JP6366385B2 - Hot air heater - Google Patents

Description

  The present invention relates to a warm air heating device that raises the temperature of air by mixing air sucked into a casing from a suction port with combustion exhaust gas of a combustor and blows out the heated air from a blower outlet.

  Hot air heating devices such as gas fan heaters and oil fan heaters are a hot air circulation type that mixes the sucked indoor air with the combustion exhaust gas of the combustor and blows it back into the room again, with a large heating capacity, It is the most suitable heating equipment for heating the whole room. The operation mode of the warm air heater includes an operation mode performed based on a set target temperature instructed by the user, an operation mode performed based on a set fuel amount (combustion amount) instructed by the user, and the like.

  The former operation mode determines the target fuel supply amount to be supplied to the combustor based on the temperature difference between the measured room air temperature and the set target temperature so that the air temperature in the room becomes the set target temperature. In this operation mode, the target fuel supply amount is supplied to the combustor. That is, this operation mode is used, for example, when the temperature of the air in the entire room is warmed to the set target temperature. In this case, the comfort of the room is ensured, but the amount of fuel supplied to the combustor is automatically adjusted based on the temperature difference between the air temperature of the room and the set target temperature, so it is difficult to predict the running cost. The amount of fuel supplied to the combustor may increase and the running cost may increase.

  The latter operation mode is an operation mode in which a constant set amount of fuel is continuously supplied to the combustor for combustion. That is, this operation mode is used, for example, when a user who is close to the hot air heater warms up by hitting the hot air blown from the hot air heater. In this case, since the amount of fuel supplied to the combustor is maintained at a constant value, the running cost can be predicted relatively accurately. That is, the user may set the amount of fuel supplied to the combustor to be very small if the running cost is to be very low.

  The warm air heating device described in Patent Literature 1 includes an automatic combustion amount control unit and a manual combustion amount control unit. The automatic combustion amount control unit is configured to execute the former operation mode described above (for example, automatically determine the combustion amount according to room temperature and a preset target temperature set in advance). The manual combustion amount control unit is configured to execute the latter operation mode described above (for example, to adjust the combustion amount in three stages of strong combustion, medium combustion, and weak combustion), that is, supply to the combustor. The amount of fuel to be produced is configured to be adjusted in three stages. Then, when the user pushes the manual switch, the manual combustion control of strong combustion, medium combustion, weak combustion, and automatic combustion amount control are sequentially switched.

JP-A-3-007810

  In the hot air heating apparatus as described in Patent Document 1, when the automatic combustion amount control is performed, the amount of fuel burned in the combustor is automatically adjusted to control the temperature of the room, When manual combustion control is performed, the amount of fuel combusted in the combustor is maintained at a constant value, and thus the temperature of the room is not controlled. Therefore, the room temperature gradually rises even if the amount of fuel supplied to the combustor remains constant, depending on the size of the room, the outside air entering and exiting the room (people entering and leaving the room), the outside air temperature, etc. Sometimes. That is, the air in the entire room is heated more than necessary. In such a case, there arises a problem that the running cost becomes higher than necessary.

  This invention is made | formed in view of said subject, The objective is to provide the warm air heating apparatus which can avoid that a running cost becomes high more than necessary.

In order to achieve the above object, the hot air heating apparatus according to the present invention is characterized in that a combustor that burns fuel in a housing having a suction port for sucking air and a blower port for blowing air, and the combustor A fuel amount adjusting means for adjusting a fuel amount to be supplied to the air, and air is sucked into the housing through the suction port and air is blown out from the housing through the outlet. Air flow means for flowing, and control means for controlling the operation of each means, and the temperature of the air is raised by mixing the air sucked into the housing from the suction port with the combustion exhaust gas of the combustor. A warm air heater that blows out the heated air from the outlet,
Suction air temperature measuring means for measuring the temperature of air sucked into the housing from the suction port;
Driving instruction receiving means for receiving driving instructions from the user,
The operation instruction accepting unit accepts a setting target temperature setting instruction used for operation in the first heating operation mode from a user, and a minimum supply fuel amount and a maximum supply fuel amount adjusted by the fuel amount adjustment unit, An instruction to set information that can specify the set fuel amount used for the operation in the second heating operation mode is received from the entire supply fuel amount range during
The control means includes
When the operation instruction accepting unit accepts an operation execution instruction in the first heating operation mode, the temperature of the air measured by the intake air temperature measuring unit is the set target temperature received by the operation instruction accepting unit Based on the temperature difference between the air temperature measured by the intake air temperature measuring means and the set target temperature, a target supply fuel amount to be supplied to the combustor is determined from the total supply fuel amount range. The target supply fuel amount is supplied to the combustor by the fuel amount adjusting means, and
When the operation instruction receiving means receives an operation execution instruction in the second heating operation mode, a constant fuel amount is continuously supplied to the combustor by the fuel amount adjusting means and burned. When the operation is performed and an overheating condition indicating that excessive heating is performed is satisfied, an overheating avoidance process including reducing the amount of fuel supplied to the combustor is performed,
When starting the operation in the second heating operation mode, the set fuel amount in the second heating operation mode received by the operation instruction receiving means is supplied to the combustor in the constant fuel amount operation. Fuel amount ,
Each time the operation instruction receiving means is pushed by the user, the operation instruction receiving means is used for a plurality of set values as the set target temperature used for the operation in the first heating operation mode and the operation in the second heating operation mode. A set value changeover switch in which any one set value of a set value group including a plurality of set values as information capable of specifying the set fuel amount to be used is sequentially changed;
The control means includes
When the set value as the set target temperature is set by the set value changeover switch, it is determined that the operation instruction receiving means has received an operation execution instruction in the first heating operation mode, and the set value When the set value as information that can specify the set fuel amount is set by the changeover switch, it is determined that the operation instruction reception unit has received an operation execution instruction in the second heating operation mode;
Distinguishing between a long press operation when the user presses the set value changeover switch for a set time or longer and a normal press operation when the user presses the set value changeover switch for less than the set time. Judgment,
In the plurality of set values as the set target temperature in the first heating operation mode, a change order is set when the set value changeover switch is sequentially changed every time the set value changeover switch is normally pressed, and There is one first boundary set value among a plurality of set values as the set target temperature,
The plurality of set values as information that can specify the set fuel amount in the second heating operation mode has a change order when the set value changeover switch is sequentially changed every time the set value changeover switch is normally pressed. And there is one second boundary set value among a plurality of set values as information capable of specifying the set fuel amount,
In a state where any one of the set target temperatures in the first heating operation mode is set, when the user performs a long press operation on the set value changeover switch, the second heating operation mode Change the setting fuel amount to a specific setting value among a plurality of setting values as identifiable information,
The long press operation on the set value changeover switch by the user in a state where any set value among a plurality of set values as information capable of specifying the set fuel amount in the second heating operation mode is set Is performed, the setting is changed to a specific set value in the set target temperature of the first heating operation mode,
Each time the normal push operation is performed on the set value changeover switch, the setting is sequentially changed from one set value as the set target temperature to another set value as the set target temperature, and the set target temperature is set as the set target temperature. When the normal pressing operation is performed on the set value changeover switch after changing the setting from one set value to the set value that is the first boundary set value, the setting is changed to the set value that is the second boundary set value. And
Each time the normal push operation is performed on the set value changeover switch, the set fuel amount is sequentially set from one set value as information that can specify the set fuel amount to another set value as information that can specify the set fuel amount. The normal push operation is performed on the set value changeover switch after the setting value is changed from one set value as information that can specify the set fuel amount to the set value that is the second boundary set value. The setting is changed to the setting value which is the first boundary setting value .

  According to the above characteristic configuration, when the operation instruction accepting unit accepts an operation execution instruction in the first heating operation mode, the control unit performs a temperature of air sucked into the housing from the suction port (for example, a hot air heating device) The amount of fuel supplied to the combustor is adjusted such that the temperature of the indoor air in which the is installed is equal to the set target temperature received from the user. As a result, the temperature in the room where the hot air heater is installed approaches a comfortable state for the user.

  The user does not place much importance on the comfort that the temperature of the air in the entire room is adjusted to a desired temperature, for example, and the user himself / herself is heated to a certain level of hot air blown from the hot air heater. In some cases, you may feel warmth by hitting. In such a case, when the operation in the first heating operation mode (that is, the operation in which the temperature of the air sucked into the casing from the suction port is set to the set target temperature) is performed, the fuel supplied to the combustor during that time Since the amount is automatically changed, there is a possibility that the amount of fuel supplied to the combustor becomes relatively large and the running cost increases. In other words, in the first heating operation mode, heating is performed while running a running cost more than necessary for the user.

