JP7068834B2 - Heating equipment - Google Patents

Description

The present invention relates to a heating device that raises the temperature of air by mixing the air sucked into the housing from the suction port with the combustion exhaust gas generated by the combustion means, and blows out the raised air from the outlet.

Heating devices such as gas fan heaters and oil fan heaters use a hot air circulation system that mixes the indoor air sucked into the housing with the combustion exhaust gas of the combustion means and blows it out into the room. It is the best heating equipment for heating the whole.

As such a heating device, the present applicant proposes a hot air heating device described in Patent Document 1. The hot air heating device described in Patent Document 1 adjusts a combustor that burns fuel and the amount of fuel supplied to the combustor inside a housing having a suction port for sucking air and an outlet for blowing air. Fuel amount adjusting means, convection fan that allows air to flow so that air is taken in from the suction port to the housing through a filter and air is blown out from inside the housing through the outlet, and the internal temperature of the housing. It is equipped with a temperature sensor for the inside of the main body to measure, control means to control the operation, etc., and also has a driving operation reception unit that receives instructions regarding operation from the user, and the operation reception unit is equipped with warm air. As a display unit indicating the status of the heating device, an operation status display lamp, a filter cleaning lamp, and the like are provided. Then, in this hot air heating device, the combustion amount of the combustor is adjusted by adjusting the amount of fuel supplied to the combustor by the fuel amount adjusting means.

Conventionally, in a hot air heating device having such a configuration, the filter is clogged with dust and the amount of air sucked from the suction port gradually decreases, or dust enters the housing and the convection fan. There is a problem that the air flow inside the housing deteriorates due to the accumulation of dust on the fin surface, and the temperature inside the housing gradually rises during use. Therefore, in such a hot air heating device, when the temperature measured by the temperature sensor for the main body exceeds the first threshold value, the control means turns on the filter cleaning lamp of the display unit, and it is necessary to clean the filter. I try to inform the user that there is something.

Further, in the hot air heating device having the above configuration, when the filter cleaning lamp is lit but the filter is continued to be used without cleaning, or all or one of the filters and the outlets are used. If the part is closed by a curtain or the like, the inside of the housing may become abnormally overheated, which may cause a malfunction of the equipment. Therefore, in the hot air heating device, when the temperature measured by the temperature sensor for the main body exceeds the second threshold value higher than the first threshold value, the control means automatically stops the device, resulting in a failure of the device. In addition to preventing this, the display unit displays the fact that the device has been automatically stopped, and informs the user that the device has stopped due to abnormal overheating.

In addition, even though the temperature inside the housing has reached the first threshold, if the operation is continued while maintaining the maximum combustion amount of the combustor, the temperature of the hot air blown out gradually rises, and the warm air is blown out. The problem that the floor surface where the heating device is installed is exposed to high temperature warm air and discolors, or when the user cannot clean the filter immediately, the temperature inside the housing immediately reaches the second threshold and the device However, there was a problem that it automatically stopped due to abnormal overheating. Therefore, in order to solve such a problem, in the heating operation device, the control means reduces the maximum combustion amount of the combustor at the same time as turning on the filter cleaning lamp.

JP-A-2015-222141

The problems of the hot air heating device as described in Patent Document 1 will be described below with reference to FIGS. 8 to 10. 8 is a graph for explaining a state in which normal heating operation is performed, FIG. 9 is a state in which heating operation is continued with the filter cleaning lamp lit, and FIG. 10 is a graph for explaining a state in which automatic stop occurs due to abnormal overheating. In each figure, (a) shows the relationship between the operating time and the room temperature, (b) shows the relationship between the operating time and the temperature inside the housing, and (c) shows the relationship between the operating time and the amount of combustion. ..

As shown in FIG. 8, in the above-mentioned hot air heating device, when the normal heating operation is performed, the operation is performed at the maximum combustion amount (4.07 kW in this example) until the room temperature reaches the target set temperature, and the room is operated. After the temperature reaches the target set temperature, the operation is performed so that the room temperature is maintained at the target set temperature while gradually reducing the amount of combustion.

However, in the above-mentioned hot air heating device, as described above, minute dust that could not be completely removed by the filter invades into the housing and accumulates on the convection fan depending on the usage condition (for example, integrated operation time). In some cases, the temperature inside the housing rises due to deterioration of the air flow in the housing, exceeds the first threshold value, and the filter cleaning lamp lights up.

In this case, as shown in FIG. 9, the maximum combustion amount of the combustor is reduced (in this example, 4.07 kW to 2.87 kW), and the operation is performed in a state where the original performance is not exhibited. The room temperature must be raised to the target set temperature. In addition, even if the user stops the operation and cleans the filter, the cause of the temperature rise inside the housing is not eliminated. Therefore, when the operation is restarted, the temperature inside the housing immediately rises. The filter cleaning lamp will continue to light beyond one threshold.

Further, when the filter cleaning lamp is turned on immediately after the start of operation and the heating device is continued to be used, the temperature inside the housing immediately reaches the second threshold value as shown in FIG. The device will automatically stop due to abnormal overheating at a timing unexpected by the user before the room temperature rises and reaches the target set temperature.

