JP2014134367A - Ventilation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ventilation system capable of facilitating maintenance by ensuring capturing bugs and powder dust contained in outdoor air.SOLUTION: A ventilation system includes: a ventilator 1, provided in a ceiling 3, for total enthalpy heat exchange between outdoor air OA to be supplied and an indoor air RA to be discharged; and a filter box 2, arranged in a room, for storing therein filters. The filter box 2 includes a first storage chamber 24 for storing an outdoor air filter 23 made of a bag-shaped filter material having an upper end opening. The outdoor air filter 23 is configured so that an upper end opening edge is attached to a first filter attachment portion 24c for introducing the outdoor air OA from the upper end opening into the bag-shaped filter material, filtering the outdoor air OA by the bag-shaped filter material, and discharging the filtered outdoor air OA to outside of the bag-shaped filter material, and so as to be easily detachable from the first filter attachment portion 24c with dust held in the bag-shaped filter material by pulling out the bag-shaped filter material downward.

Description

  The present invention relates to a ventilation system including a ventilator for exchanging total heat between outside air to be supplied and indoor air to be exhausted, and more particularly, to a ventilation system including a filter box for storing a filter separately from the ventilator.

  Patent Document 1 describes an example of a conventional ventilation system. This ventilation system includes a ventilator that exchanges total heat between outside air to be supplied and room air to be exhausted, an outside air filter that removes dust in the outside air to be supplied, and an inside air filter that removes dust in the room air to be exhausted And a box structure containing the. In addition, a ventilation device with a low maintenance frequency is installed behind the ceiling, and a box structure with a high maintenance frequency is placed in a room that is accessible. The ventilation device and the box structure are connected by a duct between the ventilation device and the indoor or outdoor inlet or outlet, and between the box structure and the indoor or outdoor inlet or outlet. Yes.

  The reason why the box structure is arranged in the room is to make maintenance easy and easy. Further, the box structure is configured to insert and remove the filter in the lateral direction.

JP 2007-187408 A

  Conventional ventilation systems generally use an outside air filter as described above. However, since the outside air contains insects and dust, the inside wall of the storage room for storing the outside air filter and the filtration of the outside air filter during ventilation operation are used. Insects and dust sometimes adhered to the surface. In addition, since the conventional ventilation system is configured to replace the filter by removing and inserting the filter in the horizontal direction, there is a risk that insects and dust adhering to the filtration surface of the filter may be dispersed during the filter replacement operation. there were. For this reason, in the conventional ventilation system, the maintenance of the filter storage chamber and the wall surface of the filter storage chamber are required as maintenance in addition to the filter replacement.

  An object of the present invention is to solve such a problem in the prior art and to provide a ventilation system that facilitates maintenance by reliably capturing insects and dust contained in the outside air.

  The ventilation system according to the present invention solves such a problem, and is provided with a total heat exchanger that performs total heat exchange between the outside air to be supplied and the indoor air to be exhausted. A ventilation system comprising: a device; and a filter box installed in the room, the filter box having a first storage chamber for storing an outside air filter for removing dust in the outside air conveyed to the ventilation device, The first storage chamber has a first introduction port for introducing outside air on the upper surface, and a first filter mounting portion communicating with the first introduction port protrudes inward from the upper surface. And a first outlet for sending outside air after passing through the outside air filter to the ventilator, wherein the outside air filter is made of a bag-like filter medium having an upper end opening, and the mounting structure of the outside air filter is In the state where the first filter attachment portion is inserted into the upper end opening of the bag-like filter medium, the upper end opening edge of the bag-like filter medium is attached to the first filter attachment portion, and the attached bag-like filter medium By pulling downward, the bag-like filter medium is configured to be removed from the first filter attachment portion while holding the dust inside.

  According to such a configuration, outside air is introduced into the inside of the bag-shaped filter medium from the upper end opening, and after being filtered by this bag-shaped filter medium, is sent to the outside of the bag-shaped filter medium. Dust and insects inside are trapped. Accordingly, during the ventilation operation, the first storage chamber in which the outside air filter is installed becomes a passage for outside air after being filtered by the outside air filter, so that the first storage chamber is not contaminated by dust, insects, and other dust. Keep clean. The outside air filter is made of a bag-like filter medium having an upper end opening, and the attachment structure of the outside air filter is attached to the first filter attaching portion with the first filter attaching portion being inserted into the upper end opening. By pulling the bag-shaped filter medium downward, it is possible to easily remove the dust from the first filter mounting portion while the dust is accumulated in the bag-shaped filter medium. Therefore, there is less risk of dust being dispersed when the outside air filter is replaced. Moreover, since the contamination of the first storage chamber of the outside air filter can be reduced during the ventilation operation and when the filter is replaced as described above, the cleaning effort can be reduced.

