JP2012052691A - Ventilator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ventilator which can reduce a burden necessary for the maintenance of a filter portion.SOLUTION: A bypass duct 38 is branched from an upstream side exhaust flow passage A and extends to a downstream side exhaust flow passage B while bypassing an heat exchange element 50a. A first filter 51 and a second filter 53 collect dust G contained in the air directed from the upstream side exhaust flow passage A toward the heat exchange element 50a and dust G contained in the air directed from an upstream side air-supply flow passage C toward the heat exchange element 50a. A first cleaning brush 65 and a second cleaning brush 66 separate the dust G collected with the first filter 51 and the second filter 53, allowing the dust to exist in the bypass duct 38. An exhaust fan 43 causes a bypass flow BA in the bypass duct 38 directed toward the downstream side exhaust flow passage B.

Description

  The present invention relates to a ventilation device.

  As a ventilator equipped with a total heat exchange element, for example, as described in Patent Document 1 (Japanese Patent Application Laid-Open No. 2007-285584), heat exchange is performed between indoor temperature-conditioned air and fresh air from the outside. Thus, a ventilator that improves the freshness of room air while suppressing an increase in indoor air conditioning load has been proposed.

  In a ventilator as described in the above-mentioned Patent Document 1 (Japanese Patent Laid-Open No. 2007-285584), in order to avoid that the effective heat exchange surface area of the total heat exchange element is covered with dust and becomes small, a filter is used. Is provided. Such a filter provided in the total heat exchange element prevents clogging by being periodically cleaned so that the ventilation resistance does not increase.

  However, since the filter provided for the total heat exchange element is disposed on the back of the ceiling or the like, the burden on cleaning tends to increase.

  The subject of this invention is providing the ventilation apparatus which can reduce the burden required for the maintenance of a filter part.

  A ventilator according to a first aspect is a ventilator for performing ventilation while exchanging heat between air in a target space and air in an external space outside the target space. An exhaust passage, a downstream exhaust passage, an upstream air supply passage, a downstream air supply passage, a detour passage, a filter unit, a separation mechanism, and a fan are provided. The total heat exchange unit exchanges heat between the air in the target space and the air in the external space. The upstream exhaust passage extends from the target space to the total heat exchange unit. The downstream exhaust passage extends from the total heat exchange part to the external space. The upstream air supply passage extends from the external space to the total heat exchange section. The downstream air supply passage extends from the total heat exchange unit to the target space. The bypass flow path branches from the upstream exhaust flow path and extends to the downstream exhaust flow path while bypassing the total heat exchange section. The filter unit captures dust collection in the air from the upstream exhaust passage toward the total heat exchange unit or from the upstream air supply channel toward the total heat exchange unit. The separation mechanism separates the dust collected by the filter unit from the filter unit, and causes the separated product to be present in the bypass channel. The fan generates an air flow toward the downstream exhaust flow path in the bypass flow path.

  In this ventilation device, the dust collection captured by the filter unit is separated from the filter unit by the separation mechanism. It is possible to avoid a state in which the heat exchange efficiency in the total heat exchange section is reduced due to clogging of the filter section or the like. The separated product separated from the filter unit is discharged using an air flow toward the downstream exhaust flow channel side in the bypass flow channel generated by the fan. Thereby, it becomes possible to reduce the burden required for the maintenance of the filter unit.

  It should be noted that the ventilation resistance when the ventilator flows into the bypass flow path from the upstream exhaust flow path is smaller than the ventilation resistance when it flows into the total heat exchange section from the upstream exhaust flow path. When constituted, discharge of a separated object can be promoted more. In this case, the air flow that flows through the bypass flow path can be made larger than the air flow that flows through the total heat exchange section, and the separated substance can be more easily discharged by the air flow of the bypass flow path. Can do.

  A ventilator according to a second aspect is the ventilator according to the first aspect, wherein the separation mechanism includes a scraping portion and a relative movement separation mechanism. The relative movement separation mechanism varies the position of the filter unit relative to the scraping unit.

  In this ventilator, since the scraping part and the filter part can be relatively moved by the relative movement separation structure, it is possible to easily separate the dust collected by the filter part.

