Abstract: A radio communication system of a water heater comprising a slave set which remotely operates a water heater main body by radio communication, and a master set which continuously communicates with the water heater main body by wired communication and which intermittently communicates with the slave set by radio communication to relay communication between the water heater main body and the slave set, wherein after the slave set instructs to change a hot water supply temperature of the water heater main body to a requested temperature by the salve set, the requested temperature previously instructed by the slave set is maintained as the hot water supply temperature displayed on the display section of the slave set for a particular time until the hot water supply temperature of the water heater main body reaches the temperature requested by the slave set.

Abstract: A relay apparatus for relaying communication between a water heater main body and a radio remote control unit, comprising: a switch section for setting an address of the radio remote control unit; a control section for establishing communication with the water heater main body and commanding and controlling to read out maintenance information stored in the water heater main body assuming that input information at the switch section is a request from the radio remote control unit having an address which was set by operation of the switch section; and a display section for displaying the maintenance information received from the water heater main body.

Abstract: A water heating apparatus comprising: a device body for heating and producing hot water that is capable of connecting to one or more remote control units for remotely operating the device body, the device body having an outer casing; a connection-number counter disposed within the outer casing of the device body for determining the number of remote control units upon powering-up the device body; and a display unit disposed within the outer casing of the device body for indicating the number of the connected remote control units determined by the connection-number counter, wherein a display of the display unit is visible from the exterior through a window formed in the outer casing.

Abstract: A water heater comprising: a case main body; a front cover for closing a front opening of the case main body; a waterproof packing member interposed between a first inner peripheral flange formed on an inner peripheral edge of the front opening of the case main body and a second inner peripheral flange formed on an inner peripheral edge of a rear end of the front cover; and a water receiver which is located below the waterproof packing member disposed in an upper region and which extends from the first inner peripheral flange of the case main body or the second inner peripheral flange of the front cover.

Abstract: There is provided a circulation type hot water supply device in which a downstream end of a hot water delivering channel 6 connected to a heat exchanger 4 of a water heater 1 is connected to a water supply channel 5 upstream of the heat exchanger, and a circulating pump 25 that returns hot water fed from the heat exchanger to the hot water delivering channel to the heat exchanger through the water supply channel is provided in the hot water delivering channel. The device can reliably identify an abnormality when it occurs, such as adhesion of a deposit to an inner surface of a heat absorbing pipe 4b to reduce heat exchange efficiency. A diagnosis is started when a hot water delivering tap 7 is closed and a burner 3 is subjected to combustion. In the diagnosis, supply of water to the heat exchanger 4 is first stopped to shut down the burner 3.

Abstract: Provided is a combustion apparatus that can positively prevent a combustible gas present in the vicinity from catching fire in performing prepurge, which involves exhausting air from a combustion chamber provided with a burner, before igniting the burner. The combustion apparatus 1 contains combustion control means 6 that ignites the burner after performing prepurge by use of a fan 4, and gas detection means 5 that is provided between an air supply port 7 and the fan 4 and detects the concentration of a combustible gas. The combustion control means 6 ascertains, before starting the prepurge, whether a combustible gas of a preset maximum concentration or higher is detected by use of the gas detection means 5 (STEP 1) and prohibits the prepurge by prohibiting the energization of the fan 4 when a combustible gas of the maximum concentration or higher has been detected (STEP 2).

Abstract: An outer case 10 accommodating a gas combustion apparatus main body comprises a case main body 2 opening forward, and a front cover 3 closing a front end opening of the case main body 2. A waterproof packing material 17 is sandwiched between inner peripheral flanges 20 and 39 formed on inner peripheral edges of the front end opening of the case main body 2 and a rear end of the front cover 3. To deteriorate outward appearance and cleaning easiness of a connected portion between the front cover 3 and the case main body 2, and to stably secure waterproof of the connected portion for a long term, a protection plate covering a range extending along an upper edge of a front end opening of the case main body 2 of the packing material 17 is possessed to the front cover 3 or the case main body 2.

Abstract: A hot water supply system includes: a casing 1 having an opening in a front face; a front panel 2 covering the front face of the casing; and a console box 7 attached to the casing. The front panel has a window into which the console box is to be fitted. The clearance between the window and the console box is eliminated to improve the appearance of the system, and it is provided that the front panel can be attached to the casing without problems. In order to eliminate the clearance between the window 20 and the console box 7, the window 20 has a size enough for the console box 7 to be tightly fitted therein. In order that the console box 7 fitted in the window 20 can move vertically and horizontally together with the front panel 2, a support plate 8 for the console box 7 is attached to the casing 1 with a vertical and a horizontal play.

Abstract: A cooking stove in which an operation circuit board formed with an electrode pattern is placed on a back surface of a glass top plate so as to suppress the formation of an air layer. The cooking stove includes a display mark and a switch mark provided on a front surface of the glass top plate so as to have a first positional relationship, a case having a display opening corresponding to the display mark with the first positional relationship and an operation circuit board opening corresponding to the switch mark, the case being bonded to the uneven back surface of the glass top plate so that the display opening is positioned at the display mark, and a bonding layer that bonds the back surface of the glass top plate to a part of the operation circuit board in which an electrode pattern is formed, via the operation circuit board opening in the case so that depressed portions of the back surface of the glass top plate are filled with a double coated tape having a foam as a base material.