  The filter box includes a first inspection port for maintaining the outside air filter on one side surface of the first storage chamber, and a service door that opens and closes the first inspection port. May be formed with a first viewing window through which the outside air filter can be observed with the naked eye.

  According to such a configuration, the outside air filter can be observed from the outside with the naked eye through the first viewing window without opening the service lid. If it is difficult to determine whether or not the outside air filter needs to be replaced only by observation with the naked eye, it is possible to determine whether or not the outside air filter needs to be exchanged by opening the service lid and touching the outside air filter directly.

In addition, the first storage chamber may be provided with a scale for identifying the replacement time based on the bulging state of the outside air filter at a position where it can be seen from the first inspection window.
According to such a configuration, it is possible to confirm the replacement time of the filter by visual observation from the viewing window of the service lid. In addition, since the trouble of opening and closing the service lid can be saved, the number of maintenance steps can be reduced.

  In addition, the filter box includes a second storage chamber for storing an indoor air filter for removing dust in the indoor air conveyed to the ventilation device, and the second storage chamber has a second inspection port on one side surface. The first storage chamber and the second storage chamber are arranged in a horizontal direction so that the inspection ports of both chambers are adjacent to each other, and the service door opens and closes the inspection ports of both chambers simultaneously. It may be formed.

  According to such a configuration, the filter box can be combined into one for the inside air filter and one for the outside air filter, which is beneficial for cost reduction. In addition, the maintenance of the inside air filter can be performed at a position that can be reached indoors. In addition, since the service door is used for both the outside air filter and the inside air filter, the cost is reduced. Moreover, since the inspection and maintenance of both the outside air filter and the inside air filter can be performed by opening and closing one service door, the maintenance work can be reduced.

The service door may have a second viewing window through which the inside air filter can be observed from the outside.
According to such a configuration, similarly to the outside air filter, the clogged state of the inside air filter can be observed from the outside.

  The filter box has a second introduction port for introducing room air on the top surface, and a second filter mounting portion communicating with the second introduction port protrudes inward from the top surface, and further, after passing through the inside air filter. A second delivery port for sending room air to the ventilator is provided on the side surface, and the inside air filter is formed to have the same specifications as the outside air filter and can be attached and detached in the same manner as the outside air filter. You may be made to do.

  According to such a configuration, it is possible to achieve common parts for the outside air filter and the inside air filter, and it is possible to reduce the cost. In addition, since the handling of the outside air filter and the handling of the inside air filter are the same, the contamination of the second storage chamber due to dust or the like is reduced, and the burden of the maintenance work is reduced due to the familiarity of the maintenance work.

Further, the inside air filter may have a deodorizing filter.
According to such a configuration, it is possible to avoid the odor generated in the room from being scattered in the vicinity. Therefore, it is useful as a ventilation system capable of recovering heat for restaurants, printing factories and the like that may generate odors.

  According to the ventilation system of the present invention, it is possible to reduce the contamination of the storage chamber of the outside air filter during the ventilation operation and when the filter is replaced. In addition, it is easy to replace the outside air filter.

1 is an overall configuration diagram of a ventilation system according to Embodiment 1. FIG. It is a front view of the filter box in the ventilation system. It is the state figure which opened the service door of the filter box. It is an enlarged view of the attachment part of a bag-shaped filter medium in the filter box. It is an explanatory view of the attachment procedure of the outside air filter in the filter box, (a) is a state diagram before fitting the elastic ring into the bag-shaped filter medium and the bag-shaped filter medium, (b) is an elastic ring to the bag-shaped filter medium (C) is an attachment explanatory drawing for attaching a bag-like filter medium fitted with an elastic ring to a filter attachment portion. It is explanatory drawing of the removal procedure of the bag-shaped filter medium in the filter box. It is a top view of the scale attached to the filter box. It is a whole block diagram of the ventilation system which concerns on Embodiment 2. FIG. It is an enlarged view of the attachment part of a bag-shaped filter medium based on a modification.

(Embodiment 1)
As shown in FIG. 1, the ventilation system according to Embodiment 1 includes a ventilation device 1 that performs total heat exchange between room air RA to be exhausted and outside air OA to be supplied, and a filter that removes dust in the air. The filter box 2 is housed. The ventilation device 1 with a low maintenance frequency is installed on the ceiling 3, and the filter box 2 with a high maintenance frequency is installed on a floor surface or a wall surface at a position where the hand can reach indoors. Specifically, the filter box 2 is installed in a machine room 5 adjacent to the room 4.

