A method for controlling the fan motor of an outdoor unit of a low-temperature air source heat pump unit
A technology of fan motor and low-temperature air, which is applied in refrigerators, compressors, refrigeration and liquefaction, etc. It can solve problems such as difficulty in starting compressors, stalling and overloading, and difficulty in starting at low temperatures, so as to avoid compressors being overloaded and unable to operate normally Effect
Active Publication Date: 2019-07-19
河南恒天润景环境科技股份有限公司
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Problems solved by technology
With the maturation of enthalpy injection technology and two-stage compression technology, the use of heat pump devices for hot water and heating in cold regions is also popularized and applied in a large area, but there are still problems such as difficulty in starting low temperature when using heat pump devices in low temperature environments.
Especially when the ambient temperature is lower than -10°C, it is difficult for the compressor to start after the heat pump defrosts, and there are often phenomena such as stalling and overloading
Method used
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Embodiment
[0030] Such as figure 1 As shown, when the heat pump unit meets the stop condition ①, the heat pump unit turns from the heating operation state to the stop state, and the compressor and fan motor stop at the same time.
[0031] When the heat pump unit meets the operating conditions ②, the heat pump unit turns from the shutdown state to the heating operation state, and the fan motor starts ③ after the compressor starts normally for 10 seconds. At this time, the high-temperature and high-pressure refrigerant from the compressor is transported to the indoor heat exchanger through the pipeline for corresponding heat exchange. After the heat exchange, the refrigerant passes through the electronic expansion valve and the pipeline, and is sent to the outdoor heat exchanger for heat exchange with the outside air, and then returns to the compressor through the pipeline to complete the whole cycle. The above time interval can be adjusted accordingly according to actual equipment operat...
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The invention relates to a method for controlling a fan motor of an outdoor unit of a low-temperature air source heat pump unit. When the heat pump unit reaches the stop condition, a compressor and an outdoor fan simultaneously stop operation. When the compressor shifts from stop to a running state and the running condition of the fan motor is met, the compressor is started prior to the fan motor. At the environmental temperature lower than 10 DEG C, the control method can enable the heat pump compressor to normally start, avoid locked-rotor overload of the compressor, and ensures normal operation of a heat pump.
Description
technical field [0001] The invention relates to the technical field of air source heat pump refrigeration, in particular to a method for controlling a fan motor of an outdoor unit of a low temperature air source heat pump unit. Background technique [0002] Due to the characteristics of energy saving and installation flexibility of air source heat pumps, air source heat pumps are widely recognized and applied, not only for domestic hot water production, but also for heating, drying and other fields. With the maturation of enthalpy injection technology and two-stage compression technology, the use of heat pump devices for hot water and heating in cold regions is also popularized and applied in large areas. However, the application of heat pump devices in low temperature environments still has problems such as difficulty in starting at low temperatures. Especially when the ambient temperature is lower than -10°C, it is difficult for the compressor to start after the heat pump ...
Claims
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IPC IPC(8): F25B13/00
CPCF25B13/00F25B2313/0294
Inventor 陈杰奇石磊马伟超
Owner 河南恒天润景环境科技股份有限公司