US20150136861A1 - Room heater - Google Patents
Room heater Download PDFInfo
- Publication number
- US20150136861A1 US20150136861A1 US14/546,572 US201414546572A US2015136861A1 US 20150136861 A1 US20150136861 A1 US 20150136861A1 US 201414546572 A US201414546572 A US 201414546572A US 2015136861 A1 US2015136861 A1 US 2015136861A1
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- US
- United States
- Prior art keywords
- temperature
- room
- command
- detected
- thermostat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 239000000567 combustion gas Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2064—Arrangement or mounting of control or safety devices for air heaters
- F24H9/2085—Arrangement or mounting of control or safety devices for air heaters using fluid fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/204—Temperature of the air before heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/254—Room temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
- F24H15/305—Control of valves
- F24H15/31—Control of valves of valves having only one inlet port and one outlet port, e.g. flow rate regulating valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
- F24H15/345—Control of fans, e.g. on-off control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
- F24H15/355—Control of heat-generating means in heaters
- F24H15/36—Control of heat-generating means in heaters of burners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/40—Control of fluid heaters characterised by the type of controllers
- F24H15/486—Control of fluid heaters characterised by the type of controllers using timers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/06—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators
- F24H3/065—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators using fluid fuel
Definitions
- the present invention relates to a room heater including a room-temperature detecting means (a detector which detects a room temperature) and a control means (a controller) configured to control temperature by adjusting an amount of heat to be provided to room air according to a difference between a detected temperature detected by the room-temperature detecting means and a predetermined set temperature.
- a room-temperature detecting means a detector which detects a room temperature
- a control means a controller
- JP 2009-150591A discloses a room heater in which a control means is coupled to a thermostat that is also coupled to other appliances.
- the thermostat includes a second room-temperature detecting means provided independent of a first room-temperature detecting means of the room heater.
- the thermostat is configured to output an on-command when a detected temperature detected by the second room-temperature detecting means becomes a predetermined first reference temperature or below, and to output an off-command when the detected temperature detected by the second room-temperature detecting means becomes such a predetermined second reference temperature or above, or when the thermostat is manually operated to be switched off, the second reference temperature being set higher than the first reference temperature.
- the control means On receiving an on-command from the thermostat, the control means operates the room heater, and on receiving an off-command from the thermostat, the control means stops the room heater.
- the room heater disclosed in JP 2009-150591A is further configured to update a set temperature of temperature control when an on-command from the thermostat is received again according to a difference between a detected temperature detected by the first room-temperature detecting means of the room heater on receiving the off-command from the thermostat and the set temperature.
- the control means of the room heater can only receive the on-command and the off-command from the thermostat and cannot recognize the first reference temperature and the second reference temperature set in the thermostat. Therefore, in order to prevent the temperature control from being carried out by the set temperature that has already been set without relation to a room temperature even if the temperature of the room air has already been elevated, e.g., to the second reference temperature when the off-command was outputted from the thermostat, the above-described known room heater is arranged to update the set temperature.
- the set temperature of the room heater becomes lower than the second reference temperature.
- the above-described known room heater cannot recognize the second reference temperature of the thermostat, and the set temperature cannot be changed when the room heater is operating. Consequently, the room temperature is hard to rise to the second reference temperature even after a long period of time has passed after receiving the on-command from the thermostat. Therefore, there will continue a state in which the control means receives no off-command from the thermostat. Further, if the detected temperature detected by the first room-temperature detecting means of the room heater reaches the set temperature, the control means of the room heater controls temperature by reducing an amount of heat to be provided to the room air.
- the room temperature is hard to rise to the second reference temperature even after the temperature detected by the first room-temperature detecting means has been at the set temperature or higher for a long period of time.
- the control means receives no off-command from the thermostat. That is, even when a user intends to warm the room by raising the second reference temperature of the thermostat, there will continue a state in which the room temperature will not rise to the second reference temperature.
- an object of the present invention is to provide a room heater which is configured to raise the room temperature close to a second reference temperature of the thermostat when the user changes to raise the second reference temperature.
