JPH0442574B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a control device for a heater that detects indoor temperature and controls heating capacity, and particularly relates to improving comfort at the start of operation.

[Prior Art] In a heater, in order to maintain a constant indoor temperature, the amount of heating is controlled based on the temperature set by the user and the temperature detected by a room temperature sensor or the like. In addition, in order to continue heating at the maximum normal heating capacity (hereinafter referred to as "rated maximum heating amount") regardless of the detected temperature in extremely cold weather or in rooms with insufficient insulation, the rated maximum heating amount A switch etc. is provided for fixing it. Furthermore, in order to improve the rise in room temperature at the start of operation, within a certain period of time (for example, 15 minutes) from the start of operation,
When the detected temperature is under a predetermined condition with respect to the set temperature, for example, when the detected temperature is lower than the set temperature and the temperature difference is above a certain temperature, the heating amount larger than the rated maximum heating amount (hereinafter referred to as "extra large heating amount") Heating is performed at

[Problems to be Solved by the Invention] Therefore, conventionally, when the heating amount is fixed to the rated maximum heating amount at the start of operation, heating with an extra-large heating amount continues for a certain period of time regardless of the detected temperature.
Therefore, when the indoor temperature is not very low, such as at the change of seasons or when restarting the room after it has been heated, or when the room is small compared to the heating capacity of the heater, the indoor temperature may become high. There are cases where it becomes too much. Therefore, there is a problem that excessive heating causes discomfort to the user.

The present invention is suitable for cases where the indoor temperature is not very low,
To provide a control device for a heating machine that does not cause discomfort to a user even when the heating machine is used in a narrow room, and allows heating to start up quickly.

[Means for Solving the Problems] The present invention includes a temperature setting means for setting the temperature in a room heated by the heating means, and a temperature detection means for detecting the temperature in the room, and a temperature detection means for detecting the temperature in the room. the set temperature set by the setting means;
In a heating machine control device that sets a heating amount of the heating means according to a temperature difference between the temperature detected by the temperature sensing means and the temperature detected by the temperature sensing means, heating for fixing the heating amount of the heating means at least strongly. When the heating amount fixing means is strongly fixed at the beginning of heating and the detected temperature is equal to or higher than a predetermined temperature, the heating means is set to the temperature difference between the set temperature and the detected temperature. technical means to control the heating amount to a maximum heating amount determined according to the heating amount, and to control the heating means to an extra-large heating amount larger than the maximum heating amount when the detected temperature is less than the predetermined temperature. shall be.

[Function] In the present invention, when the heating amount fixing means is strongly fixed at the beginning of heating, if the detected indoor temperature is less than a predetermined temperature, the heating means adjusts the difference between the set temperature and the detected temperature. The amount of heating is controlled to be an extra-large amount that is larger than the maximum amount of heating determined according to the temperature difference.

In addition, if the detected indoor temperature is higher than a predetermined temperature, or if the detected temperature rises,
The heating means is controlled to a maximum heating amount among the heating amounts determined by the temperature difference between the set temperature and the detected temperature.

[Effects of the Invention] In the present invention, the heating capacity of the heating means is controlled to an extra-large heating amount only when the detected indoor temperature is below a predetermined temperature, so when the indoor temperature is low, the temperature increases rapidly. In addition to being able to
When the room temperature rises, the heating amount of the heating means can be suppressed to the maximum heating amount. Therefore, the indoor temperature is less likely to become too high and cause discomfort to the user.

[Example] Next, the present invention will be explained based on examples.

FIG. 2 shows the configuration of a gas fan heater 1 using the heater control device of the present invention. configured.

The air circulation path 10 is formed by a casing 10a, and air is sucked in through a suction port 12 provided with a filter 11 by the operation of a convection fan 13. A part of the air sucked into the casing 10a is guided as combustion air through the air introduction pipe 14, and is passed through the nozzle 2 provided in the air introduction pipe 14.
The fuel mixing chamber 1 together with the fuel gas ejected from 1
5. The fuel gas mixed with air in the fuel mixing chamber 15 passes through the flame port of the burner 16 and is combusted, and the combustion gas is mixed with other air sucked in from the suction port 12 in the air mixing chamber 17, causing convection. The hot air is blown into the room from the fan 13 through the hot air outlet 18 .

