm air heater is placed is measured based on a predetermined calculation algorithm stored in the storage means 54 and the corresponding relational data table between the elevation ΔΘ / Δt and the area A of the room. (S2). For example, when the room temperature (Θ) before the start of warm air heating operation is 5 ° C and the set heating temperature is 22 ° C, if the elevation ΔΘ / Δt over 3 minutes is 4.0 ° C, 5.1 ° C, and 6.3 ° C, the area of each room (A ) Is measured in 12 (about 6 pyeong), 8 (about 4 pyeong), 6 (about 3 pyeong). In this way, the area A of the room tends to increase as the elevation ΔΘ / Δt is small. At this time, the storage means 54 stores and maintains the measured area A of the room.

Further, after the burner 10 starts to burn, the second measuring means 52 starts to measure the cumulative combustion amount Q based on the opening degree of the gas proportional valve 113 (S3). At this time, the storage means 54 stores and stores the accumulated combustion amount Q measured by the second measuring means in turn.

Next, the calculation means 55 calculates the determination parameter k = Q / A by dividing the cumulative combustion amount Q stored and stored by the storage means 54 by the area A of the room (S4).

Subsequently, the third measuring means 53 determines whether indoor ventilation is present or not based on whether the change of room temperature Θ is negative or not. When it is determined that the room is ventilated (YES in S5), the first correction means 551 performs the first reduction correction of the determination parameter k based on the drop ΔΘ / Δt (<0) of the room temperature Θ ( S6). For example, if the drop ΔΘ / Δt is less than −3.0 [° C./min], the room is greatly ventilated and there is no need for further ventilation. Therefore, k is reduced to zero. In addition, when the drop degree ΔΘ / Δt is less than −3.0 [° C./min] or more and less than −2.0 [° C./min], the room is ventilated to reduce the need for ventilation, thereby reducing k by 0.5 times. In addition, when the drop degree ΔΘ / Δt is more than -2.0 [° C./min] and less than 0 [° C./min], the room ventilation is insufficient and still needs to be ventilated. In this way, the first reduction correction is largely reduced and corrected as the determination parameter k is largely lowered in the room temperature Θ.

Next, the first measuring means 51 determines whether the combustion of the burner 10 has stopped based on the output of the thermocouple 13 (S7). When combustion of the burner 10 is stopped (YES in S7), the timer 57 starts time measurement. Then, the second correction means 552 performs the second reduction correction of the determination parameter k based on the measurement time of the timer 57 (S8). The second reduction correction does not reduce the need for ventilation immediately after the combustion stop of the burner 10, but as time passes, the concentration of CO _{2 in the} room gradually decreases, and the need for ventilation decreases. It is done based on qualitative consideration. That is, the determination parameter k is maintained as it is until a fixed time after the combustion stop of the burner 10, and gradually decreases and corrects after a predetermined time elapses. The notification means 56 is calculated by the calculation means 55 (S4), and the determination parameters k which are reduced and corrected by the first and second correction means 551 and 552 (S6 and S8) are stored. The means 54 judges whether or not it is above a predetermined threshold C stored in storage (S9). When it is determined that the determination parameter k is equal to or greater than the predetermined threshold C (YES in S9), the notifying means 56 turns on the noting lamp 43 to notify the necessity of indoor ventilation (S10a). On the other hand, when it is determined that the determination parameter k is less than the predetermined threshold C (NO in S9), the notifying means 56 keeps the notification lamp 43 off, but turns off when it is lit. (S10b).

Thereafter, unless the power plug (not shown) is disconnected from the outlet and the energized state of the warm air conditioner is released (NO in S11), the above-described processing of S3 to S10 is executed and continues.

According to this warm air heating unit, the determination parameter k serving as a criterion for notifying the necessity of ventilation is determined by a simple calculation process of calculating the ratio of the cumulative combustion amount Q of the burner 10 to the area A of the room. Is obtained (S4 in Fig. 2). This makes it possible to reduce the cost required for the arithmetic processing function. Moreover, in the determination parameter k, the fluctuation | variation of the combustion amount of the burner 10 is reflected, and the necessity of ventilation is known when the determination parameter k becomes more than predetermined threshold C (S10a of FIG. 2). The situation change in the room can be grasped as an example, and then the need for indoor ventilation can be informed.