However, in this feature configuration, the control means continuously supplies a constant amount of fuel to the combustor by the fuel amount adjusting means when the operation instruction accepting means accepts the operation execution instruction in the second heating operation mode. The fixed fuel amount operation for burning is performed, and the constant fuel amount when starting the constant fuel amount operation is a value (set fuel amount) received from the user. In other words, the constant amount of fuel that is supplied to the combustor and burned is not the value that is automatically adjusted by the hot air heating device, but the value that is received from the user (the set fuel amount). It is avoided that it is performed while running a running cost more than necessary for the user.
Furthermore, the control means performs an excessive heating avoidance process including reducing the amount of fuel supplied to the combustor when an excessive heating condition indicating that excessive heating is performed is satisfied. In other words, excessive heating means that the amount of fuel supplied to the combustor and burned is excessive, and therefore includes reducing the amount of fuel supplied to the combustor. By performing the excessive heating avoidance process, it is possible to achieve both suppression of excessive heating and further reduction in running cost.
Therefore, it is possible to provide a warm air heater that can avoid an increase in running cost more than necessary.
Furthermore, according to the above characteristic configuration, each time the user pushes the set value changeover switch, a plurality of set values as set target temperatures used for the operation in the first heating operation mode and the second heating operation mode. Any one set value of a set value group including a plurality of set values as information capable of specifying the set fuel amount used for the operation is sequentially changed. That is, since the setting value for the first heating operation mode and the setting value for the second heating operation mode can be set using one setting value changeover switch, the setting value for the first heating operation mode and the second heating operation mode are set. A switch for setting the setting value for the mode may not be separately installed in the hot air heater.
In addition, the control means determines that the operation in the first heating operation mode is instructed when the setting value for the first heating operation mode is set by the setting value changeover switch, and the setting value changeover switch When the setting value for the second heating operation mode is set, it is determined that the operation in the second heating operation mode is instructed, so that the user instructs the operation in the first heating operation mode. The switch and the switch for instructing the operation in the second heating operation mode may not be separately installed in the hot air heater.
Further, according to the above characteristic configuration, the control means distinguishes and determines the long press operation and the normal press operation on the set value changeover switch by the user.
The plurality of set values as the set target temperatures in the first heating operation mode are determined in order of change when the set value changeover switch is sequentially changed each time the set value changeover switch is normally pressed. A plurality of set values as information capable of specifying the set fuel amount in the operation mode has a change order when the setting is sequentially changed every time the set value changeover switch is normally pressed. As a result, the user can sequentially change the setting values of the plurality of set values as the set target temperatures in the first heating operation mode according to the change order by performing a normal pressing operation on the set value changeover switch. Similarly, the user performs setting changes of a plurality of set values as information that can specify the set fuel amount in the second heating operation mode in order according to the change order by performing a normal pressing operation on the set value changeover switch. be able to.
In addition, when the normal pressing operation is performed on the set value changeover switch after the setting change from one set value as the set target temperature of the first heating operation mode to the set value that is the first boundary set value, The setting is changed from the setting value (first boundary setting value) in the first heating operation mode to the setting value (second boundary setting value) in the second heating operation mode. On the other hand, the normal push operation to the set value changeover switch after the setting change from the one set value as information that can specify the set fuel amount in the second heating operation mode to the set value that is the second boundary set value Is performed, the setting is changed from the setting value (second boundary setting value) of the second heating operation mode to the setting value (first boundary setting value) of the first heating operation mode. That is, the user performs a normal pressing operation on the set value changeover switch to change from the state in which the set value of the first heating operation mode is set to the state in which the set value of the second heating operation mode is set. The setting change and the setting change from the state where the setting value of the first heating operation mode is set to the state where the setting value of the second heating operation mode is set can be performed.
When the user performs a normal pressing operation, the setting is made between the state where the set value of the first heating operation mode is set and the state where the set value of the second heating operation mode is set. The change is performed via the first boundary set value among the plurality of set values in the first heating operation mode and the second boundary set value among the plurality of set values in the second heating operation mode. That is, if the user does not normally press the set value changeover switch many times, the setting value of the first heating operation mode and the setting value of the second heating operation mode are set. Cannot change settings between
However, in this feature configuration, when the control unit performs a long press operation on the set value changeover switch by the user in a state where any set value in the set target temperature of the first heating operation mode is set, The setting fuel amount in the second heating operation mode is changed to a specific setting value among a plurality of setting values as information that can be specified, and a plurality of information as information that can specify the setting fuel amount in the second heating operation mode If a long press operation is performed on the set value changeover switch by the user while any set value is set, the specific set value in the set target temperature of the first heating operation mode is set. Change settings. That is, the user performs a single long pressing operation on the set value changeover switch between a state where the set value of the first heating operation mode is set and a state where the set value of the second heating operation mode is set. Can be changed.

  Another characteristic configuration of the hot air heating device according to the present invention is that the control unit determines that the overheating condition is satisfied when the temperature of the air measured by the intake air temperature measurement unit is equal to or higher than a predetermined determination temperature. There is in point to do.

  According to the above characteristic configuration, when the temperature of the air measured by the intake air temperature measuring means (for example, the temperature of the indoor air in which the hot air heater is installed) becomes equal to or higher than a predetermined determination temperature, the control means The overheating avoidance process is performed by determining that the overheating condition indicating that the heating is being performed is satisfied. That is, based on the temperature of the air measured by the intake air temperature measuring means, it is determined whether or not excessive heating is being performed, and if excessive heating is being performed, the excessive heating avoidance process is performed. Thus, it is possible to achieve a combination of suppression of excessive heating and further reduction in running cost.

  According to still another feature of the hot air heating apparatus according to the present invention, the control means is configured to increase the excess when a period in which the temperature of the air measured by the intake air temperature measuring means is equal to or higher than a predetermined determination temperature continues for a predetermined period. It is in the point which determines with heating conditions having been satisfy | filled.

  According to the above characteristic configuration, the control means has a period in which the temperature of the air measured by the intake air temperature measurement means (for example, the temperature of the indoor air in which the hot air heating device is installed) is equal to or higher than a predetermined determination temperature. If it continues for a predetermined period, it will determine with the excessive heating conditions which show that excessive heating is performed being satisfied, and the said excessive heating avoidance process will be performed. That is, based on the temperature of the air measured by the intake air temperature measuring means and the length of the period during which the temperature of the air is equal to or higher than a predetermined discrimination temperature, it is determined whether or not excessive heating is performed. When the heating is being performed, the excessive heating avoidance process is performed, so that it is possible to achieve both the suppression of the excessive heating and the further reduction of the running cost.

  Still another characteristic configuration of the hot air heating device according to the present invention is that the overheating avoidance process is a fuel amount reduction process for reducing the amount of fuel supplied to the combustor by a predetermined amount when the overheating condition is satisfied. This is a process of continuing the constant fuel amount operation after performing the above.

  According to the above characteristic configuration, the control means reduces the amount of fuel supplied to the combustor by a predetermined amount as an excessive heating avoidance process when an excessive heating condition indicating that excessive heating is performed is satisfied. Continue the constant fuel amount operation after performing the amount reduction process. In other words, the fact that excessive heating is being performed indicates that the amount of fuel supplied to the combustor and being combusted is excessive. It is possible to achieve both suppression and further reduction in running cost.

  Still another characteristic configuration of the hot air heating device according to the present invention is that when the overheating condition is satisfied in a state where the amount of fuel supplied to the combustor is the minimum amount of supplied fuel, The fuel supply to the combustor is stopped to stop the combustion in the combustor.

When the constant fuel amount operation is performed in the second heating operation mode, no further fuel amount reduction process can be performed in a state where the fuel amount supplied to the combustor is the minimum fuel supply amount.
Therefore, in this feature configuration, when the control unit is performing the constant fuel amount operation in the second heating operation mode, if the excessive heating condition is satisfied in a state where the fuel amount supplied to the combustor is the minimum fuel supply amount, As the overheating avoidance process, the fuel supply to the combustor is stopped to stop the combustion in the combustor.

  Still another characteristic configuration of the hot air heating apparatus according to the present invention is that the overheating avoiding process stops the supply of fuel to the combustor and performs combustion in the combustor when the overheating condition is satisfied. This is in the process of stopping the process.

