Immediate hot water supply system

Abstract

The invention provides an immediate hot water supply system (1). The immediate hot water supply system (1) comprises a hot water supply device P (10), a hot water supply device N (30), a check valve (6) and a jointing controller (60), wherein the hot water supply device P (10) is used for heating hot water flowing in a first supply pipe (2), and the hot water supply device N (30) is used for heating hot water flowing in a second supply pipe (3). When the detection flow of a second flow sensor (34) is larger than or equal to the hot water supply detector flow, the jointing controller (60) carries out hot water supply operating; and when the detection flow of the second flow sensor (34) is smaller than the hot water supply detector flow, the jointing controller (60) carries out circulating heat preservation operating. Under the condition that a circulating pump (16) is stopped, hot water supply operating enables a first burner (12) or a second burner (32) to burn. Under the condition that the circulating pump (16) operates, circulating heat preservation operating enables the first burner (12) to burn.

Description

technical field [0001] The invention relates to an instant hot water supply system with the function of immediately supplying hot water when the hot water outlet valve is opened. Background technique [0002] Conventionally, the following instant hot water supply system is known (for example, refer to JP-A-2004-286397). The instant hot water supply system has a supply pipe, a return pipe and a circulating pump, and a plurality of hot water supply devices are connected in the middle of the supply pipe connected to the water channel at one end and connected to the hot water outlet plug at the other end. The hot water circulating in the supply pipe is heated, the return pipe bypasses these hot water supply devices and communicates with the supply pipe, and the circulation pump circulates the hot water in the circulation loop formed by the supply pipe and the return pipe. [0003] In the instant hot water supply system described in the above-mentioned gazette, when the hot wate...

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Problems solved by technology

Moreover, in order to detect the state of hot water supply, such as the instant hot water supply system mentioned above, it is specially equipped with a second flow sensor for detecting the flow rate of hot water flowing in the return pipe and a second flow sensor installed at the junction of the return pipe and the water supply pipe. In the case of the third temperature sensor, there is a problem that the configuration of the system becomes complicated and the cost of the system increases due to the increase of components.

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