- a room heater comprising: a first room-temperature detecting means; and a control means configured to control temperature by adjusting an amount of heat to be provided to room air according to a difference between a detected temperature detected by the first room-temperature detecting means and a predetermined set temperature.
- a thermostat including a second room-temperature detecting means provided separately from the first room-temperature detecting means of the room heater is coupled to the control means.
- the thermostat is configured: to output an on-command when a detected temperature detected by the second room-temperature detecting means becomes a predetermined first reference temperature or below; and to output an off-command when a detected temperature detected by the second room-temperature detecting means becomes a predetermined second reference temperature or above, the second reference temperature being set higher than the first reference temperature.
- the control means is configured to operate the room heater on receiving an on-command from the thermostat and to stop the room heater on receiving an off-command from the thermostat.
- the control means carries out temperature-raise control by raising a set temperature by a predetermined value or by increasing the amount of heat to be provided to room air by a predetermined value when the control means does not receive the off-command by passing of a first predetermined period of time after having received the on-command from the thermostat or when the detected temperature detected by the first room-temperature detecting means of the room heater has been at the set temperature or higher without receiving the off-command for a second predetermined period of time.
- the control means when the user changes to raise the second reference temperature of the thermostat, and when the control means does not receive the off-command by passing of the first predetermined period of time after having received the on-command from the thermostat or when the state in which the detected temperature detected by the first room-temperature detecting means of the room heater has been at the set temperature or higher without receiving an off-command at the set temperature or higher without receiving an off-command for the second predetermined period of time, the control means carries out the temperature-raise control by raising the set temperature by the predetermined value or by increasing the amount of heat to be provided to the room air by the predetermined value to enable to raise the room temperature. Therefore, when the user changes to raise the second reference temperature of the thermostat, the room temperature can be raised close to the second reference temperature.
- This invention is preferably configured to carry out temperature-raise control again when no off-command is received by passing of a third predetermined period of time after a previous temperature-raise control.
- the set temperature can be raised stepwise or the amount of heat to be provided to the room air can be increased stepwise, thereby raising the room temperature to the second reference temperature.
- FIG. 1 illustrates a configuration of a room heater according to an embodiment of this invention
- FIG. 2 is a flow diagram illustrating a control flow of the room heater in FIG. 1 .
- FIG. 1 illustrates a room heater 1 according to an embodiment of this invention.
- the room heater 1 contains therein: a combustion casing 2 having therein a burner 21 ; and a heat exchanger 3 in which combustion gas from a burner 21 flows.
- a supply passage 22 for supplying a fuel gas to the burner 21 has interposed therein: a solenoid valve 22 a for opening/closing the supply passage 22 ; and a proportional valve 22 b for varying the flow rate of the fuel gas.
- air is supplied from an inlet passage 23 on an upstream of the combustion casing 2 , and combustion gas is exhausted to an exhaust passage 32 via an exhaust fan 31 provided on a downstream of the heat exchanger 3 .
- the room heater 1 includes: a first room-temperature detecting means 6 for detecting the temperature of the room air sucked from the air inlet 51 ; and a controller 7 which is generically called a control means to control the temperature by adjusting the proportional valve 22 b to adjust an amount of heat to be provided to the room air according to a difference between the detected temperature detected by the first room-temperature detecting means 6 and a predetermined set temperature.
- the controller 7 has coupled thereto a thermostat 8 .
- the thermostat 8 has a second room-temperature detecting means 81 which is different from the first room-temperature detecting means 6 in the room heater 1 (this room-temperature detecting means 6 is also called “a first room-temperature detecting means” to distinguish between the second room-temperature detecting means 81 ).
- the thermostat 8 outputs an on-command when the detected temperature detected by the second room-temperature detecting means 81 becomes a predetermined first reference temperature or lower, and outputs an off-command when the detected temperature detected by the second room-temperature detecting means 81 becomes a predetermined second reference temperature or higher, or when the thermostat 8 is manually operated to be switched off.
- the second reference temperature is set higher than the first reference temperature.
