JPH0827074B2 - Heating system - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a heating device for heating indoor air, and particularly to heating control of a heating means at the initial stage of operation.

[Prior Art] As a conventional heating device, there is known a technique of performing rapid heating in which the heating amount of air by the heating means is increased when the temperature difference obtained by subtracting the temperature of the room air from the set temperature is large at the beginning of operation. There is.

The rapid heating is stopped when the temperature difference becomes smaller than a predetermined temperature or the rapid heating is performed for a predetermined time. The heating amount of air by the heating means is set based on the temperature difference.

[Problems to be Solved by the Invention] As shown above, when the temperature difference is large at the beginning of operation,
Rapid heating brings the temperature of indoor air to the set temperature quickly. However, even if the temperature of the room air approaches the set temperature due to rapid heating, the temperature of the walls and furniture in the room is still low.

Therefore, even if the temperature of the indoor air approaches the set temperature due to rapid heating, the indoor person such as the user is deprived of heat by the walls and furniture, the sensible temperature decreases, and as a result, it feels cold. Had a point.

An object of the present invention is to provide a heating device that does not make people feel cold even when walls and furniture are cold.

[Means for Solving the Problems] In order to achieve the above object, the heating device of the present invention is
The following technical means shown in the configuration of FIG. 1 are adopted.

The heating device 1 includes heating means 2 for heating air, temperature setting means 3 for setting the temperature of room air heated by the heating means 2, temperature detecting means 4 for detecting the temperature of the room air, and And a control device 5 for setting the heating amount of air by the heating means 2.

The control device 5 obtains the heating amount of the heating means 2 based on the temperature difference between the set temperature set by the temperature setting means 3 and the detected temperature detected by the temperature detecting means 4, and detects the detected temperature. When the state of being lower than the set temperature by a predetermined temperature or more continues for a predetermined time or more, the heating amount is increased, and conversely,
Heating setting means 6 for decreasing the heating amount when the detected temperature is higher than the set temperature by a predetermined temperature or more for a predetermined time or more; and the heating when the temperature difference is larger than the predetermined temperature at the initial stage of operation. Rapid heating means 7 for performing rapid heating to maximize the amount of heating of air by the means 2, and when the rapid heating by the rapid heating means 7 is finished and the operation is switched to normal operation by the heating setting means 6,
The correction unit 8 increases the heating amount without waiting for the elapse of the predetermined time.

[Operation and Effect of the Invention] When the rapid heating is completed, the temperature of the indoor air is close to the set temperature. However, when the rapid heating is completed, the interior walls and furniture placed inside the room are still cold. For this reason, if the conventional heating device is used, the heat of the person in the room is taken away by the cold wall or furniture, and the sensible temperature of the person in the room decreases, and the person feels cold.

However, in the present invention, the room air is overheated by the correction means after the end of the rapid heating. That is, in the state where the rapid heating is completed, the temperature of the indoor air becomes higher than that in the state where the normal heating control (heating control by the heating setting means) is performed.

As a result, even after the completion of rapid heating, even if the wall, furniture, etc. are in a cold state, the heating device of the present invention can prevent a reduction in the sensible temperature of the person in the room, and the person in the room does not feel cold. .

When the heating device is started in a relatively warm room such as when restarting, rapid heating is not performed. Therefore, the correction unit does not operate, and the heating setting unit performs the normal heating control.

The normal heating control will be described. For example, when the heating load is large, such as when the room is large, the walls, floors, and furniture are cold, the amount of heating is not appropriate if the temperature is simply controlled by the temperature difference obtained by subtracting the detected temperature from the set temperature. However, the heat of the people in the room is taken away by the cold walls and furniture, which reduces the sensible temperature and makes us feel cold.

However, in the present invention, when the state where the temperature difference is large continues for a predetermined time or more, the heating amount is increased and the room is overheated, so that the reduction of the sensible temperature is prevented and the person in the room is appropriately heated. be able to.

Conversely, if the heating load is small, such as when the room is small, the walls, floors, and furniture are warm, the amount of heating can be reduced by simply controlling the temperature difference by subtracting the detected temperature from the set temperature. Even if appropriate, the heat of the person in the room is given by the heated walls and furniture, raising the sensible temperature and feeling the heat.