  The ventilator which concerns on a 3rd viewpoint is a ventilator which concerns on a 2nd viewpoint, and a filter part is endless shape. The relative movement separation structure circulates the filter unit to separate at least a part of the dust collected by the filter unit from the filter unit.

  In this ventilation device, the entire filter unit can be cleaned only by circulating the filter unit. For this reason, it is not necessary to secure the space of the movement destination for cleaning the filter part.

  A ventilator according to a fourth aspect is the ventilator according to any of the second aspects, wherein the filter unit has one end and the other end. The relative movement separating structure moves at least a part of the dust collected by the filter unit from the filter unit by moving the filter unit.

  If the filter part is provided so as to go around the entire heat exchange part, the air flow passes through the filter part twice on the supply side and the exhaust side.

  On the other hand, in the ventilator in which the filter unit having one end and the other end is provided only on the air supply side of the total heat exchange unit, the number of times the air flow passes through the filter unit can be reduced to one time. It becomes possible to keep the resistance small. And even if it is a filter part of the structure which reduced the ventilation resistance in this way, it can make it easy to isolate | separate dust collection.

  A ventilator according to a fifth aspect is the ventilator according to any of the second to fourth aspects, wherein the scraping portion is disposed in the bypass flow path.

  In this ventilator, since the scraping part is arranged in the bypass flow path, it is possible to reduce the ventilation resistance to the air flow flowing toward the total heat exchange part in the upstream exhaust flow path or the upstream air supply flow path. become.

  A ventilator according to a sixth aspect is the ventilator according to the fifth aspect, wherein the scraping part has a brush that contacts the filter part in a state where the position relative to the filter part is relatively fluctuating. Yes.

  In this ventilator, since the filter unit moves relatively while being in contact with the scraping unit, it is possible to efficiently separate the dust collected by the filter unit.

  A ventilator according to a seventh aspect is the ventilator according to any of the second to sixth aspects, further comprising an automatic control unit. The automatic control unit automatically performs a relative change in the position of the scraping unit with respect to the filter unit when a signal related to a predetermined relative movement is received.

  In this ventilator, since the relative change of the position of the scraping part with respect to the filter part is automatically performed, it is possible to further reduce the work burden required for the maintenance of the filter part.

  A ventilator according to an eighth aspect is the ventilator according to any of the first to seventh aspects, further comprising a switching mechanism. The switching mechanism can switch between a detour state and a detour prohibition state. The detour-like body is in a state in which the air flow from the upstream side exhaust flow path to the detour flow path is allowed. The bypass prohibition state is a state in which an air flow from the upstream exhaust passage to the bypass passage is not permitted.

  In this ventilator, when the bypass flow path is not used, it is possible to suppress the air flow flowing through the upstream exhaust flow path from bypassing the total heat exchange unit.

  A ventilator according to a ninth aspect is the ventilator according to the eighth aspect, further comprising a fan control unit. The fan control unit controls the fan so that the air flow generated in the bypass flow path is larger in the bypass state than in the bypass prohibition state.

  This ventilator makes it easier to discharge separated matter than the air flow in the bypass-disabled state by controlling the air flow in the bypass-like body to be larger than the air flow in the bypass-disabled state. be able to.

  In the ventilation device according to the first aspect, it is possible to reduce the burden required for maintenance of the filter unit.

  In the ventilator according to the second aspect, the dust collected by the filter unit can be easily separated.

  In the ventilator according to the third aspect, it is not necessary to secure a space for a moving destination for cleaning the filter portion.

  In the ventilator according to the fourth aspect, dust collection can be easily separated even with a filter portion having a reduced ventilation resistance.

  In the ventilator according to the fifth aspect, it is possible to reduce the ventilation resistance to the air flow flowing toward the total heat exchange section in the upstream exhaust passage or the upstream air supply passage.

  In the ventilator according to the sixth aspect, it is possible to efficiently separate the dust collected by the filter unit.

  In the ventilator according to the seventh aspect, it is possible to further reduce the work load required for the maintenance of the filter unit.

  In the ventilator according to the eighth aspect, when the bypass flow path is not used, it is possible to prevent the air flow flowing through the upstream exhaust flow path from bypassing the total heat exchange section.

  In the ventilator according to the ninth aspect, the separated matter can be easily discharged.