Such a problem is that when the filter cleaning lamp comes on, the filter cleaning lamp comes on even though the user needs to request disassembly and cleaning to remove the dust inside the housing. Even in this state, the heating operation is performed with the maximum combustion amount lowered until the temperature inside the housing reaches the second threshold value, so the user said that the heating performance deteriorated because the device became old. It is caused by the inability to recognize and properly recognize the necessity of inspection of equipment such as disassembly and cleaning.

The present invention has been made in view of the above circumstances, and an object of the present invention is to inform the user of the necessity of inspecting the device while suppressing the cost without requiring the addition of a new sensor or the like. The point is to provide a heating device that can be used.

The characteristic configuration of the heating device according to the present invention for achieving the above object is that a combustion means for burning fuel and a combustion exhaust gas generated by the combustion means are filtered inside a housing having a suction port and an outlet. It is a heating device equipped with an air flow means for blowing out air from an outlet to a space to be heated together with air sucked from a suction port through a heating device.
Control means to control the operation and
An inspection notification means for notifying the necessity of inspection regarding the heating device , and
It is provided with an internal temperature measuring means for measuring the internal temperature of the housing .
The control means is
Based on the integrated operation time of the heating device, which is information on the usage status of the heating device, and the internal temperature measured by the internal temperature measuring means, it is determined whether or not the operation start condition of the inspection notification means is satisfied. Then, when the integrated operation time reaches a preset time and the internal temperature measured by the internal temperature measuring means reaches the preset inspection notification means operating temperature, the operation start condition is satisfied. The point is to make a determination and perform a process including operating the inspection notification means.

According to the above-mentioned feature configuration, the control means determines whether or not the operation start condition is satisfied based on the information regarding the usage status of the device, and if it is determined that the operation start condition is satisfied, the control means activates the inspection notification means. Generally, the case where the device needs to be inspected is the case where the integrated operation time of the device is long or the total number of times of use is large. By determining whether or not the operation start condition is satisfied based on the information, the inspection notification means can be activated when the device needs to be inspected. Further, the information regarding the usage status of the device is stored in, for example, a storage unit of the control means, or can be acquired by an appropriate communication means, and can be acquired without providing a new sensor or the like. Therefore, the user can know the necessity of inspection of the device while suppressing the cost without adding a new sensor or the like.
Further, according to the above-mentioned feature configuration, when determining whether or not the operation start condition is satisfied, the device is used because it is based on the internal temperature measured by the internal temperature measuring means in addition to the information on the usage status of the device. It is possible to more accurately determine whether or not the operation start condition is satisfied, as compared with the case where the determination is based only on the information about the situation. In addition, the user can know whether or not the device needs to be inspected while suppressing the cost without providing a new sensor or the like which has not existed in the past.

Further, the further characteristic configuration of the heating device according to the present invention further includes a filter cleaning notification means for notifying the necessity of cleaning of the filter.
The control means is
It is determined whether or not the internal temperature measured by the internal temperature measuring means has reached the preset filter cleaning notification means operating temperature, and it is determined that the measured internal temperature has reached the filter cleaning notification means operating temperature. In that case, the filter cleaning notification means is activated to activate the filter cleaning notification means.
The inspection notification means operating temperature is higher than the filter cleaning notification means operating temperature.

According to the above-mentioned feature configuration, the control means determines whether or not the internal temperature of the housing has reached the filter cleaning notification means operating temperature, and if it is determined that the temperature has reached the filter cleaning notification means, the filter cleaning notification means is activated. The user can know the necessity of cleaning the filter by checking the operating status of the filter cleaning notification means.

Further, in the above characteristic configuration, the operating temperature of the inspection notification means is higher than the operating temperature of the filter cleaning notification means. Therefore, according to the above-mentioned feature configuration, the internal temperature of the housing is inspected and notified while the filter cleaning notification means is operating even though the user confirms the operation status of the filter notification means and cleans the filter. When the operating temperature of the means is reached (that is, when the temperature inside the housing rises due to the accumulation of dust in the housing), the control means activates the inspection notification means for inspection by the user. It is possible to check the operating status of the notification means and know whether or not the device needs to be inspected.

It is a schematic block diagram of the heating apparatus which concerns on 1st Embodiment. It is a figure which shows the structural example of the operation reception part which concerns on 1st Embodiment. It is a functional block diagram of the heating device which concerns on 1st Embodiment. It is a flowchart explaining the heating operation of 1st Embodiment. It is a graph explaining the heating operation of 1st Embodiment. It is a flowchart explaining the heating operation of 2nd Embodiment. It is a graph explaining the heating operation of the 2nd Embodiment. It is a graph for explaining a problem. It is a graph for explaining a problem. It is a graph for explaining a problem.

[First Embodiment]
Hereinafter, the heating device 100 of the first embodiment will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram of the heating device 100 of the first embodiment. Specifically, FIG. 1A is a front perspective view showing an arrangement state of main components of the heating device 100, and FIG. 1B is a cross-sectional view of the heating device 100 as viewed from a side portion. As shown in the figure, the heating device 100 includes a combustor (an example of "combustion means") 20 for burning fuel and combustion inside a housing 10 having a suction port 70 for sucking air and an outlet 72 for blowing air. The fuel amount adjusting means F for adjusting the amount of fuel supplied to the vessel 20, the air intake into the housing 10 through the suction port 70, and the air blowout from the housing 10 through the outlet 72. A convection fan 40 (an example of "air flow means") for flowing air so as to perform the operation, and a control means 80 for controlling the operation are provided, and the air sucked into the housing 10 from the suction port 70 is taken into the housing 10 by the combustor 20. It is a device (gas fan heater) configured to raise the temperature of air by mixing it with combustion exhaust gas and blow out the raised air from the outlet 72 to the space to be heated. In addition, the heating device 100 includes an indoor temperature sensor 1 that measures the temperature of the air sucked into the housing 10 from the suction port 70, and a main body internal temperature sensor 2 that measures the internal temperature of the housing 10 (“internal temperature measurement”). An example of "means") and a driving operation receiving unit 50 that receives instructions regarding driving from the user.

