A heat pump hot water system and its control method

Abstract

The invention discloses a heat pump hot water system and a control method of the heat pump hot water system. The system comprises a controller, a heat pump unit, a water storage tank and a water supply pipeline. The first water outlet end of the water storage tank is communicated with the water inlet end of the heat pump unit to form a first pipeline, and the water storage tank is communicated with the water outlet end of the heat pump unit to form a second pipeline. The water storage tank, the first pipeline, the heat pump unit and the second pipeline are sequentially connected to form a circulating heating loop, and the water supply pipeline, the first pipeline, the heat pump unit and the water storage tank are sequentially connected to form a direct heating loop. The water supply pipeline is provided with a water supply pump, a first electromagnetic two-way valve, a flow sensor and a second electromagnetic two-way valve which are sequentially connected in series, and the first pipeline is provided with a circulating water pump which is electrically connected with the controller. By the adoption of the heat pump hot water system and the control method, the integration of a circulating heating mode and a direct-heating heating mode of a heat pump water heater can be effectively achieved, and the hot water supply capacity of the heat pump water heater is improved, so that improvement of the use comfort of users is facilitated.

Description

technical field [0001] The invention relates to the technical field of heat pump water heaters, in particular to a heat pump hot water system and a control method thereof. Background technique [0002] At present, the heat pump water heater adopts the heat pump principle to increase the heat energy in the air to a high level of heat energy. It has the advantages of energy saving and environmental protection when used to prepare hot water, and has gradually been widely used. According to the heating mode of the heat pump water heater, it is divided into a circulating water heater and a direct heating water heater. [0003] The circulating hot water machine continuously draws cold water from the bottom of the water storage tank into the heat pump unit for heating, and the hot water heated by the heat pump enters the top of the water storage tank through the outlet pipe, and the user draws hot water from the inside of the water storage tank through the water end use; while the...

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Problems solved by technology

[0005] The embodiment of the present invention provides a heat pump hot water system and its control method to solve the problem of the slow heating speed of existing circulating water heaters and the shortage of hot water supply when the hot water demand of direct heating water heaters is large In order to effectively realize the integration of the circulating and direct heating modes of the heat pump water heater, improve the hot water supply capacity of the heat pump water heater, and improve the comfort of users

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