  According to the above characteristic configuration, when the overheating condition indicating that excessive heating is performed is satisfied, the control unit stops the supply of fuel to the combustor as an overheating avoidance process. Stop burning. In other words, excessive heating means that the amount of fuel that is supplied to the combustor and burned is excessive, so the fuel supply to the combustor is stopped and the combustor is stopped. By stopping the combustion at, it is possible to achieve both suppression of excessive heating and further reduction in running cost.

It is a schematic block diagram of the warm air heating apparatus of 1st Embodiment. It is a figure which shows the structural example of the driving operation reception part of 1st Embodiment. It is a figure which shows the example of a transition of the setting value of the normal mode displayed on the setting room temperature display part of 1st Embodiment. It is a figure which shows the example of a transition of the setting value of the manual mode displayed on the setting room temperature display part of 1st Embodiment. It is a functional block diagram of the warm air heating device of a 1st embodiment. It is a flowchart explaining the heating operation of 1st Embodiment. It is a figure which shows the structural example of the driving operation reception part of 2nd Embodiment. It is a figure which shows the example of a transition of the setting value of the normal mode and manual mode which are displayed on the setting room temperature display part of 2nd Embodiment. It is a flowchart explaining the heating operation of 4th Embodiment.

<First Embodiment>
The hot air heating device 100 of the first embodiment will be described below with reference to the drawings. The hot air heating device 100 of the present embodiment includes a normal mode (corresponding to the “first heating operation mode” of the present invention) in which operation is performed according to a set target temperature specified by the user, and a combustor specified by the user. The operation is switched to the manual mode (corresponding to the “second heating operation mode” of the present invention) in which the operation is performed in accordance with the amount of fuel supplied to 20. That is, as described below, by operating the hot air heating device 100 in the normal mode, the temperature of the air in the entire room where the hot air heating device 100 is installed while the heating output is automatically changed as appropriate. Can be set to a predetermined set target temperature. Further, by operating the hot air heating device 100 in the manual mode, the fuel amount burned by the combustor 20 of the hot air heating device 100 is maintained at a constant fuel amount designated by the user (that is, the heating output). Can be performed locally (for example, heating in a range where the hot air blown directly hits).

  Drawing 1 is a schematic structure figure of the warm air heating device of a 1st embodiment. Specifically, FIG. 1A is a front perspective view showing an arrangement state of main components of the hot air heating device 100, and FIG. 1B is a cross-sectional view of the hot air heating device 100 as viewed from the side. FIG. As shown in the drawing, the hot air heating apparatus 100 includes a combustor 20 that burns fuel in a housing 10 that has a suction port 70 that sucks air and a blowout port 72 that blows out air, and fuel that is supplied to the combustor 20. The air flows in such a manner that the fuel amount adjusting means F for adjusting the amount of air, the intake of air into the housing 10 through the suction port 70, and the blowing of air from the inside of the housing 10 through the air outlet 72. A convection fan 40 (an example of the “air flow means” of the present invention) and a control means 80 for controlling the operation, and the air sucked into the housing 10 from the suction port 70 and the combustion exhaust gas of the combustor 20. It is an apparatus configured to raise the temperature of the air by mixing and to blow out the heated air from the outlet 72. In addition, the hot air heating device 100 includes a driving operation receiving unit 50 (an example of “driving instruction receiving means” of the present invention) that receives an instruction regarding driving from the user on the top surface of the housing 10.

  As described above, the housing 10 of the hot air heating apparatus 100 is provided with the suction port 70 for taking in the outside air as the combustion air A on the back surface, and the mixed gas of the combustion exhaust gas and air after combustion is provided on the front surface. An air outlet 72 is provided for blowing out the hot air. On the back surface of the housing 10, an indoor temperature sensor 1 that can measure the temperature of the surrounding air, that is, the temperature of indoor air in which the hot air heating device 100 is used, is provided. That is, the indoor temperature sensor 1 functions as a suction air temperature measurement unit that measures the temperature of air sucked into the housing 10 from the suction port 70. An air filter 71 for capturing dust is set outside the suction port 70.

  The combustor 20 burns the fuel gas G together with the combustion air A. Specifically, a fuel gas passage 24 that guides the fuel gas G is connected to the combustor 20, and a first electromagnetic that stops or allows the fuel gas G to flow through the fuel gas passage 24. A valve 26a and a second electromagnetic valve 26b, a proportional valve 25 that can adjust the flow rate of the fuel gas G, and an injection nozzle 23 that injects the fuel gas G toward the combustor 20 are provided. Among these, the 1st electromagnetic valve 26a, the 2nd electromagnetic valve 26b, and the proportional valve 25 function as the fuel quantity adjustment means F which adjusts the fuel quantity supplied to the combustor 20. The reason why the two solenoid valves (the first solenoid valve 26a and the second solenoid valve 26b) are provided is to more reliably prevent the fuel gas G from leaking to the downstream side of the fuel gas passage 24. is there. In addition, the combustor 20 can detect the extinction of the flame by detecting the formed flame and the igniter 21 that ignites the mixture of the fuel gas G and the combustion air A guided to the combustion chamber 22. The flame sensor 4 is provided.

  The convection fan 40 as the air flow means of the present invention includes a cross flow fan 41 and a fan drive motor 42 that rotates the cross flow fan 41 in the circumferential direction. When the fan driving motor 42 rotates the cross flow fan 41, outside air is taken into the housing 10 from the suction port 70. A part of the air sucked into the housing 10 is guided to the combustion chamber 22 of the combustor 20 as combustion air A, and the remaining air flows around the combustion chamber 22 while flowing around the combustion chamber 22. Mixed with flue gas. As a result, the temperature of the air sucked into the housing 10 from the suction port 70 is raised and blown out from the air outlet 72 to the outside of the housing 10.

  FIG. 2 is a diagram illustrating a configuration example of the driving operation reception unit 50 according to the first embodiment. FIG. 3 is a diagram illustrating a transition example of the set value in the normal mode (first heating operation mode) displayed on the set room temperature display unit of the first embodiment, and FIG. 4 is a set room temperature display unit of the first embodiment. It is a figure which shows the example of a transition of the setting value of the displayed manual mode (2nd heating operation mode). FIG. 5 is a functional block diagram of the hot air heating device of the first embodiment.

  The driving operation reception unit 50 is provided on the top surface of the housing 10 and receives an instruction regarding driving from the user. The driving operation accepting unit 50 is an operation switch operated by a user or the like, and includes a nighttime timer switch S1, a good morning timer switch S2, an ecological operation switch S3, a manual mode switch S4, and a temperature / time setting switch (setting value switching). Switch) S5 (upward switch S5a, downward switch S5b) and an operation / stop switch S6. In addition, the driving operation reception unit 50 is a display unit that indicates the state of the hot air heating device 100. The good night timer lamp 51 that is lit during the setting of the good night timer and the good morning timer lamp that is lit during the setting of the good morning timer 52, an eco operation lamp 53 that is lit during the execution of the eco operation, a manual mode lamp 54 that is lit during the execution of the manual mode operation, and a filter clogged in the suction port 70 to the user. A filter cleaning lamp 55 that is turned on for notification, an operation state display lamp 56 that is turned on when the operation is being performed, and numbers, letters, symbols, and the like that represent setting values of the normal mode and the manual mode are displayed. And a current room temperature display unit 58 for displaying numbers, characters, symbols, and the like representing the current room temperature.

  The operation / stop switch S6 is a switch for instructing start and stop of operation. When the user presses the operation / stop switch S6 when the hot air heating apparatus 100 is in a stopped state, the control unit 80 receives the operation as an instruction to start the operation and turns on the operation state display lamp 56. . When the user presses the operation / stop switch S6 while the hot air heating device 100 is in operation, the control unit 80 accepts the operation as an instruction to stop operation and also displays an operation state display lamp. 56 is turned off.

  The control means 80 is a device configured using an electric circuit unit having an arithmetic processing function such as a microcomputer and an information storage function such as a semiconductor memory. Then, the control means 80 switches the hot air heating device 100 between the operation in the normal mode) and the operation in the manual mode in accordance with an instruction from the user. In this embodiment, if the manual mode switch S4 (described later) is not “on”, the control unit 80 determines that the operation execution instruction in the normal mode is received, and the manual mode switch S4 is “on”. If it has been operated, it is determined that the operation execution instruction in the manual mode has been received.

