JPH0261417A - Controller for heater - Google Patents

Abstract

PURPOSE:To improve start-up of heating without giving any unpleasant feeling to the user by controlling a heating means to a maximum thermal output when a detected temperature is not lower than a predetermined temperature, and controlling the heating means to an extra high thermal output when the detected temperature is lower than the predetermined temperature. CONSTITUTION:When a detected room temperature is not lower than a predetermined temperature (e.g., 26 deg.C), a solenoid valve 28a is closed, when the opening of a proportional valve 26 is at its maximum. Thus, a fuel gas is passed through only the proportional valve 26 set to the maximum opening and is not passed through the solenoid valve 28a. Therefore, a burner 16 is made to perform combustion with such a combustion quantity that a rated maximum thermal output is obtained. When the detected room temperature is lower than the predetermined temperature (e.g., 26 deg.C), the solenoid valve 28a is opened, when the opening of the proportional valve 26 is at its maximum. Thus, the fuel gas is passed through the valve 26 set to the maximum opening and through the valve 28a, namely, the fuel gas is supplied in an extra large quantity. Therefore, the burner 16 is made to perform combustion with an extra high thermal output.

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 J'') regardless of the detected temperature in extremely cold weather or in rooms with insufficient insulation, the rated maximum heating amount In addition, in order to improve the rise in indoor temperature at the start of operation, the detected temperature will reach the set temperature within a certain period of time (for example, 15 minutes) after the start of operation. On the other hand, under certain conditions, for example, when the detected temperature is lower than the set temperature and the temperature difference is above a certain temperature, heating is performed with a heating amount larger than the rated maximum heating amount (hereinafter referred to as "extra-large heating amount"). It will be done.

[Problems to be Solved by the Invention] Therefore, conventionally, when the heating amount is fixed at the rated maximum heating amount at the start of operation, heating with an extra-large heating amount is continued for a certain period of time regardless of the detected temperature.

For this reason, when the indoor temperature is not very low, such as at the change of seasons or when restarting the operation after the indoor room has been heated,
If the room is small compared to the heating capacity of the heater, the room temperature may become too high. Therefore, there is a problem that excessive heating causes discomfort to the user.

The present invention provides a control device for a heating machine that does not cause discomfort to the user and that heats up quickly even when the indoor temperature is not very low or when the heating machine is used in a small room. The purpose is to

[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. In a heating machine control device that determines the heating amount of the heating means according to the temperature difference between the set temperature set by the setting means and the detected temperature detected by the temperature sensing means, the heating amount of the heating means is determined. The heating amount fixing means is provided with a heating amount fixing means for fixing the heating amount, and when the heating amount fixing means is operated at the initial stage of heating start, if the detected temperature is less than a predetermined temperature, the heating means is set between the set temperature and the detected temperature. technical means to control the heating amount to a maximum heating amount determined according to the temperature difference between the shall be.

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

In addition, if the detected indoor temperature is a predetermined temperature transformation,
Alternatively, if the detected temperature increases, the heating means
The heating amount is controlled to be the maximum heating amount determined by the temperature difference between the set temperature and the detected temperature.

[Effect of the invention 1 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 rises rapidly. In addition to being able to cool the room, if the indoor temperature rises by two months, 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,
A convection fan 1 is connected to a suction port 12 equipped with a filter 11.
Air is sucked in by the operation of step 3.

A part of the air sucked into the casing 10a is guided as combustion air through the air introduction pipe 14, and is supplied to the fuel mixing chamber 15 together with the fuel gas ejected from the nozzle 21 provided in the air introduction pipe 14. Ru. Fuel mixing chamber 15
The fuel gas mixed with air 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, and then the convection fan 1
3, the warm air is blown into the room from the hot air outlet 18.

