30results about How to "Constant air volume" patented technology

An exhaust system for exhausting air from a space includes a variable-volume exhaust air moving system having at least one fan having an inlet and an outlet. A duct is connected to the inlet and an outlet nozzle defining a variable cross-sectional outlet area is fluidly connected to the outlet. A selectively operable bypass damper is fluidly connected to the inlet. A sensor is located in the exhaust system for detecting at least one of a pressure condition and a flow condition therein. A control system controls the at least one fan, the outlet nozzle, and the bypass damper, based on a signal sent from the sensor.

The invention provides a method for determining remaining time of cleaning a filter screen in air feeding equipment. The air feeding equipment comprises the filter screen and an air feeding fan; and the filter screen is arranged on an air flue of the air feeding fan. The method comprises the following steps of regulating the rotation speed of the air feeding fan according to a current change condition of the air feeding fan, and enabling air quantity output of the air feeding equipment to be constant; and determining remaining time of cleaning the filter screen according to the rotation speed increase rate of the air feeding fan. The method provided by the invention can be used for detecting filth blockage degree of the filter screen in real time, so that remaining time is determined; and moreover, the rotation speed of the fan can be increased according to the filth blockage degree of the filter screen to ensure constant air quantity output by the system, and therefore, a comfortable environment is provided for a user. The invention further provides a control method for the air feeding equipment and the air feeding equipment.

The invention discloses a constant air volume control method of an air conditioner. The air conditioner comprises an air pressure sensor; the constant air volume control method of the air conditionerincludes steps of detecting current air pressure of an air outlet of the air conditioner through the air pressure sensor, acquiring the target air volume set by a user; calculating the current air volume according to current air pressure, and calculating the air volume differential value between the current air volume and the standard air volume; correspondingly controlling the motor rotate speedof the air conditioner according to the differential value of the air volume, thereby keeping the constant air volume of the air conditioner. The invention further discloses an air conditioner and a computer readable storage medium. According to the constant air volume control method of the air conditioner, the air conditioner and the computer readable storage medium, the constant air volume control of an indoor air conditioner is realized, and the cooling and heating effects of the air conditioner are improved.

To operate the air circulation and convey the stock flow of scrap material comminuted in the housing (1) of a hammer mill, the airflow generated by the blower effect of a rotor (2) and the stock flow passing through an upper classifying grate (4) are diverted by a deflector hood (8) and guided vertically downwards into a duct (6) that is separate from the housing (1). The stock flow is combined with the stock flow classified in the area of a lower classifying grate (5). The air flow is then guided in the circulating air and the combined stock flow is conveyed to a device (11) for further processing, sorting and/or conveyance.

Provided are an outdoor electronic newspaper stand and a fast cooling device of the outdoor electronic newspaper stand. The cooling device comprises a first face plate, a second face plate, a third face plate, a fourth face plate, an air supply opening, an air return opening, an air inlet, an air outlet and a heat exchange component. The first face plate and the second face plate are opposite, the third face plate and the fourth face plate are opposite, and the third face plate and the fourth face plate are adjacent to the first face plate and the second face plate. The air supply opening is formed in the first face plate and is close to the fourth face plate, the air return opening is formed in the first face plate and is close to the third face plate, the air inlet is formed in the second face plate and is close to the fourth face plate, the air outlet is formed in the second face plate, and the heat exchange component is arranged between the first face plate and the second face plate. According to the technical scheme, the fast cooling device is low in power consumption and low in cost, and a condensation phenomenon cannot occur when electronic equipment is cooled.

The invention relates to an area control method, device and system and an air conditioning system. The area control method comprises the steps that when adjusting areas requiring for opening an air valve exist, an air valve controller can obtain the total length of air pipes corresponding to all the adjusting areas at the moment, and obtain the static pressure of an air pipe unit required for thesimultaneous supply of air in the current number of adjusting areas according to the total length of the air pipes; and a static pressure change value is obtained by analyzing the static pressure of the air pipe unit and the corresponding preset static pressure, and the static pressure change value is sent to the air pipe unit, so that the air pipe unit conveniently carries out air supply regulation and corrects the air supply quantity of the air pipe unit at the moment according to the static pressure change value, and realizes the operation of supplying air for a user with constant air quantity. According to the scheme, the air supply quantity of each adjusting area can be constant, the situation that the air supply quantity is increased or decreased due to the changes of the air pipes for supplying air of the air pipe unit is avoided, and the control reliability is high.

The invention discloses a device for controlling the air supply volume of a purification system of a clean area. The device comprises an air conditioning cabinet, a static pressure sensor, a high-efficiency filter and a PLC or DDC system, wherein the air conditioning cabinet comprises a variable-frequency fan and is used for regulating and controlling the air supply volume, the static pressure sensor is used for detecting static pressure of each clean room, the high-efficiency filter is used for filtering air entering each clean room; and the PLC or DDC system is in signal connection with the air conditioning cabinet and the static pressure sensor and is used for adjusting the frequency of the variable-frequency fan according to the static pressure, detected by the static pressure sensor, of each clean room so as to regulate and control the air supply volume. The invention further relates to a method for controlling the air supply volume of the purification system of the clean area. The method is characterized in that the method adopts the device; and return air of the clean room is constant, and the air supply volume of the purification system of the clean area is controlled by associating the static pressure of the clean room with the frequency of the variable-frequency fan of the air conditioning cabinet. The device and the method have the advantages that the air supply volume of the system can be simply and effectively constant; and the ventilation rate of each clean room and the relative pressure difference between the clean rooms can be stabilized.