The housing 10 of the heating device 100 is provided with a suction port 70 on the back surface for taking in outside air as combustion air A, and an outlet on the front surface for blowing out a mixed gas of combustion exhaust gas and air as warm air. 72 is provided. Further, an air filter 71 for capturing dust is set on the outside of the suction port 70.

The combustor 20 burns the fuel gas G together with the combustion air A. Specifically, a fuel gas flow path 24 for guiding the fuel gas G is continuously connected to the combustor 20, and a first electromagnetic wave that stops or allows the flow of the fuel gas G is connected to the fuel gas flow path 24. A valve 26a and a second electromagnetic valve 26b, a proportional valve 25 capable of adjusting the flow rate of the fuel gas G, and an injection nozzle 23 for injecting the fuel gas G toward the combustor 20 are provided in order from the upstream side to the downstream side. Has been done. Of these, the first solenoid valve 26a, the second solenoid valve 26b, and the proportional valve 25 function as fuel amount adjusting means F for adjusting the amount of fuel supplied to the combustor 20. The reason why the two solenoid valves (first solenoid valve 26a and 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 flow path 24. be. In addition, the combustor 20 can detect the extinguishing of the flame by detecting the igniter 21 that ignites the mixture of the fuel gas G guided to the combustion chamber 22 and the combustion air A and the formed flame. It is equipped with a flame sensor 4.

The convection fan 40 as an air flow means of the present invention includes a cross flow fan 41 having a plurality of runners 41a and a fan drive motor 42 for rotating the cross flow fan 41 in the circumferential direction. The fan drive motor 42 rotates the cross-flow fan 41, so that outside air is taken into the inside of the housing 10 from the suction port 70. Then, a part of the air sucked into the housing 10 is guided to the combustion chamber 22 of the combustor 20 as the combustion air A, and the remaining air flows around the combustion chamber 22 of the combustor 20. It is mixed with combustion exhaust gas. As a result, the temperature of the air sucked into the housing 10 from the suction port 70 is raised, and the air is blown out from the outlet 72 to the outside of the housing 10.

On the back surface of the housing 10, an indoor temperature sensor 1 that can measure the temperature of the ambient air, that is, can measure the temperature of the air in the room where the heating device 100 is used is provided.

FIG. 2 is a diagram showing a configuration example of the operation reception unit 50 of the first embodiment, and FIG. 3 is a functional block diagram of the heating device 100 of the first embodiment.

The operation reception unit 50 is provided on the top surface of the housing 10 and receives instructions regarding operation from the user. The operation reception unit 50 has an eco-operation switch S1, a good morning timer switch S2, a good night timer switch S3, and a temperature / time setting switch (temperature setting switch) S4 (upward switch S4a) as operation switches operated by the user or the like. , Downward switch S4b) and run / stop switch S5. In addition, the operation reception unit 50 has an eco-operation lamp 51 that is lit during the execution of the eco-operation and a good morning timer lamp 52 that is lit during the setting of the good morning timer as a display unit indicating the state of the heating device 100. , The good night timer lamp 53 that is lit while the good night timer is set, and the filter cleaning lamp that is lit to notify the user of the clogging of the filter provided in the suction port 70 (of the "filter cleaning notification means"). Example) 54, an inspection lamp (an example of "inspection notification means") 55 that blinks to notify the user that the device needs to be inspected, and an operation that is lit when the operation is being performed. It has a status display lamp 56, a set room temperature display unit 57 that displays numbers, characters, symbols, etc. that represent the set room temperature, etc., and a current room temperature display unit 58 that displays numbers, characters, symbols, etc. that represent the current room temperature, etc.

The run / stop switch S5 is a switch for instructing the start and stop of the operation. When the user presses the operation / stop switch S5 while the heating device 100 is in the stopped state, the control means 80 accepts the operation as an instruction to start the operation and turns on the operation status display lamp 56. Further, when the user presses the operation / stop switch S5 while the heating device 100 is in the operating state, the control means 80 accepts the operation as an instruction to stop the operation and displays the operation status display lamp 56. Turn off the lights.