However, in the present invention, when the state in which the temperature difference is small continues for a predetermined time or more, the heating amount is reduced and the indoor space is suppressed and heated, so that the increase in the sensible temperature is prevented and the indoor person is appropriately heated. be able to.

[Embodiment] Next, a heating apparatus of the present invention will be described based on an embodiment shown in the drawings.

(Structure of Embodiment) FIGS. 2 to 10 show an embodiment of the present invention, and FIG. 2 is a schematic sectional view of an FF type (compulsory air supply / exhaust type) gas hot air heating apparatus.

The gas hot air heating device 10 is composed of a heater main body 11, a gas supply passage 12, and a control device 13, which will be described next in order.

B) Description of the heater body 11.

The heater body 11 includes an indoor air passage 14 through which indoor air circulates.
A combustor 15 is arranged inside.

The indoor air passage 14 has an air inlet 1 for sucking indoor air.
6, the warm air outlet 17 that blows out the air that has passed through the indoor air passage 14 toward the room, the indoor air is sucked from the air inlet 16, and the sucked air creates an air flow from the warm air outlet 17 to the room. It consists of a convection fan 18.

The combustor 15 includes an outdoor air passage 19 that guides outdoor air and discharges the outdoor air again. Inside the outdoor air passage 19 arranged in the indoor air passage 14, a burner plate 20 made of ceramic is provided. To the burner plate 20, the combustion fan 21 sends the outdoor air for combustion, and the gas supply passage 12 sends the fuel gas. Then, on the surface of the burner plate 20, the supplied gas burns with the outdoor air. The outdoor air passage 19 for guiding the combustion gas generated by the combustion to the outside is a heat exchanger for exchanging heat between the combustion gas inside and the air flowing in the indoor air passage 14.
It is provided as 22.

The heat exchanger 22 is the heating means of the present invention for heating the air blown into the room.

B) Explanation of the gas supply passage 12.

The gas supply passage 12 supplies the gas supplied from a gas supply source (not shown) to the outdoor air passage 19 upstream of the burner plate 20.
This is the passage for the gas to be supplied inside. Into the gas supply passage 12, from the upstream side, a source solenoid valve 23 and a main solenoid valve 24 that connect and disconnect the gas, a governor valve 25 that supplies the gas at a constant pressure, and a gas passage amount (supply A proportional valve 26 for adjusting the quantity is provided. A nozzle for ejecting gas into the outdoor air passage 19 is provided at the downstream end of the gas supply passage 12.
27 are provided.

The proportional valve 26 has a bypass pipe upstream and downstream thereof.
You are contacted at 28. The bypass pipe 28 is provided with an orifice 29 that allows a constant flow rate of gas to pass therethrough.

C) Description of the control device 13.

The control device 13 is provided with a microcomputer, and has the convection fan 18, the combustion fan 21, and the original solenoid valve 2 described above.
3. The main solenoid valve 24, the proportional valve 26, and the sparker 30 installed near the burner plate 20 are energized according to the procedure programmed in the microcomputer.

Further, the control device 13 includes, as an input means, an operation switch 31 operated by a user to start and stop the gas warm air heating device 10, and a temperature setting means 32 (for example, a variable temperature set to a room temperature desired by the user. Resistance), temperature detection means 33 (for example, a thermistor) attached to the air inlet 16 to detect the temperature of the room air, and a thermocouple 34 to detect the temperature of the flame formed on the burner plate 20.

The control device 13 also includes known circuits such as a power supply circuit and a safety circuit.

D) Explanation of combustion control.

Next, an example of combustion control programmed in the microcomputer of the controller 13 will be described with reference to FIGS.

As described above, the heating means of this embodiment is the heat exchanger 22. The amount of air heated by the heat exchanger 22 (heating means) is controlled by the amount of gas burned in the burner plate 20, that is, the opening degree of the proportional valve 26, in other words, the energization current value of the proportional valve 26.

The energizing current value of the proportional valve 26 of the present embodiment is 8 from 1st speed to 8th speed.
In the step switching, the conduction current value is the smallest in the first speed, the conduction current value is larger as the number of speeds is larger, and the conduction current value is the largest in the eighth speed. In addition, the 8th speed is used only for rapid heating and forced strong combustion to stabilize combustion,
Details will be described later.

