JP6633976B2 - Heating system - Google Patents

Description

  The present invention relates to a heating device.

  2. Description of the Related Art In a conventional heating apparatus, an automatic heating operation for selecting an appropriate heating power based on a difference between a room temperature and a set temperature is performed (see Patent Document 1). In such automatic thermal power operation, the minimum thermal power is predetermined based on the stability of combustion of fuel oil and the like.

JP 2009-192190 A

  In the relatively warm season of early spring or autumn, or when the room where the heating device is used is small, etc., even if the minimum heating power is selected, the state where the output of the heating device is larger than the heat radiation of the room continues, Room temperature may continue to rise. In this case, the room is warmed more than necessary, which gives a discomfort to the user in the room.

  As a countermeasure, a method is adopted in which the heating device temporarily extinguishes the fire when the room temperature becomes equal to or higher than a predetermined temperature. However, in such a method, since radiation and warm air disappear during temporary extinguishing, the user may feel cold or the number of operation stops may shorten the life of various components in the heating device.

  The present invention has been made in view of the above points, and has as its object to provide a heating device that can be operated with smaller thermal power.

In order to solve the above-mentioned problem, a heating device of the present invention is a heating device that burns fuel oil in a pot burner, and supplies a fuel supply unit that supplies fuel to the pot burner, and supplies air to the pot burner. An air supply unit, a heater for igniting the pot burner, a room temperature detection unit for detecting room temperature, and the pot burner by controlling the fuel supply unit and the air supply unit based on the room temperature and a set temperature. And a pot burner temperature detection unit that detects a pot burner temperature that is the temperature of the pot burner , wherein the control unit converts the heating power into fuel based on the room temperature and the set temperature . a control for setting the minimum heating power than that determined on the basis of the stability of combustion, the fire of the less than the minimum thermal and said minimum thermal or thermal And a control repeating the bets, in said minimum thermal or thermal and the minimum thermal power less than during execution of the control repeating the firepower, if the pot burner temperature is equal to or less than a predetermined temperature, lower than said minimum thermal In addition to prohibiting operation with thermal power, the minimum thermal power is set such that the smaller the pot burner temperature detected during execution of thermal power equal to or greater than the minimum thermal power, the shorter the duration of the next thermal power below the minimum thermal power. It is characterized in that the duration of the thermal power less than is set .
Further, the heating device of the present invention is a heating device that burns fuel oil in a pot burner, a fuel supply unit that supplies fuel to the pot burner, an air supply unit that supplies air to the pot burner, A heater for igniting the pot burner, a room temperature detecting unit for detecting a room temperature, and a control for changing the heating power in the pot burner by controlling the fuel supply unit and the air supply unit based on the room temperature and the set temperature. And a frame rod for detecting the current of the flame in the pot burner, wherein the control unit sets the thermal power based on the room temperature and the set temperature to a minimum determined based on the stability of fuel combustion. Control to set the heating power or more, and control to repeat the heating power of the minimum heating power or more and the heating power of less than the minimum heating power, During the execution of the control for repeating the power and the heating power less than the minimum heating power, when the current of the flame rod is equal to or less than a predetermined current, or the flame rod voltage, which is a voltage based on the current of the frame rod, is equal to or less than a predetermined voltage. In the case, the operation with the thermal power less than the minimum thermal power is prohibited, and the smaller the current or the flame rod voltage of the flame rod detected during the execution of the thermal power equal to or greater than the minimum thermal power, the less the next minimum thermal power. The duration of the heating power less than the minimum heating power is set so as to shorten the duration of the heating power.

  According to the present invention, the heating device can be operated with smaller thermal power.

It is a figure showing typically the pot type combustor of the heating device concerning an embodiment of the present invention. It is a functional block diagram showing a heating device concerning an embodiment of the present invention. 5 is a graph illustrating an example of a relationship between a difference between a room temperature and a set temperature, and combustion thermal power. It is a graph which shows the 1st example of operation of the heating device concerning an embodiment of the present invention, (a) is a graph which shows a temporal change of room temperature, and (b) is a graph which shows a temporal change of a combustion thermal power. It is a flow chart for explaining the 2nd example of operation of the heating device concerning an embodiment of the present invention. It is a flow chart for explaining the 2nd example of operation of the heating device concerning an embodiment of the present invention. It is a flow chart for explaining the 2nd example of operation of the heating device concerning an embodiment of the present invention.

  An embodiment of the present invention will be described in detail with reference to the drawings. In the following description, the same elements will be denoted by the same reference symbols, without redundant description.