The control means 80 is a device configured by using an electric circuit unit having an arithmetic processing function such as a microcomputer and an information storage function such as a semiconductor memory, and when receiving an execution instruction of operation in a normal mode. The minimum is based on the temperature difference between the air temperature measured by the indoor temperature sensor 1 and the set target temperature so that the air temperature measured by the indoor temperature sensor 1 as the suction air temperature measuring means becomes 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 supply fuel amount and the maximum supply fuel amount, and the target supply fuel amount is transferred to the combustor 20 by the fuel amount adjusting means F. Supply. In the present embodiment, the proportional valve 25 constituting the fuel amount adjusting means F is a stepwise proportional valve that gradually changes the valve opening degree corresponding to the amount of fuel supplied to the combustor 20. Then, the control means 80 gradually changes the amount of fuel supplied to the combustor 20 by gradually changing the valve opening degree of the proportional valve 25. In the following, the valve opening degree of the proportional valve 25 is one step (as the 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). An example will be described in which there are a total of 12 stages from (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 degree is one stage corresponds to 0.76 kW in heating capacity. Then, as the number of steps of the valve opening increases, the amount of fuel supplied to the combustor 20 (heating capacity) increases. Further, the control means 80 controls the operating state of the convection fan 40 in order to supply air to the combustor 20 according 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 by operating the temperature / time setting switch (temperature setting switch) S4. For example, the control means 80 displays the set target temperature or the initial value input by the user on the set room temperature display unit 57 when the operation is performed in the normal mode. Then, each time the user presses the upward switch S4a, the display value of the temperature is sequentially increased and changed, and each time the user presses and operates the downward switch S4b, the displayed value of the temperature is sequentially decreased and changed.

For example, the user can set the temperature from 12 ° C to 26 ° C as the setting target temperature in the normal mode in 1 ° C increments, and at this time, the temperature currently measured by the room temperature sensor 1 on the room temperature display unit 58. Is displayed. In addition, the user can set "L (low)" as the setting state corresponding to the set temperature lower than 12 ° C, and "H (high)" as the setting state corresponding to the set temperature higher than 26 ° C. Can be set. For example, when "L (low)" is set, the set temperature becomes a low temperature such as 10 ° C, and when "H (high)" is set, the set temperature becomes a high temperature such as 45 ° C. .. These setting states are sequentially changed step by step each time the user presses the upward switch S4a and the downward switch S4b.

The eco-operation switch S1 is a switch for instructing the execution of operation that relatively reduces the amount of fuel consumed by the heating device 100. When the user "turns on" the eco-driving switch S1, the control means 80 accepts the operation as an execution instruction for eco-driving. For example, when the user presses and operates the eco-driving switch S1, the control means 80 turns on the eco-driving lamp 51 and starts the operation in the eco-driving mode. In the operation in this eco-operation mode, the control means 80 operates at the set target temperature for 30 minutes when the indoor temperature measured by the indoor temperature sensor 1 rises to the set target temperature while operating in the normal mode. After that, the operation in the normal mode is continued in a state where the target temperature in the 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 is operated for another 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 1 ° C. lower than the set target temperature), the actual operation control is further controlled. Lower the set temperature by 1 ° C. In this way, the fuel cost can be saved by gradually lowering the set room temperature without significantly impairing the sensible temperature.

The good morning timer switch S2 is a switch for making a reservation for starting operation. When the user "turns on" the good morning timer switch S2, the control means 80 accepts the operation as a reservation instruction for starting the operation of the heating device 100 which is currently stopped. For example, when the user “turns on” the good morning timer switch S2, the control means 80 turns on the good morning timer lamp 52 and displays the set room temperature display unit 57 with a number (initial value) indicating how many hours later the operation will start. ) Is displayed. Then, the control means 80 increases the displayed time in response to the user pressing the upward switch S4a of the temperature / time setting switch S4, or the control means 80 downwards of the temperature / time setting switch S4. By reducing the displayed time in response to the user pressing the switch S4b, the displayed time is set as the remaining time until the start of operation.

The good night timer switch S3 is a switch for making a reservation for stopping operation. When the user "turns on" the good night timer switch S3, the control means 80 accepts the operation as a reservation instruction for stopping the operation of the heating device 100 currently in operation. For example, when the user "turns on" the good night timer switch S3, the control means 80 turns on the good night timer lamp 53, and the set room temperature display unit 57 shows a number (initial value) indicating how many minutes later the operation will be stopped. ) Is displayed. Then, the control means 80 increases the displayed time in response to the user pressing the upward switch S4a of the temperature / time setting switch S4, or the control means 80 downwards of the temperature / time setting switch S4. By reducing the displayed time in response to the user pressing the switch S4b, the displayed time is set as the remaining time until the operation is stopped. However, the time that can be set by this good night timer is limited to, for example, 60 minutes.

An internal temperature sensor 2 for measuring the internal temperature is provided inside the housing 10, and in the present embodiment, the internal temperature sensor 2 is located downstream of the combustor 20 and burns. After the exhaust gas and air are mixed, the temperature at the part where the mixed gas flows is measured.

In the heating device 100 according to the present embodiment, the air filter 71 is clogged and the amount of air sucked from the suction port 70 is reduced, or dust that cannot be completely removed by the air filter 71 invades the housing 10. By adhering to and accumulating on the surface of the runner 41a of the cross flow fan 41, the air flow in the housing 10 deteriorates, the temperature inside the housing 10 rises to an abnormally high temperature range, and the device fails. In some cases.