  When the control unit 80 receives an instruction to execute the operation in the normal mode, the indoor temperature sensor 1 is controlled so that the temperature of the air measured by the indoor temperature sensor 1 as the intake air temperature measuring unit becomes the set target temperature. Based on the temperature difference between the temperature of the air to be measured and the set target temperature, the target supply fuel amount to be supplied to the combustor 20 is determined from the total supply fuel amount range between the minimum supply fuel amount and the maximum supply fuel amount. Then, the target fuel supply amount is supplied to the combustor 20 by the fuel amount adjusting means F. As will be described later, a temperature / time setting switch (set value changeover switch) S5 as an operation instruction receiving means receives an instruction for setting a set target temperature used for operation in the normal mode from the user.

  In the present embodiment, the proportional valve 25 constituting the fuel amount adjusting means F is a step proportional valve that changes the valve opening corresponding to the amount of fuel supplied to the combustor 20 in a stepwise manner. And the control means 80 changes the fuel amount supplied to the combustor 20 in steps by changing the valve opening degree of the proportional valve 25 in steps. Table 1 shows an example of a total supply fuel amount range between the minimum supply fuel amount and the maximum supply fuel amount that the fuel amount adjusting means F can supply to the combustor 20. As shown in Table 1, the valve opening degree of the proportional valve 25 has a total of 12 stages from 1 stage (minimum supply fuel amount) to 12 stages (maximum supply fuel amount). For example, the amount of fuel supplied to the combustor 20 when the valve opening is one stage corresponds to 0.76 kW in terms of heating capacity. As the number of stages of the valve opening increases, the amount of fuel supplied to the combustor 20 (heating capacity) increases. The control means 80 controls the operating state of the convection fan 40 so as to supply the combustor 20 with air corresponding to the amount of fuel supplied to the combustor 20.

  The set target temperature when the control means 80 operates in the normal mode can be set by the user operating the temperature / time setting switch (set value changeover switch) S5. For example, the control unit 80 displays the set target temperature or the initial value input by the user on the set room temperature display unit 57 when operating in the normal mode. Each time the user presses and operates the upward switch S5a, the display value of the temperature is sequentially increased and changed, and every time the user presses and operates the downward switch S5b, the display value of the temperature is sequentially decreased and changed. By operating the hot air heating device 100 in the normal mode, the temperature of the air in the entire room where the hot air heating device 100 is installed is set to a predetermined set target temperature while the heating output is automatically changed as appropriate. Can do.

  FIG. 3 is a diagram illustrating a transition example of the set values in the normal mode displayed on the set room temperature display unit 57. In this example, the user can set the temperature from 12 ° C. to 26 ° C. in 1 ° C. increments as the set target temperature in the normal mode. Although illustration is omitted, at this time, the temperature currently measured by the room temperature sensor 1 is displayed on the room temperature display unit 58. In addition, the user can set “L (low)” as a setting state corresponding to a setting temperature lower than 12 ° C., and “H (high)” as a setting state corresponding to a setting temperature higher than 26 ° C. Can be set. For example, when “L (low)” is set, the set temperature is a low temperature such as 10 ° C., and when “H (high)” is set, the set temperature is a high temperature such as 45 ° C. . The plurality of set values shown in FIG. 3 are sequentially set and changed one step at a time in the order indicated by the arrows in FIG. 3 each time the user pushes the upward switch S5a and the downward switch S5b.

  On the other hand, as will be described in detail later, the control unit 80 adjusts the fuel amount to a certain amount when the manual mode switch S4 as the operation instruction receiving unit receives an operation execution instruction in the manual mode. The fuel to be supplied to the combustor 20 when a constant fuel amount operation in which the fuel is continuously supplied to the combustor 20 by the means F is performed and an excessive heating condition indicating that excessive heating is performed is satisfied. An overheating avoidance process including reducing the amount is performed. Here, after the amount of fuel supplied to the combustor 20 is decreased, the supply of the fuel amount is continued (that is, the combustion in the combustor 20 is continued), and the amount of fuel supplied to the combustor 20 is decreased. Both of them are set to zero (that is, the combustion in the combustor 20 is stopped) is included in the overheating avoidance process. As will be described later, the temperature / time setting switch (setting value changeover switch) S5 as the operation instruction receiving means is operated in the manual mode from the total supply fuel amount range adjusted by the fuel amount adjusting means F. A setting instruction for information that can specify the set fuel amount to be used is received.

  The manual mode switch S4 is a switch for instructing execution of the second heating operation mode of the present invention (manual mode described in the present embodiment). When the manual mode switch S4 is in the “on” operation state, the control means 80 operates the warm air heating device 100 in the manual mode, and when the manual mode switch S4 is in the “off” operation state, the control means 80 80 operates the hot air heater 100 in the normal mode. As described above, the manual mode switch S4 functions as an operation mode switching switch that switches between the normal mode (first heating operation mode) and the manual mode (second heating operation mode). Thus, the manual mode switch S4 is a dedicated switch for accepting execution and stop of the operation in the manual mode from the user. In the present embodiment, when the user performs an “on” operation on the manual mode switch S4, the control means 80 switches the operation to the manual mode and stores that the manual mode switch S4 is in the “on” state. Even after the operation is stopped, the fact that the manual mode switch S4 is in the “ON” state continues to be stored.

  FIG. 4 is a diagram illustrating a transition example of the set value of the manual mode displayed on the set room temperature display unit 57. In this example, the user can input any one of the five set values P1 to P5 as information that can specify the set fuel amount to be supplied to the combustor 20. Table 2 shows an example of a correspondence relationship between the set value in the manual mode and the set fuel amount (that is, the heating capacity) supplied to the combustor 20.

  In the present embodiment, as shown in Table 2, when the set value as information that can specify the set fuel amount used for the operation in the manual mode is “P1”, the fuel amount supplied to the combustor 20 is This corresponds to the fuel amount when the proportional valve 25 constituting the fuel amount adjusting means F shown in Table 1 is “1 stage”. Similarly, when the set value of the manual mode is “P2” to “P5”, the fuel amount supplied to the combustor 20 is “2” by the proportional valve 25 constituting the fuel amount adjusting means F shown in Table 1. This corresponds to the amount of fuel when “stage” to “5 stages”. Thus, the five set values P1 to P5 are set so that the amounts of fuel supplied to the combustor 20 are different from each other. It is assumed that the user knows the correspondence relationship in Table 2 that P1 has the lowest heating capacity and P5 has the highest heating capacity. Then, the setting states of P1 to P5 shown in FIG. 4 are sequentially changed one step at a time in the order indicated by the arrows in FIG. 4 every time the user pushes the upward switch S5a and the downward switch S5b. . The user can recognize that the operation in the manual mode is performed by looking at the set values P1 to P5 displayed on the set room temperature display unit 57. In addition, the control unit 80 stores a manual mode setting value (for example, any one of P1 to P5) set by the user.

  The nighttime timer switch S1 is a switch for making a reservation for stopping operation. When the user performs an “ON” operation on the sleep timer switch S1, the control unit 80 receives the operation as a reservation instruction for stopping the operation of the hot-air heating device 100 that is currently operating. For example, when the user performs an “ON” operation on the sleep timer switch S1, the control means 80 turns on the sleep timer lamp 51 and displays a number (initial value) indicating how many minutes the operation is stopped on the set room temperature display unit 57. ) Is displayed. Then, the control unit 80 increases the displayed time in response to the user pressing and pressing the upper switch S5a of the temperature / time setting switch S5, or the lower direction of the temperature / time setting switch S5. By reducing the displayed time in response to the user pressing the switch S5b, the displayed time is set as the remaining time until the operation is stopped. However, the upper limit of the time that can be set by this sleep timer is 60 minutes, for example.

  The good morning timer switch S2 is a switch for making a reservation for starting operation. When the user performs an “on” operation on the good morning timer switch S2, the control means 80 accepts the operation as a reservation instruction for starting the operation of the hot air heating apparatus 100 that is currently stopped. For example, when the user performs an “ON” operation on the good morning timer switch S2, the control means 80 turns on the good morning timer lamp 52 and also displays a number (initial value) indicating how many hours later the operation starts on the set room temperature display unit 57. ) Is displayed. Then, the control unit 80 increases the displayed time in response to the user pressing and pressing the upper switch S5a of the temperature / time setting switch S5, or the lower direction of the temperature / time setting switch S5. By reducing the displayed time in response to the user pressing the switch S5b, the displayed time is set as the remaining time until the start of operation.