<Heating device>
As shown in FIG. 1, a heating device 1 according to an embodiment of the present invention is a so-called pot burner type, and is an oil stove of cold district specification. The heating device 1 includes a pot-type combustor 2, a combustion cylinder and a heat exchanger (not shown).

  The pot type combustor 2 generates combustion gas by burning fuel oil (for example, kerosene) in a pot burner 11 described later. The combustion tube performs radiant heating by being red-heated by the combustion gas generated in the pot type combustor 2. The heat exchanger exchanges heat between the gas exhausted from the combustion tube and the air in the living room.

<Pot type combustor>
The pot type combustor 2 includes a combustion unit 10, a fuel supply unit 20, an air supply unit 30, and a heater 40.

<Combustion unit>
The combustion unit 10 is a part that becomes a heat source of the heating device 1 by burning fuel oil. The combustion unit 10 includes a pot burner 11, an outer cylinder 12, a vaporizer 13, and a flame regulating cylinder 14.

≪Pot burner≫
The pot burner 11 is a metal member having a cylindrical shape with a bottom (in the present embodiment, a cylindrical shape with a bottom). Fuel oil and air are supplied into the pot burner 11 by the fuel oil supply unit 20 and the air supply unit 30, and the fuel oil supplied into the pot burner 11 burns in the pot burner 11. A plurality of air holes 11 a are formed in the peripheral wall of the pot burner 11.

≪Outer cylinder≫
The outer cylinder 12 is a metal member having a bottomed cylindrical shape (in the present embodiment, a cylindrical shape with a bottom) having a larger diameter and a larger height than the pot burner 11. In the outer cylinder 12, the pot burner 11 is accommodated in a state of floating at a predetermined height. An air chamber 10a is formed between the outer cylinder 12 and the pot burner 11, that is, below the bottom wall of the pot burner 11 and outside the peripheral wall.

≪Vaporized net≫
The vaporizer 13 is a metal member provided at the center of the upper surface of the bottom wall of the pot burner 11. The vaporized net 13 is formed by folding and weaving a heat-resistant stainless steel thin wire. The vaporized net 13 generates a capillary phenomenon for the fuel injected toward the vaporized net 13.

≪Firing flame tube≫
The flame regulating cylinder 14 is a metal member provided at the center in the height direction in the pot burner 14. The flame regulating cylinder 14 has a function of promoting mixing of vaporized gas (vaporized fuel oil) and air.

<Fuel supply section>
The fuel supply unit 20 is a mechanism that supplies fuel into the pot burner 11 of the combustion unit 10. The fuel supply unit 20 includes an oil leveler 21, a supply pipe 22, an injection pipe 23, a protection cylinder 24, a supply pump 25, and a suction pump 26.

≪Oil leveler≫
The oil leveler 21 is a reservoir in which fuel oil supplied to the pot burner 11 of the combustion unit 10 is temporarily stored. Fuel oil is supplied to the oil leveler 21 from a fuel tank (not shown). In the oil leveler 21, the oil level of the fuel oil is kept constant.

≪Supply pipe≫
The supply pipe 22 is a pipe for supplying the fuel oil in the oil leveler 21 to the pot burner 11 of the combustion unit 10.

≪Injection pipe≫
The injection pipe 23 is a pipe having a diameter smaller than that of the supply pipe 22 and attached to a tip portion (end portion on the pot burner 11 side) of the supply pipe 22. The injection pipe 23 is provided so as to be inclined downward toward the pot burner 11. The distal end of the injection pipe 23 is provided in the pot burner 11 so that the fuel oil injected from the distal end is directed to the vaporized net 13. Most of the injection pipe 23 is housed in the protection cylinder 24, and the tip of the injection pipe 23 protrudes from the protection cylinder 24.

≪Protective cylinder≫
The protection cylinder 24 is a cylindrical member for protecting the injection pipe 24. The protection cylinder 24 is provided between the side wall of the outer cylinder 12 and the side wall of the pot burner 11.

≪Supply pump≫
The supply pump 25 is an electromagnetic pump provided in the supply pipe 22. The supply pump 25 pumps up the fuel oil in the oil leveler 21 and supplies the assembled fuel oil into the pot burner 11 via the supply pipe 22 and the injection pipe 23.

≪Suction pump 26≫
The suction pump 26 is an electromagnetic pump provided between the oil leveler 21 and the downstream side of the supply pipe 25 of the supply pipe 22. The suction pump 26 sucks the fuel oil remaining in the supply pipe 22 and the injection pipe 23 when the fire is extinguished, and returns the sucked fuel oil to the oil leveler 21.

<Air supply unit>
The air supply unit 30 is a fan that supplies air into the pot burner through the air chamber 10a and the air holes 11a.