  The outer wall surface of the ceiling back 3 is provided with an intake 6 for taking in outside air OA and an outlet 7 for exhausting indoor air RA as exhaust EA to the outside. A blowout port 8 is provided for blowing the outside air OA into the room 4 as the air SA, and a ventilation port 9 for discharging the room air RA is provided on the wall surface. The ventilation port 9 includes a grill 9a on the indoor 4 side and a duct connection port 9b on the back side.

  As shown in FIG. 1, the ventilator 1 includes a total heat exchanger 12 inside the box-shaped casing 11 for performing total heat exchange between the indoor air RA to be exhausted and the outside air OA to be supplied. An air supply path 13 and an exhaust path 14 are formed before and after the total heat exchanger 12. In addition, an air supply fan 15 is installed in the passage 13 a after passing through the total heat exchanger in the air supply path 13, and an exhaust fan 16 is installed in the passage 14 a after passing through the total heat exchanger in the exhaust path 14.

  Further, the ventilation device 1 connects the first connection port 13b for connecting the inlet duct 31 of the air supply system, the second connection port 13c for connecting the outlet duct 32 of the air supply system, and the inlet duct 33 of the exhaust system. A third connection port 14b and a fourth connection port 14c for connecting the outlet duct 34 of the exhaust system are provided. The inlet duct 31, the outlet duct 32, the inlet duct 33, and the outlet duct 34 are each a flexible duct having a circular cross section, and the first connection port 13b, the second connection port 13c, the third connection port 14b, and the fourth connection. The opening 14c is formed as a duct connection opening for connecting flexible ducts each having a circular cross section. Also, the outlet duct 32 of the air supply system is connected to the air outlet 8 for blowing the outside air OA into the room 4 as the air supply SA, and the outlet duct 34 of the exhaust system exhausts the room air RA to the outside as the exhaust EA. Is connected to a discharge port 7 for the purpose.

  As shown in FIGS. 2 and 3, the filter box 2 has a box-shaped casing 21. The inside of the box-shaped casing 21 is divided into two substantially equally in the horizontal direction by a flat partition plate 22. One chamber is a first storage chamber 24 that stores an outside air filter 23 for removing dust in the outside air OA sent to the ventilator 1, and the other chamber is in the room air RA sent to the ventilator 1. It is set as the 2nd storage chamber 26 which stores the inside air filter 25 for removing the dust. Thus, the first storage chamber 24 and the second storage chamber 26 are adjacent to each other in the horizontal direction with the partition plate 22 interposed therebetween.

  The first storage chamber 24 includes a first introduction port 24a for introducing outside air on the upper surface, and a first outlet 24b for sending outside air after dust is removed by the outside air filter 23 to the ventilator 1. Provided on the side. The first introduction port 24a and the first delivery port 24b are each formed as a duct connection port for connecting a flexible duct having a circular cross section. The first introduction port 24a is connected to the intake port 6 for taking in the outside air OA by the outside air introduction duct 35 of the supply system, and the first delivery port 24b is connected to the ventilation device 1 by the inlet duct 31 of the aforementioned supply system. Is connected to the first connection port 13b. The outside air introduction duct 35 is a flexible duct having a circular cross section.

  The second storage chamber 26 includes a second introduction port 26 a for introducing the room air RA on the upper surface, and a second room for sending the room air RA after dust is removed by the room air filter 25 to the ventilator 1. A delivery port 26b is provided on the side surface. The second introduction port 26a and the second delivery port 26b are each formed as a duct connection port for connecting a flexible duct having a circular cross section. The second introduction port 26a is connected to the ventilation port 9 for exhausting the room air RA by the exhaust air internal air introduction duct 36, and the second outlet 26b is connected to the ventilation device 1 by the above-described exhaust system inlet duct 33. Is connected to the third connection port 14b. The inside air introduction duct 36 is a flexible duct having a circular cross section.

  The outside air filter 23 and the inside air filter 25 are each made of a disposable bag-shaped filter medium made of synthetic fiber, filter paper, or the like. A substantially cylindrical first filter mounting portion 24c communicating with the first introduction port 24a is formed on the inner side of the upper surface of the first storage chamber 24 so as to protrude downward in the first storage chamber 24. An outside air filter 23 is attached to the first filter attachment portion 24c. A second filter mounting portion 26c communicating with the second introduction port 26a is formed on the inner surface of the second storage chamber 26 so as to protrude downward in the second storage chamber 26. An outside air filter 23 is attached to the portion 26c.

