JP2920007B2 - Heating system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating device provided with a movable louver.

[0002]

2. Description of the Related Art In a conventional heating apparatus, fuel is supplied to a vaporizer by an electromagnetic pump, the fuel is heated and vaporized by the vaporizer, and the vaporized fuel is supplied to a burner for combustion. The warm air heated by the combustion of the burner is blown out of the apparatus through a warm air port by a fan. At this time, a movable louver is provided in the hot air outlet, and the movable louver is driven by, for example, a stepping motor or the like to change its angle and control the blowing direction of the hot air. Conventionally, the driving of the movable louver has been performed without controlling the combustion level or the like at all.

[0003]

In the conventional heating apparatus, the electromagnetic pump supplies a large amount of fuel to the carburetor in accordance with the level of combustion, so that the power consumption becomes large.
Therefore, when the movable louver is driven by, for example, a stepping motor when the combustion level is high, the maximum power consumption of the device increases. If the capacity of the power transformer is increased in response to such an increase in the maximum power consumption, there is a problem that a large and expensive power transformer must be used.

Accordingly, an object of the present invention is to provide a heating apparatus which can suppress an increase in power consumption when driving a movable louver, and therefore does not need to use a large and expensive power transformer.

[0005]

SUMMARY OF THE INVENTION The present invention is directed to a heating apparatus provided with an electromagnetic pump for supplying fuel to a combustor and for blowing warm air heated by the combustor by a blowing means, wherein the air is blown by the blowing means. A movable louver for controlling the direction of hot air, a room temperature detecting means for detecting a room temperature, a temperature setting means for setting a temperature, and a room temperature detected by the room temperature detecting means based on a temperature set by the temperature setting means.
A louver driving means for operating the movable louver, and a combustion control means for previously reducing the output of the electromagnetic pump when operating the movable louver by the louver driving means are provided.

[0006]

In the present invention having such a configuration, the room temperature is detected by the room temperature detecting means, and the temperature is set by the temperature setting means.

When the movable louver is operated by the louver driving means based on the room temperature detected by the room temperature detecting means based on the temperature set by the temperature setting means, the output of the electromagnetic pump is reduced in advance by the combustion control means.

[0008]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of a heating apparatus to which the present invention is applied. Hot air heated by a burner 31 as a combustor is blown by a convection blower 32 as blowing means driven by a fan motor 7. Air is blown from the hot air outlet 33 to the outside. This hot air outlet 3
3 is provided with a plurality of movable louvers 34 capable of changing the angle for controlling the direction of the hot air to be blown. FIG. 2 is a diagram showing a circuit configuration around a power supply of the heating device.

Reference numeral 1 denotes a commercial AC power supply. A vaporizer heater (H) 3 for heating a vaporizer for vaporizing fuel through a normally open contact 2 of a first relay to a power supply line from the AC power supply 1. A fan for driving the convection fan 32 via an ignition transformer (IG) 5 for igniting fuel vaporized in the burner 31 via a normally open contact 4 of a second relay and a light receiving side triac 6 of a phototriac. Motors (FM) 7 are connected to each other, and a DC power supply circuit 8 is also connected to a power supply line of the AC power supply 1.

The DC power supply circuit 8 is composed of a power transformer, a rectifying / smoothing circuit (not shown), and the like. The motor power supply V 1 rectifies and smoothes the AC current supplied from the AC power supply 1, DC power of the pump power supply V2 and the control power supply Vcc is supplied to the control unit 9. FIG. 3 is a diagram showing a circuit configuration of the control unit 9. 1
Reference numeral 1 denotes a control circuit including a microcomputer and a memory (not shown) constituting a control unit main body, and a control power supply Vcc of the DC power supply circuit 8 is connected to the control circuit.

An input terminal I provided in the control circuit 11
1 is the first A / D (analog / digital) inside
A conversion circuit (not shown) is built in and connected to a connection point between a room temperature thermistor 12 as room temperature detection means and a resistor 13 connected in series between a control power supply Vcc and ground (0 V). A divided voltage output from a connection point of a series voltage dividing circuit of the room temperature thermistor 12 and the resistor 13 is digitally converted by the first A / D conversion circuit and supplied to the microcomputer. ing. The input terminal I2 has a built-in second A / D conversion circuit (not shown) therein, and has a variable resistor 27 and a resistor 28 as temperature setting means connected in series between the control power supply Vcc and the ground. Is connected to the connection point. A divided voltage output from a connection point of the series voltage dividing circuit of the variable resistor 27 and the resistor 28 is digitally converted by the second A / D conversion circuit and supplied to the microcomputer. .

The output terminal O provided in the control circuit 11
1, an exciting coil 17 of the first relay connected to an output terminal O2 and an output terminal O3 via a first inverter 14, a second inverter 15 and a third inverter 16, respectively; Excitation coil 1 for relay
8 and the light-emitting photodiode 19 of the phototriac are connected to a motor power supply V1. Further, an electromagnetic pump 21 connected to the output terminal O4 via the fourth inverter 20 is connected to an electromagnetic pump power supply V2. Further, the fifth inverter 2 is connected to the output terminal O5, the output terminal O6, the output terminal O7, and the output terminal O8.
2. A stepping motor (SM) 26 connected via a sixth inverter 23, a seventh inverter 24, and an eighth inverter 25 is connected to a motor power supply V1. When the stepping motor 26 as the louver driving means is driven, the operation of changing the angle of the movable louver 34 is performed. FIG. 4 is a diagram showing a flow of a main part process performed by the microcomputer provided in the control circuit 11.