The fuel supply path 20 guides fuel gas supplied from a fuel supply source (not shown) to the above-mentioned nozzle 21 through a gas pipe 22. A solenoid valve 24, a governor 25, and a proportional valve 26 are each provided. The gas pipe 22 also includes a bypass pipe 27 for supplying fuel gas even when the proportional valve 26 is closed, and a bypass pipe 27 for supplying fuel gas even when the proportional valve 26 is at its maximum opening. A bypass pipe 28 is provided in parallel with the proportional valve 26, and the bypass pipe 27 is provided with a flow rate adjustment screw 27a for adjusting the minimum supply amount of fuel gas, and the bypass pipe 28 is provided with a flow rate adjustment screw 27a for adjusting the minimum supply amount of fuel gas. Solenoid valve 28a for
are provided for each.

As shown in FIG. 1, the control device 30 is composed of a control circuit 40 centered on a microcomputer and a safety circuit 40a independent of the control circuit 40. An operating section (not shown) is provided with an operating switch 31, a room temperature controller 32, and a room temperature sensor 33 for detecting room temperature. here,
The room temperature controller 32, as shown in FIG.
The position of any one of the temperature setting part 32a, the weak fixing part 32b, and the strong fixing part 32c is selected and set by the knob 32A that slides according to the user's operation. Here, the temperature setting part 32a is located at a position to set the indoor heating target temperature, for example in the range of 16°C to 26°C, and the weakly fixed part 32b is located at a position to set the combustion amount of the burner 16 regardless of the detected indoor temperature. The strong fixing portion 32c, which is a position for fixing the combustion amount to the minimum combustion amount, is also a position for fixing the combustion amount of the burner 16 to the maximum combustion amount.

In addition, the control device 30 includes, in the vicinity of the burner 16,
A thermocouple 34 for detecting the temperature of flame due to combustion and a sparker 35 for ignition are provided. Further, a rapid heating switch 36 for quickly raising the indoor temperature at the start of heating is provided in an operation section (not shown).

The control circuit 40 is operated by power constantly supplied by inserting a power plug into a power line outlet, and has a sequence control section 41 , a combustion control section 42 , and a blowing control section 43 .

When the operation switch 31 is operated, the sequence control unit 41 operates the sparker 35 in a predetermined sequence, opens each electromagnetic valve 23 and 24 to supply fuel gas to the burner 16 to start combustion, and also opens the thermocouple 34. When combustion in the burner 16 is no longer detected, the electromagnetic valves 23 and 24 are controlled to close to stop combustion.

The combustion control unit 42 controls the burner 16 according to the temperature difference between the temperature set by the room temperature controller 32 and the indoor temperature detected by the room temperature sensor 33.
The combustion amount is determined, and the opening degree of the proportional valve 26 is controlled. Here, when the detected indoor temperature is 2° C. higher than the temperature set by the room temperature controller 32, the proportional valve 26 is closed to minimize the fuel supply amount, and when the indoor temperature is 2° C. lower than the set temperature, the proportional valve 26 is opened to the maximum. Temperatures between these temperatures are controlled proportionally to the temperature difference between the indoor temperature and the set temperature, and the proportional valve 26 is controlled proportionally. Further, when the room temperature controller 32 is set to the weak fixing portion 32b, the proportional valve 26 is fixed in the closed state and the burner 16 is fixed.
When fuel gas is supplied only from the bypass pipe 27 to the strong fixed portion 32c, the proportional valve 16
The opening degree is fixedly controlled to the maximum opening degree so that the rated maximum heating amount can be obtained.