- the controller 7 On receiving an on-command from the thermostat 8 , the controller 7 starts the room heater 1 by opening the solenoid valve 22 a and by operating the exhaust fan 31 and the convection fan 4 . On receiving an off-command from the thermostat 8 , the controller 7 stops the room heater 1 by closing the solenoid valve 22 a and by stopping the operation of the exhaust fan 31 and the convection fan 4 . Further, the thermostat 8 is so arranged that the first reference temperature and the second reference temperature can be changed.
- the user changes to raise the second reference temperature in the thermostat 8 so that the set temperature of the room heater 1 becomes lower than the second reference temperature. It is impossible on the side of the room heater 1 to recognize the second reference temperature of the thermostat 8 . Therefore, even after a lapse of a long period of time on receiving of the on-command from the thermostat 8 , the room temperature may not be raised to the second reference temperature. Consequently, there will continue a state in which the off-command is not received from the thermostat 8 .
- the controller 7 of the room heater 1 controls the temperature by reducing the amount of heat to be provided to the room air.
- the room temperature may not be raised to the second reference temperature, and the controller 7 receives no off-command from the thermostat 8 . That is, even if the user intends to warm the room by raising the second reference temperature of the thermostat 8 , there will continue the state in which the room temperature does not rise to the second reference temperature.
- the embodiment of this invention is so arranged that the controller 7 carries out the temperature-raise control by raising a set temperature by a predetermined value or by increasing the amount of heat to be provided to the room air by a predetermined value when: the controller 7 does not receive the off-command by passing (i.e., by the time of completion) of a first predetermined period of time after having received the on-command from the thermostat 8 ; or when the state in which the detected temperature detected by the first room-temperature detecting means 6 of the room heater 1 is the set temperature or above has continued for a second predetermined period of time without receiving the off-command.
- the controller 7 carries out the temperature-raise control again when no off-command is received by passing of a third predetermined period of time after having carried out the previous temperature-raise control.
- the controller 7 updates a set temperature for controlling temperature on receiving the on-command again according to a difference between a detected temperature detected by the first room-temperature detecting means 6 of the room heater 1 when the off-command from the thermostat 8 is received and the set temperature.
- the control carried out by the room heater 1 will hereinafter be described referring to FIG. 2 .
- Step 1 when, e.g., the user turns on a main power of the room heater 1 , determination is made at STEP 1 whether or not the controller 7 has received the on-command from the thermostat 8 , that is, whether or not the detected temperature detected by the second room-temperature detecting means 81 of the thermostat 8 has become the predetermined first reference temperature or lower.
- the operation of the room heater 1 is started at STEP 2 .
- the control of the temperature by adjusting the amount of heat to be provided to the room air is then carried out according to the difference between the detected temperature Tr detected by the first room-temperature detecting means 6 and the predetermined set temperature Ts.
- a timing operation with a timer A equipped in the controller 7 is started at STEP 3 (timer-A-start).
- the controller 7 determines whether or not the first predetermined period of time (e.g., 20 minutes) has passed since the timer-A-start and whether or not the detected temperature Tr detected by the first room-temperature detecting means 6 of the room heater 1 is at the set temperature Ts or higher and that state has continued for the second predetermined period of time (e.g., 10 minutes). Until the first predetermined period of time passes or until the state Tr ⁇ Ts continues for the second predetermined period of time, the controller 7 determines at STEP 5 whether or not the off-command from the thermostat 8 has been received, that is, whether or not the detected temperature detected by the second room-temperature detecting means 81 of the thermostat 8 has become the predetermined second reference temperature or higher.
- the first predetermined period of time e.g. 20 minutes
- the room heater 1 is stopped at STEP 6 .
- the set temperature Ts which is used for controlling temperature when the on-command is received again, is updated according to the difference between the detected temperature Tr detected by the first room-temperature detecting means 6 of the room heater 1 when the off-command from the thermostat 8 is received and the set temperature Ts, and then returns to STEP 1 .
- the set temperature Ts is updated, e.g., by adding to the previous set temperature Ts a half of the difference between the detected temperature Tr and the previous set temperature Ts.
