JP2008014540A - Air supply ventilation system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air supply ventilation system capable of easily recovering a function of an air filter faced outdoors regardless of elevation. <P>SOLUTION: Three independent air ducts 2, 3, 4 communicating with the inside and outside of a room are constituted, one of the air ducts 2, 3, 4 is provided with the air filter 5 faced outdoors, the other air ducts 3, 4 are provided with electric dampers 6, 7 for opening and closing the air ducts 3, 4, either one of two air ducts 3, 4 is applied as a suction air duct, the other air duct 4 is applied as a blowout air duct provided with a blower 8, the electric damper 7 of the blowout air duct is opened when the electric damper 6 of the suction air duct is closed, the electric damper 7 of the blowout air duct is closed when the electric damper 6 of the suction air duct is opened, and a closing time of the electric damper 6 of the suction air duct is longer than its opening time. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an air supply and ventilation system for ventilating a room by supplying air.

  Some factories, warehouses, gymnasiums, canteens, etc. are provided with an air supply opening for supplying air to the inside, and the air supply opening is provided with a ventilation fan. An air filter is attached to the air supply port so as to collect dust mixed in the outside air sucked in by the ventilation fan. If the air filter is clogged, the air supply rate will decrease, so it is necessary to clean the air filter. The air supply port is often provided at a high place, and it is often difficult to clean the air filter, and the ventilation fan motor is turned in the opposite direction to send the air in the opposite direction to collect it in the air filter. There is also one in which the dust that has been removed is removed (for example, this type of prior art is disclosed in Patent Document 1).

JP-A-5-157300

  In the case of a propeller fan, if the motor of the ventilation fan for supplying air is reversed, a wind in the opposite direction is formed, but the air volume and the wind speed are inevitably reduced compared to the supplying air. Therefore, the dust sucked together with the air supply air and collected by the air filter cannot be easily wiped away by the action of the reverse wind due to the reverse rotation of the electric motor. In order to remove the collected dust neatly, there is a disadvantage that the head wind must be sent over a longer time than that used in the air supply operation.

  The present invention has been made to solve the above-described problems, and the problem is that the function recovery of the air filter facing the outdoors can be easily performed regardless of the height and the low place. It is to provide an air supply and ventilation system, and to improve the usability of the air supply and ventilation system.

  In order to solve the above problems, the present invention comprises three independent air passages that communicate indoors and outdoors, one of the air passages is provided with an air filter that faces the outdoor, and two of the other air passages are provided. An electric damper that opens and closes these air passages is provided, and a blower is provided in the room with one of these two air passages as a suction air passage and the other air passage as a blow-off air passage. When the electric damper of the road is closed, the electric damper of the blowout air passage is opened, and when the electric damper of the suction air passage is opened, the electric damper of the blowout air passage is closed, and the electric damper of the suction air passage is closed. Adopting a means for longer time than opening time.

  According to the present invention, it is possible to blow air having the same air volume and speed characteristics from the direction of dust separation to the air filter regardless of the altitude and the low place, and easily recover the function of the air filter facing the outside. An air supply ventilation system can be obtained.

  The air supply and ventilation system of the present invention is configured as a ventilation system that ventilates indoors such as factories, warehouses, gymnasiums, and canteens by supplying air. This ventilation system is composed of three independent air passages that communicate between the interior and the exterior. One of the air passages is provided with a detachable air filter facing the outdoor. Two other air paths are provided with electric dampers for opening and closing these air paths, respectively. Propeller type blower with one of these two air passages as the suction air passage and the other air passage as the blow air passage is installed in the room, and when the electric damper of the suction air passage is closed, When the electric damper of the air passage is opened and the electric damper of the suction air passage is opened, the electric damper of the blowout air passage is closed so that the time for closing the electric damper of the air intake passage is longer than the opening time. Is set to

  According to this air supply and ventilation system, by closing the electric damper of the suction air passage, opening the electric damper of the outlet air passage and operating the blower, outside air is taken into the room through the air filter and exhausted from the air outlet to the outside. It is possible to perform supply air ventilation. Due to this air supply ventilation, dust accumulates on the outside of the air filter, and when the amount increases, the air supply air volume decreases and the ventilation performance decreases. Therefore, the blower is temporarily stopped, the electric damper of the suction air passage is opened, the electric damper of the blowout air passage is closed, and the blower is operated. As a result, the outside air circulates in the room from the suction air passage having no air filter and low pressure loss, passes through the air filter in the opposite direction, and is exhausted from the air passage to the outside. The dust collected in the air filter by this air flow is shaken off, and the function of the air filter is restored. After cleaning the air filter, return to the desired air supply ventilation operation.