  Therefore, the outside air filter 23 and the inside air filter 25 are configured to suck air into the bag-shaped filter medium from above the bag-shaped filter medium and to let the air flow out to the outside of the bag-shaped filter medium through the filtration surface of the bag-shaped filter medium. For this reason, dust in the air is captured and accumulated inside the bag-shaped filter medium.

Next, the filter mounting structure will be described.
However, since the outside air filter mounting structure and the inside air filter mounting structure are the same, in FIG. 4, the reference numerals of the inside air filter parts are shown in parentheses except for common parts. Hereinafter, the mounting structure of the outside air filter 23 will be described. The explanation of the mounting structure of the inside air filter is replaced with the reference numerals of the inside air filter parts except for the common parts. Therefore, repeated description is omitted.

  As shown in FIG. 4, the first filter mounting portion 24 c is formed in a substantially cylindrical shape integrally with the first introduction port 24 a that connects the round duct, and the upper surface of the first storage chamber 24 is A mounting flange 24d is provided in the penetrating portion, and the mounting flange 24d is attached to the upper surface of the casing 21. A groove 24e having a substantially semicircular cross section is formed on the peripheral surface of the lower portion of the first filter mounting portion 24c. The groove 24e is used for elastically attaching the edge of the upper end opening of the outside air filter 23 made of a bag-like filter medium by a ring-shaped retaining ring 41 made of an elastic material, for example, synthetic rubber. It has a role of fixing the position of the wheel 41.

  Next, based on FIG.5 and FIG.6, the attachment method and removal method of the external air filter 23 with respect to the 1st filter attachment part 24c comprised in this way are demonstrated. Since the outside air filter mounting structure and the inside air filter mounting structure are the same as described above, in the following description, the mounting portion of the outside air filter 23 will be described as a representative example, and the description of the mounting structure of the inside air filter 25 will be omitted. To do.

  As shown in FIG. 5A, when attaching the outside air filter 23, the outside air filter 23 and a ring-shaped retaining ring 41 that fits at the upper end opening edge of the outside air filter 23 are prepared. next. As shown in FIG. 5B, the ring-shaped retaining ring 41 is fitted to the opening edge of the bag-shaped filter medium, and then the opening edge is wound around the ring-shaped retaining ring 41 as shown in FIG. And as shown in FIG.5 (c), hold | maintain the thing of the state which wound the opening edge part of the bag-shaped filter material around the ring-shaped retaining ring 41 from the downward toward the front-end | tip of the 1st filter attachment part 24c. The front end portion of the first filter mounting portion 24c is fitted into the opening portion at the front end of the bag-shaped filter medium so as to be pressed. As a result, the ring-shaped retaining ring 41 around which the opening edge of the bag-shaped filter medium is wound fits into the groove 24e, the bag-shaped filter medium is elastically gripped, and the outside air filter 23 is attached to the first filter mounting portion 24c. Installed in place.

  Next, when removing the outside air filter 23 attached in this way, as shown in FIG. 6, the bag-like filter medium may be held by hand and pulled downward. The outside air filter 23 is attached by a ring-shaped retaining ring 41 whose upper end opening edge is circular in cross section. Therefore, when pulled downward, the ring-shaped retaining ring 41 extends and is displaced downward from the groove 24e and removed. . Therefore, the removal of the outside air filter 23 is performed while maintaining the same vertical direction as when the outside air filter 23 is attached.

Next, a structure related to maintenance in the filter box 2 will be described.
As shown in FIG. 3, the filter box 2 has one surface perpendicular to the partition plate 22 in the box-shaped casing 21 as an inspection port for performing maintenance of the outside air filter 23 and the inside air filter 25. In other words. The first inspection port 51 of the first storage chamber 24 and the second inspection port 52 of the second storage chamber 26 are adjacent to each other with the partition plate 22 in between. And the service door 53 is attached to one side which these inspection ports adjoin so that these inspection ports may be opened and closed simultaneously. As shown in FIG. 3, the service door 53 is supported by a hinge at one end (the right end in this figure), and is configured to be able to open and close in a revolving door manner.

  The service door 53 includes a first viewing window 55 for allowing the outside air filter 23 to be observed from the outside, and a second viewing window for allowing the inside air filter 25 to be observed from the outside. 56 are formed by sheet metal working. Further, the first viewing window 55 and the second viewing window 56 are formed with horizontal bars integrally with the surrounding members.