- the updating of the set temperature Ts can alternatively be made by adding to the previous set temperature Ts the difference between the detected temperature Tr and the previous set temperature Ts. In other words, the updating can also be made by updating the set temperature Ts to the detected temperature Tr detected by the first room-temperature detecting means 6 when the off-command from the thermostat 8 is received.
- the temperature-raise control will be performed at STEP 8 by raising the set temperature Ts by the predetermined value ⁇ T (e.g., 1° C.).
- ⁇ T e.g. 1° C.
- the second reference temperature of the thermostat 8 is changed to be raised by the user.
- the room temperature can be made closer to the second reference temperature.
- the temperature rise control may be made by increasing the opening degree of the proportional valve 22 b so as to increase the amount of heat to be provided to the room air by a predetermined value, instead of raising the set temperature Ts by the predetermined value ⁇ T. According to this arrangement, in the same manner as described above, the room temperature can be made closer to the second reference temperature.
- a timing operation is started at STEP 9 with a timer B equipped in the controller 7 (timer-B-start).
- the controller 7 determines whether the off-command from the thermostat 8 is received or not, and at STEP 11 , the controller 7 determines whether or not the third predetermined period of time (e.g., 20 minutes) has passed after the timer-B-start. If the controller 7 receives the off-command from the thermostat 8 by passing of the third predetermined period of time, the process proceeds to STEP 6 .
- the third predetermined period of time e.g. 20 minutes
- the process returns to STEP 8 .
- the set temperature Ts can be raised stepwise or the amount of heat to be provided to the room air can be increased stepwise, thereby raising the room temperature to the second reference temperature.
- the first room-temperature detecting means 6 is configured to detect the temperature of the room temperature sucked from the air inlet 51 . It may, however, be so arranged that the room-temperature detecting means may be disposed on an outer surface of the room heater 1 so that the temperature outside the room heater 1 may be detected.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Direct Air Heating By Heater Or Combustion Gas (AREA)
Abstract
A room heater is controlled according to a difference between a detected temperature detected by a first room-temperature detector and a predetermined set temperature. When a detected temperature detected by a second room-temperature detector falls below a first reference temperature, the operation is started on receiving an on-command from a thermostat. When the detected temperature by the second room-temperature detector has raised above a second reference temperature which is set higher than the first reference temperature, the operation is stopped on receiving an off-command from the thermostat. The room heater is controlled to raise a set temperature by a predetermined value if it does not receive the off-command by passing of a first predetermined period of time after having received the on-command or if the detected temperature detected by the first room-temperature detector has been at the set temperature or higher without receiving the off-command for a second predetermined period of time.
Description
- 1. Technical Field
- The present invention relates to a room heater including a room-temperature detecting means (a detector which detects a room temperature) and a control means (a controller) configured to control temperature by adjusting an amount of heat to be provided to room air according to a difference between a detected temperature detected by the room-temperature detecting means and a predetermined set temperature.
- 2. Related Art
- As this kind of room heater, JP 2009-150591A discloses a room heater in which a control means is coupled to a thermostat that is also coupled to other appliances. The thermostat includes a second room-temperature detecting means provided independent of a first room-temperature detecting means of the room heater. The thermostat is configured to output an on-command when a detected temperature detected by the second room-temperature detecting means becomes a predetermined first reference temperature or below, and to output an off-command when the detected temperature detected by the second room-temperature detecting means becomes such a predetermined second reference temperature or above, or when the thermostat is manually operated to be switched off, the second reference temperature being set higher than the first reference temperature. On receiving an on-command from the thermostat, the control means operates the room heater, and on receiving an off-command from the thermostat, the control means stops the room heater. The room heater disclosed in JP 2009-150591A is further configured to update a set temperature of temperature control when an on-command from the thermostat is received again according to a difference between a detected temperature detected by the first room-temperature detecting means of the room heater on receiving the off-command from the thermostat and the set temperature.
- The control means of the room heater can only receive the on-command and the off-command from the thermostat and cannot recognize the first reference temperature and the second reference temperature set in the thermostat. Therefore, in order to prevent the temperature control from being carried out by the set temperature that has already been set without relation to a room temperature even if the temperature of the room air has already been elevated, e.g., to the second reference temperature when the off-command was outputted from the thermostat, the above-described known room heater is arranged to update the set temperature.