An example of combustion control will be described with reference to the flowchart of FIG.

When the power plug of the gas warm air heating device 10 is inserted into the outlet (start), it is determined whether or not the operation switch 31 is turned on (step S1). This step S1
When the result of the determination is NO, the process returns to step S1. If the decision result in the step S1 is YES, a series of ignition control is carried out (step S2). Then, forced strong combustion is performed for 60 seconds (step S3).

Next, the room temperature set by the temperature setting means 32 (hereinafter,
It is determined whether the temperature difference obtained by subtracting the temperature of the indoor air (hereinafter, detected temperature) detected by the temperature detection means 33 from the set temperature) is larger than the first predetermined temperature (for example, 2.33 ° C.). Perform (step S4). The determination result of step S4 is YES
In the case of, rapid heating operation is performed by the rapid heating means of the present invention (step S5).

After the rapid heating operation is completed, or when the result of the determination in step S4 is NO, the temperature setting heating operation is performed by the heating setting means of the present invention (step S6).

Then, it is determined whether the operation switch 31 is turned off (step S7). The result of this step S7 is
If NO, the process returns to step S6, and the determination result of step S7 is
If YES, the stop control of the gas warm air heating device 10 is performed (step S8), and then the process returns to step S1.

E) Explanation of forced strong combustion.

Next, the forced strong combustion will be described with reference to the flowchart of FIG.

In the forced strong combustion, first, the temperature difference obtained by subtracting the detected temperature from the set temperature is the same as the second predetermined temperature (for example, the first predetermined temperature).
2.33 ℃), it is judged whether it is higher (step
S9). If the decision result in the step S9 is YES, the proportional valve 26 is energized at the 7th speed for 10 seconds (step S10), and then 50
The proportional valve 26 is energized at 8th speed per second (step S11).

If the result of the determination in step S9 is NO, it will be 7 for 60 seconds.
The proportional valve 26 is energized at high speed (step S12).

F) Explanation of rapid heating operation.

Next, the rapid heating operation by the rapid heating means will be described with reference to the flowchart of FIG.

In the rapid heating operation, first, the combustion speed is set to 8th speed (step S13). Next, it is judged whether or not the temperature difference obtained by subtracting the detected temperature from the set temperature is larger than the third predetermined temperature (for example, 1.67 ° C.) (step S14). This step S14
If the result of the determination is YES, it is determined whether 15 minutes have elapsed since the operation switch 31 was turned on (step S1).
Five). If the decision result in the step S15 is NO, the process returns to the step S14.

When the determination result of step S15 is YES or when the determination result of step S14 is NO, it means that the control by the rapid heating means is switched to the control by the heating setting means. Therefore, the correction speed is set to 1 speed in order to add the correction heating amount to the appropriate heating amount set in step S6 by the correction means (step S16).

G) Explanation of temperature control heating operation.

Next, the temperature control heating operation by the heating setting means will be described with reference to the flowchart of FIG. In the heating setting means of this embodiment, the temperature difference obtained by subtracting the detected temperature from the set temperature is ± 4th predetermined temperature (for example, the basic speed is 4th speed ± 0.
If a state other than 333 ° C) continues for a predetermined time (for example, 10 minutes), correction control is performed to add or subtract 1 as the correction speed to the basic speed. It is applied.

First, the basic speed which is an appropriate heating amount is determined (step S17). The basic speed of the present embodiment is determined by the temperature difference obtained by subtracting the detected temperature from the set temperature, and FIG. 7 shows an example of the relationship between the temperature difference and the basic speed.

Then, the sum speed of the basic speed and the corrected speed is determined (step S18). If the sum speed is 0 or less, the combustion speed is set to 1 (step S19). If the sum speed is 8 or more, the combustion speed is set to 7 (step S20).
Further, when the sum speed is 1 or more and 7 or less, the combustion speed is set to the speed obtained by adding the basic speed and the corrected speed (step S21).