Moreover, the room temperature (degreeC) measured by the room temperature sensor 34 by the room ventilation accepted that 1st fall correction is performed to determination parameter k (S6 of FIG. 2). Therefore, even when the determination parameter k is excessively calculated and the necessity of ventilation is reduced, the situation where the necessity of ventilation is known can be avoided. In addition, the second reduction correction is performed on the determination parameter k in response to the elapsed time after the burnout of the burner 10 (S8 in Fig. 2). Therefore, when burner 10 is burned down and burner 10 is reburned in a state where much CO ₂ or the like remains in the room and the O 2 concentration is low, the determination parameter k is underestimated, and there is a need for ventilation. Nevertheless, a situation in which the need for ventilation is unknown can be avoided. In addition, in this embodiment, the necessity of ventilation is visually informed by the lighting of the notification lamp 43, but as another embodiment, the necessity of ventilation may be known audibly by a notification buzzer or the like.

In the present embodiment, the necessity of ventilation is known based on only the determination parameter k. As another embodiment, the burner 10 not only notifies the notification means 56 when the determination parameter k is equal to or higher than the predetermined threshold C. The necessity of ventilation may be known when the output of the thermocouple 13 for detecting the combustion state of the gas becomes below a predetermined output value.

According to another embodiment, even when the determination parameter k is not above the predetermined threshold C, the output of the thermocouple 13 is below the predetermined output value, and when the combustion failure of the burner 10 is detected, the O ₂ concentration is lowered to ventilate. Can inform the need. Thus, even if the necessity notification of the ventilation is not smooth based on the one determination parameter k, the necessity of the ventilation can be informed based on the output value of the thermocouple 13.

According to the warm air heating apparatus according to the present invention described above, the determination parameter serving as a criterion for notifying the necessity of ventilation is obtained by a simple calculation process of analyzing the ratio of the cumulative combustion amount of the burner to the area of the room. For this reason, the cost required for arithmetic processing functions can be made low. In addition, in the determination parameter, a change in the combustion amount of the burner is reflected, and the necessity of ventilation is known when the determination parameter becomes equal to or more than a predetermined threshold value. Thus, after grasping the change in the indoor situation in turn it can inform the need of indoor ventilation.

In addition, according to the present invention, the determination parameter is reduced and corrected by receiving room air or lowering the room temperature or improving the combustion state of the burner to increase the output of the thermocouple. Therefore, even if the determination parameter is excessively calculated and the need for ventilation is lowered, it is possible to avoid the situation where the need for ventilation is known.

After the burner stops burning, when the burner is reburned in a state where a large amount of CO2 remains in the room and the concentration is low, the determination parameter is reset to 0. You can avoid the unknown situation.

Here, even when the determination parameter is equal to or higher than the predetermined threshold, the output of the thermocouple becomes equal to or lower than the predetermined output value, and when the combustion failure of the burner is detected, the O 2 concentration is low, thereby indicating the need for ventilation. Thus, even if the necessity notification of the ventilation based on the one determination parameter is not smooth, the necessity of the ventilation can be informed based on the output value of the thermocouple.

Claims (4)

In the warm air heating device that performs the warm air heating operation by blowing the warm air generated by the combustion of the burner in the room, A room temperature sensor for measuring room temperature, A first measuring means for measuring the area of the room after the start of the warm air heating operation based on the elevation of the room temperature measured by the room temperature sensor; Second measuring means for measuring the cumulative combustion amount of the burner; A storage means for storing and maintaining the area of the room measured by the first measuring means and simultaneously updating and storing the accumulated combustion amount of the burner measured by the second measuring means; Calculation means for calculating, as a determination parameter, the ratio of the cumulative combustion amount of the burner to the area of the room stored by the storage means; And a notifying means for informing the necessity of the ventilation when the determination parameter calculated by the calculating means becomes equal to or higher than a predetermined threshold value. The method of claim 1, And third measuring means for measuring the ventilation amount of the room based on the drop of room temperature measured by the room temperature sensor or the output increase of the thermocouple detecting the combustion state of the burner. And a first correction means for reducing and correcting the determination parameter in response to the ventilation amount measured by the means. The method according to claim 1 or 2, And the calculating means includes second correction means for gradually decreasing and correcting the determination parameter after the burner stops combustion. The method according to any one of claims 1 to 3, And said notifying means notifies a need for ventilation when the output of the thermocouple for detecting the combustion state of said burner becomes below a predetermined output value.