- If a user changes to raise the second reference temperature of the thermostat when the room heater is operating, the set temperature of the room heater becomes lower than the second reference temperature. However, the above-described known room heater cannot recognize the second reference temperature of the thermostat, and the set temperature cannot be changed when the room heater is operating. Consequently, the room temperature is hard to rise to the second reference temperature even after a long period of time has passed after receiving the on-command from the thermostat. Therefore, there will continue a state in which the control means receives no off-command from the thermostat. Further, if the detected temperature detected by the first room-temperature detecting means of the room heater reaches the set temperature, the control means of the room heater controls temperature by reducing an amount of heat to be provided to the room air. Therefore, the room temperature is hard to rise to the second reference temperature even after the temperature detected by the first room-temperature detecting means has been at the set temperature or higher for a long period of time. In this manner, the control means receives no off-command from the thermostat. That is, even when a user intends to warm the room by raising the second reference temperature of the thermostat, there will continue a state in which the room temperature will not rise to the second reference temperature.
- In view of the above-described problem, an object of the present invention is to provide a room heater which is configured to raise the room temperature close to a second reference temperature of the thermostat when the user changes to raise the second reference temperature.
- In order to solve the above-described problem, according to this invention, there is provided a room heater comprising: a first room-temperature detecting means; and a control means configured to control temperature by adjusting an amount of heat to be provided to room air according to a difference between a detected temperature detected by the first room-temperature detecting means and a predetermined set temperature. A thermostat including a second room-temperature detecting means provided separately from the first room-temperature detecting means of the room heater is coupled to the control means. The thermostat is configured: to output an on-command when a detected temperature detected by the second room-temperature detecting means becomes a predetermined first reference temperature or below; and to output an off-command when a detected temperature detected by the second room-temperature detecting means becomes a predetermined second reference temperature or above, the second reference temperature being set higher than the first reference temperature. The control means is configured to operate the room heater on receiving an on-command from the thermostat and to stop the room heater on receiving an off-command from the thermostat. The control means carries out temperature-raise control by raising a set temperature by a predetermined value or by increasing the amount of heat to be provided to room air by a predetermined value when the control means does not receive the off-command by passing of a first predetermined period of time after having received the on-command from the thermostat or when the detected temperature detected by the first room-temperature detecting means of the room heater has been at the set temperature or higher without receiving the off-command for a second predetermined period of time.
- According to this invention, when the user changes to raise the second reference temperature of the thermostat, and when the control means does not receive the off-command by passing of the first predetermined period of time after having received the on-command from the thermostat or when the state in which the detected temperature detected by the first room-temperature detecting means of the room heater has been at the set temperature or higher without receiving an off-command at the set temperature or higher without receiving an off-command for the second predetermined period of time, the control means carries out the temperature-raise control by raising the set temperature by the predetermined value or by increasing the amount of heat to be provided to the room air by the predetermined value to enable to raise the room temperature. Therefore, when the user changes to raise the second reference temperature of the thermostat, the room temperature can be raised close to the second reference temperature.
- This invention is preferably configured to carry out temperature-raise control again when no off-command is received by passing of a third predetermined period of time after a previous temperature-raise control. According to this arrangement, the set temperature can be raised stepwise or the amount of heat to be provided to the room air can be increased stepwise, thereby raising the room temperature to the second reference temperature.