Abstract: Disclosed is a space heater, with an air cleaning function, that monitors combustion at a burner, and prevents the halting of combustion due to the erroneous detection of a combustion abnormality.

Abstract: A hot water supply system which allows two hot water supply apparatuses to operate cooperatively and which can avoid degrading a hot water supply capability when one of the two hot water supply apparatuses cannot perform as a master or slave. The two hot water supply apparatuses each have a connection communication terminal, a master controller, an external communication terminal, and a slave controller. The hot water supply system includes a communication cable via which the connection communication terminal of one of the two hot water supply apparatuses is connected to the external communication terminal of the other hot water supply apparatus, and a failure reporting device for reporting a failure in the master controller provided in the hot water supply apparatus operating as the master and a failure in the slave controller provided in the hot water supply apparatus operating as the slave.

Abstract: The present invention provides a cooking stove that prevents an instruction from being given using the touch switch owing to a factor different from the user's operation, while hindering the user from having an incongruous or anxious feeling when operating the touch switch. Touch switches 10 to 13 are provided on a glass top plate covering a top surface of a cooking stove main body accommodating a left burner and a right burner; the touch switches 10 to 13 sense an object that contacts with or approaches the top surface of the glass top plate. When any of the touch switches is turned on and then turned off again, heating control 31 executes a pre-assigned process to the touch switch. When the touch switch is turned on, lighting control 32 changes the displays of display sections 14 to 17 to ones corresponding to the state of a burner after the process has been executed before executing a pre-assigned process to the touch switch.

Abstract: To provide an inexpensive hot-water supply system that allows a user to readily select a desired unit for a physical quantity indicated on a display section of a remote controller. A bathroom-installed remote controller 4 is provided with a indication unit switching device that switches the units of hot-water temperature and hot-water amount represented by data transmitted from a water heater and indicated on a display section 20 between Fahrenheit/gallon (shown in FIG. 3(a)) and Celsius/liter (shown in FIG. 3(b)) depending on the presence or absence of long press of an operational switch 32 while the water heater is in a stand-by state.

Abstract: The present invention provides a burner capable of recovering more reliably a flame going out at one flame port via the transfer of flames from other flame ports when the burner is turned down. The burner according to the present invention is formed of two metal plates 10, 20 having substantially wave-shaped ends and superposed with the wave phases shifted. The burner comprises plural flame ports 12, 22 vertically alternately disposed along the ends of the metal plates 10, 20, and plural gas channels 14, 24 for supplying gas to the flame ports 12, 22. The burner further has a first deformed portion 16 where one metal plate 10 is deformed toward the other metal plate 20 at the flame port portions of one of the upper and lower flame ports 12, 22.

Abstract: A burner capable of reducing manufacturing costs by attaching upper and lower flow regulating plates to a metal plate rationally from the viewpoint of costs is provided. A burner 100 comprises a metal plate, having formed thereto a plurality of flame ports 102 disposed along the inner circumference of an opening 101 and alternately protruding in the upper and lower directions, and an annular mixture pipe 106 disposed outwardly of the opening 101. Substantially annular upper and lower flow regulating plates 200 and 300 are respectively disposed above and below the burner 100 with a clearance therebetween. The burner 100 has an integrally disposed flange portion 120 extending outwardly from the annular mixture pipe 106.

Abstract: In an in-wall heater, in which control equipment 11, 12 is disposed in a side space 10 on one lateral side of a combustion housing 2 within an outer case 1 and an exhaust duct 15 is disposed in a side space 13 on the other lateral side of the combustion housing 2, the cooling performance of each of the side spaces is increased and noise due to a sucked-in sound of room air can be reduced. In a side plate portion of the outer case 1 on both lateral sides, an air intake opening 7, which is vertically long, is provided in a position in a front side portion exposed to a front of a room wall. Each side space 10, 13 within the outer case 1 is formed in a ventilation flue on the suction side where the room air from each of the air intake openings 7 is conducted into the warm air fan 9.

Abstract: There is provided a remote control unit capable of setting time by a simple operation at a time when a battery is attached. In the remote control unit which is operated by the battery to remote-control operation start and stop of an apparatus main body and in which setting of a timer operation by a clocking means is possible, when the battery is attached to start the operation, a forced mode setting means displays a clocking initial value in a liquid crystal display in step 1, starts a monitor timer in step 2, and sets a “time setting mode” in which the setting of a clocking start initial value is possible by UP and DOWN switches without depending on the operation of a time set switch.

Abstract: In a hybrid hot air heater according to the present invention, a chassis having first and second outlets 13 on its front face and first and second inlets 12 on its rear face incorporates therein a gas heater unit 2 comprised of a gas burner 20 and a first air-blowing fan 21 and an electric heater unit 3 comprised of an electric heater 33 and a second air-blowing fan 30 in such a manner that the air blowing systems for the respective two heaters may be independent of each other.