  The eco-operation switch S3 is a switch for instructing execution of an operation that relatively reduces the amount of fuel consumed by the hot air heating device 100. When the user “turns on” the eco-operation switch S3, the control means 80 accepts the operation as an instruction to execute the eco-drive. For example, when the user presses the eco-operation switch S3, the control unit 80 turns on the eco-operation lamp 53 and starts operation in the eco-operation mode. In this eco-operation mode operation, the control means 80 operates at the set target temperature for 30 minutes when the room temperature measured by the room temperature sensor 1 rises to the set target temperature while performing the operation in the normal mode. Thereafter, the operation in the normal mode is continued in a state where the target temperature in actual operation control is lowered by 1 ° C. from the set target temperature. The set target temperature displayed on the set room temperature display unit 57 remains the set target temperature set by the user. Then, the control means 80 further operates for 30 minutes, and if the indoor temperature measured by the indoor temperature sensor 1 is equal to or higher than the target temperature (a temperature lower by 1 ° C. than the set target temperature), the actual operation control is further performed. Lower the set temperature by 1 ° C. In this way, the fuel cost can be saved by gradually lowering the set room temperature without greatly impairing the sensed temperature.

Inside the housing 10, a temperature sensor 2 for main body for measuring the internal temperature is provided. In the example shown in FIG. 1, the in-body temperature sensor 2 measures the temperature at the downstream side of the combustor 20 and the portion where the mixed gas flows after the combustion exhaust gas and air are mixed. Then, when it is determined that the measured temperature of the in-body temperature sensor 2 has reached an abnormally high temperature range, the control means 80 performs control such as stopping combustion of the combustor 20. The possibility that the measured temperature of the in-body temperature sensor 2 reaches such an abnormally high temperature range is likely to be clogging of the filter provided in the suction port 70. Therefore, when it is determined that the measured temperature of the in-body temperature sensor 2 has reached an abnormally high temperature range, the control means 80 turns on the filter cleaning lamp 55 in order to notify the user of this problem.
Further, a circuit temperature fuse 3 is provided in the middle of the electric circuit constituting the control means 80 and the like to disconnect the electric circuit when the temperature of the electric circuit exceeds a predetermined level. That is, when the circuit temperature fuse 3 is blown at a predetermined temperature, the operation of the electric circuit (that is, the control means 80) is stopped before the temperature that the electric circuit can withstand, and the operation of the hot air heater 100 is performed. It is stopped and the electric circuit is prevented from being damaged by heat.

Next, operation control of the hot air heating device 100 will be described.
FIG. 6 is a flowchart for explaining the heating operation of the first embodiment. When the operation / stop switch S6 is operated to “ON”, the control unit 80 proceeds to step # 10 and performs an operation start process. In this operation start process, when the hot air heating device 100 is switched from the operation stop state to the operation state, the control means 80 opens the first electromagnetic valve 26a and the second electromagnetic valve 26b and opens the proportional valve 25 to a predetermined value. The fuel gas G is injected from the injection nozzle 23 into the combustion chamber 22 of the combustor 20. At the same time, the control means 80 drives the fan driving motor 42 to operate the convection fan 40 and guides the combustion air A to the combustion chamber 22. The control means 80 ignites and burns the mixture of the fuel gas G and the combustion air A by the igniter 21.

  Next, in step # 11, the control means 80 determines whether or not the manual mode is in the “ON” state. If the manual mode is not in the “ON” state, the control unit 80 proceeds to step # 12 and operates in the normal mode. If the manual mode is in the “ON” state, the process proceeds to step # 13 and the operation in the manual mode is performed.

  In step # 12, the control means 80 operates in the normal mode, that is, based on the temperature difference between the air temperature measured by the room temperature sensor 1 and the set target temperature, the total supply fuel amount range shown in Table 1 ( That is, the target supply fuel amount to be supplied to the combustor 20 (that is, the proportional step number to be set) is determined from the range of the proportional stage number (1 to 12 stages). Supply to the combustor 20. As a result, control is performed so that the target fuel supply amount increases (that is, the number of proportional stages increases) as the temperature of the air measured by the room temperature sensor 1 is lower than the set target temperature. As described above, the control means 80 is configured so that the temperature of the air sucked into the housing 10 from the suction port 70 (that is, the temperature of the indoor air in which the hot air heating device 100 is installed) becomes the set target temperature. Since the amount of fuel supplied to 20 is adjusted, the temperature in the room where the warm air heating device 100 is installed approaches a comfortable state for the user.

  In Step # 13, the control means 80 performs an operation in the manual mode, that is, a constant fuel amount operation in which a constant fuel amount is continuously supplied to the combustor 20 by the fuel amount adjusting means F and burned. For example, when the control unit 80 performs the operation in the manual mode, if a setting value “P3” is previously set by the user as information that can specify the set fuel amount supplied to the combustor 20, Table 2 As shown in Fig. 5, the constant fuel amount operation is performed by setting the number of stages of the valve opening of the proportional valve 25 to "3 stages". Thus, by operating the warm air heating device 100 in the manual mode, the fuel amount burned in the combustor 20 of the warm air heating device 100 is maintained at a constant fuel amount designated by the user (that is, It is possible to perform local heating (for example, heating in a range where hot air blown directly hits) in a state where the heating output is maintained constant.

  In addition, since the fuel amount combusted by the combustor 20 is maintained at a constant value when the constant fuel amount operation is performed in the manual mode, the temperature of the room in which the hot air heating device 100 is installed is controlled. Is not done. Therefore, the room temperature gradually rises even if the amount of fuel supplied to the combustor 20 remains constant, depending on the size of the room, the outside air entering and exiting the room (people entering and exiting the room), the outside air temperature, etc. Sometimes. That is, the air in the entire room is heated more than necessary. In such a case, there arises a problem that the running cost becomes high.

  Therefore, in step # 14, the control means 80 determines whether or not an excessive heating condition indicating that excessive heating is performed is satisfied. And the control means 80 performs the overheating avoidance process including reducing the fuel quantity supplied to the combustor 20, when the overheating conditions which show that excessive heating is performed are satisfy | filled. Specifically, the overheating avoidance process of the present embodiment performs a constant fuel amount operation after performing a fuel amount reduction process for reducing the amount of fuel supplied to the combustor 20 by a predetermined amount when the overheating condition is satisfied. More specifically, combustion is performed on condition that the amount of fuel supplied to the combustor 20 is not the minimum amount of fuel supplied (that is, “No” in step # 15). This is a process of continuing the constant fuel amount operation after performing a fuel amount reduction process for reducing the amount of fuel supplied to the container 20 by a predetermined amount. For example, when the constant fuel amount operation is performed in which the number of stages of the opening degree of the proportional valve 25 is set to “3 stages” before it is determined that the overheating condition is satisfied, the control unit 80 After the fuel amount reduction process is performed such that the number of stages of the valve opening degree of 25 is “two stages”, the constant fuel amount operation is continued. In addition, by the fuel amount reduction process, the number of stages of the valve opening of the proportional valve 25 may be decreased by a plurality of stages instead of decreasing by one stage from “3 stages” to “2 stages” (for example, “3 stages”). May be lowered by two stages from "1 stage").

In the present embodiment, in step # 14, the control means 80 determines that the overheating condition is satisfied when the temperature of the air measured by the room temperature sensor 1 is equal to or higher than a predetermined determination temperature. Alternatively, the control unit 80 may determine that the overheating condition is satisfied when a period in which the temperature of the air measured by the room temperature sensor 1 is equal to or higher than a predetermined determination temperature continues for a predetermined period.
For example, the control means 80 stores a temperature of 22 ° C. as the discrimination temperature, and the overheating condition (temperature condition: 22 ° C.) is satisfied when the temperature of the air measured by the room temperature sensor 1 becomes 22 ° C. or higher. It is determined that Alternatively, the control means 80 stores a temperature of 22 ° C. as the discrimination temperature, and the period during which the temperature of the air measured by the room temperature sensor 1 is 22 ° C. or more continues for 30 minutes (an example of the predetermined period). Then, it is determined that the overheating condition (temperature condition: 22 ° C. and time condition: 30 minutes) is satisfied.