-
FIG. 1 illustrates a configuration of a room heater according to an embodiment of this invention; and -
FIG. 2 is a flow diagram illustrating a control flow of the room heater inFIG. 1 . -
FIG. 1 illustrates a room heater 1 according to an embodiment of this invention. The room heater 1 contains therein: acombustion casing 2 having therein aburner 21; and aheat exchanger 3 in which combustion gas from aburner 21 flows. Asupply passage 22 for supplying a fuel gas to theburner 21 has interposed therein: asolenoid valve 22 a for opening/closing thesupply passage 22; and aproportional valve 22 b for varying the flow rate of the fuel gas. In this arrangement, air is supplied from aninlet passage 23 on an upstream of thecombustion casing 2, and combustion gas is exhausted to anexhaust passage 32 via anexhaust fan 31 provided on a downstream of theheat exchanger 3. By operating a convection fan 4 provided above theheat exchanger 3, room air sucked from anair inlet 51 opened in a back face of the room heater 1 is heated by exchanging heat with theheat exchanger 3 and is then blown out of the room heater 1 as warm air from anair outlet 52 opened in a lower part of a front face of the room heater 1. - The room heater 1 includes: a first room-temperature detecting means 6 for detecting the temperature of the room air sucked from the
air inlet 51; and acontroller 7 which is generically called a control means to control the temperature by adjusting theproportional valve 22 b to adjust an amount of heat to be provided to the room air according to a difference between the detected temperature detected by the first room-temperature detecting means 6 and a predetermined set temperature. Thecontroller 7 has coupled thereto athermostat 8. Thethermostat 8 has a second room-temperature detecting means 81 which is different from the first room-temperature detecting means 6 in the room heater 1 (this room-temperature detecting means 6 is also called “a first room-temperature detecting means” to distinguish between the second room-temperature detecting means 81). Thethermostat 8 outputs an on-command when the detected temperature detected by the second room-temperature detecting means 81 becomes a predetermined first reference temperature or lower, and outputs an off-command when the detected temperature detected by the second room-temperature detecting means 81 becomes a predetermined second reference temperature or higher, or when thethermostat 8 is manually operated to be switched off. The second reference temperature is set higher than the first reference temperature. On receiving an on-command from thethermostat 8, thecontroller 7 starts the room heater 1 by opening thesolenoid valve 22 a and by operating theexhaust fan 31 and the convection fan 4. On receiving an off-command from thethermostat 8, thecontroller 7 stops the room heater 1 by closing thesolenoid valve 22 a and by stopping the operation of theexhaust fan 31 and the convection fan 4. Further, thethermostat 8 is so arranged that the first reference temperature and the second reference temperature can be changed. - Suppose that, during the operation of the room heater 1, the user changes to raise the second reference temperature in the
thermostat 8 so that the set temperature of the room heater 1 becomes lower than the second reference temperature. It is impossible on the side of the room heater 1 to recognize the second reference temperature of thethermostat 8. Therefore, even after a lapse of a long period of time on receiving of the on-command from thethermostat 8, the room temperature may not be raised to the second reference temperature. Consequently, there will continue a state in which the off-command is not received from thethermostat 8. When the temperature detected by the first room-temperature detecting means 6 of the room heater 1 reaches the set temperature, thecontroller 7 of the room heater 1 controls the temperature by reducing the amount of heat to be provided to the room air. It follows that, even if a state in which the temperature detected by the first room-temperature detecting means 6 is the set temperature or higher continues for a long period of time, the room temperature may not be raised to the second reference temperature, and thecontroller 7 receives no off-command from thethermostat 8. That is, even if the user intends to warm the room by raising the second reference temperature of thethermostat 8, there will continue the state in which the room temperature does not rise to the second reference temperature. - As a solution, the embodiment of this invention is so arranged that the
controller 7 carries out the temperature-raise control by raising a set temperature by a predetermined value or by increasing the amount of heat to be provided to the room air by a predetermined value when: thecontroller 7 does not receive the off-command by passing (i.e., by the time of completion) of a first predetermined period of time after having received the on-command from thethermostat 8; or when the state in which the detected temperature detected by the first room-temperature detecting means 6 of the room heater 1 is the set temperature or above has continued for a second predetermined period of time without receiving the off-command. Further, thecontroller 7 carries out the temperature-raise control again when no off-command is received by passing of a third predetermined period of time after having carried out the previous temperature-raise control. Thecontroller 7 updates a set temperature for controlling temperature on receiving the on-command again according to a difference between a detected temperature detected by the first room-temperature detecting means 6 of the room heater 1 when the off-command from thethermostat 8 is received and the set temperature. The control carried out by the room heater 1 will hereinafter be described referring toFIG. 2 . - First, when, e.g., the user turns on a main power of the room heater 1, determination is made at STEP 1 whether or not the