Therefore, in the heating device 100 of the present embodiment, the control means 80 reaches the first threshold value (an example of "filter cleaning notification means operating temperature") in which the measured temperature of the temperature sensor 2 for the main body is lower than the abnormally high temperature range. When it is determined that the filter is present, the filter cleaning lamp 54 is turned on. As a result, the user can know that the filter needs to be cleaned by checking the lighting state of the filter cleaning lamp 54. Further, the control means 80 performs various controls necessary for reducing the maximum combustion amount of the combustor 20 at the same time as the filter cleaning lamp 54 is turned on. Further, the control means 80 stops the combustor 20 when it is determined that the measured temperature of the temperature sensor 2 for internal use of the main body reaches the second threshold value higher than the first threshold value and lower than the abnormally high temperature range. Control is performed, and an error number notifying the user that such control has been performed is currently displayed on the room temperature display unit 58. As a result, the operation is stopped before the inside of the housing 10 reaches the abnormally high temperature region, the failure of the device is prevented, and the user can know the reason why the operation is stopped by checking the error number. Can be done. The first threshold value and the second threshold value can be appropriately changed for each combustion amount of the combustor 20, and are set to relatively high values when the combustion amount is large and relative when the combustion amount is small. Can be set to a low value.

Further, in the storage unit (not shown) included in the control means 80, the cumulative operation time of the heating device 100, the cumulative number of times of use (an example of "information on the usage status of the device"), the cumulative number of lightings of the filter cleaning lamp 54, and the total number of times of lighting are stored. The total lighting time (an example of "information on the operating status of the filter cleaning notification means") is stored. Then, in the present embodiment, the control means 80 is the inspection lamp 55 based on the integrated operation time of the heating device 100 and the integrated lighting number of the filter cleaning lamp 54 (an example of the “integrated operation number” of the present invention). It is determined whether or not the blinking start condition (an example of the "operation start condition" of the present invention) is satisfied, and if it is determined that the condition is satisfied, the inspection lamp 55 is blinked. As a result, the user can know that the device needs to be inspected by confirming that the inspection lamp 55 is blinking.

In the present embodiment, it is determined that the blinking start condition is satisfied when the integrated operating time reaches a predetermined integrated operating time (9600 hours in this example), and the integrated lighting number of the filter cleaning lamp 54 is set to a predetermined value. This is the case when the total number of lightings (5 times in this example) is reached. The set integrated operation time and the set integrated lighting number can be set as appropriate. The total number of lightings is not limited to five, and may be at least once. Further, the above "9600 hours" means that dust that could not be completely removed by the air filter 71 accumulates in the housing 10, and as a result, the temperature inside the housing 10 rises to a temperature equal to or higher than the first threshold value. Since it is known that about 10 years have passed by the time it reaches such a state, it is assumed that it is used for 8 hours a day as 30 days a month for 4 months in winter. It is a value calculated by.

Further, in the control means 80, when the user cleans the air filter 71 while the inspection lamp 55 is blinking and the filter cleaning lamp 54 is turned off, the inspection lamp 55 is turned off and the combustor 20 is turned off. Performs various controls necessary to restore the maximum combustion amount of.

Next, the operation control of the heating device 100 will be described below with reference to FIGS. 4 and 5. Note that FIG. 4 is a flowchart illustrating the heating operation of the first embodiment. Further, FIG. 5 is a graph for explaining the heating operation of the first embodiment, in which FIG. 5A shows the relationship between the operation time and the room temperature, and FIG. 5B shows the relationship between the operation time and the temperature inside the housing. , (C) represent the relationship between the operating time and the amount of combustion.

When the operation / stop switch S5 is "on", the control means 80 performs an operation start process. When the heating device 100 is switched from the stopped state to the operating state in this operation start process, the control means 80 opens the first solenoid valve 26a and the second solenoid valve 26b, and opens the proportional valve 25 at a predetermined opening degree. Is set to, and 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 drive motor 42 to operate the convection fan 40, guides the combustion air A to the combustion chamber 22, and then uses the igniter 21 to guide the fuel gas G and the combustion air. Ignite the mixed gas with A and burn it.

Next, in step # 10, the control means 80 determines whether or not the measured temperature of the main body internal temperature sensor 2 is lower than the first threshold value, and if the measured temperature is lower than the first threshold value, step # 11. In the normal mode operation with the maximum combustion amount (4.07 kW in this example), if the measured temperature reaches the first threshold value, the process proceeds to step # 12 and the filter cleaning lamp 54 is turned on. Let me.

In step # 12, the control means 80 turns on the filter cleaning lamp 54 and shifts to step # 13, and in step # 13, the control means 80 controls various controls for reducing the maximum combustion amount of the combustor 20. Is performed, and the process proceeds to step # 14. As a result, as shown in FIG. 5, the filter cleaning lamp 54 is turned on, and the maximum combustion amount of the combustor 20 is reduced. In the present embodiment, the maximum combustion amount is reduced from 4.07 kW to 2.87 kW (about 30% reduction), but the present invention is not limited to this.

Next, in step # 14, the control means 80 determines whether or not the integrated operation time of the heating device 100 has reached 9600 hours, and if the integrated operation time has reached 9600 hours, the process # 15 is performed. If the cumulative operation time has not reached 9600 hours, the process proceeds to step # 17.

In step # 15, the control means 80 determines whether or not the cumulative number of lightings of the filter cleaning lamp 54 has reached 5 times, and if the total number of lightings has reached 5 times, the process proceeds to step # 16. If the total number of lightings has not reached 5, the process proceeds to step # 17.