  Furthermore, a scale 60 is provided at a position where the outside air filter 23 can be seen from the first looking window 55 when the outside air filter 23 is looked at. As shown in FIGS. 3 and 7, the scale 60 includes a height direction scale 61 for visually determining the dimension in the height direction, and a width direction scale for visually determining the bulging state of the bag-shaped filter medium. 62.

  The height direction scale 61 projects the horizontal plate portion 61a inward from the side surface of the first storage chamber 24 so as to indicate the height position of the bottom surface of the bag-like filter medium at an appropriate replacement time of the outside air filter 23. It has been made. Further, the width direction scale 62 includes a pair of vertical surface plate portions 62a with the plate surfaces in the vertical direction so as to indicate the left and right outer peripheral positions viewed from the service window of the bag-like filter medium at an appropriate replacement time of the outside air filter 23. The first storage chamber 24 protrudes forward from the back surface. And the dimension of a pair of vertical surface board part 62a is formed so that it may correspond with the substantially outer diameter of the external air filter 23 which came at the replacement time.

  Therefore, when dust such as insects and dust in the outside air accumulates in the outside air filter 23, it is possible to determine the degree of dust clogging in the outside air filter 23 by visually observing the swelling in the height direction and the width direction. .

Next, the operation of the ventilation system according to the present embodiment will be described.
The ventilation system is started by driving the air supply fan 15 and the exhaust fan 16 in the ventilation device 1.

As indicated by the solid line arrow in FIG. 1, when the operation is started, the outside air OA to be supplied into the room is sucked from the intake port 6 and the room air to be exhausted is sucked from the ventilation port 9.
The outside air OA sucked from the intake port 6 is introduced into the outside air filter 23 made of a bag-like filter medium of the filter box 2 via the outside air introduction duct 35 and the first introduction port 24a. Dust containing insects and dust contained in the outside air OA is filtered when the outside air OA flows from the inside of the bag-shaped filter medium to the outside. The filtered dust is captured and accumulated in the outside air filter 23 made of a bag-like filter medium.

  The outside air OA from which dust has been filtered by the outside air filter 23 passes through the first storage chamber 24, and is conveyed from the first outlet 24 b to the first connection port 13 b of the ventilation device 1 through the inlet duct 31 of the air supply system. . The outside air OA carried to the first connection port 13b undergoes total heat exchange with the indoor air RA exhausted in the total heat exchanger 12, and passes through the passage 13a, the second connection port 13c, and the outlet duct 32 of the air supply system. Then, the air is blown out from the air outlet 8 into the room 4 as the air supply SA.

  On the other hand, the room air RA sucked from the ventilation port 9 is introduced into the inside air filter 25 made of the bag-like filter medium of the filter box 2 via the inside air introduction duct 36 and the second introduction port 26a. Dust in the room air RA is filtered when the room air RA flows from the inside of the bag-shaped filter medium to the outside. The filtered dust is captured and accumulated in the inside air filter 25 made of a bag-like filter medium.

  The room air RA from which dust has been filtered by the room air filter 25 passes through the second storage chamber 26 and is conveyed from the second outlet 26b to the third connection port 14b of the ventilator 1 through the inlet duct 33 of the exhaust system. . The outside air OA carried to the third connection port 14b undergoes total heat exchange with the outside air OA supplied in the total heat exchanger 12, and passes through the passage 14a, the fourth connection port 14c, and the exhaust system outlet duct 34. From the discharge port 7, it is discharged to the outside as exhaust EA.

  Since the ventilation system is ventilated as described above, the outside air OA is supplied to the room 4 while recovering heat from the exhausted room air RA. Further, the dust in the outside air OA and the room air RA is captured inside the outside air filter 23 and the inside air filter 25 made of a bag-like filter medium before entering the total heat exchanger 12. Accordingly, only clean air for removing dust passes through the first storage chamber 24 and the second storage chamber 26 for storing the filter, so that dust is not attached to the wall surface and is kept clean. Further, since dust is removed from the outside air OA and the room air RA before entering the total heat exchanger, clogging of the total heat exchanger 12 is reduced.

  When the outside air filter 23 and the inside air filter 25 are clogged with dust, the air resistance increases and the ventilation capacity decreases, so it is necessary to replace them at appropriate intervals. A method of replacing the filter at regular intervals is also conceivable, but the replacement time cannot be determined uniformly depending on the installation location. Therefore, the method of replacing the filter at regular intervals cannot always select an appropriate time. Therefore, in the present ventilation system, in order to correct this, the dust accumulation state in the outside air filter 23 and the inside air filter 25 can be observed from the first viewing window 55 and the second viewing window 56. In addition, for the outside air filter 23 where maintenance frequency is particularly high, a scale 60 is provided so that it can be appropriately determined whether or not the replacement time has come from the first viewing window 55.

