JP2019007640A - Ventilation system - Google Patents

Abstract

To provide a ventilation system capable of recovering dust collection capacity of a filter.SOLUTION: A ventilation device includes: an air supply fan 6 forming a supply air current; an air exhaust fan 7 forming an exhaust air current; a casing 20 having an air supply passage 21 for flowing the supply air current and an air exhaust passage 22 for flowing the exhaust air current; and a filter 5 disposed upstream of the air supply fan 6 in the air supply passage 21. The casing 20 includes: a bypass passage 8 for connecting a portion between the filter 5 and the air supply fan 6 in the air supply passage 21 and a portion on the downstream side of the air exhaust fan 7 in the air exhaust passage 22; an air supply passage damper 9 moving between a position opening the bypass passage 8 and closing the air supply passage 21 on the downstream side of the bypass passage 8 and a position closing the bypass passage 8 and opening the air supply passage 21; and an air exhaust passage damper 10 moving between a position opening the bypass passage 8 and closing the air exhaust passage 22 on the downstream side of the bypass passage 8 and a position closing the bypass passage 8 and opening the air exhaust passage 22.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a ventilation system including a filter that removes dust contained in outside air.

  In a ventilation system employed in a house, in order to prevent dust contained in the outside air from entering the room, it is common to supply the air after passing the outside air through a filter.

  When the ventilation system as described above is operated for a certain period of time, the filter is clogged with dust and the airway pressure loss increases, and the original ventilation capacity cannot be maintained.

  In the invention disclosed in Patent Document 1, the filter is installed to be inclined with respect to the air passage, so that the area of the filter is made larger than the cross-sectional area of the air passage to improve the collection performance, and the filter has dust. Is difficult to deposit.

JP 2010-243030 A

  However, although the invention disclosed in Patent Document 1 can collect more dust than when using a filter having the same area as the cross-sectional area of the air passage, the amount of dust that can be collected is determined by the size of the filter. It will not change. In other words, in the invention disclosed in Patent Document 1, dust is clogged in the filter and ventilation capacity is reduced, power consumption is increased, and noise is increased. Therefore, the invention disclosed in Patent Document 1 requires periodic filter maintenance.

  This invention is made | formed in view of the above, Comprising: It aims at obtaining the ventilation system which can recover the dust collection capability of a filter.

  In order to solve the above-described problems and achieve the object, the present invention provides an air supply fan that takes in outside air to form a supply air flow, an exhaust fan that takes in indoor air and forms an exhaust flow, an air supply fan, and The housing includes an exhaust fan, an air supply path through which an air supply air flows, and an exhaust path through which the exhaust air flows, and a filter installed upstream of the air supply fan in the air supply path. The housing opens the bypass path connecting the portion between the filter of the air supply path and the air supply fan, and the downstream portion of the exhaust path of the exhaust fan, and the air supply path side of the bypass path. An air supply path damper that moves between a position that closes the air supply path downstream of the bypass path and a position that closes the air supply path side of the bypass path and opens the air supply path, and an exhaust path side of the bypass path And an exhaust path damper that moves between a position that closes the exhaust path downstream of the bypass path and a position that closes the exhaust path side of the bypass path and opens the exhaust path.

  According to this invention, there exists an effect that the ventilation system which can recover the dust collection capability of a filter can be obtained.

The figure which shows the structure of the ventilation system which concerns on Embodiment 1 of this invention. The figure which shows the state at the time of the maintenance driving | operation of the ventilation system which concerns on Embodiment 1. The flowchart which shows the flow of operation | movement of the ventilation system which concerns on Embodiment 1. FIG. The figure which shows the structure which implement | achieved the function of the control apparatus of the ventilation system which concerns on Embodiment 1 with hardware. The figure which shows the structure which implement | achieved the function of the control apparatus of the ventilation system which concerns on Embodiment 1 with software.

  Below, the ventilation system concerning an embodiment of the invention is explained in detail based on a drawing. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
FIG. 1 is a diagram showing a configuration of a ventilation system according to Embodiment 1 of the present invention. The ventilation system 50 includes an outdoor air supply port 1 that takes in outside air, an indoor air supply port 2 that supplies outside air into the room, an indoor exhaust port 3 that takes in indoor air, and an outdoor exhaust port 4 that exhausts indoor air to the outside. A housing 20 is provided. The housing 20 includes an air supply path 21 from the outdoor air supply port 1 to the indoor air supply port 2 and an exhaust path 22 from the indoor exhaust port 3 to the outdoor air exhaust port 4. The air supply path 21 and the exhaust path 22 are independent air paths. A filter 5 is installed in the air supply path 21 immediately after the outside air supply port 1. The housing 20 houses the air supply fan 6 and the exhaust fan 7. An air supply fan 6 is installed on the downstream side of the filter 5 in the air supply path 21. An exhaust fan 7 is installed in the exhaust path 22 immediately after the indoor exhaust port 3. The casing 20 is provided with a bypass path 8 that connects a portion of the air supply path 21 between the filter 5 and the air supply fan 6 and an area between the exhaust fan 7 of the exhaust path 22 and the outside air exhaust port 4. ing. The housing 20 includes an air supply path damper 9 that opens and closes the air supply path 21 side of the bypass path 8 and an exhaust path damper 10 that opens and closes the exhaust path 22 side of the bypass path 8.

