Abstract: A joined body includes: a thin plate including through holes; a first member including a proximal portion having a portion contacting the thin plate, and a protruding portion that protrudes in relation to a contact surface of the proximal portion and is inserted through the through hole; and a second member arranged oppositely to the proximal portion via the thin plate and made of a material that is same as that of the first member. The thin plate is made of a material having a specific gravity smaller than that of the material forming the first and the second members. The second member and an end portion of the protruding portion are connected to each other, by a part of the second member and a part of the end portion being melt-solidified, the end portion being at a side opposite to a side connected to the proximal portion.

Abstract: A joined body includes: a thin plate including through holes; first members each including: a base portion and a protruding portion inserted into one of the through holes; and a second member placed oppositely to the base portion via the thin plate and made of a material that is of a same kind as a material of the first members. The thin plate is made of a material having a specific gravity smaller than the materials of the first and the second members. The second member and an end portion of the protruding portion are connected together by melt-solidification. A post-joining hardness difference in a range of 30% along a direction orthogonal to a joint interface between the second member and the protruding portion, the range being centered on the joint interface, is equal to or less than 90% of a pre-joining hardness difference.

Abstract: A joined body includes: a thin plate including through holes; first members each including: a base portion and a protruding portion inserted into one of the through holes; and a second member placed oppositely to the base portion via the thin plate and made of a material that is of a same kind as a material of the first members. The thin plate is made of a material having a specific gravity smaller than the materials of the first and the second members. The second member and an end portion of the protruding portion are connected together by melt-solidification. A post-joining hardness difference in a range of 30% along a direction orthogonal to a joint interface between the second member and the protruding portion, the range being centered on the joint interface, is equal to or less than 90% of a pre-joining hardness difference.

Abstract: A joined body includes: a thin plate including through holes; a first member including a proximal portion having a portion contacting the thin plate, and a protruding portion that protrudes in relation to a contact surface of the proximal portion and is inserted through the through hole; and a second member arranged oppositely to the proximal portion via the thin plate and made of a material that is same as that of the first member. The thin plate is made of a material having a specific gravity smaller than that of the material forming the first and the second members. The second member and an end portion of the protruding portion are connected to each other, by a part of the second member and a part of the end portion being melt-solidified, the end portion being at a side opposite to a side connected to the proximal portion.

Abstract: A heat exchanger (3) having a temperature sensor (16) detecting a temperature of a water passage (300) including heat-transfer pipes (32), (33), a connecting portion (34), an inlet pipe (11), and an outlet pipe (12), and a sensor bracket (6), wherein the sensor bracket (6) is joined and fixed to the connecting portion (34) in a state in which at least a part of a base portion (60) of the sensor bracket (6) forming a mounting surface of the temperature sensor (16) is in surface contact with a planar portion (340) provided in the connecting portion (34), and the temperature sensor (16) is secured to a joint portion (600) of the base portion (60) joined and fixed to the planar portion (340).

Abstract: A forced air supply combustion apparatus sucks combustion air from an air supply port. An air filter for collecting foreign matters in the air is mounted on an air-supply-port-formed plate in an insertable and drawable manner. A filter frame is arranged to be brought into close contact with a peripheral part of the air supply port in a state of having mounted the air filter in position. The air-supply-port side edge parts are provided with retaining pieces to clamp a filter side frame part in the Z-axis direction against the side edge parts. A distance in the Z-axis direction between the air-supply-port side edge parts, and the retaining pieces is set larger than a dimension, in the Z-axis direction, of the filter side frame part, and is set smaller than a sum of the dimensions to be obtained by adding to said dimensions the projection height of the projections provided in a projecting manner.

Abstract: A vibration damping device comprises: a spindle member through which a shaft portion is inserted, the spindle member being movable along a length direction of the shaft portion; a first coil spring disposed between the spindle member and one end portion of the shaft portion in the length direction, the one end portion of the shaft portion being inserted through the first coil spring, and the first coil spring urging the spindle member toward a side of another end portion of the shaft portion in the length direction; and a second coil spring disposed between the another end portion of the shaft portion and the spindle member, the another end portion of the shaft portion being inserted through the second coil spring, and the second coil spring urging the spindle member toward a side of the one end portion of the shaft portion.

Abstract: Provided is an attachment structure for a water heater capable of easily and securely attaching the water heater to a wall surface without performing strict alignment, and capable of fine adjustment of an attachment position of the water heater even after the attachment. The attachment structure for the water heater includes a first metal fitting (1) having a wall surface attachment portion (11) configured to be attached to a wall surface (W), and a second metal fitting (2) having an instrument attachment portion (23) configured to be attached to a back surface of the instrument body (3). In the wall surface attachment portion 11, a support portion (12) configured to hang and support a weight of the water heater is extended in a direction separate from the wall surface (W).

Abstract: A forced air supply combustion apparatus sucks combustion air from an air supply port. An air filter for collecting foreign matters in the air is mounted on an air-supply-port-formed plate in an insertable and drawable manner. A filter frame is arranged to be brought into close contact with a peripheral part of the air supply port in a state of having mounted the air filter in position. The air-supply-port side edge parts are provided with retaining pieces to clamp a filter side frame part in the Z-axis direction against the side edge parts. A distance in the Z-axis direction between the air-supply-port side edge parts, and the retaining pieces is set larger than a dimension, in the Z-axis direction, of the filter side frame part, and is set smaller than a sum of the dimensions to be obtained by adding to said dimensions the projection height of the projections provided in a projecting manner.

