Room heater

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.

What is claimed is: 
     
         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.