<Heater>
The heater 40 is a rod-shaped ceramic heater protruding upward from the peripheral wall of the pot burner 11 to above the vaporized net 13. The heater 40 has a function of preheating and vaporizing the fuel oil supplied into the pot burner 11 and a function of igniting the vaporized fuel oil.

<Operation unit, various detection units and control unit>
As shown in FIG. 2, the heating device 1 includes an operation unit 50, a room temperature detection unit 61, a pot burner temperature detection unit 62, a frame rod 63, a CO2 concentration detection unit 64, a rotation speed detection unit 65, A control unit 70.

<Operation section>
The operation unit 50 is a switch, a button, a touch panel, or the like operated by a user of the heating device 1. The operation unit 50 is provided on the front or upper surface of the heating device 1. The operation unit 50 includes a driving operation unit 51, a driving mode operation unit 52, a thermal power operation unit 53, and a set temperature operation unit 54.

≪Driving operation unit≫
The operation operation unit 51 is a switch for switching the operation state of the heating device 1 between “ON” and “OFF”. The operation result of the driving operation unit 51 is output to the control unit 70.

≪Operation mode operation unit≫
The operation mode operation unit 52 is a button for switching the operation mode of the heating device 1 between the “thermal power setting operation mode” and the “save operation mode”. The operation result of the operation mode operation unit 52 is output to the control unit 70.

≪Thermal operation unit 53≫
The thermal power operation unit 53 is a button for setting the combustion thermal power of the heating device 1 in the thermal power manual setting operation mode to any one of 1 (minimum thermal power) to 6 (maximum thermal power). Since the heating device 1 according to the present embodiment is a pot burner type designed for cold districts, the combustion power of one lamp, which is the minimum heating power, is larger than that of a normal stove. The operation result of the thermal power operation unit 53 is output to the control unit 70.

≪Set temperature operation section≫
The set temperature operation unit 54 is a button for setting a set temperature of the heating device 1 in the save operation mode. The operation result of the set temperature operation unit 54 is output to the control unit 70.

≪Room temperature detector≫
The room temperature detection unit 61 is a temperature sensor that detects the temperature (room temperature) of the room to be heated in which the heating device 1 is provided. In the present embodiment, the room temperature detecting unit 61 is provided at a portion (for example, the rear surface of the heating device 1) of the heating device 1 that can detect the room temperature without being affected by the pot-type combustor 1 or the like as much as possible. Is a thermistor. The detected room temperature is output to the control unit 70.

≪Pot burner temperature detector≫
The pot burner temperature detector 62 is a temperature sensor that detects the temperature of the pot burner 11. In the present embodiment, the pot burner temperature detector 62 is a thermistor attached to the lower surface of the bottom wall of the pot burner 11, and detects the temperature of the bottom wall of the pot burner 11 (see FIG. 1). When the pot burner temperature is low, the combustion flame in the pot burner 11 may become unstable. The detected pot burner temperature is output to the control unit 70.

≪Frame rod≫
The frame rod 63 is a flame detector that detects a weak current generated in the flame. The frame rod 63 is a rod-shaped member made of metal, and is vertically provided in the pot burner 11 so as to be located in a combustion flame during combustion (see FIG. 1). When the weak current is small (in other words, the flame rod voltage is small), the combustion flame in the pot burner 11 may become unstable. The detected weak current is output to the control unit 70.

≪CO ₂ concentration detector≫
CO ₂ concentration detection unit 64 is a CO ₂ sensor for detecting the CO ₂ concentration in the room heating target heating system 1 is provided. The detected CO ₂ concentration is output to the control unit 70.

≪Rotation speed detector≫
The rotation speed detection unit 65 is a sensor that detects the rotation speed of the air supply unit 30. The detected rotation speed is output to the control unit 70.

<Control unit>
The control unit 70 includes a CPU (Central Processing Unit), a ROM (Read-Only Memory), a RAM (Random Access Memory), an input / output circuit, and the like. Control unit 70, the operation result of the operation unit 50, and, on the basis of the room temperature detector 61, the pot burner the temperature detecting unit 62, the frame rod 63, CO ₂ concentration detector 64 and the detection result of the rotation speed detection unit 65, supply The pump 25, the suction pump 26, the air supply unit 30, and the heater 40 are controlled. The control unit 70 detects a frame rod voltage based on the current output from the frame rod 63 based on the current, and uses the detected frame rod voltage for various controls.

  When the operation operation unit 51 is turned on, the control unit 70 burns the fuel oil in the pot burner 11 by driving the supply pump 25, the air supply unit 30, and the heater 40.