It is a schematic block diagram which shows the example which the ventilation apparatus concerning one Embodiment of this invention employ | adopted. It is a block block diagram of a ventilation apparatus. It is the schematic which shows the total heat exchange ventilation state in the top view of a ventilation apparatus. It is the schematic which shows the discharge | emission state in the top view of a ventilation apparatus. It is a schematic sectional drawing in the XX plane of FIG. It is a schematic sectional drawing in the YY plane of FIG. It is a schematic sectional drawing in the ZZ plane of FIG. It is a schematic side view which shows the arrangement | positioning relationship between a filter and a cleaning mechanism. It is the schematic of the moving mechanism seen from the normal line direction of the surface of a filter. It is the schematic of the moving mechanism seen from the direction parallel to the surface of a filter. It is the schematic of the moving mechanism seen from the normal line direction of the surface of the filter concerning other embodiments (A). It is the schematic of the moving mechanism seen from the direction parallel to the surface of the filter which concerns on other embodiment (A). It is the schematic which shows the total heat exchange ventilation state in the side view of the ventilation apparatus which concerns on other embodiment (B). It is the schematic which shows the discharge | emission state in the side view of the ventilation apparatus which concerns on other embodiment (B). It is a schematic side view which shows the arrangement | positioning relationship between the filter which concerns on other embodiment (B), and the cleaning mechanism. It is a schematic side view which shows the arrangement | positioning relationship between the filter and cleaning mechanism which concern on the modification of other embodiment (B). It is a schematic side view which shows the arrangement | positioning relationship between the filter which concerns on other embodiment (C), and the cleaning mechanism. It is the schematic which shows the discharge | emission state in the side view of the ventilation apparatus which concerns on other embodiment (D). It is a schematic side view which shows the arrangement | positioning relationship between the filter which concerns on other embodiment (D), and a cleaning mechanism. It is a schematic block diagram which shows the example which employ | adopted the ventilator which concerns on other embodiment (I).

Hereinafter, an embodiment of a ventilator 1 of the present invention will be described based on the drawings.
(1) Configuration of Ventilation Device FIG. 1 is a schematic view of a target property to which a ventilation device 1 according to an embodiment of the present invention is adopted.

  FIG. 2 is a block configuration diagram of the ventilation device 1.

  The ventilation device 1 is arranged in a space behind the ceiling of the room in the building H, and is a device that performs heat exchange between supply and exhaust while ventilating the room SI.

  The ventilation device 1 includes a ventilation unit 5, an upstream exhaust duct 21, a downstream exhaust duct 22, an upstream air supply duct 23, a downstream air supply duct 24, an indoor temperature sensor TH1, an outdoor temperature sensor TH2, a control unit 70, and A remote control 97 and the like.

  The ventilation unit 5 includes a casing 50, a bypass duct 38, a bypass damper 39, an air supply fan 42, an exhaust fan 43, a heat exchange element 50a, a first filter 51, a second filter 53, a filter moving mechanism 60, and a first cleaning brush. 65, and a second cleaning brush 66.

  The casing 50 accommodates therein a substantially square columnar heat exchange element 50a, an air supply fan 42, an exhaust fan 43, and the like, and includes an upstream exhaust duct 21, a downstream exhaust duct 22, and an upstream air supply duct 23. And the opening for connecting with each of the downstream air supply ducts 24 is provided. In the casing 50, an upstream exhaust space 21a is provided on the upstream exhaust duct 21 side with respect to the heat exchange element 50a, and a downstream exhaust space 22a is provided on the downstream exhaust duct 22 side with respect to the heat exchange element 50a. However, the upstream air supply space 23a is on the upstream air supply duct 23 side with respect to the heat exchange element 50a, and the downstream air supply space 24a is on the downstream air supply duct 24 side with respect to the heat exchange element 50a. Are provided respectively.

  The air supply fan 42 is disposed in the downstream air supply space 24a and includes an air supply fan motor 42m. The exhaust fan 43 is disposed in the downstream exhaust space 22a and includes an exhaust fan motor 43m.