  Since the outside air filter 23 and the inside air filter 25 are formed of a bag-shaped filter medium that is long in the height direction, when dust accumulates in the bag-shaped filter medium, the length of the bag-shaped filter medium increases. The diameter will gradually increase. Whether or not the bag-shaped filter medium has reached a predetermined length can be determined by the bottom surface of the bag-shaped member contacting the horizontal plate portion 61 a of the height direction scale 61. Further, when the diameter of the bag-shaped filter medium is increased, the side surface of the bag-shaped member comes into contact with the vertical plate portion of the width direction scale 62.

Since the ventilation system according to the present embodiment is configured as described above, the following effects can be achieved.
(1) When the outside air OA conveyed to the ventilator 1 is introduced into the bag-like filter medium from the upper end opening in the outside air filter 23 made of the bag-like filter medium at the upper end opening, and flows from the inside to the outside of the bag-like filter medium Filtered. For this reason, dust such as insects and dust contained in the outside air OA is captured and accumulated in the bag. Therefore, insects and dust do not adhere to the wall surface in the first storage chamber 24 that stores the outside air filter 23, and the labor for cleaning the first storage chamber 24 can be saved.

  (2) The outside air filter 23 is elastically gripped and attached to the first filter attachment portion 24c, and when the bag-like filter medium is pulled downward from the first filter attachment portion 24c, the vertical direction during attachment is maintained. In this state, the first filter can be replaced. Therefore, there is no possibility that dust and insects captured by the filter are scattered when the filter is replaced. Conventionally, discrete dust has to be cleaned, but such ventilation is not necessary in the ventilation system. In addition, since the filter can be easily replaced, the maintenance is simplified.

  (3) Since the first inspection window 55 is formed in the service door 53 that opens and closes the first inspection port 51 of the first storage chamber 24, it is possible to easily observe the dust accumulation state in the outside air filter 23 from the outside. it can. This simplifies maintenance.

  (4) Since the scale 60 for determining the replacement time of the outside air filter 23 is attached to the first storage chamber 24 at a position where it can be seen from the first viewing window 55, the maintenance frequency is visually checked from the first viewing window 55. It is possible to accurately determine the replacement time of the high outside air filter 23. This simplifies maintenance.

  (5) Since the filter box 2 is configured to include the second storage chamber 26 for storing the indoor air filter 25 for removing dust in the room air RA, the number of boxes for storing both filters is one. Well, the cost is reduced.

  (6) The first inspection port 51 of the first storage chamber and the second inspection port 52 of the second storage chamber are formed so as to be adjacent to each other on one surface of the filter box 2, and are further opened and closed by a common service door 53. Thus, both filters can be maintained by opening and closing one service door. This simplifies maintenance.

  (7) Since the service door 53 includes the second viewing window through which the inside air filter 25 can be observed, the dust accumulation state of the inside air filter 25 can be easily observed from the outside. This simplifies maintenance.

  (8) Since the inside air filter 25 is also made of a bag-like filter medium similar to the outside air filter 23 and has the same mounting structure as the outside air filter 23, the replacement work can be easily performed. Moreover, the dust trapped by the inside air filter 25 during the replacement is not dispersed. Thus, the maintenance work of the inside air filter 25 is also simplified.

  (9) Since the outside air filter 23 and the inside air filter 25 have the same specifications and the same mounting structure, the parts can be shared, and the effect of cost reduction can be exhibited.

(Embodiment 2)
Next, a second embodiment will be described.
As shown in FIG. 8, in the second embodiment, the structure of the second storage chamber 26 is changed and the attachment position of the filter box is changed in the first embodiment. Hereinafter, the difference from the first embodiment will be mainly described. The same elements as those of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  The filter box 2 according to the second embodiment includes the first storage chamber 24 and the second storage chamber 26 as in the case of the first embodiment, but the configuration of the second storage chamber 26 is the embodiment. Different from 1.

  In the second storage chamber 26 in this embodiment, a second introduction port 71 for introducing the room air RA is formed on the side surface, and a second feed for sending the room air RA after being filtered by the filter to the ventilator 1. An outlet 72 is formed on the upper surface. Further, the second delivery port 72 is formed as a connection port of a round duct as in the case of the first embodiment, but the second introduction port 71 is not used as a duct connection port but directly passes ambient air. A suction grill is formed so as to suck into the second storage chamber 26.