  On the other hand, when the operation operation unit 51 is turned off, the control unit 70 stops the supply pump 25, the air supply unit 30, and the heater 30 to extinguish the combustion of the fuel oil in the pot burner 11. I do. Here, the control unit 70 drives the suction pump 26 for a certain period of time to suck fuel oil remaining in the supply pipe 22 and the injection pipe 23, and returns the sucked fuel oil to the oil leveler 21.

≪ Thermal power manual setting operation mode ≫
Further, in a state in which the driving operation unit 51 is operated to “ON” and the driving mode operation unit 52 is operated to the “manual heating power setting driving mode”, the control unit 70 controls the combustion heat power set by the heating power operation unit 53. , The supply pump 25 and the air supply unit 30 are controlled to match the combustion thermal power in the pot burner 11 with the set fuel thermal power. Further, the control unit 70 performs feedback control of the air supply unit 30 based on the detection result of the rotation speed detection unit 65.

≪Save operation mode≫
Further, in a state where the operation operation unit 51 is operated to “ON” and the operation mode operation unit 54 is operated to the “save operation mode”, the control unit 70 controls the set temperature set by the set temperature operation unit 54 and The supply pump 25 and the air supply unit 30 are controlled based on the room temperature detected by the room temperature detection unit 61, and the combustion power in the pot burner 11 is automatically changed. That is, the control unit 70 sets the target drive amount of the supply pump 25 and the air supply unit 30 based on the set temperature and the room temperature, and controls the supply pump 25 and the air supply unit 30 based on the set target drive amount. I do. This save operation mode is a thermal power automatic setting operation mode. Further, the control unit 70 performs feedback control of the air supply unit 30 based on the detection result of the rotation speed detection unit 65.

  As shown in FIG. 3, in the save operation mode, the control unit 70 controls the supply pump 25 and the air so that the combustion thermal power decreases as the difference between the room temperature and the set temperature ([room temperature] − [set temperature]) increases. The supply unit 30 is controlled.

  In the present embodiment, the control unit 70 controls the combustion heating power in six stages from six lamps (maximum heating power) to one lamp (normal minimum heating power). The stepwise reduction in the combustion power from six to one light is set to the same amount.

When [room temperature]-[set temperature] is less than the first temperature difference threshold value (for example, -3 (° C.)), the control unit 70 sets the combustion thermal power to 6 lights (maximum thermal power). The supply pump 25 and the air supply unit 30 are controlled.
If [room temperature]-[set temperature] is less than a first temperature difference threshold (for example, -3 (° C.) or more) and a second temperature difference threshold (for example, -1 (° C.)), the control unit 70 controls the supply pump 25 and the air supply unit 30 so that the combustion power becomes five lights.
If [room temperature]-[set temperature] is equal to or greater than a second temperature difference threshold (for example, -1 (° C.)) and less than a third temperature difference threshold (for example, less than 0 (° C.)), the control unit 70. Controls the supply pump 25 and the air supply unit 30 so that the combustion power becomes four lights.
When [room temperature]-[set temperature] is equal to or more than a third temperature difference threshold (for example, 0 (° C.)) and less than a fourth temperature difference threshold (for example, 0.5 (° C.)), the control unit is controlled. 70 controls the supply pump 25 and the air supply unit 30 so that the combustion power becomes three lights.
When [room temperature]-[set temperature] is equal to or more than a fourth temperature difference threshold (for example, 0.5 (° C.)) and less than a fifth temperature difference threshold (for example, 1 (° C.)), the control unit is controlled. 70 controls the supply pump 25 and the air supply unit 30 so that the combustion power becomes two lamps.
When [room temperature]-[set temperature] is equal to or more than a fifth temperature difference threshold (for example, 1 (° C.)) and less than a sixth temperature difference threshold (for example, 3 (° C.)), the control unit 70 The supply pump 25 and the air supply unit 30 are controlled so that the combustion power becomes one lamp.
When [room temperature]-[set temperature] is equal to or greater than a sixth temperature difference threshold (for example, 3 (° C.)), the control unit 70 supplies the supply pump so as to temporarily extinguish the fire (the combustion power is zero). 25 and the air supply unit 30 are stopped.

  In the present embodiment, the control unit 70 controls the supply pump 25 and the air supply unit 30 so that the combustion heat becomes a weak light smaller than one light which is the normal minimum heat. The weak lamp is a predetermined ratio (for example, 80%) of one lamp, and is a combustion thermal power that makes combustion of fuel oil unstable when continued for a long time. For this reason, the control unit 70 realizes a smaller combustion heating power by setting the continuous time of the low light operation to a predetermined time (for example, 10 minutes) and repeating the low light and any one of 1 to 6 lights. Such low-light operation cannot be set (prohibited) in the manual heating power setting operation mode in which the combustion power is manually set.