controller 7 has received the on-command from thethermostat 8, that is, whether or not the detected temperature detected by the second room-temperature detecting means 81 of thethermostat 8 has become the predetermined first reference temperature or lower. Once thecontroller 7 has received the on-command from thethermostat 8, the operation of the room heater 1 is started atSTEP 2. The control of the temperature by adjusting the amount of heat to be provided to the room air is then carried out according to the difference between the detected temperature Tr detected by the first room-temperature detecting means 6 and the predetermined set temperature Ts. In this manner, when thecontroller 7 starts operating the room heater 1 on receiving the on-command from thethermostat 8, a timing operation with a timer A equipped in thecontroller 7 is started at STEP 3 (timer-A-start). - Then, at STEP 4, the
controller 7 determines whether or not the first predetermined period of time (e.g., 20 minutes) has passed since the timer-A-start and whether or not the detected temperature Tr detected by the first room-temperature detecting means 6 of the room heater 1 is at the set temperature Ts or higher and that state has continued for the second predetermined period of time (e.g., 10 minutes). Until the first predetermined period of time passes or until the state Tr≧Ts continues for the second predetermined period of time, thecontroller 7 determines at STEP 5 whether or not the off-command from thethermostat 8 has been received, that is, whether or not the detected temperature detected by the second room-temperature detecting means 81 of thethermostat 8 has become the predetermined second reference temperature or higher. When thecontroller 7 receives the off-command from thethermostat 8, the room heater 1 is stopped atSTEP 6. Then, atSTEP 7, the set temperature Ts, which is used for controlling temperature when the on-command is received again, is updated according to the difference between the detected temperature Tr detected by the first room-temperature detecting means 6 of the room heater 1 when the off-command from thethermostat 8 is received and the set temperature Ts, and then returns to STEP 1. The set temperature Ts is updated, e.g., by adding to the previous set temperature Ts a half of the difference between the detected temperature Tr and the previous set temperature Ts. The updating of the set temperature Ts can alternatively be made by adding to the previous set temperature Ts the difference between the detected temperature Tr and the previous set temperature Ts. In other words, the updating can also be made by updating the set temperature Ts to the detected temperature Tr detected by the first room-temperature detecting means 6 when the off-command from thethermostat 8 is received. - On the other hand, when the
controller 7 judges at STEP 4 that the first predetermined period of time has passed or the state Tr≧Ts has continued for the second predetermined period of time, the temperature-raise control will be performed atSTEP 8 by raising the set temperature Ts by the predetermined value ΔT (e.g., 1° C.). According to this arrangement, the second reference temperature of thethermostat 8 is changed to be raised by the user. As a result, when the state in which the off-command is not received until after passing of the first predetermined time or when the state Tr≧Ts continues for the second predetermined period of time without receiving the off-command, there will be performed the temperature-rise control to raise the set temperature Ts by the predetermined value ΔT. It is therefore possible to raise the room temperature. Accordingly, when the user has changed to raise the second reference temperature of thethermostat 8, the room temperature can be made closer to the second reference temperature. Although not illustrated, the temperature rise control may be made by increasing the opening degree of theproportional valve 22 b so as to increase the amount of heat to be provided to the room air by a predetermined value, instead of raising the set temperature Ts by the predetermined value ΔT. According to this arrangement, in the same manner as described above, the room temperature can be made closer to the second reference temperature. - Then at
STEP 8, when thecontroller 7 carries out the temperature-raise control by raising the set temperature Ts by the predetermined value ΔT or by increasing the amount of heat to be provided to the room air by the predetermined value, a timing operation is started at STEP 9 with a timer B equipped in the controller 7 (timer-B-start). Then at STEP 10, thecontroller 7 determines whether the off-command from thethermostat 8 is received or not, and at STEP 11, thecontroller 7 determines whether or not the third predetermined period of time (e.g., 20 minutes) has passed after the timer-B-start. If thecontroller 7 receives the off-command from thethermostat 8 by passing of the third predetermined period of time, the process proceeds toSTEP 6. If thecontroller 7 receives no off-command from thethermostat 8 by passing of the third predetermined period of time after the timer-B-start, the process returns to STEP 8. According to this arrangement, the set temperature Ts can be raised stepwise or the amount of heat to be provided to the room air can be increased stepwise, thereby raising the room temperature to the second reference temperature. - The embodiment of this invention has been described with reference to the drawings. This invention shall not, however, be limited to the above-described embodiment. For example, in the above embodiment, the first room-
temperature detecting means 6 is configured to detect the temperature of the room temperature sucked from theair inlet 51. It may, however, be so arranged that the room-temperature detecting means may be disposed on an outer surface of the room heater 1 so that the temperature outside the room heater 1 may be detected.