  The room air filter 73 stored in the second storage chamber 26 is a flat plate that is attached so as to be inserted and removed in the horizontal direction in the same manner as the conventional one. The inside air filter 73 is configured to have a dust removing function and a deodorizing function.

  Unlike the case of Embodiment 1, the filter box 2 configured as described above is not installed in the machine room 5, but is installed in the room 4 which is a living space. Accordingly, the room air RA is directly sucked into the second introduction port 71. In addition, the 2nd delivery port 72 is connected to the 3rd connection port of the ventilation apparatus 1 by the inlet duct 33 of an exhaust system similarly to the case of Embodiment 1. FIG.

The ventilation system of the second embodiment configured as described above is different from the first embodiment in that it operates as follows.
The room air RA is introduced into the second storage chamber 26 from the second introduction port 71 formed on the side surface, and dust is filtered by the room air filter 73 and the odor of the room air RA is deodorized. Dust-filtered room air RA is conveyed to the third connection port 14b of the ventilation device 1 via the second outlet 72 and the inlet duct 33 of the exhaust system. The operation after the ventilation device 1 and the operation of the air supply system are the same as those in the first embodiment.

The ventilation system according to the second embodiment configured as described above has the effects (1) to (7) according to the first embodiment, and in addition, can provide the following effect (10).
(10) Since the inside air filter 73 has a dust removing function and a deodorizing function, it is possible to avoid the odor generated in the room 4 from being scattered in the vicinity. Therefore, it is optimal for uses such as restaurants and printing factories that generate odors.

(Modification)
The above-described embodiments can be modified as follows.
-In Embodiment 1, when the airtightness of the machine room 5 can be maintained, the inside air introduction duct 36 is omitted, and the room air RA passes through the ventilation port 9 and the machine room 5, and the room air is introduced from the second introduction port 26a. RA can be inhaled and exhausted. In this case, the ventilation port 9 only needs to have a function of guiding the room air RA to the machine room 5, so the duct connection port on the machine room 5 side of the ventilation port 9 may be eliminated.

  -In Embodiment 2, you may make it install the filter box 2 in a machine room. In this case, a ventilation port may be provided on the wall surface that separates the machine room from the residential room, and this ventilation port may be directly connected to the second introduction port 71 on the side surface of the second storage chamber 26. In this way, the indoor air RA can be reliably sucked from the second introduction port 71.

  -In Embodiment 1, you may change the inside air filter 25 to the filter of the structure inserted / removed to a horizontal direction similarly to Embodiment 2. FIG. The inside air filter 25 may be a filter having a deodorizing function.

  In Embodiment 1 and Embodiment 2, the opening edges of the bag-like filter media of the outside air filter 23 and the inside air filter 25 are elastically attached by the ring-shaped retaining ring 41 made of an elastic material such as synthetic rubber. As shown in FIG. 9, such attachment may be a structure in which a band member 42 made of a thin metal plate is fastened with a fastening tool 43 such as a screw. In this case, if the lower ends of the first filter mounting portion 24c and the second filter mounting portion 26c are expanded in diameter as shown in the drawing, the bag-shaped filter medium is firmly attached. When removing the bag-shaped filter medium, the bag-shaped filter medium can be easily pulled down by loosening the fastening tool and pulling the bag-shaped filter medium.

  In the first and second embodiments, instead of the ring-shaped retaining ring 41 formed separately, a ring-shaped elastic member is sewn on the opening edge of the bag-shaped filter medium, and the ring-shaped elastic member is stored. The opening edge portion of the bag-shaped filter medium itself may be made elastic by forming a portion and storing an annular elastic member in the portion.

-In Embodiment 1, although the 1st delivery port 24b and the 2nd delivery port 26b were provided in the side surface, these delivery ports can also be changed into appropriate positions, such as an upper surface, a lower surface, and a back surface.
-In Embodiment 2, the 1st delivery port 24b can also be changed into appropriate positions, such as an upper surface, a lower surface, and a back surface. In the second embodiment, the second delivery port 72 can be changed to an appropriate position such as a side surface or a back surface. In the second embodiment, the second introduction port 71 can be changed to an appropriate position such as the lower surface or the back surface.

  -In Embodiment 1 and 2, you may make it abbreviate | omit the 2nd observation window 56 for observing the inside air filters 25 and 73 with a low maintenance frequency. In this case, the dust trapping status of the inside air filters 25 and 73 may be confirmed when the service door 53 is opened to maintain the outside air filter 23.