The fuel supply passage 20 guides fuel gas supplied from a fuel supply source (not shown) to the above-mentioned nozzle 21 through a gas pipe 22.The fuel supply passage 20 includes a former solenoid valve 23, a main solenoid valve, and a main solenoid valve from the upstream side. 24, a governor 25, and a proportional valve 26 are provided, respectively. Additionally, a proportional valve 26 is provided in the gas pipe 22.
A bypass pipe 27 for supplying fuel gas even when the proportional valve 26 is opened and a bypass pipe 28 for further supplying fuel gas when the proportional valve 26 is opened to the maximum degree are connected to the proportional valve 26. A flow rate adjusting screw 27a is provided in parallel to the bypass pipe 27 to adjust the minimum supply amount of fuel gas.
However, each bypass pipe 28 is provided with a solenoid valve 28a for shutting off fuel gas.

As shown in FIG. 1, the control device 30 includes an operation switch 31 and a room temperature controller 32, which are comprised of a control circuit 40 centered on a microcomputer, and a safety circuit 40a independent of the control circuit 40. A room temperature sensor 33 for detecting room temperature is provided in an operation section (not shown). Here, room temperature controller 3
2, as shown in FIG. 3, one of the positions of the temperature setting part 32a, the weak fixed part 32b, and the strong running part 32c is selected and set by a knob 32A that slides according to the user's operation. . Here, the temperature setting part 32a is a position for setting the indoor heating target temperature, for example, in the range of 16°C to 26°C, and the weak fixing part 32b is a position for setting the combustion amount of the burner 16 regardless of the detected indoor temperature. Similarly, the solid running portion 32c is a position for fixing the combustion amount of the burner 16 to the maximum combustion amount.

The control device 30 is also provided with a thermocouple 34 near the burner 16 for detecting the temperature of the flame caused by combustion, and a sparker 35 for ignition. moreover,
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 operates the thermocouple 34 When combustion in the burner 16 is no longer detected, each solenoid valve 2
3 and 24 to the open state to stop combustion.

The combustion control unit 42 determines the combustion amount of 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, and controls the opening degree of the proportional valve 26. .

Here, the detected indoor temperature is determined by the room temperature controller 32.
When the temperature is 2°C higher than the set temperature, the proportional valve 26 is operated to minimize the fuel supply amount, and the indoor temperature is 2°C higher than the set temperature.
When the temperature is low, the proportional valve 26 is controlled to the maximum opening degree, and at temperatures between that temperature, the proportional valve 26 is proportionally controlled according to the temperature difference between the indoor temperature and the set temperature. Furthermore, when the room temperature controller 32 is set to the weak fixed section 32b, the proportional valve 26 is fixed in the closed state and fuel gas is supplied to the burner 16 only from the bypass pipe 27, and when the room temperature controller 32 is set to the strong running section 32c. In this case, the opening degree of the proportional valve 16 is controlled to be fixed at the maximum opening degree so that the rated maximum heating amount can be obtained.

The combustion control unit 42 also controls the combustion control unit 42 within a certain time after the start of combustion.
For example, when the rapid heating switch 36 is operated within 15 minutes, the indoor temperature detected by the room temperature sensor 33;
Depending on the setting state of the room temperature controller 32, the solenoid valve 28a is controlled as follows.

a) It is set in the temperature setting part 32a, and when the indoor temperature is higher than the set temperature and 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.

B) When the indoor temperature is set in the temperature setting section 32a and is 2° C. or more lower than the set temperature, the solenoid valve 28a is opened.

c) If the indoor temperature is set in the solid running part 32c and detected is less than a predetermined temperature (for example, 26°C), the solenoid valve 28
Open a.

Work》When the indoor temperature is set to the solid running part 32c and detected is higher than a predetermined temperature (for example, 26°C), the solenoid valve 28
Close a.

e) When set to the weak fixed part 32b, the solenoid valve 28
Close a.