Here, any of the above-described overheating conditions, that is, the first overheating condition having only the temperature condition as described above, or the second overheating condition having the temperature condition and the time condition as described above. It can be set as appropriate as to whether to adopt.
For example, when the control unit 80 has not yet performed the fuel amount reduction process after starting the operation in the manual mode, the first overheating condition is adopted, and the fuel after the operation in the manual mode is started. You may employ | adopt combining a 1st overheating condition and a 2nd overheating condition so that the said 2nd overheating condition may be employ | adopted after performing a quantity reduction process. As a specific example, the control means 80 has an air temperature measured by the indoor temperature sensor 1 of 22 ° C. (predetermined) while the fuel amount reduction process has not been performed since the operation in the manual mode was started. When the temperature is higher than the determination temperature), it is determined that the overheating condition is satisfied, and a fuel amount reduction process is performed. After such a fuel reduction process, the temperature of the air measured by the indoor temperature sensor 1 is 22 ° C. or higher. If the period of time continues for 30 minutes, it may be controlled to determine that the excessive heating condition is satisfied.
Of course, after the control unit 80 has not yet performed the fuel amount reduction process after starting the operation in the manual mode, and after the fuel amount reduction process has been performed after the operation in the manual mode is started. In any case, it may be configured to employ only the first overheating condition, or may be configured to employ only the second overheating condition.

Thus, as shown in Step # 13 to Step # 16 in FIG. 6, the control means 80 is not operated in the manual mode unless the fuel amount supplied to the combustor 20 is not the minimum fuel supply amount. That is, every time it is determined that the overheating condition is satisfied (unless the valve opening of the proportional valve 25 is “1 stage” shown in Table 2), the fuel amount reduction process is performed.
On the other hand, when the control unit 80 determines that the overheating condition is not satisfied (that is, “No” in step 14 #), the control unit 80 does not perform the fuel amount reduction process described above, and performs the manual mode with the fuel amount as it is. In order to continue the operation in step 1, the process proceeds to step # 17.

  In addition, when the control unit 80 performs the constant fuel amount operation in the manual mode, if the overheating condition is satisfied in a state where the fuel amount supplied to the combustor 20 is the minimum supply fuel amount, the overheating avoiding process is performed. As described above, the amount of fuel supplied to the combustor 20 is reduced to zero, that is, the supply of fuel to the combustor 20 is stopped to stop the combustion of fuel in the combustor 20. That is, as shown in Step # 14 to Step # 15 in FIG. 6, the control means 80 satisfies the overheating condition indicating that excessive heating is performed, and supplies it to the combustor 20. If the amount of fuel being supplied is the minimum amount of fuel supplied (that is, “Yes” in step # 15), the supply of fuel to the combustor 20 is stopped and the combustion of fuel in the combustor 20 is stopped. Stop (step # 18).

  In step # 17, the control means 80 determines whether or not the run / stop switch S6 has been "turned off". If the "turn off" operation has not been performed, the control means 80 returns to step # 11. The operation of the hot air heater 100 is stopped.

As described above, in the hot air heating apparatus 100 of the present embodiment, when the operation in the normal mode is performed, the temperature of the air sucked into the housing 10 from the suction port 70 (for example, the hot air heating apparatus 100 is The amount of fuel supplied to the combustor 20 is automatically adjusted so that the temperature of the installed indoor air) becomes the set target temperature received from the user. As a result, the temperature of the room in which the hot air heater 100 is installed approaches a comfortable state for the user.
In addition, in the hot air heating apparatus 100 of the present embodiment, when the operation in the manual mode is performed, a constant amount of fuel is continuously supplied to the combustor 20 by the fuel amount adjusting means F and burned. The fuel amount operation is configured to be performed, and the constant fuel amount when the constant fuel amount operation is started is a value (set fuel amount) received from the user. That is, the constant amount of fuel supplied to the combustor 20 and combusted is not a value automatically adjusted by the hot air heating device 100, but a value (set fuel amount) received from the user. However, it is avoided that the running cost is higher than necessary for the user. Furthermore, when the above-described overheating condition is satisfied, an overheating avoidance process (step # 15, step # 16, step # 18 shown in FIG. 6) including reducing the amount of fuel supplied to the combustor 20 is performed. . That is, the fact that excessive heating is performed indicates that the amount of fuel supplied to the combustor 20 and burned is excessive, and therefore the amount of fuel supplied to the combustor 20 is reduced. By performing the excessive heating avoidance process including the above, it is possible to achieve both suppression of excessive heating and further reduction in running cost. Therefore, it is possible to provide the warm air heating device 100 that can avoid an increase in running cost more than necessary.

Second Embodiment
The warm air heating device of the second embodiment is different from the above embodiment in that the manual mode switch S4 is not provided. Although the hot air heating apparatus of 2nd Embodiment is demonstrated below, description is abbreviate | omitted about the structure similar to the said embodiment.

  FIG. 7 is a diagram illustrating a configuration example of the driving operation reception unit of the second embodiment. As shown in FIG. 7, in the present embodiment, the manual mode switch S <b> 4 provided in the above embodiment is not provided in the driving operation reception unit 50. Instead, in the present embodiment, the temperature / time setting switch S5 is used to accept the execution and stop of the operation in the manual mode (second heating operation mode) from the user.

  FIG. 8 is a diagram illustrating a transition example of the set values of the normal mode and the manual mode displayed on the set room temperature display unit 57 of the second embodiment. In this example, the user sets the normal mode set value (set target temperature) to 12 ° C. to 26 ° C. and the set value of the manual mode (set fuel) at a stage lower than the “L” state and the “H” state. P1 to P5 (similar to those shown in Table 2 of the first embodiment) are provided as information capable of specifying the amount). Each time the temperature / time setting switch S5 (corresponding to the “set value changeover switch” of the present invention) of the driving operation receiving unit 50 is pushed by the user, the set target temperature used for driving in the normal mode is used. Set values (12 ° C. to 26 ° C. and “L” state and “H” state) and a plurality of set values (P1 to P5) as information that can specify the set fuel amount used for the operation in the manual mode. Any one set value in the set value group including the above is sequentially changed step by step in the order indicated by the arrows in FIG.

  Specifically, when “L”, which is the setting for the normal mode, is displayed on the set room temperature display portion 57, when the downward switch S5b is further pressed, the setting is set to “P5” for the manual mode. The display switches. The control means 80 operates when the set value of the normal mode is set by the temperature / time setting switch S5 (that is, when the set target temperature of the normal mode is displayed on the set room temperature display unit 57). When the driving operation receiving unit 50 as the instruction receiving unit determines that the operation execution instruction in the normal mode is received and the set value of the manual mode is set by the temperature / time setting switch S5 (that is, the setting) When any one of P1 to P5 as the manual mode setting value is displayed on the room temperature display unit 57), the driving operation receiving unit 50 as the driving instruction receiving unit receives the driving execution instruction in the manual mode. Is determined.

  As described above, the temperature / time setting switch S5 is pushed to a plurality of set values (H, 26 ° C., 25 ° C.,..., 13 ° C., 12 ° C., L) as set target temperatures in the normal mode. Each time the setting is changed sequentially, the change order is determined, and each time the temperature / time setting switch S5 is pushed, one set value as the set target temperature is changed to another set value as the set target temperature. The setting is changed sequentially. For the plurality of set values (P1 to P5) as information that can specify the set fuel amount in the manual mode, a change order when the temperature / time setting switch S5 is sequentially changed is determined each time the temperature / time setting switch S5 is pushed. Each time the temperature / time setting switch S5 is pushed, the setting is sequentially changed from one set value as information for specifying the set fuel amount to another set value. Further, there is one first boundary set value (L) among the plurality of set values as the set target temperature in the normal mode, and among the plurality of set values as information that can specify the set fuel amount in the manual mode. There is one second boundary setting value (P5).

  Then, the control means 80 performs a push operation on the downward switch S5b (temperature / time setting switch S5) to change the first boundary set value from one set value (12 ° C.) as the set target temperature in the normal mode. If the downward switch S5b (temperature / time setting switch S5) is further pushed after the setting is changed to a certain setting value (L), the setting value (P5) is set as the second boundary setting value in the manual mode. change. Further, the control means 80 performs the second operation from one set value (P4) as information that can specify the set fuel amount in the manual mode by performing a pressing operation on the upward switch S5a (temperature / time setting switch S5). If the upward switch S5a (temperature / time setting switch S5) is further pressed after the setting is changed to the setting value (P5) that is the boundary setting value, the setting value (the first boundary setting value in the normal mode) ( Change the setting to L).

As described above, each time the user presses the temperature / time setting switch S5, any one setting in the set value group including the plurality of setting values in the normal mode and the plurality of setting values in the manual mode is set. The value is sequentially changed. That is, the setting value for the normal mode (first heating operation mode) and the setting value for the manual mode (second heating operation mode) can be set using one temperature / time setting switch S5. A switch for setting the value and a switch for setting the setting value of the manual mode may not be separately mounted on the hot air heating apparatus 100.
In addition, the control means 80 is in the normal mode when the set value of the normal mode is set by the temperature / time setting switch S5 (that is, when the set value of the normal mode is displayed on the set room temperature display unit 57). When the set value of the manual mode is set by the temperature / time setting switch S5 (that is, when the set value of the manual mode is displayed on the set room temperature display unit 57) ) since it is determined that operation of the manual mode is instructed, the user switch and the warm-air heating apparatus for indicating the operation of the switch and manual mode for indicating the operation in the normal mode 100 Need not be installed separately.