First, combustion control for controlling the output of the electromagnetic pump is performed based on the room temperature detected by the thermistor 12 with reference to a set temperature set by adjusting the resistance value of the variable resistor 27.

Next, as step 1, it is determined whether or not the louver flag formed in the memory provided in the control circuit 11 is "1". If the louver flag is not "1" (if "0"), then the room temperature detected by the thermistor 12 is subtracted from the set temperature set by the variable resistor 27, and the value is subtracted from a preset value T. It is determined whether it is large. If the value obtained by the subtraction is larger than the preset value T, as shown in FIG. 5, the angle of the movable louver 34 is set to “R2”, and the value obtained by the subtraction is set to the preset value T. If less than, the value obtained by subtraction is a preset value−
It is determined whether the value is smaller than T, and if the value obtained by the subtraction is equal to or more than the preset value -T, the angle of the movable louver 34 is set to "R1", and the value obtained by the subtraction is If the value is smaller than the set value −T, the angle of the movable louver 34 is set to “R”.
Set to "0".

When the angle of the movable louver 34 is set,
Next, the current angle of the movable louver 34 is confirmed, and it is determined whether or not an operation of changing the angle of the movable louver 34 is necessary for the set angle. That is, if the current angle of the movable louver 34 is the same as the set angle, it is determined that the operation of changing the angle is not necessary.

Here, when it is determined that the operation of changing the angle of the movable louver 34 is not necessary, the process returns to the beginning of the main processing. When it is determined that the operation of changing the angle of the movable louver 34 is necessary, the louver flag is set to “1”, and the current combustion level is stored in the memory as Px.

Next, as step 2, it is confirmed whether or not the current combustion level is the minimum level L0. Here, if the combustion level is not the lowest level L0, the output of the electromagnetic pump 21 is lowered to make the combustion level the lowest level L0 (combustion control means). Then, the process returns to the beginning of the main processing. If the current combustion level is the lowest level L0,
By driving the stepping motor 26, the movable louver 34
Is performed to change the angle of the movable louver to the set angle, and whether or not the operation of changing the angle of the movable louver has been completed is determined based on whether or not the angle of the movable louver 34 has reached the set angle. If the operation of changing the angle of the movable louver 34 is not completed, the process returns to the beginning of the main processing.
When the operation of changing the angle of the movable louver 34 is completed, the louver flag is set to “0”, and based on the level Px stored in the memory, the output of the electromagnetic pump 21 is controlled to set the combustion level to the level Px. . Then, the process returns to the beginning of the main processing. Further, in the process of determining whether or not the louver flag is "1" as step 1, if the louver flag is "1", the process proceeds to step 2. In the present embodiment having such a configuration, the room temperature is detected by the thermistor 12, and the temperature is set by adjusting the resistance value of the variable resistor 27.

On the basis of the room temperature detected by the thermistor 12 based on the temperature set by the variable resistor 27,
The burner 3 is controlled by controlling the output of the electromagnetic pump 21.
One combustion level is controlled.

The angle of the movable louver 34 is set based on the room temperature detected based on the set temperature. If the set angle is not the same as the current angle of the movable louver 34, first, the current combustion After the level Px is stored in the memory, the output of the electromagnetic pump 21 is reduced to set the combustion level to the minimum level L0. Then, the stepping motor 26 is driven to change the angle of the movable louver 34.

When the angle of the movable louver 34 reaches the set angle, it is determined that the operation of changing the angle of the movable louver 34 has been completed, and the electromagnetic pump 21 is controlled to return to the combustion level Px stored in the memory.

As described above, according to this embodiment, the output of the electromagnetic pump 21 is set to the minimum level L0 before the operation of changing the angle of the movable louver 34 is performed to drive the stepping motor 26. Lower its power consumption. Accordingly, an increase in power consumption when the angle of the movable louver is changed by driving the stepping motor 26 is reduced.
The output of the electromagnetic pump 21 can be suppressed by temporarily lowering it, and as a result, an increase in the maximum power consumption of the device can be suppressed. Therefore, the power transformer provided in the DC power supply circuit does not need to use a large and expensive power transformer corresponding to the sum of the maximum outputs of both the stepping motor and the electromagnetic pump.

[0023]

As described in detail above, according to the present invention,
An increase in power consumption when the movable louver is driven can be suppressed, and therefore, a heating device that does not require the use of a large and expensive power transformer can be provided.

[Brief description of the drawings]

FIG. 1 is a sectional view showing one embodiment of the present invention.

FIG. 2 is a diagram showing a circuit configuration around a power supply of the embodiment.

FIG. 3 is a diagram showing a circuit configuration of a control unit of the embodiment.

FIG. 4 is a view showing a flow of a main part process of the embodiment.

FIG. 5 is a view showing a set angle of the movable louver of the embodiment.

[Explanation of symbols]

31 burner, 34 movable louver, 11 control circuit (microcomputer, memory, etc.), 12 thermistor, 21 electromagnetic pump, 26 stepping motor, 2
7. Variable resistor 27.

Claims (1)

(57) [Claims] 1. A heating device comprising an electromagnetic pump for supplying fuel to a combustor and blowing hot air heated by the combustor by a blowing unit, wherein the movable unit controls a direction of the hot air blown by the blowing unit. Louvers, room temperature detecting means for detecting room temperature, temperature setting means for setting a temperature, and operating the movable louver based on the room temperature detected by the room temperature detecting means based on the temperature set by the temperature setting means. A heating device comprising: a louver drive unit; and a combustion control unit that previously reduces an output of the electromagnetic pump when the movable louver is operated by the louver drive unit.