The combustion control unit 42 also controls the rapid heating switch 36 within a certain period of time after the start of combustion, for example within 15 minutes.
When is operated, the solenoid valve 28a is controlled as follows according to the indoor temperature detected by the room temperature sensor 33 and the setting state of the room temperature controller 32.

(a) The solenoid valve 28a is set in the temperature setting section 32a, and the solenoid valve 28a is closed when the indoor temperature is higher than the set temperature or when the indoor temperature is lower than the set temperature and the temperature difference is less than 2°C.

(b) When the indoor temperature is set in the temperature setting part 32a and is 2°C or more lower than the set temperature, the solenoid valve 28a
Open.

(c) When the strong fixing portion 32c is set and the detected indoor temperature is less than a predetermined temperature (for example, 26° C.), the solenoid valve 28a is opened.

(d) The solenoid valve 28a is set to the strong fixing portion 32c and is closed when the detected indoor temperature is equal to or higher than a predetermined temperature (for example, 26° C.).

(e) When set to the weak fixing portion 32b, the solenoid valve 28a is closed.

The air blowing control unit 43 controls the convection fan 13 according to the combustion temperature in the burner 16 detected by the thermocouple 34 .

The safety circuit 40a receives a signal from an overheat switch (not shown) whose contacts open when the temperature in the air mixing chamber 17 inside the casing 10a rises to a predetermined temperature, and the safety circuit 40a switches the original solenoid valve regardless of the control state of the control circuit 40. 23 and the main solenoid valve 24 to stop combustion in the burner 16.

Next, the operation of the gas fan heater 1 of this embodiment having the above configuration will be explained.

When the operation switch 31 is turned on, the sparker 3
5 starts the ignition operation. When the operation of the sparker 35 is detected, the original solenoid valve 23 and the main solenoid valve 24
opens, a current value corresponding to the maximum combustion amount is applied to the proportional valve 26, and a corresponding amount of fuel gas is ejected from the nozzle 21, and is supplied to the fuel mixing chamber 15 together with the air passing through the air introduction pipe 14. The mixture becomes a mixture, which is ignited by the burner 16.

When ignition is detected by the thermocouple 34, the sparker 35 stops operating, and the burner 16 operates according to the setting state of the room temperature controller 32, the detected temperature of the room temperature sensor 33, and the operating state of the rapid heating switch 36. Burns with the following combustion amount.

When the rapid heating switch 36 is not operated, the solenoid valve 28a is closed, and when the room temperature controller 32 is set to the weak fixing portion 32b or the strong fixing portion 32c, the proportional valve 26 is closed or to the maximum opening, respectively. controlled temperature setting section 3
When set to 2a, the opening degree is controlled to correspond to the temperature difference between the temperature detected by the room temperature sensor 33 and the temperature detected by the room temperature sensor 33. Therefore, fuel gas is supplied according to the opening degree of the proportional valve 26, and combustion is performed in the burner 16 according to the control state of the proportional valve 26.

When the rapid heating switch 36 is operated,
Each burns with the following combustion amount.

(A) When the room temperature controller 32 is set in the temperature setting section 32a and the indoor temperature is higher than the set temperature, or when the indoor temperature is lower than the set temperature and the temperature difference is less than 2°C, the solenoid valve 28a is closed. Therefore, fuel gas is supplied according to the opening degree of the proportional valve 26, and combustion is performed in the burner 16 according to the control state of the proportional valve 26.

(a) When the room temperature controller 32 is set in the temperature setting section 32a and the indoor temperature is 2°C or more lower than the set temperature, the solenoid valve 28a is opened, and at this time the opening degree of the proportional valve 26 is the maximum opening degree. It is. Therefore, the fuel gas flows through the proportional valve 26 which is set to the maximum opening degree.
Since the fuel passes through the electromagnetic valve 28a and the electromagnetic valve 28a, it is supplied in an extra-large amount, and combustion is performed in the burner 16 with an extra-large amount of combustion.