  -In Embodiment 1 and Embodiment 2, the 1st observation window 55 and the 2nd observation window 56 are united, and the 1st storage chamber 24 and the 2nd storage chamber 26 which pinch | interpose the partition plate 22 can be observed simultaneously. You may be able to do it. In this way, the structure can be simplified and the cost can be reduced.

  In the first and second embodiments, the exhaust system inlet duct 31, the outlet duct 32, and the outside air introduction duct 35, and the air supply system inlet duct 33, the outlet duct 34, and the inside air introduction duct 36 are flexible in a circular cross section. Although they are ducts, these may be made of metal having a square cross section. In addition, what is necessary is just to make it match each duct connection port with the shape of a duct, when changing the shape of a duct in this way.

  EA ... exhaust, OA ... outside air, RA ... indoor air, SA ... air supply, 1 ... ventilator, 2 ... filter box, 3 ... ceiling, 4 ... indoor, 12 ... total heat exchanger, 23 ... outside air filter, 24 ... 1st storage chamber, 24a ... 1st introduction port, 24b ... 1st delivery port, 24c ... 1st filter attachment part, 25, 73 ... Inside air filter, 26 ... 2nd storage chamber, 26a, 71 ... 2nd introduction port , 26b, 72, second outlet, 26c, second filter mounting portion, 51, first inspection port, 52, second inspection port, 53, service door, 55, first viewing window, 56, second viewing window. 60 ... Scale.

Claims (7)

A ventilator (1) installed on the back of the ceiling (3), comprising a total heat exchanger (12) for total heat exchange between outside air (OA) to be supplied and indoor air (RA) to be exhausted;
A filter box (2) installed indoors, comprising a first storage chamber (24) for storing an outdoor air filter (23) for removing dust in the outside air (OA) conveyed to the ventilation device (1); A ventilation system having
The filter box (2) is connected to the ventilation device (1) by a duct,
The first storage chamber (24) has a first introduction port (24a) for introducing outside air (OA) on its upper surface, and a first filter mounting portion (24c) communicating with the first introduction port (24a). A first outlet (24b) for projecting inward from the upper surface, and for sending outside air after passing through the outside air filter (23) to the ventilator (1) on the side surface;
The outside air filter (23) has a bag-shaped filter medium having an upper end opening,
The attachment structure of the outside air filter is such that the upper end opening edge of the bag-like filter medium is the first filter attachment part (in the state where the first filter attachment part (24c) is inserted into the upper end opening of the bag-like filter medium). 24c) and by pulling the attached bag-shaped filter medium downward, the bag-shaped filter medium is configured to be removed from the first filter mounting portion (24c) while holding dust inside. The ventilation system. The ventilation system according to claim 1, wherein
The filter box (2) includes a first inspection port (51) for performing maintenance of the outside air filter (23) on one side surface of the first storage chamber (24), and the first inspection port (51 The service door (53) is opened and closed, and the service door (53) is provided with a first viewing window (55) through which the outside air filter (23) can be observed from the outside. The ventilation system according to claim 2,
The first storage chamber (24) is provided with a scale (60) for identifying the replacement time according to the swelling state of the outside air filter (23) at a position where it can be seen from the first viewing window (55). Ventilation system. The ventilation system according to claim 2 or 3,
The filter box (2) includes a second storage chamber (26) for storing an indoor air filter (25, 73) for removing dust in the room air (RA) conveyed to the ventilation device (1).
The second storage chamber (26) includes a second inspection port (52) on one side surface,
The first storage chamber (24) and the second storage chamber (26) are arranged in a horizontal direction so that the inspection ports of both chambers are adjacent to each other,
The service door (53) is configured to open and close the inspection ports of both rooms at the same time. The ventilation system according to claim 4,
The service door (53) has a second viewing window (56) through which the inside air filters (25, 73) can be observed from the outside. The ventilation system according to claim 5,
The second storage chamber (26) has a second introduction port (26a) for introducing room air (RA) on its upper surface, and a second filter mounting portion (26c) communicating with the second introduction port (26a). Is protruded inward from the upper surface, and further has a second outlet (26b) on the side surface for sending out room air (RA) after passing through the indoor air filter (25),
The inside air filter (25) is formed to have the same specifications as the outside air filter (25), and is configured to be detachable in the same manner as the outside air filter (25). The ventilation system according to claim 4 or 5,
The inside air filter (25, 73) has a dust filtering function and a deodorizing function.