  The upstream exhaust duct 21 extends to the upstream exhaust space 21 a of the casing 50 through the opening 13 provided in the ceiling of the room SI. The downstream exhaust duct 22 extends from the downstream exhaust space 22a of the casing 50 to the opening 15 that opens toward the outdoor SO. The upstream air supply duct 23 extends from the opening 14 that opens toward the outdoor SO separately from the opening 15 to the upstream air supply space 23 a of the casing 50. The downstream air supply duct 24 extends from the downstream air supply space 24 a of the casing 50 to an opening 12 different from the opening 13 provided in the ceiling of the room SI.

  The upstream exhaust duct 21 and the upstream exhaust space 21a constitute an upstream exhaust passage A for the heat exchange element 50a. The downstream exhaust duct 22 and the downstream exhaust space 22a constitute a downstream exhaust passage B for the heat exchange element 50a. The upstream air supply duct 23 and the upstream air supply space 23a constitute an upstream air supply passage C for the heat exchange element 50a. The downstream air supply duct 24 and the downstream air supply space 24a constitute a downstream air supply passage D for the heat exchange element 50a.

  As shown in the side sectional view of FIG. 5 and FIG. 1, the outdoor air OA of the outdoor SO reaches the heat exchange element 50a via the upstream air supply passage C when the air supply fan 42 is driven, The air that has passed through the replacement element 50a is supplied to the room SI as fresh air supply SA. As shown in the side sectional view of FIG. 6 and FIG. 1, the indoor air RA in the room SI is driven by the exhaust fan 43 to reach the heat exchange element 50a via the upstream exhaust passage A, The air that has passed through the replacement element 50a becomes exhaust EA and is discharged to the outdoor SO. Here, in the heat exchange element 50a, heat exchange is performed between the room air RA and the outside air OA while preventing them from mixing with each other, so that the temperature of the outdoor OA approaches the temperature of the room air RA in the room SI. Therefore, the air conditioning load accompanying ventilation is reduced.

  The bypass duct 38 connects the upstream exhaust space 21a and the downstream exhaust space 22a while bypassing the heat exchange element 50a. A bypass opening 38 a is provided at a connection portion between the bypass duct 38 and the upstream exhaust space 21 a in the casing 50. The bypass damper 39 is provided so as to be able to switch between a state where the bypass opening 38a is closed as shown in FIG. 3 and a state where the bypass opening 38a is opened as shown in FIG. The lower surface of the bypass duct 38 is vertically below a pressure contact portion between a first filter 51 and a first cleaning brush 65, which will be described later, and a pressure contact portion between the second filter 53 and the second cleaning brush 66. Is provided.

  When the switching state of the bypass damper 39 is operated and the exhaust fan 43 is driven in a state where the bypass opening 38a is opened, the indoor air RA in the room SI is as shown in the side view sectional view of FIG. 7 and FIG. It bypasses without passing through the heat exchanging element 50a through the upstream exhaust passage A, passes through the bypass duct 38 as a bypass flow BA, and becomes exhaust EA through the downstream exhaust passage B. Discharged to SO.

  The first filter 51 is disposed so as to cover a portion of the heat exchange element 50a exposed to the upstream exhaust space 21a. The 2nd filter 53 is arrange | positioned so that the part exposed to the space 23a for upstream air supply among the heat exchange elements 50a may be covered. Thus, dust can be removed from both the outside air OA and the indoor air RA before being supplied to the heat exchange element 50a, and dust collection G can be prevented from flowing into the heat exchange element 50a. is made of. A part of each of the first filter 51 and the second filter 53 is arranged so as to be located in the bypass duct 38 through an opening provided through the bypass duct 38. The first filter 51 and the second filter 53 have an endless shape in the circulation direction, and are provided so as to form a ring when the filter moving mechanism 60 is viewed in the rotation axis direction.

  The filter moving mechanism 60 is disposed in the bypass duct 38 and holds part of the first filter 51 and the second filter 53 located in the bypass duct 38. The filter moving mechanism 60 circulates and moves the first filter 51 and the second filter 53 via the holding portions of the first filter 51 and the second filter 53. Specifically, as shown in FIG. 8 which is a schematic arrangement diagram in a side view, FIG. 9 which is a schematic configuration diagram in a plan view, and FIG. 10 which is a schematic configuration diagram in a rotation axis direction, It has a first filter holding shaft 61a and a first filter motor 61m that hold the first filter 51, and a second filter holding shaft 63a and a second filter motor 63m that hold the second filter 53. When the first filter motor 61m is driven to rotate, the first filter holding shaft 61a rotates, and the first filter 51 slides in a direction orthogonal to the air flow direction passing through the heat exchange element 50a. Circulate, move. The same applies to the second filter 53.