The invention relates to an air purifying device and a control method thereof. The control method includes: acquiring an air volume value and a noise value; before the noise value is larger than a target noise value, controlling an air supply module according to the air volume value and a first target air volume value to keep the air volume at an air supply port at the first target air volume value; after the noise value is larger than a target noise value, controlling the air supply module according to the noise value and the target noise value to keep noise generated by the air purifying device at the target noise value, and judging whether the air volume value is smaller than a second target air volume value or not; if the air volume value is smaller than the second target air volume value, judging that a filter module loses a filtering function. The air supply volume of the air purifying device can be controlled according to the noise value, constant air supply volume of the air purifying device can be guaranteed as far as possible, noise increasing of the air purifying device is inhibited as far as possible under a high-noise condition while large air supply volume is realized, and accordingly a comfortable living and working environment can be provided for users.

The invention discloses an air volume detecting and adjusting device which comprises a smoke outlet channel, an air pressure detecting device, a plain-end air pressure sampling nozzle and an inclined-end air pressure sampling nozzle, and the smoke outlet channel is provided with a vertical detecting section; the plain-end air pressure sampling nozzle is provided with a first air inlet end and a first air outlet end, the first air outlet end is connected with the air pressure detection device, the first air inlet end extends into the vertical detection section, and the first air inlet end is provided with a first air inlet; a bevel wind pressure sampling nozzle is provided with a second air inlet end and a second air outlet end, the second air outlet end is connected with the wind pressuredetection device, the second air inlet end extends into the vertical detection section, the second air inlet end is provided with a second air inlet, and the second air inlet and the first air inlet are formed in the same horizontal plane. The air volume detecting and adjusting device is adopted in the water heater, under the control of a constant air volume detecting and adjusting method, the influence of atmospheric pressure changes caused by different environments, altitudes and regions can be avoided, pressure changes in the smoke channel can be detected in real time, and the combustion working condition is adjusted according to the actual situation.

The invention discloses a ventilation system capable of achieving a constant air outlet state and a ventilation unit, and belongs to the technical field of ventilation systems. The ventilation system comprises a ventilation host, a fresh air inlet channel and a dirty air outlet channel are arranged on the two sides in the ventilation host respectively, draught fans are fixedly installed on the rear side in the fresh air inlet channel and the front side in the dirty air outlet channel respectively, a current detection unit which is used for detecting the current values of the draught fans and a control unit which is used for judging and adjusting the current values of the draught fans are further fixedly installed on one side of the ventilation host, and a plurality of filter screens are installed on the front side in the fresh air inlet channel at equal intervals through a lower filter screen installation frame and an upper filter screen installation frame and used for carrying out multiple filtering on impurities in fresh air. According to the ventilation system, the ventilation quantity of fresh air entering the plurality of filter screens in the channel is maintained through washing, the current values of the draught fans are detected and judged, then the power of the draught fans is adjusted to be constant, and finally the fresh air outlet quantity of the ventilation system is constant.

The invention relates to a noise-based control method of an air purification device and an air purification device. Specifically, the control method comprises the following steps: detecting the noisegenerated by the air purification device by using a noise detection module to obtain a noise value; detecting the air volume at the air supply port by using an air volume detection module to obtain the air volume value; after the noise value is greater than the target noise value for the Nth time, controlling an air supply module according to the air volume value and the Nth target air volume value, so that the air volume at the air supply port is maintained at the Nth target air volume value, and N is a natural number greater than or equal to 1; and when N is greater than 1, the Nth target air volume value is less than the Nth-1 target air volume value. The air supply volume of the air purification device can be controlled according to the noise value, the air supply volume of the air purification device can be ensured to be constant as far as possible, the noise generated by the air purification device can be reduced, and a comfortable living and working environment can be provided for the user.

A control method of constant-air-volume split fresh air comprises the following steps of (1) starting a fresh air fan, and setting a running air volume; (2) calculating a fresh air volume and an exhaust air volume ratio; (3) adjusting the rotating speed of each fan in a fresh air system according to the ratio of the fresh air volume; (4) inspecting, by the sensor, the cleanliness of a filter screen, wherein if the cleanliness of the filter screen meets a set value, the air inlet fan works normally; (5) detecting the air inlet amount of an air inlet fan, wherein if the set air volume is met, the fan of the fresh air works normally, and if the set air volume is not met, a signal is sent to an air feeder, and the rotating speed of the air feeder is adjusted; (6) if the cleanliness of the filter screen does not meet the set value in the step (4), adjusting the rotating speed of the air inlet fan and the rotating speed of the air feeder at the same time; and (7) adjusting the rotating speedof the exhaust fan according to the proportion of the exhaust air volume. The air volume can be more accurately controlled by the control method, and the power of a fresh air system can be effectively reduced.