  The air supply path damper 9 opens the air supply path 21 side of the bypass path 8, closes the air supply path 21 downstream of the bypass path 8, and closes the air supply path 21 side of the bypass path 8. It moves between positions where the air path 21 is opened. The exhaust path damper 10 opens the exhaust path 22 side of the bypass path 8, closes the exhaust path 22 downstream of the bypass path 8, closes the exhaust path 22 side of the bypass path 8, and opens the exhaust path 22. Move between positions.

  The operation of the air supply fan 6 and the exhaust fan 7 is controlled by the control device 11. The air supply path damper 9 and the exhaust path damper 10 are controlled by the control device 11.

  The ventilation system 50 shown in FIG. 1 shows a state during ventilation operation. During the ventilation operation, the control device 11 closes the bypass path 8 in the supply path damper 9 and the exhaust path damper 10. Therefore, the air supply path 21 from the outdoor air supply port 1 to the indoor air supply port 2 and the exhaust path 22 from the indoor exhaust port 3 to the outdoor air exhaust port 4 are opened. The control device 11 operates the air supply fan 6 and the exhaust fan 7 in a state where the air supply path 21 and the exhaust path 22 are formed, and starts the ventilation operation. During the ventilation operation, outside air is taken into the housing 20 from the outside air inlet 1, dust 12 contained in the outside air is filtered by the filter 5, and outside air is supplied into the room from the indoor inlet 2. Therefore, the amount of dust 12 accumulated in the filter 5 increases as the ventilation operation time length increases. Further, as the amount of the dust 12 contained in the outside air increases, the amount of the dust 12 accumulated in the filter 5 increases.

  FIG. 2 is a diagram illustrating a state during a maintenance operation of the ventilation system according to the first embodiment. In the ventilation system according to Embodiment 1, the maintenance operation is an operation for reducing the maintenance of the filter 5. When it is determined that the maintenance operation needs to be performed, the control device 11 temporarily stops the operation of the air supply fan 6 and the exhaust fan 7. The control device 11 moves the air supply path damper 9 to a position where the air supply path 21 is blocked downstream of the air supply fan 6. Further, the control device 11 moves the exhaust path damper 10 to a position where the exhaust path 22 is blocked downstream of the bypass path 8. The air supply path damper 9 closes the air supply path 21 on the downstream side of the air supply fan 6, and the exhaust path damper 10 closes the exhaust path 22 on the downstream side of the bypass path 8. 7, a maintenance path 23 that reaches the outside air inlet 1 through the bypass path 8 and the filter 5 is formed. After the maintenance path 23 is formed, the control device 11 operates the exhaust fan 7. When the exhaust fan 7 is operated, an airflow opposite to the airflow flows on the upstream side of the bypass path 8 of the air supply path 21. Accordingly, wind is blown to the filter 5 in the direction opposite to that during the ventilation operation, and the dust 12 accumulated in the filter 5 is discharged to the outside via the outside air supply port 1.

  As described above, the control device 11 arranges the air supply path damper 9 and the exhaust path damper 10 at a position where the bypass path 8 is closed, and operates the air supply fan 6 and the exhaust fan 7, and the air supply path 21. The air supply path damper 9 is disposed at a position where the exhaust path 22 is closed, the exhaust path damper 10 is disposed at a position where the exhaust path 22 is closed, and the maintenance operation for operating the exhaust fan 7 is switched.

  FIG. 3 is a flowchart showing a flow of operation of the ventilation system according to the first embodiment. In step S1, the control device 11 receives an operation start operation. In step S2, the control device 11 controls the air supply path damper 9 and the exhaust path damper 10 to open the air supply path 21 and the exhaust path 22, and then operates the air supply fan 6 and the exhaust fan 7 to perform ventilation. Do the driving. In step S3, the control device 11 determines whether or not there has been a stop operation. If there is no operation stop operation, it will become No in step S3 and will progress to step S4. If there is an operation for stopping the operation, Yes in step S3, the process proceeds to step S5.

  In step S4, the control device 11 determines whether or not the operation time has reached the set time. If the operating time has reached the set time, Yes in step S4, the process proceeds to step S5. If the operation time has not reached the set time, No is returned in step S4, and the process returns to step S2.

  In step S <b> 5, the control device 11 controls the air supply path damper 9 and the exhaust path damper 10 to maintain the maintenance path from the indoor exhaust port 3 to the outside air supply port 1 through the exhaust fan 7, the bypass path 8 and the filter 5. After forming 23, the exhaust fan 7 is operated to perform a maintenance operation. Moreover, the control apparatus 11 resets the timer used for measurement of driving time.