In step # 16, the control means 80 determines that the blinking start condition of the inspection lamp 55 is satisfied, and blinks the inspection lamp 55. As a result, as shown in FIG. 5, the filter cleaning lamp 54 lights up and the inspection lamp 55 blinks. Therefore, the filter cleaning lamp 54 lights up even though the air filter 71 has been cleaned. The user can know that the device needs to be inspected by confirming the blinking of the inspection lamp 55.

In step # 17, the control means 80 determines whether or not the measured temperature of the temperature sensor 2 for internal use of the main body is lower than the second threshold value, and if the measured temperature is lower than the second threshold value, the process proceeds to step # 20. If the measured temperature is equal to or higher than the second threshold value, the process proceeds to step # 18.

In step # 18, the control means 80 stops the operation of the heating device 100 and shifts to step # 19. Then, in step # 19, the control means 80 displays an error number on the room temperature display unit 58 at present, and notifies the user that an error has occurred.

In step # 20, the control means 80 has a total supply fuel amount range (that is, a range of 1 to 12 stages of proportional stages) based on the temperature difference between the air temperature measured by the indoor temperature sensor 1 and the set target temperature. ), The target supply fuel amount to be supplied to the combustor 20 (that is, the number of proportional stages to be set) is determined, and the target supply fuel amount is supplied to the combustor 20 by the fuel amount adjusting means F. As the temperature of the air to be measured is lower than the set target temperature, the temperature adjustment control is performed so that the target supply fuel amount increases (the combustion amount of the combustor 20 increases). In this way, the control means 80 tells the combustor 20 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 heating device 100 is installed) becomes the set target temperature. Since the amount of fuel to be supplied is adjusted and the amount of combustion of the combustor 20 is adjusted, the temperature in the room where the heating device 100 is installed approaches a comfortable state for the user. When the maximum combustion amount of the combustor 20 is reduced in step # 13, the combustor 20 is set so that the combustion amount of the combustor 20 does not exceed the maximum combustion amount after the reduction in the temperature adjustment control. Determine the target amount of fuel to be supplied.

Next, in step # 21, the control means 80 determines whether or not the operation / stop switch S5 has been "turned off", and if not, returns to step # 10 and "turns off". If it is being operated, the operation of the heating device 100 is stopped.

As described above, in the heating device 100 according to the present embodiment, the integrated operating time of the heating device 100 has reached the set integrated operating time, and the integrated lighting number of the filter cleaning lamp 54 has reached the set integrated lighting number. In this case, the inspection lamp 55 can be made to blink. Therefore, the user confirms the blinking of the inspection lamp 55 without installing a new sensor or the like that has never existed in the past, and confirms the blinking of the inspection lamp 55, and the temperature inside the housing 10 reaches the second threshold value for operation. You can know that the equipment needs to be inspected before it stops automatically.

Further, in the heating device 100 according to the present embodiment, in addition to the integrated operation time of the heating device 100, the blinking start condition of the inspection lamp 55 is determined based on the integrated lighting number of the filter cleaning lamp 54. Therefore, if it is not necessary to clean the air filter 71 and it is unlikely that dust is accumulated in the housing 10, it is determined that the blinking start condition is not satisfied and the inspection lamp 55 is not blinked. If the air filter 71 needs to be cleaned and there is a relatively high possibility that dust has accumulated in the housing 10, it is determined that the blinking start condition is satisfied and the inspection lamp 55 is blinked. It is possible to accurately inform the user of the necessity of inspection of the device.

[Second Embodiment]
The heating device 100 according to the second embodiment determines whether or not the integrated operation time of the heating device 100 has reached the set integrated operation time when determining whether or not the blinking start condition of the inspection lamp 55 is satisfied. It differs from the first embodiment in that it is performed based on whether or not the measured temperature of the internal temperature sensor 2 has reached the third threshold value. Hereinafter, the heating device 100 of the second embodiment will be described, but the description of the same configuration as that of the first embodiment will be omitted.

FIG. 6 is a flowchart illustrating a heating operation of the heating device 100 according to the second embodiment. The steps # 30-step # 34 and step # 36-step # 41 in the flowchart shown in FIG. 6 are the same as the steps # 10-step # 14 and step # 16-step # 21 shown in FIG.

In the heating device 100 according to the second embodiment, the control means 80 includes the integrated operation time of the heating device 100 and the measured temperature of the temperature sensor 2 for the main body (an example of "internal temperature measured by the internal temperature measuring means"). Based on the above, it is determined whether or not the blinking start condition of the inspection lamp 55 is satisfied, and if it is determined that the condition is satisfied, the inspection lamp 55 is blinked. The user can know that the device needs to be inspected by confirming that the inspection lamp 55 is blinking.

In the second embodiment, when it is determined that the blinking start condition is satisfied, the integrated operation time reaches a predetermined set integrated operation time (9600 hours in this example), and the temperature sensor 2 for the main body is measured. This is the case where the temperature reaches a third threshold value higher than the first threshold value and lower than the second threshold value (an example of “inspection notification means operating temperature”). As described above, the set integrated operation time can be appropriately set. Further, the third threshold value can be appropriately changed for each combustion amount of the combustor 20, and is set to a relatively high value when the combustion amount is large, and a relatively low value when the combustion amount is small. Can be set to.

Specifically, first, the control means 80 performs an operation start process when the operation / stop switch S5 is "on". The content of this operation start process is the same as that of the first embodiment.

