52results about How to "Control wind speed" patented technology

The invention discloses a method for measuring the lampblack concentration of a range hood. The method comprises the steps that the intensity of light penetrating through a lampblack area and the intensity of light, from the same light source as the light penetrating through the lampblack area, reflected by the lampblack area are detected through two light receivers respectively, and the lampblack concentration of the lampblack area or the variation tendency of the lampblack concentration of the lampblack area is judged through the difference value between the light intensities received by the two light receivers. The light receiving direction of the light receiver receiving the light penetrating through the lampblack area and the light emitting direction of the light source are located on the same straight line, and the straight line penetrates through the central point of a lampblack collection cavity of the range hood. The light receiver receiving the light reflected by the lampblack area and the light source are arranged in a containing hole in the side wall of the lampblack collection cavity of the range hood. The invention further discloses a range hood capable of regulating the wind speed automatically and a wind speed regulating method of the range hood. According to the range hood, the wind speed of a draught fan can be adjusted automatically, operation is convenient, and energy saving is achieved while contamination caused by kitchen lampblack is fully prevented.

The invention discloses a range hood capable of regulating the wind speed automatically. A light emitter and a light receiver are arranged on the side wall of the range hood. The light emitter can emit pulse light towards a lampblack collection cavity of the range hood. The light receiver can receive the light which is emitted by the light emitter and penetrates through a lampblack area or is reflected by the lampblack area. According to the range hood capable of regulating the wind speed automatically, the wind speed of a draught fan can be regulated automatically, operation is convenient, and energy saving is achieved while contamination caused by kitchen lampblack is fully prevented.

The invention discloses a range hood. The range hood comprises a key for starting manual regulation of the wind speed, a key for starting automatic regulation of the wind speed, a light emitter and a light receiver. The light emitter can emit light towards a lampblack collection cavity of the range hood. The light receiver can receive the light which is emitted by the light emitter and penetrates through the lampblack collection cavity or reflected by lampblack in the lampblack collection cavity. After a wind speed regulating command is emitted by the key for manual regulation of the wind speed, the wind speed of the range hood is regulated by according to the wind speed regulation command. After an automatic wind speed regulating command is emitted by the key for starting automatic regulation of the wind speed, the wind speed of the range hood is regulated according to the information of the light which is received by the light receiver and emitted by the light emitter and penetrates through the lampblack in the lampblack collection cavity or is reflected by the lampblack in the lampblack collection cavity. According to the range hood capable of regulating the wind speed automatically, the wind speed of a draught fan can be regulated automatically, operation is convenient, and energy saving is achieved while contamination caused by kitchen lampblack is fully prevented.

The invention discloses an automatic wind speed regulating system for a range hood. The automatic wind speed regulating system for the range hood comprises a lampblack detecting module and a draught fan regulating module. The lampblack detecting module is used for detecting the result of the effect of a lampblack area on light and sending the detection result to the draught fan regulating module or is used for speculating the lampblack concentration information of the lampblack area by means of the detection result and sending a speculation result to the draught fan regulating module. The draught fan regulating module is used for giving out a regulation command to a draught fan according to the detection result or the speculation result sent from the lampblack detecting module. The invention further discloses an automatic wind speed regulating method for the range hood. According the automatic wind speed regulating system for the range hood, the wind speed of the draught fan of the range hood can be regulated automatically, operation is convenient, and energy saving is achieved while contamination caused by kitchen lampblack is fully prevented.

The invention discloses a method for detecting the lampblack concentration of a range hood. The method comprises the steps that the intensity of light penetrating through a lampblack area and the intensity of light, from the same light source as the light penetrating through the lampblack area, reflected by the lampblack area are detected through two light receivers respectively, and the lampblack concentration of the lampblack area or the variation tendency of the lampblack concentration of the lampblack area is judged through the difference value between the light intensities received by the two light receivers. The invention further discloses an automatic wind speed regulating method of the range hood. The automatic wind speed regulating method of the range hood is characterized by comprising the steps that the intensity of the light penetrating through the lampblack area and the intensity, from the same light source as the light penetrating through the lampblack area, of the light reflected by the lampblack area are detected through the two light receivers respectively, and the difference value between the light intensities received by the two light receivers is calculated. The invention further discloses the range hood capable of regulating the wind speed automatically. According to the range hood capable of regulating the wind speed automatically, the wind speed of a draught fan can be regulated automatically, operation is easy, and energy saving is achieved while contamination caused by kitchen lampblack is fully prevented.

The invention discloses a self-checking system for a range hood capable of regulating the wind speed automatically. The self-checking system for the range hood capable of regulating the wind speed automatically comprises a light emitting module, a light receiving module and a judgment module. The light emitting module can emit working light towards a lampblack collection cavity of the range hood. The light receiving module can receive the working light which is emitted by the light emitting module, penetrates through a lampblack area and reflected by the lampblack area. The judgment module obtains the signal value of the working light emitted by the light emitting module and the signal value of the working light received by the light receiving module and conducts equipment fault judgment according to the obtained signal values. The invention further discloses a self-checking method for the range hood capable of regulating the wind speed automatically. According to the range hood capable of regulating the wind speed automatically, it can be guaranteed that the range hood is in a good working state through self-checking, the wind speed of a draught fan can be adjusted automatically, operation is convenient, and energy saving is achieved while contamination caused by kitchen lampblack is fully prevented.

The invention discloses a range hood capable of regulating the wind speed automatically. A light emitter and a light receiver are correspondingly arranged on the side wall of the range hood. The light emitter can emit light towards a lampblack collection cavity of the range hood. The light receiver comprises a light receiver probe which faces the lampblack collection cavity of the range hood. A light shield device extends forwards from at least part of the periphery of the light receiver probe. According to the range hood capable of regulating the wind speed automatically, the wind speed of a draught fan can be adjusted automatically, operation is convenient, and energy saving is achieved while contamination caused by kitchen lampblack is fully prevented.

The invention belongs to the technical field of greenhouse tomato cultivation, and in particular relates to a method for increasing the yield of greenhouse tomatoes in spring by regulating and controlling the ventilation mode. The method measures multiple indexes of greenhouse tomatoes with different ventilation modes, and obtains: Seedling stage: After the tomato seedlings are transplanted slowly, the solar greenhouse adopts the south-north ventilation mode, and closes the top window vents; during the flowering and fruit-setting period: when the daily average cumulative temperature in the solar greenhouse is ≤850-900°C, the top-north ventilation mode is adopted. Close the south window vent; when the daily average cumulative temperature in the solar greenhouse is >850-900°C, adopt the south-north-top ventilation mode; mature picking period: adopt the combined ventilation mode of the south-north-top ventilation mode; The greenhouse microenvironment provides a theoretical basis for improving the quality and yield of tomatoes.

The invention provides a user comfort-based energy-saving control method in a refrigerating mode of an air conditioner. Through monitoring of indoor and outdoor temperature and based on the temperature difference between indoor temperature and set temperature of an energy-saving control mode, the method can control the operation frequency of an inverter compressor, the opening degree of an electronic expansion valve and the wind speed of indoor and outdoor fans more accurately, so that the operation power of a whole air conditioner can be reduced as much as possible on the premise that the user comfort is guaranteed.