Then, it is determined whether or not the basic speed is the fourth speed (step S22). If the decision result in the step S22 is NO, it is decided whether or not the 10-minute timer for counting a predetermined time (for example, 10 minutes) is in operation (step S23). If the determination result in step S23 is NO, the 10-minute timer is activated (step S24). Next, it is determined whether 10 minutes have elapsed since the 10-minute timer started operating (step S25). If the decision result in the step S25 is NO, the process advances to a step S7. If the decision result in the step S25 is YES, a correction speed changing control is carried out (step S26).

If the determination result in step S22 is YES, the operation of the 10-minute timer is stopped (step S27), and the process proceeds to step S7.

H) Explanation of correction speed change control.

Next, the correction speed change control performed during the temperature control heating operation will be described with reference to the flowchart of FIG.

First, it is determined whether or not the basic speed is 5 or more (step S28). If the result of this determination is YES, it is determined whether or not the correction speed is 3 speeds or more (step S2).
9). If the determination result in step S29 is NO, the correction speed is obtained by adding 1 speed to the correction speed up to now (step
S30). If the decision result in the step S29 is YES, the correction speed is set to the third speed (step S31).

If the determination result in step S28 is NO, the correction speed is −
It is determined whether or not the second speed or lower (step S32). If the result of the determination in step S32 is NO, the correction speed is reduced by one from the correction speed up to now (step S3).
3). If the result of the determination in step S32 is YES, the correction speed is set to -3 speed (step S34).

 Then, the basic speed is determined (step S35).

If the basic speed is 1 speed, the range of the correction speed is -1 to 0.
Speed (step S36). If the basic speed is 2 speed,
The range of the correction speed is -2 to +3 speed (step S3
7). If the basic speed is 6th speed, the range of the correction speed is -3.
Up to +2 speed (step S38). If the basic speed is 7th speed, the range of the correction speed is 0 to + 1st speed (step S3).
9).

(Operation of Embodiment) Next, the operation of the embodiment according to the present invention will be briefly described with reference to FIG. The solid line A in the figure indicates the temperature difference obtained by subtracting the detected temperature from the set temperature, and the solid line B indicates the combustion speed number. Further, the broken line C indicates the combustion speed number in a state where the present invention is not applied. In order to make the explanation easier to understand,
The correction control of the heating setting means does not work.

When the operation switch 31 is turned on and the temperature difference obtained by subtracting the detected temperature from the set temperature is larger than the first predetermined temperature (2.33 ° C.), the combustion speed is set to 8 and rapid heating is performed. When the temperature of the indoor air rises due to rapid heating and the temperature difference becomes smaller than the third set temperature (1.67 ° C.), the combustion speed is conventionally set to the basic speed of 6th, but the correction of the present invention By the means, the correction speed is added to the basic speed by one speed, and the combustion speed is set to seven speeds. That is, the excessive combustion causes the indoor air to be excessively heated. Similarly, when the temperature of the indoor air rises and the temperature difference becomes smaller than 1 ° C., the conventional combustion speed is set to the fifth basic speed, but the correction means of the present invention increases the combustion speed to six. The air velocity is increased and the room air is overheated. Furthermore, the temperature of the indoor air rises and the temperature difference is zero.
When the temperature is lower than 333 ° C., the combustion speed is conventionally set to the fourth speed, which is the basic speed, but the correction means of the present invention sets the combustion speed to the fifth speed and the indoor air is excessively heated. .

(Effect of Example) When rapid heating is performed, the room is cold,
Even if the temperature of the room air rises due to the rapid heating, the interior walls, furniture, etc. are in a cooled state when the rapid heating is completed. And cold walls and furniture deprive people of the temperature inside the room. However, the gas hot air heating device 10 of the present embodiment is
Heats the room air excessively even after the rapid heating is completed.

As a result, the gas hot air heating device 10 prevents the indoor person from feeling a cold temperature and prevents the indoor person from feeling cold even after the rapid heating is finished and the walls and furniture are in a cold state.

(Operation of Correction Control of Heating Setting Means) Next, the operation of the correction control applied to the heating setting means of this embodiment will be briefly described with reference to FIG. The solid line D in the figure indicates the temperature difference obtained by subtracting the detected temperature from the set temperature, and the solid line E indicates the combustion speed number. Further, the broken line F indicates the combustion speed number in the state where the correction control is not applied. In order to make the explanation easy to understand, it is assumed that the correction speed is initially 0 speed.

