Energy-saving constant-temperature system for greenhouse and control method of system

Abstract

The invention discloses an energy-saving constant-temperature system for a greenhouse and a control method of the system. The interior of the greenhouse is communicated with the interior of a body ofa heat pump unit to form a circulating air path, and when the heat pump unit runs in a heating mode, hot air in the greenhouse enters the heat pump unit through a first air inlet and is cooled by a second heat exchanger to form cold air, and the cold air is sent back into the greenhouse under the action of a fan module; when the heat pump unit runs in a refrigeration mode, cold air in the greenhouse enters the heat pump unit through the first air inlet and is heated by the second heat exchanger to form hot air, and the hot air is sent back into the greenhouse under the action of the fan module. Through the arrangement of a heating water path, hot water on the upper portion of a water tower is sent into heating heat exchange pipes laid on the bottoms of planting pots for radiant heat exchange, and it is achieved that the bottoms of the planting pots are heated. Visibly, the constant temperature system can meet the constant-temperature requirements for heating and refrigeration in the greenhouse, the energy efficiency is high, the energy-saving effect is obvious, and it can be ensured that the heat pump unit normally runs.

Description

technical field [0001] The invention belongs to the technical field of greenhouse constant temperature, and more specifically relates to an energy-saving greenhouse constant temperature system and a control method thereof. Background technique [0002] In the past, the constant temperature system of the greenhouse was usually heated by a gas boiler, and then the radiant tubes laid on the upper and lower sides of the greenhouse were used for heating up and down. The heating temperature is uniform, which affects the constant temperature effect, and it is heated by a gas boiler, which consumes a lot of energy and does not save energy. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide an energy-saving greenhouse constant temperature system and its control method, which can meet the constant temperature requirements inside the greenhouse, have high energy efficiency and obvious energy-saving effect, and can ensure the n...

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Problems solved by technology

[0002] In the past, the constant temperature system of the greenhouse was usually heated by a gas boiler, and then the radiant tubes laid on the upper and lower sides of the greenhouse were used for heating up and down. The heating temperature is uniform, which affects the constant temperature effect, and the gas boiler is used for heating, which consumes a lot of energy and does not save energy.

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