(c) When the room temperature controller 32 is set to the strong fixed part 32c and the detected indoor temperature is less than a predetermined temperature (for example, 26°C), the solenoid valve 28a is opened, and the proportional valve 26 is opened. The degree is the maximum opening degree. Therefore, since the fuel gas passes through the proportional valve 26 and the electromagnetic valve 28a which are set to the maximum opening degree, the fuel gas is supplied in an extra large amount, and the burner 16 performs combustion with an extra large amount of combustion.

(d) When the room temperature controller 32 is set to the strong fixed part 32c and the detected indoor temperature is higher than a predetermined temperature (for example, 26°C), the solenoid valve 28a is closed and the proportional valve 26 is opened. The degree is the maximum opening degree. Therefore, the fuel gas passes only through the proportional valve 26 set to the maximum opening degree and does not pass through the solenoid valve 28a, so that the burner 16 performs combustion at a combustion amount that provides the rated maximum heating amount.

(E) When the room temperature controller 32 is set to the weakly fixed portion 32b, the solenoid valve 28a is closed, and at this time the proportional valve 26 is closed, so the fuel gas passes only through the bypass pipe 27. Thus, the burner 16 performs combustion with the minimum amount of combustion.

The convection fan 13 is controlled according to the output signal of the thermocouple 34, and the indoor air sucked in from the suction port 12 is mixed with combustion gas generated by the combustion of the burner 16 in the air mixing chamber 17, and is appropriately mixed with the combustion gas generated by the combustion of the burner 16. Warm air outlet 18 generates warm air with controlled air volume.
The air is blown out from the air, and heating operation is performed.

As described above, in this embodiment, when the indoor temperature is fixed at strong heating by the room temperature controller, the indoor temperature is detected, and if the temperature is higher than the predetermined temperature, combustion is not performed at an extra large combustion amount, and heating is performed. The heating amount during operation is suppressed to the rated maximum heating amount. Therefore, since the indoor temperature is lower than the predetermined temperature at the start, if the setting is fixed to strong heating, heating will be performed with an extra large amount of heating, so the indoor temperature can be raised quickly, and then the indoor temperature will be lower than the specified temperature. When the temperature rises, this is detected and the extra-large amount of heating is stopped and the amount of heating is reduced to the rated maximum amount. For this reason, heating with an extra large amount of heating is not performed forever, so the indoor temperature does not become too high.
Therefore, the user is less likely to feel uncomfortable.

In the above embodiment, the room temperature controller 32 was shown using the sliding knob 32A shown in FIG. 3, but as shown in FIG. A switch 32d may be provided for each temperature.

In the above embodiments, a fan heater using a gas burner was used as the heat source, but FF combustion or other fuels may be used. Moreover, the heating device may not use gas as a heating source, but may use oil or electricity.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a control device for a gas fan heater according to an embodiment of the present invention, and FIG. 2 is a schematic configuration diagram showing the configuration of a gas fan heater according to the present invention.
FIG. 3 is a front view showing a first embodiment of the room temperature controller, and FIG. 4 is a front view showing a second embodiment of the room temperature controller. In the figure, 32... Room temperature controller (temperature setting means, heating amount fixing means), 33... Room temperature sensor (temperature detection means), 40... Control circuit (heater control device).

Claims (1)

[Scope of Claims] 1. A temperature setting means for setting the temperature in a room heated by the heating means, and a temperature detection means for detecting the temperature in the room, the temperature being set by the temperature setting means. In the heating machine control device, the heating amount of the heating means is determined according to a temperature difference between a set temperature set by the heating means and a detected temperature detected by the temperature sensing means, the heating amount of the heating means being at least strongly increased. A heating amount fixing means is provided for fixing the heating amount, and when the heating amount fixing means is strongly fixed at the initial stage of heating start,
When the detected temperature is equal to or higher than the predetermined temperature, the heating means is controlled to a maximum heating amount determined according to the temperature difference between the set temperature and the detected temperature, and the detected temperature is set to the predetermined temperature. If the heating amount is less than the maximum heating amount, the heating unit is controlled to an extra-large heating amount that is larger than the maximum heating amount.