As a modification, when [room temperature]-[set temperature] is equal to or more than a seventh temperature difference threshold (for example, 2 (° C.)) and less than a sixth temperature difference threshold (for example, 3 (° C.)). The controller 70 may be configured to control the supply pump 25 and the air supply unit 30 so that the combustion power repeats one light and one weak light.
In this case, if [room temperature]-[set temperature] is equal to or more than a fifth temperature difference threshold (for example, 1 (° C.)) and less than a seventh temperature difference threshold (for example, less than 2 (° C.)) The control unit 70 controls the supply pump 25 and the air supply unit 30 so that the combustion thermal power becomes one light (does not become a weak light).

<First operation example>
Next, a first operation example of the heating device 1 will be described with reference to FIG. 4 (see FIG. 2 as appropriate). At time t _1, when the user operates the driving operation unit 51 to "ON", the control unit 70 selects the saving driving mode as an initial setting, the supply pump 25 to drive the air supply unit 30 and the heater 40, During the predetermined time, the combustion power is set to three lights (preliminary combustion). Subsequently, at time t ₂ when a predetermined time has elapsed, the control unit 70 starts the combustion. The control unit 70 controls the supply pump 25 and the air supply unit 30 based on the difference between the set temperature and the room temperature. During the combustion room temperature rises at time t ₃ reaches the set temperature.

Subsequently, the room temperature is further increased, one lamp and satisfies the condition at time t _4, the control unit 70, one light for a predetermined time (e.g. 10 minutes) → weak light for a predetermined time (e.g. 10 minutes) → ... that Thus, the supply pump 25 and the air supply unit 30 are controlled so that one lamp and a weak lamp are alternately repeated.

Subsequently, at time _{t 5,} when the room temperature reaches to the set temperature] +3 (° C.), the control unit 70, feed pump 25, the air supply unit 30 and the heater 40 is stopped, temporarily extinguishing.

During transient extinguishing, room temperature is lowered, followed by the drop below the set temperature] at time t _13, the control unit 70 drives the supply pump 25, the air supply unit 30 and the heater 40 resumes the combustion . After resumption of the combustion, and room temperature satisfies the condition of one light at a time t _14, the control unit 70 controls the supply pump 25 and the air supply unit 30 to repeat alternately the single-lamp and Yowato.

Subsequently, at time _{t 15,} when the room temperature reaches to the set temperature] +3 (° C.), the control unit 70, feed pump 25, the air supply unit 30 and the heater 40 is stopped, temporarily extinguishing. Thus, the control unit 70 repeats the main combustion and the temporary fire extinguishing.

Since the heating apparatus 1 according to the embodiment of the present invention has control of repeating any one of 1 to 6 lights (one in this operation example) and a weak light, it is possible to operate with a smaller combustion thermal power. .
Moreover, since the heating device 1 can extend the time until the fire is temporarily extinguished by the low-light operation, it is possible to suppress the user from feeling cold.
In addition, since the heating device 1 can extend the time until the temporary extinguishing is achieved by the low-light operation, the number of times of temporary extinguishing in the entire operation can be reduced, and the life of the components can be extended.

<Low light prohibition control>
Next, the prohibition control of the weak light in the heating device 1 will be described. Since the low light is unstable as described above, the control unit 70 prohibits the low light when at least one of the following low light prohibition conditions is satisfied.

1. The pot burner temperature is equal to or lower than a predetermined temperature (for example, 220 (° C.)). The pot burner temperature during the main combustion is usually about 300 ° C. The pot burner temperature gradually decreases when the low light operation is repeated. Therefore, when the pot burner temperature becomes equal to or lower than the predetermined temperature (220 (° C.)), the combustion in the weak light tends to be unstable, and the control unit 70 prohibits the subsequent weak light.

  Further, the control unit 70 may be configured to prohibit the subsequent low light when the pot burner temperature becomes equal to or lower than the predetermined temperature for a predetermined number of times (one time or more, for example, three times). Here, during execution of the repetitive operation of one lamp and a weak lamp, the control unit 70 sets a pot burner at each switching timing from the weak lamp to the one lamp (the end point of the weak lamp, that is, the start point of one lamp). It is determined whether the temperature is equal to or lower than a predetermined temperature. Then, when the pot burner temperature continues to be equal to or lower than the predetermined temperature for a predetermined number of times (one time or more, for example, three times), the control unit 70 prohibits the subsequent low light.

