Abstract: A combustion apparatus includes a combustion part, a blower fan, an ignition device, and a control part. The control part selectively performs continuous combustion in which the combustion part is operated to burn continuously and intermittent combustion in which a combustion period and a non-combustion period of the combustion part are repeatedly provided. When the continuous combustion is stopped, the control part extinguishes the combustion part and operates the blower fan to perform a scavenging operation. When the combustion period in the intermittent combustion is ended, the control part extinguishes the combustion part and operates the blower fan to perform a scavenging operation in the non-combustion period. A total air blowing amount of the blower fan in the scavenging operation during the non-combustion period is set to be less than a total air blowing amount of the blower fan in the scavenging operation when the continuous combustion is stopped.

Abstract: A thermal energy recovery device includes: a circulation line having an evaporator, an expander, a condenser, and a pump; a power recovery machine; a first on-off valve; a thermal energy introduction line configured to introduce a gas phase working medium into a post-expansion space; a second on-off valve; and a control unit. Until an evaporation condition that a liquid phase working medium accumulated in the post-expansion space has reached an amount equal to or smaller than a reference amount is met, the control unit closes the first on-off valve and opens the second on-off valve, and drives the pump in a state where the expander is stopped, and when the evaporation condition is met, the control unit opens the first on-off valve and closes the second on-off valve, and drives the expander.

Abstract: A reverse combustion type combustion apparatus (1) includes a combustion section (2) that combusts fuel in a downward direction, heat exchangers (4, 5) disposed under the combustion section (2), and an exhaust box (6) disposed under the heat exchangers (4, 5). The exhaust box (6) is a molded product made from a synthetic resin material; the exhaust box (6) includes an opening portion (30) for introduction of combustion exhaust gases generated by an upper portion, a fixing portion (33) for fixing the heat exchanger (5), and an inclined bottom portion (35) that collects condensed water generated by the heat exchanger (5); and, at the lower end portion of the exhaust box (6), at least three legs (40) are integrally formed and make the exhaust box (6) stand up by itself.

Abstract: A thermal energy recovery device capable of suppressing a rapid increase of thermal stress generated in an evaporator when the operation is started and a start-up method thereof are provided. The thermal energy recovery device includes an evaporator, a preheater, an energy recovery unit, a circulating flow path, a pump, a heating medium flow path for supplying a heating medium to the evaporator and the preheater, a flow adjustment unit provided in a portion on the upstream side than the evaporator within the heating medium flow path, and a control unit. The control unit controls the flow adjustment unit so that the inflow amount of the heating medium in a gas-phase to the evaporator gradually increases, in a state that the pump is stopped, until the temperature of the evaporator becomes a specified value.

Abstract: A reverse combustion type combustion apparatus (1) includes a combustion section (2) that combusts fuel in a downward direction, heat exchangers (4, 5) disposed under the combustion section (2), and an exhaust box (6) disposed under the heat exchangers (4, 5). The exhaust box (6) is a molded product made from a synthetic resin material; the exhaust box (6) includes an opening portion (30) for introduction of combustion exhaust gases generated by an upper portion, a fixing portion (33) for fixing the heat exchanger (5), and an inclined bottom portion (35) that collects condensed water generated by the heat exchanger (5); and, at the lower end portion of the exhaust box (6), at least three legs (40) are integrally formed and make the exhaust box (6) stand up by itself.

Abstract: A thermal energy recovery device includes: a circulation line having an evaporator, an expander, a condenser, and a pump; a power recovery machine; a first on-off valve; a thermal energy introduction line configured to introduce a gas phase working medium into a post-expansion space; a second on-off valve; and a control unit. Until an evaporation condition that a liquid phase working medium accumulated in the post-expansion space has reached an amount equal to or smaller than a reference amount is met, the control unit closes the first on-off valve and opens the second on-off valve, and drives the pump in a state where the expander is stopped, and when the evaporation condition is met, the control unit opens the first on-off valve and closes the second on-off valve, and drives the expander.

Abstract: A hot water supply device 1 includes a fin-and-tube type heat exchanger (21) that applies heat to fresh water with combustion gases, and a heat exchanger casing (22) for housing the heat exchanger (21), and in order to be able reliably to determine by a simple method whether the hot water supply device is clogged by lime scale, there are provided a temperature detector (31) for detecting the surface temperature of the heat exchanger casing (22) and a control unit (7) that determines that scale has built up in the heat exchange tubing (27) of the heat exchanger (21) when the temperature detected by this temperature detector (31) is greater than a set temperature.

Abstract: A thermal energy recovery device capable of suppressing a rapid increase of thermal stress generated in an evaporator when the operation is started and a start-up method thereof are provided. The thermal energy recovery device includes an evaporator, a preheater, an energy recovery unit, a circulating flow path, a pump, a heating medium flow path for supplying a heating medium to the evaporator and the preheater, a flow adjustment unit provided in a portion on the upstream side than the evaporator within the heating medium flow path, and a control unit. The control unit controls the flow adjustment unit so that the inflow amount of the heating medium in a gas-phase to the evaporator gradually increases, in a state that the pump is stopped, until the temperature of the evaporator becomes a specified value.

Abstract: A hot water supply device 1 includes a fin-and-tube type heat exchanger (b 21) that applies heat to fresh water with combustion gases, and a heat exchanger casing (b 22) for housing the heat exchanger (b 21), and in order to be able reliably to determine by a simple method whether the hot water supply device is clogged by lime scale, there are provided a temperature detector (b 31) for detecting the surface temperature of the heat exchanger casing (b 22) and a control unit (b 7) that determines that scale has built up in the heat exchange tubing (b 27) of the heat exchanger (b 21) when the temperature detected by this temperature detector (b 31) is greater than a set temperature.

Abstract: A lubricating liquid separator which can damp compressor pulsation noise effectively and improve the lubricating liquid separating performance without greatly enlarging the size of the separator itself. A demister having a sound absorbing performance is disposed on an outer periphery of a partition plate. Compressed gas which enters the interior of a housing through a compressed gas inlet port flows as rotating flow in a flow path between the partition plate and a portion of a side wall of the housing opposed to the partition plate. Pressure pulsation of the compressed gas is diminished by the demister, and a compressor pulsation noise by the rotating flow of the compressed gas is diminished by the sound absorption of the demister. Further, with the demister, reflection of the compressed gas at a wall surface of the partition plate is suppressed, and scattering of lubricating liquid separated from the compressed gas is suppressed.

Abstract: A lubricating liquid separator is disclosed which can damp a compressor pulsation noise effectively and improve the lubricating liquid separating performance without greatly enlarging the size of the separator itself. A demister (6) having a sound absorbing performance is disposed on an outer periphery side of a partition plate (5). Compressed gas which enters the interior of a housing (2) through a compressed gas inlet port (3) flows as rotating flow in a flow path (10) formed between the partition plate (5) and a portion of a side wall of the housing (2) opposed to the partition plate (5). Pressure pulsation of the compressed gas is diminished by the demister (6), and a compressor pulsation noise induced by the rotating flow of the compressed gas is diminished by the sound absorbing performance of the demister (6).