Defrosting control method and system of water heater and heat pump water heater
A control method and technology for a control system are applied in the field of air-energy water heaters, and can solve the problems of the water heater's water-producing capacity decline and temperature detection failure.
Active Publication Date: 2015-02-04
GD MIDEA HEATING & VENTILATING EQUIP CO LTD
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Problems solved by technology
[0005] The purpose of the present invention is to provide a water heater defrosting control method, aiming to solve the problem that the outdoor coil temperature detection fails without defrosting the heat exchanger, resulting in the decline of the water heater’s hot water heating capacity
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[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0026] In this embodiment, the heat pump water heater is provided with an ambient temperature sensor for detecting the ambient temperature, a coil temperature sensor for detecting its temperature is provided on the outdoor coil, and a coil temperature sensor for detecting its return air temperature is provided on the return air port of the compressor. The return air temperature sensor, the ambient temperature sensor, the coil temperature sensor, and the return air temperature sensor are electrically connected to the controller of the heat pump water heater and trans...
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The invention is applied to the technology of air energy water heaters, and provides a defrosting control method and system of a water heater and a heat pump water heater. The method comprises the steps of obtaining the environment temperature and the outdoor coil temperature in real time; when the environment temperature is lower than a preset environment temperature threshold value, and the outdoor coil temperature is not lower than a preset coil temperature threshold value, obtaining the back temperature of a compressor in real time; when a temperature difference value between the back temperature and the outdoor coil temperature is larger than a preset temperature difference value, and the back temperature is lower than a preset back temperature threshold value, accumulating duration when the back temperature is lower than the preset back temperature threshold value; and when the duration exceeds a preset duration threshold value, executing a defrosting mode. The problem that due to detection failures of the outdoor coil temperature, defrosting of a heat exchanger cannot be carried out, and consequently the water heating capability of the water heater is reduced is solved.
Description
technical field [0001] The invention belongs to the field of air energy water heaters, and in particular relates to a water heater defrosting control method, system and heat pump water heater. Background technique [0002] With the continuous development of the heat pump water heater industry, its market share has also moved from the southern region to the north. However, the farther to the north, the ambient temperature is relatively lower, so when the heat pump water heater works at a lower ambient temperature, The outdoor heat exchanger will gradually frost. If it is not defrosted in time, the heat exchange efficiency of the outdoor heat exchanger will be greatly reduced, and even hot water cannot be produced. Therefore, when the ambient temperature is low, The heat pump water heater will regularly defrost the outdoor heat exchanger according to some test data, or perform manual forced defrosting to ensure the normal heat exchange work of the outdoor heat exchanger. [0...
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IPC IPC(8): F24H4/02F24H9/20F25B47/02
Inventor 王保森余彬
Owner GD MIDEA HEATING & VENTILATING EQUIP CO LTD