Control method and control device of outdoor unit blower and fixed-speed air cold hot pump unit

Abstract

The invention provides a control method and a control device of an outdoor unit blower and a fixed-speed air cold hot pump unit; the outdoor unit comprises at least two blowers, wherein every blower is provided with at least two gears; when the running time of the outdoor unit for at least two times continuously is less than the preset value and the water supply temperature reaches the highest setting value, the blower is shut down, running the following control logic; before the water supply temperature reaches the first preset temperature, controlling all blowers at the highest wind speed gear so that the water supply temperature can reach the first preset temperature rapidly; when the water supply temperature reaches the first preset temperature, lowering the control blower by at least one gear; when the water supply temperature reaches the second preset temperature, adjusting the control blower to the lowest wind speed gear; when the water supply temperature reaches the third preset temperature, closing at least one blower; until the water supply temperature reaches the fourth preset temperature, completely closing all control blowers. The control method and the control device, and the fixed-speed air cold hot pump unit prolong the highest temperature setting time, thereby reducing the start and stop frequency of the outdoor unit, and guaranteeing the stable water supply temperature.

Description

Technical field [0001] The present invention relates to the technical field of heat exchange, in particular to a control method, a control device and a fixed-speed air-cooled heat pump unit of an outdoor fan. Background technique [0002] As people's awareness of the quality of life continues to increase, in winter, more and more people will choose to use floor heating for heating. For fixed-speed air-cooled hot and cold water heat pump units, when working under a small load (such as an outdoor ambient temperature of about 10°C), the outlet water temperature will quickly reach the preset value, and the compressor will start and stop continuously, resulting in the water supply temperature The fluctuation is large, and the indoor temperature cannot reach a more comfortable temperature for a long time. [0003] In view of the above situation, there are currently two solutions: (1) Use frequency conversion products instead of fixed speed products, and use frequency conversion control ...

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Problems solved by technology

[0004] The main purpose of the present invention is to provide a control method for the fan of the external unit, aiming at solving the problem of frequent start-up and stop of the fixed-speed air-cooled heat pump unit under the condition of small load without increasing the cost and construction area, which leads to fluctuations in the water supply temperature larger technical issues

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