Claims (2)
1. A room heater comprising:
a first room-temperature detecting means; and
a control means configured to control temperature by adjusting an amount of heat to be provided to room air according to a difference between a detected temperature detected by the first room-temperature detecting means and a predetermined set temperature wherein
a thermostat including a second room-temperature detecting means provided separately from the first room-temperature detecting means of the room heater is coupled to the control means,
the thermostat is configured: to output an on-command when a detected temperature detected by the second room-temperature detecting means becomes a predetermined first reference temperature or below; and to output an off-command when a detected temperature detected by the second room-temperature detecting means becomes a predetermined second reference temperature or above, the second reference temperature being set higher than the first reference temperature,
the control means being configured to operate the room heater on receiving an on-command from the thermostat and to stop the room heater on receiving an off-command from the thermostat,
wherein the control means carries out temperature-raise control by raising a set temperature by a predetermined value or by increasing the amount of heat to be provided to room air by a predetermined value when the control means does not receive the off-command by passing of a first predetermined period of time after having received the on-command from the thermostat or when the detected temperature detected by the first room-temperature detecting means of the room heater has been at the set temperature or higher without receiving the off-command for a second predetermined period of time.
2. The room heater according to claim 1 , wherein
the control means carries out temperature-raise control again when no off-command is received by passing of a third predetermined period of time after a previous temperature-raise control.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2013-238684 | 2013-11-19 | ||
JP2013238684A JP5913264B2 (en) | 2013-11-19 | 2013-11-19 | heater |
Publications (1)
Publication Number | Publication Date |
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US20150136861A1 true US20150136861A1 (en) | 2015-05-21 |
Family
ID=53172287
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US14/546,572 Abandoned US20150136861A1 (en) | 2013-11-19 | 2014-11-18 | Room heater |
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US (1) | US20150136861A1 (en) |
JP (1) | JP5913264B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN110307589A (en) * | 2019-06-25 | 2019-10-08 | 华帝股份有限公司 | Intelligent temperature control method of wall-mounted boiler and wall-mounted boiler |
Families Citing this family (1)
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EP3413959B1 (en) * | 2016-02-08 | 2020-06-17 | Koninklijke Philips N.V. | An aerosol generator |
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JPH04121521A (en) * | 1990-09-12 | 1992-04-22 | Toshiba Heating Appliances Co | Heating controller of heater |
JPH06185725A (en) * | 1992-12-15 | 1994-07-08 | Hitachi Home Tec Ltd | Warm air heater |
JP4424416B2 (en) * | 2007-12-19 | 2010-03-03 | ダイキン工業株式会社 | Mediation device for air conditioning control, air conditioning control system, air conditioning control method, and air conditioning control program |
JP2009270790A (en) * | 2008-05-09 | 2009-11-19 | Daikin Ind Ltd | Mediating device for air-conditioning control, air-conditioning control system, air-conditioning control method and air-conditioning control program |
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2014
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US6062482A (en) * | 1997-09-19 | 2000-05-16 | Pentech Energy Solutions, Inc. | Method and apparatus for energy recovery in an environmental control system |
US6089221A (en) * | 1998-07-06 | 2000-07-18 | Rinnai Kabushiki Kaisha | Space heater |
US6726112B1 (en) * | 2003-03-07 | 2004-04-27 | Joseph Ho | Illuminating thermostat |
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JP2015098967A (en) | 2015-05-28 |
JP5913264B2 (en) | 2016-04-27 |
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