When 10 minutes have passed after the basic speed is 7 and the correction speed is 0, the correction speed becomes 1 speed by the correction control, and the sum of the basic speed and the correction speed becomes 8 speed. However, in the case of the temperature-controlled heating operation, the maximum combustion speed is 7th speed, so the combustion speed is set to 7th speed. At time t1, the basic speed becomes 6th speed, but the combustion speed becomes 7th speed by adding the corrected speed 1st speed. That is, the combustion speed of 7 is maintained. When 20 minutes have passed, the correction control adds one speed to the correction speed and the correction speed becomes two. That is, the sum of the basic speed and the corrected speed becomes 8th speed again. At time t2, the basic speed becomes 5th speed, but the combustion speed becomes 7th speed by adding the corrected speed of 2nd speed. That is, the combustion speed of 7 is maintained. At time t3 before 30 minutes have elapsed, the basic speed becomes 4th speed. The combustion speed is
The correction speed of 2 is added to obtain 6 speed. That is, time
At t3, the combustion speed is shifted to 6th speed.

(Effect of the correction control of the heating setting means) The correction control applied to the heating setting means increases the heating amount of air by the correction control even when used in a condition where the indoor temperature does not easily rise, such as when the heating load is large. Therefore, it is possible to quickly heat the interior of the room and shorten the time for making the person in the room feel the cold, as compared with the case without the correction control.

Similarly, when the temperature of the indoor air is too high and it is difficult to cool, the correction control reduces the amount of overheat of the air. It is possible to shorten the time for making people feel uncomfortable due to heat.

(Modification) In the present embodiment, an example is shown in which the rapid heating operation is performed when the temperature difference between the set temperature and the detected temperature is large at the time of startup, but at the time of startup, even if the temperature difference is small, a predetermined time (for example, The set temperature may be changed before the lapse of 15 minutes) and the rapid heating operation may be performed even if the temperature difference becomes large.

The present invention may be applied to a fan precedent type hot air heating device that controls a combustion fan according to the amount of combustion.

Although the correction heating amount is set to a constant value (first speed), it may be changed depending on, for example, the temperature increase rate at room temperature.

Although the heat exchanger is shown as an example of the heating means, the present invention is applied to the combustion part as the heating means, such as a gas fan heater in which combustion gas is introduced into the room, or an electric heater that generates heat by energization, A heating portion such as a hot water heater or an oil heater may be applied as the heating means. Of course, the present invention may be applied to a heating device that burns fuel such as kerosene.

[Brief description of drawings]

FIG. 1 is a block diagram showing the outline of the present invention. 2 to 10 show an embodiment of the present invention, and FIG. 2 is a schematic sectional view of an FF type gas warm air heating device, FIG. 3, FIG. 4, FIG. 5, FIG. FIG. 8 is a flow chart showing an example of combustion control programmed in the control device,
FIG. 7 is a pattern showing the relationship between the temperature difference and the basic speed,
FIG. 10 and FIG. 10 are time charts for explaining the operation. In the figure, 1 ... Heating device, 2 ... Heating means 3 ... Temperature setting means, 4 ... Temperature detecting means, 5 ... Control device, 6 ... Heating setting means, 7 ... Rapid heating means, 8 ... Correction means

Claims (1)

[Claims] 1. (a) heating means for heating air; (b) temperature setting means for setting the temperature of room air heated by this heating means; and (c) temperature for detecting the temperature of the room air. Detecting means, and (d) (d-1) obtaining a heating amount by the heating means based on a temperature difference between the set temperature set by the temperature setting means and the detected temperature detected by the temperature detecting means, When the detected temperature is lower than the set temperature by a predetermined temperature or more and continues for a predetermined time or more, the heating amount is increased,
On the contrary, when the detected temperature is higher than the set temperature by a predetermined temperature or more for a predetermined time or more, heating setting means for reducing the heating amount, (d-2) the temperature difference is higher than the predetermined temperature at the initial stage of operation. If it is larger, rapid heating means for performing rapid heating to maximize the amount of air heated by the heating means, (d-3) rapid heating by the rapid heating means ends, and normal operation by the heating setting means is switched to. In this case, the heating device includes: a control device including a correction unit that increases the heating amount without waiting for the predetermined time to elapse.