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 connects the air mixing chamber 1 in the casing 10a.
When the temperature inside the main solenoid valve 7 rises to a predetermined temperature, a signal from an overheat switch (not shown) whose contacts open is used to stop energizing the original solenoid valve 23 and the main solenoid valve 24, regardless of the control state of the control circuit 40. Then, combustion of the burner 16 is stopped.

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 35 starts ignition operation. When the operation of the sparker 35 is detected, the original solenoid valve 23 and the main solenoid valve 24 open, and the proportional valve 26 opens.
A current value corresponding to the maximum combustion amount is applied to the nozzle 21, 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 to form an air-fuel mixture, which is then heated in the burner. Ignition at 16.

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

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 fixed portion 32b or the hard running portion 32c, the proportional valve 26 is closed or to the maximum opening, respectively. When controlled and set in the temperature setting section 32a, the opening degree is controlled to correspond to the temperature difference from 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, combustion is performed at the following combustion amounts.

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, and when the indoor temperature is lower than the set temperature and the temperature difference is less than 2°C,
Since the electromagnetic valve 28a is closed, 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.

b) When the room temperature controller 32 is set in the temperature setting part 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 at the maximum opening degree. be. 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.

(1) When the room temperature controller 32 is set to the rigid running section 32c and the detected indoor temperature is less than a predetermined temperature (for example, 26° C.), the solenoid valve 28a is opened, and at this time, the opening of the proportional valve 26 is the maximum opening. Therefore, since the fuel gas passes through the proportional valve 26 and the solenoid valve 28a which are set to the maximum opening degree, the fuel gas is supplied in an extra large amount, and in the burner 16,
Combustion occurs with an extra large amount of combustion.

Engineering) When the room temperature controller 32 is set to the rigid running section 32c and the detected indoor temperature is higher than a predetermined temperature (for example, 26°C), the solenoid valve 28a is opened, and at this time the opening degree of the proportional valve 26 is is the maximum opening. Therefore, the fuel gas passes only through the proportional valve 26 which is set to the maximum opening degree, and then passes through the solenoid valve 26.
8a, 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 that the fuel gas passes only through the bypass pipe 27. Therefore, 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 from the suction port 12 is sent to the air mixing chamber 17 to burner! The hot air is mixed with the combustion gas generated by the combustion of No. 6, and is blown out from the hot air outlet 18 as warm air whose air volume is controlled to an appropriate amount, thereby performing a relaxing operation.

As described above, in this embodiment, when the room temperature controller fixes strong heating, the indoor temperature is detected,
When the temperature is higher than the predetermined temperature, combustion is not performed with an extra-large combustion amount, and the heating amount in the heating operation is suppressed to the rated 71-large 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 will be lowered immediately.
- After that, when the indoor temperature rises, it is detected and heating with an extra large amount of heating is stopped.
The amount of heating can be suppressed to the rated maximum. 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 sliding knob 32A shown in FIG.
As shown in FIG. 4, a temperature setting section 32a, a weak fixing section 32b, and a strong running section 32c are provided with the switch 3 for each set temperature.
2d may be provided.

In the above embodiments, a fan heater using a gas burner was used as the heat source, but FF type combustion or other fuels may be used. Further, instead of using gas as a heating source, the heating device may use oil or electricity.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a gas fan heater control device according to an embodiment of the present invention, FIG. 2 is a schematic configuration diagram showing the configuration of a gas fan heater according to the present invention, and FIG. 3 is a block diagram showing a control device for a gas fan heater according to an embodiment of the present invention. 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 (control device of the air conditioner).

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. A control device for a heating machine that determines a heating amount of the heating means according to a temperature difference between a set temperature and a detected temperature detected by the temperature sensing means, the heating for fixing the heating amount of the heating means. A heating amount fixing means is provided, and when the heating amount fixing means is operated in the initial stage of heating start, if the detected temperature is equal to or higher than a 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 when the detected temperature is less than a predetermined temperature, the heating means is controlled to a higher amount than the maximum heating amount. A heating machine control device characterized by controlling an extra-large amount of heating.