Next, in step # 30, the control means 80 determines whether or not the measured temperature of the temperature sensor 2 for internal use of the main body is lower than the first threshold value, and if the measured temperature is lower than the first threshold value, the control means 80 goes to step # 31. After shifting, the operation in the normal mode is continued at the maximum combustion amount (4.07 kW in this example), and when the measured temperature reaches the first threshold value, the process shifts to step # 32 and the filter cleaning lamp 54 is turned on. ..

In step # 32, the control means 80 turns on the filter cleaning lamp 54 and shifts to step # 33, and in step # 33, the control means 80 reduces the maximum combustion amount of the combustor 20 (from 4.07 kW to 2. Various controls for making 87 kW) are performed, and the process proceeds to step # 34. As a result, as shown in FIG. 7, the filter cleaning lamp 54 is turned on and the maximum combustion amount of the combustor 20 is reduced.

In step # 34, the control means 80 determines whether or not the integrated operating time of the heating device 100 has reached 9600 hours, and if the integrated operating time has reached 9600 hours, the process proceeds to step # 35 and the integrated operation is performed. If the operating time has not reached 9600 hours, the process proceeds to step # 37.

In step # 35, the control means 80 determines whether or not the measured temperature of the temperature sensor 2 for internal use of the main body has reached the third threshold value, and if it is determined that the measured temperature has reached the third threshold value, step # 35. If it is determined that the measurement temperature has not reached the third threshold value, the process proceeds to step 36.

In step # 36, the control means 80 determines that the blinking start condition of the inspection lamp 55 is satisfied, and blinks the inspection lamp 55. As a result, as shown in FIG. 7, the filter cleaning lamp 54 lights up and the inspection lamp 55 blinks. Therefore, when the filter cleaning lamp 54 is lit even though the air filter 71 has been cleaned, the user needs to inspect the device by confirming the blinking of the inspection lamp 55. You can know.

In step # 37, the control means 80 determines whether or not the measured temperature of the temperature sensor 2 for internal use of the main body is lower than the second threshold value, and if the measured temperature is lower than the second threshold value, the process proceeds to step # 40. If the measurement temperature is equal to or higher than the second threshold value, the process proceeds to step # 38.

In step # 38, the control means 80 stops the operation of the heating device 100 and shifts to step # 39. Then, in step # 39, the control means 80 displays an error number on the room temperature display unit 58 at present, and notifies the user that an error has occurred.

In step # 40, the control means 80 performs temperature adjustment control having the same contents as those described in step # 20 of FIG. 4 of the first embodiment. When the maximum combustion amount of the combustor 20 is reduced in step # 33, the combustor 20 is set so that the combustion amount of the combustor 20 does not exceed the maximum combustion amount after the reduction in the temperature adjustment control. Determine the target amount of fuel to be supplied.

Next, in step # 41, the control means 80 determines whether or not the operation / stop switch S5 has been “turned off”, and if not, returns to step # 30 and “turns off”. If it is being operated, the operation of the heating device 100 is stopped.

As described above, even in the heating device 100 of the second embodiment, the integrated operating time of the heating device 100 has reached the set integrated operating time, and the measured temperature of the temperature sensor 2 for the main body has reached the third threshold value. In this case, the inspection lamp 55 can be made to blink. Therefore, the user confirms the blinking of the inspection lamp 55 without installing a new sensor or the like which has not been used in the past, while suppressing the cost, and before the temperature inside the housing 10 reaches the second threshold value. Know that the equipment needs to be inspected.

Further, in the heating device 100 according to the present embodiment, when determining the blinking start condition of the inspection lamp 55, in addition to the integrated operation time of the heating device 100, the measured temperature of the internal temperature sensor 2 of the main body and the second threshold value are higher than the second threshold value. It is based on the relationship with the three thresholds. Therefore, as in the case of the first embodiment, the air filter 71 needs to be cleaned, and the blinking start condition is satisfied only when there is a relatively high possibility that dust is accumulated in the housing 10. The inspection lamp 55 can be made to blink by determining that the lamp 55 has been turned on, and the total number of times of lighting and the like can be determined as compared with the case of determining whether or not the blinking start condition is satisfied based on the total number of times of lighting of the filter cleaning lamp 54. Even if the count is not accurate, it is possible to accurately determine whether or not the blinking start condition is satisfied and blink the inspection lamp 55, so that the user is notified more accurately whether or not the device needs to be inspected. Can be done.

[Another Embodiment]
[1]
In each of the above embodiments, the configuration of the heating device 100 has been described with reference to specific examples, but the configuration can be changed as appropriate. In the first embodiment, an example based on the integrated operation time of the heating device 100 and the integrated lighting number of the filter cleaning lamp 54 when determining the blinking start condition of the inspection lamp 55 has been described, but the present invention is limited to this. It is not something that can be done. For example, the cumulative number of uses of the heating device 100 is used instead of the cumulative operation time, and the fact that the cumulative number of uses reaches the set cumulative number of uses is one condition for determining that the blinking start condition is satisfied. can do. The total number of times the heating device 100 has been used varies greatly depending on whether or not the operation is frequently turned on and off. Therefore, if this cumulative number of uses is used to determine the blinking start condition of the inspection lamp 55, it can be determined that the lighting start condition is satisfied even though the device is not actually used enough to require inspection. There is sex. Therefore, when determining the blinking start condition of the inspection lamp 55, it is preferable to use the cumulative number of times of use of the heating device 100. Further, the integrated lighting time of the filter cleaning lamp 54 (an example of "integrated operating time") is used instead of the integrated lighting number, and the blinking start condition is satisfied that the integrated lighting time has reached the set integrated lighting time. It can also be one of the conditions for determining that there is.