  In step S6, the control device 11 determines whether or not to continue the ventilation operation. When continuing ventilation operation, it becomes Yes at Step S6 and returns to Step S2. Moreover, when not continuing ventilation operation, it becomes No by step S6 and operation | movement is complete | finished.

  The ventilation system 50 according to Embodiment 1 can remove the dust 12 accumulated in the filter 5 by performing a maintenance operation, and can discharge the dust from the outside air supply port 1 to the outside. That is, the ventilation system 50 according to the first embodiment can restore the dust collecting ability of the filter 5. Therefore, the ventilation system 50 according to the first embodiment can reduce the frequency of maintenance such as cleaning and replacement of the filter 5 and can prevent the ventilation capacity from being lowered.

  The function of the control device 11 of the ventilation system 50 according to the first embodiment is realized by a processing circuit. That is, the control device 11 includes a processing circuit that performs processing for switching between the ventilation operation and the maintenance operation. The processing circuit may be dedicated hardware or an arithmetic device that executes a program stored in the storage device.

  If the processing circuit is dedicated hardware, the processing circuit may be a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an application specific integrated circuit, a field programmable gate array, or a combination thereof Is applicable. FIG. 4 is a diagram illustrating a configuration in which the function of the control device of the ventilation system according to the first embodiment is realized by hardware. The processing circuit 19 incorporates a logic circuit 19a that realizes processing for switching between ventilation operation and maintenance operation.

  When the processing circuit 19 is an arithmetic device, the process of switching between the ventilation operation and the maintenance operation is realized by software, firmware, or a combination of software and firmware.

  FIG. 5 is a diagram illustrating a configuration in which the function of the control device of the ventilation system according to the first embodiment is realized by software. The processing circuit 19 includes an arithmetic device 191 that executes the program 19b, a random access memory 192 that the arithmetic device 191 uses as a work area, and a storage device 193 that stores the program 19b. When the arithmetic device 191 develops and executes the program 19b stored in the storage device 193 on the random access memory 192, processing for switching between the ventilation operation and the maintenance operation is realized. Software or firmware is described in a program language and stored in the storage device 193. The arithmetic unit 191 can be exemplified by a central processing unit, but is not limited thereto.

  The processing circuit 19 implements each process by reading and executing the program 19b stored in the storage device 193. That is, the control device 11 includes a storage device 193 for storing a program 19b that, when executed by the processing circuit 19, results in the step of switching between the ventilation operation and the maintenance operation. The program 19b can also be said to cause a computer to execute the above procedures and methods.

  In addition, about the process which switches ventilation operation and maintenance operation, a part may be implement | achieved by exclusive hardware and a part may be implement | achieved by software or firmware.

  As described above, the processing circuit 19 can realize the above-described functions by hardware, software, firmware, or a combination thereof.

  The configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

  1 outdoor air supply port, 2 indoor air supply port, 3 indoor exhaust port, 4 outdoor air exhaust port, 5 filter, 6 air supply fan, 7 exhaust fan, 8 bypass route, 9 air supply route damper, 10 exhaust route damper, DESCRIPTION OF SYMBOLS 11 Control apparatus, 12 Dust, 19 Processing circuit, 19a Logic circuit, 19b Program, 20 Case, 21 Air supply path, 22 Exhaust path, 191 Arithmetic unit, 192 Random access memory, 193 Storage device.

Claims (4)

An air supply fan that takes in outside air to form a supply airflow;
An exhaust fan that takes in indoor air and forms an exhaust flow;
A housing that houses the air supply fan and the exhaust fan, and has an air supply path through which the air supply air flows and an exhaust path through which the exhaust air flows;
A filter installed upstream of the air supply fan of the air supply path,
The housing includes a bypass path connecting a portion of the air supply path between the filter and the air supply fan and a part of the exhaust path downstream of the exhaust fan, and the bypass path Moves between a position where the air supply path side is opened and the air supply path is closed downstream of the bypass path, and a position where the air supply path side of the bypass path is closed and the air supply path is opened. An air supply path damper, a position where the exhaust path side of the bypass path is opened and the exhaust path is closed downstream of the bypass path, and the exhaust path side of the bypass path is closed and the exhaust path is closed A ventilation system comprising: an exhaust path damper that moves between open positions. A ventilation operation in which the air supply path damper and the exhaust path damper are disposed at a position to block the bypass path, and the air supply fan and the exhaust fan are operated;
The air supply path damper is disposed at a position that closes the air supply path, the exhaust path damper is disposed at a position that closes the exhaust path, and a control device that switches between a maintenance operation that operates the exhaust fan is provided. The ventilation system according to claim 1.   The ventilation system according to claim 2, wherein the control device performs the maintenance operation when an operation time of the ventilation operation reaches a set time.   The ventilation system according to claim 2, wherein the control device performs the maintenance operation after stopping the ventilation operation.

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