A control circuit for geothermal heating in agricultural greenhouses
A control circuit and greenhouse technology, applied in pump control, liquid variable capacity machinery, greenhouse cultivation, etc., can solve problems affecting the quality and yield of fruits and vegetables, and unfavorable growth of fruits and vegetables, so as to save manpower, protect the line from phase loss, and avoid electric energy. wasteful effect
Inactive Publication Date: 2016-08-24
罗德明
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Problems solved by technology
[0003] In winter nights or in rainy weather, the temperature in the agricultural greenhouse is too low, which is not conducive to the growth of fruits and vegetables, affecting the quality and yield of fruits and vegetables
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Embodiment Construction
[0013]Embodiments In the implementation shown in the accompanying drawings, a control circuit for geothermal heating in agricultural greenhouses consists of a power supply circuit, an information processing circuit and a control output circuit, wherein the power supply circuit consists of a rectifier transformer (TC), a bridge rectifier circuit (VD ), filter capacitor a (C1), voltage stabilization integrated block (IC1) and filter capacitor b (C2), the primary coil of the rectifier transformer (TC) is connected to the phase line input terminal (2) of the power supply and the neutral line input of the power supply Terminal (1), the secondary coil of the rectifier transformer (TC) is connected to the two input terminals of the bridge rectifier circuit (VD), the positive pole of the bridge rectifier circuit (VD) is connected to the positive pole of the filter capacitor a (C1) and the stable The input terminal of the pressure integrated block (IC1), the output terminal of the volta...
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A control circuit for geothermal heating in agricultural greenhouses, related to the temperature control circuit of agricultural greenhouses, consisting of a power supply circuit, an information processing circuit and a control output circuit, the output end of the voltage stabilizing integrated block is connected to the positive pole of the filter capacitor b to form a DC operation The power supply, the negative pole of the bridge rectifier circuit, the negative pole of the filter capacitor a, the negative pole of the filter capacitor b and the ground terminal of the voltage stabilization integrated block are connected to form a ground wire; the feed terminal is connected to the DC working power supply, and the upper limit temperature signal terminal is connected to the The two input terminals of the NAND gate b, the output terminal of the NAND gate b is connected to the first input terminal of the NAND gate c, the output terminal of the NAND gate c is connected to the second input terminal of the NAND gate d, and the lower limit temperature signal The terminal is connected to the two input terminals of the NAND gate a, the output terminal of the NAND gate a is connected to the first input terminal of the NAND gate d, and the output terminal of the NAND gate d is connected to the second input terminal of the NAND gate c . The invention enables the geothermal circulating water pump to operate reasonably, saves manpower and avoids waste of electric energy.
Description
technical field [0001] The invention relates to an electronic circuit, in particular to a temperature control circuit of an agricultural greenhouse. Background technique [0002] The agricultural greenhouse is a frame-covered structure with thermal insulation properties. Its appearance allows people to eat off-season vegetables and fruits. Generally, agricultural greenhouses use a bamboo structure or a steel structure frame, covered with one or more layers of thermal insulation plastic film, thus forming a greenhouse space. The outer film can well prevent the loss of carbon dioxide produced by the growth of vegetables inside, so that the shed has a good heat preservation effect. [0003] During winter nights or rainy weather, the temperature in the agricultural greenhouse is too low, which is not conducive to the growth of fruits and vegetables, affecting the quality and yield of fruits and vegetables. The use of geothermal heat to heat agricultural greenhouses is of great...
Claims
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IPC IPC(8): F04B49/06A01G9/24
CPCY02A40/25
Inventor 吴水仙
Owner 罗德明