2. Flame rod voltage is not more than a predetermined voltage (for example, 3 (V)). Flame rod voltage during the main combustion is usually about 4 (V). The flame rod voltage gradually decreases when the low light operation is repeated. Therefore, when the flame rod voltage becomes 3 (V) or less, the combustion in the weak light tends to be unstable, and the control unit 70 prohibits the subsequent weak light.

  Further, the control unit 70 may be configured to prohibit the subsequent weak lighting when the flame rod voltage becomes equal to or lower than the predetermined voltage for a predetermined number of times (one time or more, for example, three times). Here, during execution of the repetitive operation of one lamp and the weak lamp, the control unit 70 sets the frame rod at each switching timing from the weak lamp to the one lamp (the end point of the weak lamp, that is, the start point of one lamp). It is determined whether the voltage is equal to or lower than a predetermined voltage. The control unit 70 prohibits the subsequent low light when the flame rod voltage becomes equal to or lower than the predetermined voltage for a predetermined number of times (one time or more, for example, three times).

  Note that the control unit 70 may be configured to prohibit the subsequent low light when the current of the frame rod 63 becomes equal to or less than the predetermined current. Further, the control unit 70 may be configured to prohibit the subsequent weak lighting when the current of the frame rod 63 becomes equal to or less than the predetermined current for a predetermined number of times (one time or more, for example, three times). Here, during execution of the repetitive operation of one lamp and the weak lamp, the control unit 70 sets the frame rod at each switching timing from the weak lamp to the one lamp (the end point of the weak lamp, that is, the start point of one lamp). It is determined whether the current of 63 is equal to or less than a predetermined current. Then, when the current of the frame rod 63 becomes equal to or less than the predetermined current for a predetermined number of times (one time or more, for example, three times), the control unit 70 prohibits the subsequent low light.

3. The CO ₂ concentration is equal to or higher than a predetermined concentration (for example, 0.5 (%)). The CO ₂ concentration of air is usually about 0.04 (%). When the CO ₂ concentration becomes 0.5 (%) or more, since the combustion in the weak light tends to be unstable, the control unit 70 prohibits the subsequent weak light. In addition, when the CO ₂ concentration becomes 1.5 (%) or more, the control unit 70 stops the supply pump 25, the air supply unit 30, and the heater 40, and stops the operation of the heating device 1.

  Note that the control unit 70 may be configured to prohibit low light when two or all three of the above-described low light prohibition conditions are satisfied.

<Second operation example>
Next, a second operation example of the heating device 1 will be described with reference to FIGS. The second operation example is a combination of the first operation example and low-light prohibition control. As an initial condition of the second operation example, the low-light operation is not prohibited.

  As shown in FIG. 5, when the user operates the operation operation unit 51 to “ON”, the control unit 70 selects the save operation mode as an initial setting, and drives the supply pump 25, the air supply unit 30, and the heater 40. Then, the combustion power is set to three for a predetermined time (preliminary combustion, step S1). Subsequently, when a predetermined time has elapsed, the control unit 70 starts the main combustion (step S2).

Here, when a state of the driving operation unit 51 is "ON" (No in step S3), and and, CO ₂ concentration detected by the CO ₂ concentration detector 64 is 0.5 (%) or more (step In Yes in S4), the control unit 70 prohibits the low-light operation (Step S5).

When the CO ₂ concentration is less than 0.5 (%) (No in step S4) and after execution of step S5, the control unit 70 sets the set temperature and room temperature detected by the set temperature operation unit 54. The combustion heating power is selected based on the room temperature detected by 61 (step S6).

  When any one of 2 to 6 lamps is selected in step S6, the control unit 70 sets the drive frequency of the supply pump 25 and the rotation speed of the air supply unit 30 according to the selected heating power ( Step S7).

  In the case where one lamp is selected in step S6, as shown in FIG. 6, when the immediately preceding operation is not the weak lamp operation (No in step S8), the control unit 70 performs the one lamp operation. Then, the drive frequency of the supply pump 25 and the rotation speed of the air supply unit 30 are set (step S9).

  Subsequently, if the continuous time of the single-light operation is less than 10 minutes (No in Step S10), the flow returns to Step S3.

  On the other hand, when the one-light operation has elapsed for 10 minutes (Yes in step S10) and the low-light operation is prohibited (Yes in step S11), the flow returns to step S3.

  In addition, when the one-light operation has elapsed for 10 minutes (Yes in step S10) and the low-light operation is not prohibited (No in step S11), the control unit 70 performs the low-light operation, The drive frequency of the supply pump 25 and the rotation speed of the air supply unit 30 are set (step S12).