Abstract: A heat exchanger (3) having a temperature sensor (16) detecting a temperature of a water passage (300) including heat-transfer pipes (32), (33), a connecting portion (34), an inlet pipe (11), and an outlet pipe (12), and a sensor bracket (6), wherein the sensor bracket (6) is joined and fixed to the connecting portion (34) in a state in which at least a part of a base portion (60) of the sensor bracket (6) forming a mounting surface of the temperature sensor (16) is in surface contact with a planar portion (340) provided in the connecting portion (34), and the temperature sensor (16) is secured to a joint portion (600) of the base portion (60) joined and fixed to the planar portion (340).

Abstract: A vibration damping device comprises: a spindle member through which a shaft portion is inserted, the spindle member being movable along a length direction of the shaft portion; a first coil spring disposed between the spindle member and one end portion of the shaft portion in the length direction, the one end portion of the shaft portion being inserted through the first coil spring, and the first coil spring urging the spindle member toward a side of another end portion of the shaft portion in the length direction; and a second coil spring disposed between the another end portion of the shaft portion and the spindle member, the another end portion of the shaft portion being inserted through the second coil spring, and the second coil spring urging the spindle member toward a side of the one end portion of the shaft portion.

Abstract: Provided is an attachment structure for a water heater capable of easily and securely attaching the water heater to a wall surface without performing strict alignment, and capable of fine adjustment of an attachment position of the water heater even after the attachment. The attachment structure for the water heater includes a first metal fitting (1) having a wall surface attachment portion (11) configured to be attached to a wall surface (W), and a second metal fitting (2) having an instrument attachment portion (23) configured to be attached to a back surface of the instrument body (3). In the wall surface attachment portion 11, a support portion (12) configured to hang and support a weight of the water heater is extended in a direction separate from the wall surface (W).

Abstract: A circulating-type hot-water supply device (1) is provided with a heat exchanger abnormality determining unit (62), which inhibits execution of a suitable temperature maintaining operation when the suitable temperature maintaining operation continued for a predetermined time or more and stops a circulating pump (25), and when a temperature rise range of a detected temperature of a heat exchanger outlet temperature sensor (2) after stopping the circulating pump (25) becomes equal to or more than a temperature rise threshold value determined according to a selected state of burner blocks (3a),(3b) in a combusted state immediately before stopping the circulating pump (25), determines that a heat exchanger is in an abnormal state.

Abstract: A circulating-type hot-water supply device (1) is provided with a heat exchanger abnormality determining unit (62), which inhibits execution of a suitable temperature maintaining operation when the suitable temperature maintaining operation continued for a predetermined time or more and stops a circulating pump (25), and when a temperature rise range of a detected temperature of a heat exchanger outlet temperature sensor (2) after stopping the circulating pump (25) becomes equal to or more than a temperature rise threshold value determined according to a selected state of burner blocks (3a),(3b) in a combusted state immediately before stopping the circulating pump (25), determines that a heat exchanger is in an abnormal state.

Abstract: Pressing an electronic device (2) to be tested to contact terminals (132a and 132b) while bringing a heater (112) having equal or close temperature change characteristics to those of the electronic device to be tested by a test pattern, transmitting a test pattern to the electronic device to be tested in this state, and controlling a power consumption of a heater so that total power of a power consumption of the electronic device to be tested by the test pattern and a power consumption of the heater becomes a constant value.

Abstract: A storage type water heater comprising: a stored hot water tank; a heating unit including a heat exchanger, a gas burner, and an air supply fan; a circulation pipe line; a circulating pump; a first temperature sensor for detecting an inlet side temperature T1; a second temperature sensor for detecting an outlet side temperature T2; and a controller including a control arrangement which actuates the circulating pump to circulate the stored hot water inside of the circulation pipe line when the heating unit is in a non-operated state, and determines an abnormality in one of the first temperature sensor and the second temperature sensor based on a temperature difference (|T1?T2|).

Abstract: A hot water storage type hot water supply device is capable of heating water inside a hot water storage tank appropriately, thereby preventing energy waste. A circulating pump is operated and a burner is incinerated, when the average of detected temperatures from water temperature detectors falls below a predetermined lower limit temperature. The burner is extinguished when an accumulated heating amount from the beginning of operation of a heat source equipment becomes equal to or more than a target heating amount necessary for elevating the total amount of water in the hot water storage tank to a preset hot water delivery temperature. The circulating pump is continuously operated after extinguishing the burner, until an accumulated circulated water amount of a circulating path becomes equal to or more than a predetermined water amount set to be equal to or more than a capacity of the hot water storage tank.

Abstract: There is provided an indoor mounting water heater in which combustion exhaust gas is discharged to the outdoors via an exhaust duct, wherein a decrease in draft force caused when the number of burner groups to be burned is reduced by a capacity changeover mechanism to decrease the combustion capacity can be prevented, and the heat efficiency can be improved. An air supply chamber 81 is divided into a plurality of parts 82 and 83 corresponding to a plurality of burner groups 51 and 52. The air sent from an air supply fan 84 is supplied to only a part of the air supply chamber corresponding to a burning burner group.

Abstract: Pressing an electronic device (2) to be tested to contact terminals (132a and 132b) while bringing a heater (112) having equal or close temperature change characteristics to those of the electronic device to be tested by a test pattern, transmitting a test pattern to the electronic device to be tested in this state, and controlling a power consumption of a heater so that total power of a power consumption of the electronic device to be tested by the test pattern and a power consumption of the heater becomes a constant value.

Abstract: Pressing an electronic device (2) to be tested to contact terminals (132a and 132b) while bringing a heater (112) having equal or close temperature change characteristics to those of the electronic device to be tested by a test pattern, transmitting a test pattern to the electronic device to be tested in this state, and controlling a power consumption of a heater so that total power of a power consumption of the electronic device to be tested by the test pattern and a power consumption of the heater becomes a constant value.