<Third Embodiment>
The warm air heating device of the third embodiment is different from the second embodiment in the transition form between the normal mode setting value and the manual mode setting value when the temperature / time setting switch S5 is pushed. Although the hot air heating apparatus of 3rd Embodiment is demonstrated below, description is abbreviate | omitted about the structure similar to the said embodiment.

  In the second embodiment, every time the user presses the temperature / time setting switch S5, any one of a set value group including a plurality of set values in the normal mode and a plurality of set values in the manual mode is selected. An example has been described in which the setting values are sequentially changed one step at a time. In this case, if the temperature / time setting switch S5 is not pressed many times, the state transition between the state in which the normal mode setting value is set and the state in which the manual mode setting value is set I can not let you. For example, in the example shown in FIG. 8, a transition is made from a state in which “26 ° C.” as the set value in the normal mode is set to a state in which “P3” is set as the set value in the manual mode. In addition, the user must press the down switch S5b of the temperature / time setting switch S5 18 times.

  In view of such a problem, the control unit 80 performs a long pressing operation when the pressing operation on the temperature / time setting switch S5 by the user continues for a set time or longer and a pressing operation on the temperature / time setting switch S5 by the user. You may comprise so that it may discriminate | determine and distinguish from the normal pushing operation when it continues for less than the said setting time. For example, when the control unit 80 continues the pressing operation on the temperature / time setting switch S5 by the user for 3 seconds or more and the pressing operation on the temperature / time setting switch S5 by the user for less than 3 seconds. The normal pressing operation may be distinguished and determined.

Then, the control unit 80 sets the manual mode when a long press operation is performed on the temperature / time setting switch S5 by the user in a state where any one of the set target temperatures in the normal mode is set. Change the setting of the fuel amount to a specific set value among a plurality of set values as identifiable information, and any one of the set values as information capable of specifying the set fuel amount in the manual mode When the user performs a long press operation on the temperature / time setting switch S5 while the set value is set, the setting is changed to a specific set value in the set target temperature in the normal mode.
On the other hand, when the normal pressing operation on the temperature / time setting switch S5 by the user is performed, the control means 80 sequentially sets each set value step by step as described in the second embodiment. Change settings.

  For example, the control means 80 sets the manual mode when the user presses and holds down the down switch S5b of the temperature / time setting switch S5 from the state where “26 ° C.” is set as the set target temperature in the normal mode. Transition is made to a state in which “P3” as a specific set value among a plurality of set values as information capable of specifying the fuel amount is set. On the other hand, the control means 80 allows the user to change the temperature / time setting switch S5 from the state in which “P3” among the plurality of set values as information that can specify the set fuel amount in the manual mode is set. When the upward switch S5a is pressed for a long time, a transition is made to a state where “26 ° C.” as a specific set value in the set target temperature of the normal mode is set.

  Here, the control means 80 stores the set target temperature in the normal mode (in this case “26 ° C.”), which is the latest set value at the stage when the normal mode is switched to the manual mode in the past. The stored set target temperature is set as a specific set value in the set target temperature (that is, a set value to be changed by a long press operation). Similarly, the control means 80 stores a set value (in this case, “P3”) in the manual mode, which is the latest setting value at the stage when the manual mode is switched to the normal mode in the past. The stored set value is set as a specific set value (that is, a set value to be changed by a long press operation) among a plurality of set values as information capable of specifying the set fuel amount in the manual mode.

  As described above, in the present embodiment, the control unit 80 allows the user to perform a long press operation on the temperature / time setting switch S5 in a state where any set value among the set target temperatures in the normal mode is set. When set, the manual mode setting fuel amount is changed to a specific setting value among a plurality of setting values as identifiable information, and the manual mode setting fuel amount is specified as a plurality of information as identifiable information. If a long press operation is performed on the temperature / time setting switch S5 by the user while any one of the set values is set, the set value is set to a specific set value within the set target temperature in the normal mode. change. In other words, the user can change the setting between the state in which the setting value of the normal mode is set and the state in which the setting value of the manual mode is set by one long press operation on the temperature / time setting switch S5. Can be made.

<Fourth embodiment>
The warm air heating device of the fourth embodiment differs from the above embodiment in the content of the overheating avoidance process. Although the hot air heating apparatus of 4th Embodiment is demonstrated below, description is abbreviate | omitted about the structure similar to the said embodiment.

FIG. 9 is a flowchart illustrating the heating operation of the fourth embodiment.
The flowchart shown in FIG. 9 of the present embodiment is obtained by omitting step # 15 and step # 16 of the flowchart described in FIG. In the present embodiment, when the overheating condition is satisfied, the control unit 80 performs an overheating avoidance process for stopping the supply of fuel to the combustor 20 and stopping the combustion in the combustor 20. That is, the control means 80 continuously supplies a certain amount of fuel to the combustor 20 by the fuel amount adjusting means F and burns it when the driving operation accepting unit 50 accepts an instruction to perform driving in the manual mode. When a constant fuel amount operation is performed (step # 13) and an excessive heating condition indicating that excessive heating is performed during the constant fuel amount operation is performed (in step # 14, “ Yes "), the amount of fuel supplied to the combustor 20 is decreased to zero, that is, the fuel supply to the combustor 20 is stopped to stop the combustion of fuel in the combustor 20 (step # 18). ). As described above, also in the present embodiment, by performing the constant fuel amount operation, it is possible to prevent the heating from being performed while taking a running cost more than necessary for the user. Further, when the above-described excessive heating condition is satisfied, the supply of fuel to the combustor 20 is stopped and the combustion in the combustor 20 is stopped, thereby combining the suppression of excessive heating and the further reduction in running cost. Can be achieved.

<Another embodiment>
<1>
In the above embodiment, the configuration of the hot air heating device 100 has been described with a specific example, but the configuration can be changed as appropriate. For example, although the example in which the proportional valve 25 has 12 proportional stages has been described, a proportional valve 25 having more or less than 12 proportional stages may be used. In addition, although the example in which the proportional valve 25 is a step proportional valve that changes the valve opening corresponding to the amount of fuel supplied to the combustor 20 in a stepwise manner has been described, it corresponds to the amount of fuel supplied to the combustor 20. It is also possible to use a stepless proportional valve that continuously changes the valve opening.

<2>
In the embodiment, a plurality of set values (set target temperature) in the normal mode (first heating operation mode) and a plurality of set values (information that can specify the set fuel amount) in the manual mode (second heating operation mode). However, the setting values can be changed as appropriate. Moreover, in Table 1 and Table 2, although the relationship between the proportional step number of the valve opening degree of the proportional valve 25 and the heating output has been described with specific numerical values, those numerical values can be appropriately changed.
Further, in the above-described embodiment, an example has been described in which the control unit 80 determines that the long press operation has been performed when the user presses the temperature / time setting switch S5 for 3 seconds or longer. Whether it is determined that a long press operation has been performed when it continues for more than a second can be appropriately changed.

<3>
In the above embodiment, the predetermined determination temperature is exemplified as an index for determining whether or not the excessive heating condition indicating that excessive heating is performed, but the determination temperature may be a fixed value. It may be good or variable. For example, the control means 80 can consistently use a temperature of 22 ° C. as a fixed value of the discrimination temperature as exemplified in the above embodiment. Alternatively, the control unit 80 may perform the fuel amount reduction process and change the determination temperature to the high temperature side. For example, the control means 80 sets the initial value of the discrimination temperature to 22 ° C. regardless of the amount of fuel supplied to the combustor 20 during a constant fuel amount operation, and performs one or more fuel amount reduction processes. The determination temperature may be changed to a high temperature side by a predetermined temperature such as 0.5 ° C. or 1 ° C. each time the operation is performed.
In addition, the fuel amount to be supplied to the combustor 20 during the constant fuel amount operation is the minimum fuel supply amount (in the above example, the set value: “P1” (that is, the number of stages of the proportional valve 25 is “1 Only the temperature for determination in the stage “)) may be set to the high temperature side. For example, when the constant fuel amount operation is performed with the set value: “P2” to “P5”, the discrimination temperature is set to 22 ° C., and when the constant fuel amount operation is performed with the set value: “P1”. The discrimination temperature may be changed to be set to the highest temperature of 26 ° C. That is, in this case, if overheating conditions (including at least the temperature condition: 26 ° C.) are satisfied while the constant fuel amount operation is performed at the set value: “P1”, fuel combustion in the combustor 20 is performed. Will be stopped.