  On the other hand, when one lamp is selected in step S6 and the last operation is the low lamp operation (Yes in step S8), the control unit 70 controls the supply pump 25 to perform the low lamp operation. The drive frequency and the rotation speed of the air supply unit 30 are set (step S13).

  Subsequently, when the continuous time of the low light operation is less than 10 minutes (No in Step S14), the flow returns to Step S3.

  On the other hand, if the low-light operation has elapsed for 10 minutes, the control unit 70 sets the drive frequency of the supply pump 25 and the rotation speed of the air supply unit 30 so as to perform the single-light operation (step S15).

  After the execution of step S15, as shown in FIG. 7, when the pot burner temperature detected by the pot burner temperature detecting unit 62 is lower than 220 (° C.) three consecutive times (Yes in step S16, In Yes at S17, the control unit 70 prohibits the low-light operation (Step S20).

  In addition, after execution of step S15, when the pot burner temperature is higher than 220 (° C.) (No in step S16), and the number of consecutive times that the pot burner temperature is 220 (° C.) or less is less than three times. In the case (Yes in step S16 and No in step S17), if the flame rod voltage is 3 (V) or less for three consecutive times (Yes in step S18 and Yes in step S19), The control unit 70 prohibits the low-light operation (step S20).

  On the other hand, when the frame rod voltage is higher than 3 (V) (No in step S18), and when the number of consecutive times that the frame rod voltage is higher than 3 (V) is less than 3 (Yes in step S18). And (No in step S19), the flow returns to step S3. Similarly, after the execution of step S20, the flow returns to step S3.

  On the other hand, as shown in FIG. 5, when the temporary extinguishing is selected in step S6, the control unit 70 stops the supply pump 25 and sets the rotation speed of the air supply unit 30 to the cooling rotation speed. (Step S21). The control unit 70 stops the heater 40 and stops the air supply unit 30 set at the cooling rotation speed after 10 minutes continuous.

  When step S6 is executed in a state where the temporary fire extinguishing is selected, the control unit 70 supplies the fuel so as to re-ignite when [room temperature]-[set temperature] becomes 0 (° C.) or less. The pump 25, the air supply unit 30, and the heater 40 are controlled.

  In addition, when the user operates the driving operation unit 51 to “OFF” (Yes in step S3), the control unit 70 cancels the low-light driving prohibition (step S22). In other words, when the low-light operation is once prohibited, the prohibition setting is continued until the heating device 1 stops (until the operation operation unit 51 is turned off). Subsequently, the control unit 70 stops the supply pump 25 and sets the rotation speed of the air supply unit 30 to the rotation speed for cooling (step S23). The control unit 70 stops the heater 40 and stops the air supply unit 30 set at the cooling rotation speed after 10 minutes continuous.

  In the second operation example, the low-light operation prohibition determination in steps S16 to S20 is performed after the execution of step S15, that is, in the second and subsequent single-light operations in which the single-light operation and the low-light operation are performed once each. You. When the low-light operation is prohibited, the control unit 70 does not perform the low-light operation even if the single-light operation is selected thereafter.

  Since the heating device 1 according to the embodiment of the present invention prohibits the low-light operation based on the predetermined condition, the low-light operation can be prohibited when the combustion thermal power is unstable, and the stable operation can be performed. .

<Low light operation time change control>
Next, the change control of the low lamp operation time will be described with reference to FIG.

  During the execution of the control for repeating the one-light operation and the low-light operation, the control unit 70 sets the following as the pot burner temperature detected during the execution of the one-light operation (for example, at the end of the one-light operation) becomes smaller. The duration of the low light operation is set so that the duration of the low light operation becomes short. Such control is performed within a range where the pot burner temperature is larger than the above-described temperature threshold. Further, the maximum value of the duration of the weak throw operation can be, for example, the above-described 10 minutes.

  Further, during the execution of the control of repeating the one-light operation and the low-light operation, the control unit 70 determines that the smaller the flame rod voltage detected during the execution of the one-light operation (for example, at the end of the one-light operation), The duration of the low-light operation is set so that the duration of the next low-light operation becomes short. Such control is performed within a range where the flame rod voltage is larger than the above-described voltage threshold. Further, the maximum value of the duration of the weak throw operation can be, for example, 10 minutes as described above.

  The heating device 1 according to the embodiment of the present invention can perform a stable operation because the duration of the low-light operation is shortened when the combustion thermal power is unstable.

