The present invention provides a combined heating and hot-water boiler for heating and hot-water. The combined heating and hot-water boiler comprises: a main heat exchanger which heats heating water through heat exchange; a hot-water heat exchanger to which the heating water heated by the main heat exchanger is supplied, and which heats tap water into hot water through heat exchange with the heating water; and a control unit which controls the flow of the heating water having passed through the hot-water heat exchanger to control the formation of at least one of a first flow path for supplying, to an object to be heated, the heating water having passed through the hot-water heat exchanger, and a second flow path for supplying, to the main heat exchanger, the heating water having passed through the hot-water heat exchanger.

The present invention provides a combined heating and hot-water boiler for heating and hot-water. The combined heating and hot-water boiler comprises: a main heat exchanger which heats heating water through heat exchange; a hot-water heat exchanger to which the heating water heated by the main heat exchanger is supplied, and which heats tap water into hot water through heat exchange with the heating water; and a control unit which controls the flow of the heating water having passed through the hot-water heat exchanger to control the formation of at least one of a first flow path for supplying, to an object to be heated, the heating water having passed through the hot-water heat exchanger, and a second flow path for supplying, to the main heat exchanger, the heating water having passed through the hot-water heat exchanger.

A combined heat and power (CHP) system is installed with a power lock-out feature preventing flow of heated working fluid to an expander driving a generator generating electrical power until installation by a licensed person is completed, whereby heat can be provided to a building substantially immediately after installation of the CHP system, while power generation can be deferred until convenient.

A combined heat and power (CHP) system is installed with a power lock-out feature preventing flow of heated working fluid to an expander driving a generator generating electrical power until installation by a licensed person is completed, whereby heat can be provided to a building substantially immediately after installation of the CHP system, while power generation can be deferred until convenient.

A heating and hot water supplying device includes: a circulation passage that connects a heat exchanger and an external heating terminal; a bypass passage that bypasses the heating terminal by branching from the circulation passage; a hot water supply passage for supplying the hot water heated to a preset hot water supply temperature by the heat exchanger for hot water supply; a control unit that controls operations in which this plurality of units are used; and an operation terminal for performing various operations. A distribution valve is provided in the branching portion of the bypass passage. The distribution valve adjusts the distribution ratio so that each of a heating operation, a hot water supplying operation, and a simultaneous heating and hot water supplying operation is possible. The operation terminal is provided with a prohibit switch to prohibit the simultaneous heating and hot water supplying operation.

A heating and hot water supplying device includes: a circulation passage that connects a heat exchanger and an external heating terminal; a bypass passage that bypasses the heating terminal by branching from the circulation passage; a hot water supply passage for supplying the hot water heated to a preset hot water supply temperature by the heat exchanger for hot water supply; a control unit that controls operations in which this plurality of units are used; and an operation terminal for performing various operations. A distribution valve is provided in the branching portion of the bypass passage. The distribution valve adjusts the distribution ratio so that each of a heating operation, a hot water supplying operation, and a simultaneous heating and hot water supplying operation is possible. The operation terminal is provided with a prohibit switch to prohibit the simultaneous heating and hot water supplying operation.

A heating and hot-water-supply apparatus is provided with: a control unit that performs control on the basis of detection parameters of a plurality of detection means installed at the aforementioned locations and a setting parameter set in an operation unit. The distribution means can adjust the distribution ratio so as to correspond to a heating operation, a hot-water supply operation, and the simultaneous heating and hot-water-supply operation. The control unit prohibits the simultaneous heating and hot-water-supply operation in a case in which the required heating capacity for the hot-water supply operation calculated on the basis of the detection parameters and the setting parameter is equal to or greater than a predetermined standard capacity.

In a heating and hot water supply device including a burning means, a first heat exchanger, a circulation passage for circulating a heating thermal medium, a circulation pump, a first bypass passage, a second heat exchanger for hot water supply, a hot water supply passage, a distribution means at a branching portion of the first bypass passage, and a second bypass passage bypassing the second heat exchanger, a flow rate adjustment means for adjusting a bypass flow rate in the second bypass passage is provided. The distribution means is capable of adjusting its distribution ratio for heating, or hot water supply, or simultaneous heating/hot water supply. All passage connection portions on the second heat exchanger were provided on its one side portion.

In a heating and hot water supply device including a burning means, a first heat exchanger, a circulation passage for circulating a heating thermal medium, a circulation pump, a first bypass passage, a second heat exchanger for hot water supply, a hot water supply passage, a distribution means at a branching portion of the first bypass passage, and a second bypass passage bypassing the second heat exchanger, a flow rate adjustment means for adjusting a bypass flow rate in the second bypass passage is provided. The distribution means is capable of adjusting its distribution ratio for heating, or hot water supply, or simultaneous heating/hot water supply. All passage connection portions on the second heat exchanger were provided on its one side portion.

In a heating and hot water supply apparatus, a heat exchanger for hot water supply includes a primary-side path and a secondary-side path. A bypass path branches from a heating circulation path and is configured such that a heat transfer medium heated by a heating device flows through the primary-side path without passing through a heating terminal when hot water supply operation is performed and then joins the heating circulation path again. A control unit controls a flow rate regulating valve so that a hot water flow rate does not exceed a reference limit flow rate when hot water supply operation is performed. The reference limit flow rate is set on the basis of the smaller one between a maximum heating capacity of the heating device and a heating capacity of the heating device at which an output temperature of the heated heat transfer medium reaches an upper limit temperature.