Embodiment 1 FIG.
FIG. 1 is a system configuration diagram showing the supply air ventilation of the supply air ventilation system according to the present embodiment, FIG. 2 is a system configuration diagram showing the air filter function recovery of the supply air ventilation system, and FIG. FIG. 4 is a block diagram showing another control circuit of the air supply and ventilation system. FIG. 4 is a block diagram showing the control circuit of the air ventilation system.

  The air supply and ventilation system of the present embodiment is configured as a ventilation system that ventilates a room 1 such as a factory, a warehouse, a gymnasium, or a dining room by supplying air. In this ventilation system, three independent air passages 2, 3, and 4 that communicate between the interior and the exterior are configured. A removable air filter 5 that faces the outside of the room is provided in one of the air paths 2, 3, and 4. Two of the other air passages 3 and 4 are provided with electric dampers 6 and 7 for opening and closing the air passages 3 and 4, respectively. The room 1 is provided with a propeller-type blower 8 in which one of the two air passages 3 and 4 serves as a suction air passage and the other air passage 4 serves as a blow-off air passage. When the electric damper 6 is closed, the control circuit 9 controls to open the electric damper 7 of the blowout air passage, and closes the electric damper 7 of the blowout air passage when the electric damper 6 of the suction air passage is opened. The control circuit 9 performs control so that the time for closing the electric damper 6 in the suction air passage is longer than the time for opening. The suction air passage is set to have less pressure loss than the air passage 2.

  According to this air supply and ventilation system, the control circuit 9 closes the electric damper 6 in the suction air passage, opens the electric damper 7 in the blowout air passage, and operates the blower 8. As a result, it is possible to perform supply air ventilation in which the outside air is taken into the room through the air filter 5 and exhausted to the outside through the blowout air passage (see FIG. 1). The integrated time of the air supply operation is integrated by the control circuit 9, and when the integrated time exceeds a predetermined value, the ability recovery operation of the air filter 5 is performed by the timed operation by the timer 10 (see FIG. 2). That is, dust accumulates on the outdoor side of the air filter 5 due to the air supply ventilation, and when the amount increases, the air supply air volume decreases and the ventilation performance decreases. Therefore, the blower is temporarily stopped, the electric damper 6 in the suction air passage is opened, the electric damper 7 in the blow-out air passage is closed, and the air filter capacity recovery operation is performed in which the blower 8 is operated. As a result, the outside air is exhausted from the air passage 2 to the outside through the air passage 5 through the air filter 5 in the opposite direction without passing through the air passage 5 without the air filter 5 and passing through the air filter 5 in the opposite direction. The dust collected on the air filter 5 by this airflow is shaken off, and the function of the air filter 5 is restored. When the air filter 5 is cleaned, the control circuit 9 returns the air supply / ventilation system to the operation of the desired air supply / ventilation. The capacity recovery operation time of the air filter 5 is set to be shorter than the air supply ventilation operation time. When shifting to the capacity recovery operation, the accumulated time of the air supply operation is cleared. Note that the ability recovery operation may be performed only at night.

  As shown in FIG. 4, a pressure sensor 11 is provided in the air filter 5, and the output value of the pressure sensor 11 is monitored by the control circuit 9. After the pressure loss of the air filter 5 becomes higher than a predetermined value, You may make it close the electric damper 7 of a blowing air path. In this air supply and ventilation system, the function recovery of the air filter 5 facing outdoors can be easily performed regardless of the height and the low place, and the usability is improved by realizing the automatic operation by the control circuit 9.

It is a system configuration figure showing the time of supply air ventilation of an intake air ventilation system. (Embodiment 1) It is a system configuration figure showing at the time of air filter function recovery of an air supply ventilation system. (Embodiment 1) It is a block block diagram which shows the control circuit of an air supply ventilation system. (Embodiment 1) It is a block block diagram which shows the other control circuit of an air supply ventilation system. (Embodiment 1)

Explanation of symbols

  1 indoor, 2, 3, 4 air path, 5 air filter, 6, 7 electric damper, 8 blower, 10 timer, 11 pressure sensor.

Claims (3)

  Three independent air passages connecting the inside and outside of the room are configured, one of these air passages is provided with an air filter facing the outside, and the other two air passages are electric dampers that open and close these air passages. When a blower is provided in the room with one of these two air passages as a suction air passage and the other air passage as a blow-off air passage, and when the electric damper of the suction air passage is closed When the electric damper of the blowout air passage is opened and the electric damper of the suction air passage is opened, the electric damper of the blowout air passage is closed and the electric damper of the suction air passage is closed. Air supply and ventilation system that lasts longer than the time it opens.   It is an air supply ventilation system of Claim 1, Comprising: The air supply ventilation system which controlled the opening / closing operation | movement of two electric dampers with the timer.   It is an air supply ventilation system of Claim 1, Comprising: The air supply ventilation system which closed the electric damper of the blowing air path for a predetermined period, after the pressure loss of an air filter became higher than predetermined.

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