  As described above, the embodiments of the present invention have been described, but the present invention is not limited to the above embodiments, and can be appropriately changed without departing from the gist of the present invention. For example, in the second operation example, steps S16 to S20 may be executed between step S9 and step S10, between step S12 and step S3, or between step S13 and step S14. That is, the control unit 70 compares the pot burner temperature, the current of the flame rod 63, and the flame rod voltage for the weak light operation prohibition determination with the respective predetermined values with one light (or two to six light operation). It can be executed at any timing during the execution of the repeated operation with the weak light.

  In the example illustrated in FIG. 3, when [room temperature] − [set temperature] corresponds to one light, the control unit 70 immediately repeats one light and a weak light immediately. Is not limited to this. For example, when [room temperature]-[set temperature] corresponds to one lamp, the control unit 70 performs one-light operation, and when room temperature rises during execution of one-light operation, one light and weak light May be repeated. In this case, the control unit 70 may be configured to return to the single-light operation when the room temperature becomes constant or drops, without shifting to the above-described temporary fire extinguishing.

1 Heating 11 pot burner 25 supply pump 30 air supply 40 the heater 61 at room temperature detector 62 pot burner temperature detecting unit 63 frame rod 64 CO ₂ concentration detector 70 control unit

Claims (5)

A heating device that burns fuel oil in a pot burner,
A fuel supply unit for supplying fuel to the pot burner;
An air supply unit that supplies air to the pot burner,
A heater for igniting the pot burner;
A room temperature detector for detecting room temperature,
A control unit that changes the thermal power in the pot burner by controlling the fuel supply unit and the air supply unit based on the room temperature and the set temperature;
A pot burner temperature detector that detects a pot burner temperature that is the temperature of the pot burner,
With
The control unit includes:
Control to set the thermal power based on the room temperature and the set temperature to a minimum thermal power or more determined based on the stability of combustion of fuel oil ,
Control to repeat the heating power of the minimum heating power or more and the heating power of less than the minimum heating power,
Has,
During the execution of the control for repeating the heating power of the minimum heating power or more and the heating power of less than the minimum heating power, when the pot burner temperature becomes equal to or lower than a predetermined temperature, the operation with the heating power less than the minimum heating power is prohibited, and Setting the duration of the heating power less than the minimum heating power such that the smaller the pot burner temperature detected during the execution of the heating power of the minimum heating power or more, the shorter the duration of the next heating power less than the minimum heating power. A heating device characterized by the above-mentioned. A flame rod for detecting the current of the flame in the pot burner,
The control unit, during the execution of the control to repeat the heating power of the minimum heating power or more and the heating power of less than the minimum heating power, when the current of the frame rod is less than or equal to a predetermined current, or by the voltage of the current of the frame rod The heating device according to claim 1 , wherein when a certain frame rod voltage is equal to or lower than a predetermined voltage, operation with a thermal power less than the minimum thermal power is prohibited. The control unit, during execution of control to repeat the heating power of the minimum heating power or more and the heating power of less than the minimum heating power, the current of the flame rod or the flame rod voltage detected during the execution of the heating power of the minimum heating power or more The heating device according to claim 2 , wherein the duration of the heating power less than the minimum heating power is set such that the duration of the next heating power less than the minimum heating power becomes shorter as the value of the heating power becomes smaller. A heating device that burns fuel oil in a pot burner,
A fuel supply unit for supplying fuel to the pot burner;
An air supply unit that supplies air to the pot burner,
A heater for igniting the pot burner;
A room temperature detector for detecting room temperature,
A control unit that changes the thermal power in the pot burner by controlling the fuel supply unit and the air supply unit based on the room temperature and the set temperature;
A frame rod for detecting the current of the flame in the pot burner;
With
The control unit includes:
Control to set the thermal power based on the room temperature and the set temperature to a minimum thermal power or more determined based on the stability of combustion of fuel oil ,
Control to repeat the heating power of the minimum heating power or more and the heating power of less than the minimum heating power,
Has,
During the execution of the control for repeating the heating power of the minimum heating power or more and the heating power of less than the minimum heating power, when the current of the flame rod is equal to or less than a predetermined current, or the flame rod voltage which is a voltage due to the current of the flame rod is generated. When the voltage is equal to or less than the predetermined voltage, the operation with the thermal power less than the minimum thermal power is prohibited, and the smaller the current of the flame rod or the voltage of the flame rod detected during the execution of the thermal power that is equal to or greater than the minimum thermal power, the following: The duration of the heating power less than the minimum heating power is set such that the duration of the heating power less than the minimum heating power becomes short . A CO ₂ concentration detection unit that detects the CO ₂ concentration in the room is provided,
Wherein, when the CO ₂ concentration is predetermined concentration or more, according to any one of claims 1 to 4, characterized in that prohibiting operation in thermal power less than said minimum thermal Heating system.

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