[2]
In each of the above embodiments, in addition to the integrated operation time of the heating device 100 (information on the usage status of the device), the integrated lighting count of the filter cleaning lamp 54 (information on the operating status of the filter cleaning notification means) or the temperature sensor for the inside of the main body. An example of determining the blinking start condition of the inspection lamp 55 based on the relationship between the measurement result of 2 and the third threshold has been described, but the present invention is not limited to this, and is based only on the information on the usage status of the device. The condition for starting blinking of the inspection lamp 55 may be determined. The usage status of the heating device 100 differs depending on whether the heating device 100 is used in an environment where a relatively large amount of dust is present or when the heating device 100 is used in a clean environment where there is relatively little dust. Even if the total operating time and the total number of times of use are the same, there will be a difference in the amount of dust accumulated in the housing. Therefore, even if the device needs to be inspected in the former case, the device does not necessarily have to be inspected in the latter case. It may not be necessary to inspect, and if the blinking start condition is determined based only on the information on the usage status of the device, it is determined that the blinking start condition is satisfied even if the device does not need to be inspected, and the device is determined. It may not be possible for the user to know exactly whether or not the inspection is necessary. Therefore, whether or not the blinking start condition is satisfied based on the information on the usage status of the device, the operation status of the filter cleaning notification means, or the relationship between the measurement result of the temperature sensor 2 for the main body and the third threshold value. It is preferable to determine whether or not.

[3]
In each of the above embodiments, when the filter cleaning lamp 54 is turned off, the maximum combustion amount of the combustor 20 is restored and the inspection lamp 55 is turned off, but the present invention is not limited to this. For example, once the inspection lamp 55 is blinked, even if the user cleans the air filter 71 and the filter cleaning lamp 54 is turned off, the operator who inspects the device cancels the blinking of the inspection lamp 55. Until this is done, the inspection lamp 55 may be blinked and the heating operation may be performed with the maximum combustion amount of the combustor 20 reduced.

[4]
In each of the above embodiments, the maximum combustion amount of the combustor 20 is reduced at the same time as the filter cleaning lamp is turned on, but the maximum combustion amount of the combustor 20 may not be reduced.

[5]
In each of the above embodiments, an example of informing the user of the necessity of cleaning the filter and the necessity of inspecting the device by turning on the filter cleaning lamp and blinking the inspection lamp has been described, but the inspection lamp may be turned on or the filter may be turned on. Instead of the cleaning lamp or the inspection lamp, a notification means that emits a sound may be provided so that the user can know whether the filter needs to be cleaned or the device needs to be inspected depending on the operating status of the notification means.

The configuration disclosed in the above embodiment (including another embodiment, the same shall apply hereinafter) can be applied in combination with the configuration disclosed in other embodiments as long as there is no contradiction. The embodiments disclosed in the present specification are examples, and the embodiments of the present invention are not limited thereto, and can be appropriately modified without departing from the object of the present invention.

INDUSTRIAL APPLICABILITY The present invention can be used for a heating device that can notify the user of the necessity of inspection of the device while suppressing the cost without requiring the addition of a new sensor or the like.

1 Indoor temperature sensor 2 Internal temperature sensor (internal temperature measuring means)
10 Housing 20 Combustor (combustion means)
40 Convection fan (air flow means)
50 Operation reception unit 54 Filter cleaning lamp (filter cleaning notification means)
55 Inspection lamp (inspection notification means)
70 Suction port 71 Air filter 72 Outlet 80 Control means 100 Heating device

Claims (2)

Inside the housing having a suction port and an outlet, a combustion means that burns fuel and the combustion exhaust gas generated by the combustion means are sent from the outlet to the heating target space together with the air sucked from the suction port through the filter. A heating device equipped with an air flow means for blowing out,
Control means to control the operation and
An inspection notification means for notifying the necessity of inspection regarding the heating device , and
It is provided with an internal temperature measuring means for measuring the internal temperature of the housing .
The control means is
Based on the integrated operation time of the heating device, which is information on the usage status of the heating device, and the internal temperature measured by the internal temperature measuring means, it is determined whether or not the operation start condition of the inspection notification means is satisfied. Then, when the integrated operation time reaches a preset time and the internal temperature measured by the internal temperature measuring means reaches the preset inspection notification means operating temperature, the operation start condition is satisfied. A heating device that determines and performs processing including operating the inspection notification means. Further equipped with a filter cleaning notification means for notifying the necessity of cleaning of the filter,
The control means is
It is determined whether or not the internal temperature measured by the internal temperature measuring means has reached the preset filter cleaning notification means operating temperature, and it is determined that the measured internal temperature has reached the filter cleaning notification means operating temperature. In that case, the filter cleaning notification means is activated to activate the filter cleaning notification means.
The heating device according to claim 1 , wherein the inspection notification means operating temperature is higher than the filter cleaning notification means operating temperature.

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