  As another example, as illustrated in Table 3 below, the determination temperature may be set in association with each of a plurality of set values as information that can specify the set fuel amount in the manual mode. In the example shown in Table 3, the temperature for determination becomes lower as the amount of fuel supplied to the combustor 20 in a constant amount of fuel operation becomes lower. The discrimination temperature is set in association with each set value. For example, the setting value in the manual mode when the amount of fuel supplied to the combustor 20 is the maximum: “P5” (that is, the number of stages of the proportional valve 25 is “5 stages”), the discrimination temperature is set to 22 ° C. When the amount of fuel supplied to the combustor 20 is the smallest, the manual mode setting value is “P1” (ie, the number of stages of the proportional valve 25 is “1 stage”), and the discrimination temperature is set to 26 ° C. Has been.

<4>
The setting value of the change destination when the long press operation described in the third embodiment is performed can be changed as appropriate. For example, in the third embodiment, when switching from the manual mode to the normal mode in response to the long press operation being performed, as a setting value of the change-destination normal mode, the mode has been switched from the normal mode to the manual mode in the past. The most recent setting value (“26 ° C.”) is used, but other setting values may be used.
For example, the recommended setting value when operating the hot air heater 100 in the normal mode is “22 ° C.”, and the recommended setting value when operating the hot air heater 100 in the manual mode is “P4”. When the control unit 80 stores these setting values, the control unit 80 may adopt the recommended setting value as the setting value of the change destination when the long press operation is performed. . Alternatively, the control unit 80 may select a median value among a plurality of set values in the normal mode (for example, “19 ° C.” which is a median value between 12 ° C. and 26 ° C.) and a set value among the set values in the manual mode. A median value (for example, “P3” that is a median value between P1 and P5) may be set as a setting value for a change destination when a long press operation is performed.

  INDUSTRIAL APPLICABILITY The present invention can be used for a hot air heater that can adjust the temperature of hot air blown out to a desired temperature while ensuring high heating capacity.

1 Indoor temperature sensor (intake air temperature measurement means)
10 Housing 20 Combustor 25 Proportional valve (Fuel amount adjusting means F)
26a First solenoid valve (fuel amount adjusting means F)
26b Second solenoid valve (fuel amount adjusting means F)
40 Convection fan (air flow means)
50 Driving operation reception part (driving instruction reception means)
S4 Manual mode switch S5 Temperature / time setting switch (Set value changeover switch)
S5a Up direction switch (setting value changeover switch)
S5b Down switch (Set value changeover switch)
70 Inlet 72 Outlet 80 Control means 100 Hot air heater

Claims (6)

A combustor that burns fuel, a fuel amount adjusting means that adjusts the amount of fuel supplied to the combustor, and a suction port through which air is sucked and an air outlet that blows out air, and the suction port. Air flow means for causing air to flow so that air is sucked into the casing and air is blown out from the casing through the outlet; and control means for controlling the operation of each means. The warm air heating device that raises the temperature of the air by mixing the air sucked into the casing from the suction port with the combustion exhaust gas of the combustor and blows the heated air from the outlet,
Suction air temperature measuring means for measuring the temperature of air sucked into the housing from the suction port;
Driving instruction receiving means for receiving driving instructions from the user,
The operation instruction accepting unit accepts a setting target temperature setting instruction used for operation in the first heating operation mode from a user, and a minimum supply fuel amount and a maximum supply fuel amount adjusted by the fuel amount adjustment unit, An instruction to set information that can specify the set fuel amount used for the operation in the second heating operation mode is received from the entire supply fuel amount range during
The control means includes
When the operation instruction accepting unit accepts an operation execution instruction in the first heating operation mode, the temperature of the air measured by the intake air temperature measuring unit is the set target temperature received by the operation instruction accepting unit Based on the temperature difference between the air temperature measured by the intake air temperature measuring means and the set target temperature, a target supply fuel amount to be supplied to the combustor is determined from the total supply fuel amount range. The target supply fuel amount is supplied to the combustor by the fuel amount adjusting means, and
When the operation instruction receiving means receives an operation execution instruction in the second heating operation mode, a constant fuel amount is continuously supplied to the combustor by the fuel amount adjusting means and burned. When the operation is performed and an overheating condition indicating that excessive heating is performed is satisfied, an overheating avoidance process including reducing the amount of fuel supplied to the combustor is performed,
When starting the operation in the second heating operation mode, the set fuel amount in the second heating operation mode received by the operation instruction receiving means is supplied to the combustor in the constant fuel amount operation. Fuel amount ,
Each time the operation instruction receiving means is pushed by the user, the operation instruction receiving means is used for a plurality of set values as the set target temperature used for the operation in the first heating operation mode and the operation in the second heating operation mode. A set value changeover switch in which any one set value of a set value group including a plurality of set values as information capable of specifying the set fuel amount to be used is sequentially changed;
The control means includes
When the set value as the set target temperature is set by the set value changeover switch, it is determined that the operation instruction receiving means has received an operation execution instruction in the first heating operation mode, and the set value When the set value as information that can specify the set fuel amount is set by the changeover switch, it is determined that the operation instruction reception unit has received an operation execution instruction in the second heating operation mode;
Distinguishing between a long press operation when the user presses the set value changeover switch for a set time or longer and a normal press operation when the user presses the set value changeover switch for less than the set time. Judgment,
In the plurality of set values as the set target temperature in the first heating operation mode, a change order is set when the set value changeover switch is sequentially changed every time the set value changeover switch is normally pressed, and There is one first boundary set value among a plurality of set values as the set target temperature,
The plurality of set values as information that can specify the set fuel amount in the second heating operation mode has a change order when the set value changeover switch is sequentially changed every time the set value changeover switch is normally pressed. And there is one second boundary set value among a plurality of set values as information capable of specifying the set fuel amount,
In a state where any one of the set target temperatures in the first heating operation mode is set, when the user performs a long press operation on the set value changeover switch, the second heating operation mode Change the setting fuel amount to a specific setting value among a plurality of setting values as identifiable information,
The long press operation on the set value changeover switch by the user in a state where any set value among a plurality of set values as information capable of specifying the set fuel amount in the second heating operation mode is set Is performed, the setting is changed to a specific set value in the set target temperature of the first heating operation mode,
Each time the normal push operation is performed on the set value changeover switch, the setting is sequentially changed from one set value as the set target temperature to another set value as the set target temperature, and the set target temperature is set as the set target temperature. When the normal pressing operation is performed on the set value changeover switch after changing the setting from one set value to the set value that is the first boundary set value, the setting is changed to the set value that is the second boundary set value. And
Each time the normal push operation is performed on the set value changeover switch, the set fuel amount is sequentially set from one set value as information that can specify the set fuel amount to another set value as information that can specify the set fuel amount. The normal push operation is performed on the set value changeover switch after the setting value is changed from one set value as information that can specify the set fuel amount to the set value that is the second boundary set value. And a hot-air heater that changes the setting to the set value that is the first boundary set value .   The hot air heating apparatus according to claim 1, wherein the control means determines that the excessive heating condition is satisfied when the temperature of the air measured by the intake air temperature measuring means is equal to or higher than a predetermined determination temperature.   3. The control unit according to claim 1, wherein the control unit determines that the overheating condition is satisfied when a period in which the temperature of the air measured by the intake air temperature measurement unit is equal to or higher than a predetermined determination temperature continues for a predetermined period. Hot air heating device.   The overheating avoidance process is a process of continuing the constant fuel amount operation after performing a fuel amount reduction process for reducing the amount of fuel supplied to the combustor by a predetermined amount when the overheating condition is satisfied. The hot air heating apparatus as described in any one of Claims 1-3.   When the control unit is performing the constant fuel amount operation in the second heating operation mode, the overheating condition is satisfied in a state where the amount of fuel supplied to the combustor is the minimum supply fuel amount, The warm air heating device according to claim 4, wherein as the overheating avoidance processing, supply of fuel to the combustor is stopped to stop combustion in the combustor.   The said overheating avoidance process is a process which stops supply of the fuel to the said combustor, and stops the combustion in the said combustor, when the said overheating conditions are satisfy | filled. The hot-air heating device described in 1.

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