  As shown in FIGS. 8, 9, and 10, the first cleaning brush 65 is seen in a side view so as to be pressed against a part of the first filter 51 located in the bypass duct 38 in the horizontal direction. Dust collection that has been captured by the first filter 51 by driving the first brush motor 65m in a state where the first filter 51 is circulated and moved by the filter moving mechanism 60. G is scraped off. Here, in the portion where the first filter 51 and the first cleaning brush 65 are in pressure contact, the traveling direction of the first filter 51 and the rotational traveling direction of the first cleaning brush 65 are driven to face each other. Is done. Similar to the first cleaning brush 65, the second cleaning brush 66 is arranged side by side in the side view direction so as to be in pressure contact with a part of the second filter 53 located in the bypass duct 38 in the horizontal direction. In the state where the second filter 53 is circulated and moved by the filter moving mechanism 60, the second brush motor 66m is driven to scrape off the dust collection G captured by the second filter 53. Here, the first cleaning brush 65 and the second cleaning brush 66 are disposed in the bypass duct 38, and the first filter 51 and the second filter 53, the first cleaning brush 65 and the second cleaning brush are arranged. Since the lower surface of the bypass duct 38 is located vertically below the pressure-contact portion with 66, the dust collection G scraped off from the first filter 51 and the second filter 53 falls in the bypass duct 38 after falling by its own weight. To come to exist.

  The room temperature sensor TH1 detects the temperature of the room SI. The outdoor temperature sensor TH2 detects the temperature of the outdoor SO.

  The remote controller 97 is for a user existing in the room SI to perform various setting operations on the ventilation device 1.

As shown in FIG. 2, the control unit 70 includes an air supply fan motor 42m, an exhaust fan motor 43m, a remote controller 97, an indoor temperature sensor TH1, an outdoor temperature sensor TH2, a bypass damper 39, a first filter motor 61m, and a second filter. The motor 63m, the first brush motor 65m, and the second brush motor 66m are connected to obtain various temperature information and control the driving state of these devices.
(2) Ventilation operation When the detected temperature of the indoor temperature sensor TH1 and the detected temperature of the outdoor temperature sensor TH2 satisfy a predetermined relationship condition for starting the ventilation operation, the control unit 70 is shown in FIG. As described above, the ventilation fan 38 and the exhaust fan 43 are driven so that the bypass opening 38a is closed by the bypass damper 39, thereby performing the ventilation operation. At this time, no air flow is generated in the bypass duct 38.

Thus, fresh air can be supplied with respect to indoor SI by performing ventilation operation | movement. Furthermore, the supply air SA supplied to the room SI can be brought close to the room temperature by exchanging heat with the room air RA in the heat exchange element 50a, and the air conditioning load of the room SI can be reduced.
(3) Filter cleaning operation The controller 70 cleans the first filter 51 and the second filter 53 at predetermined time intervals such as once a month or once a year. I do. The predetermined time interval here can be set in advance by the user using the remote control 97 or the like.

  As shown in FIG. 4, the control unit 70 automatically operates the bypass damper 39 to open the bypass opening 38a and drives only the exhaust fan 43 while the supply fan 42 is stopped. Filter cleaning operation. Here, the control unit 70 adjusts the air volume of the exhaust fan 43 when performing the filter cleaning operation to be larger than the air volume when performing the ventilation operation. Further, as shown in FIG. 8, FIG. 9, and FIG. 10, the control unit 70 includes a first filter motor 61m, a second filter motor 63m, a first brush motor 65m, and a second brush motor 66m. By driving, the dust collection G captured by the first filter 51 and the dust collection G captured by the second filter 53 are scraped off, respectively.

  At this time, since the exhaust fan 43 is driven, an air flow (bypass flow BA) is generated in the bypass duct 38 and is adjusted to be larger than the air volume during the ventilation operation. The dust flow G scraped into the duct 38 and the dust collection G adhering to the first cleaning brush 65 and the second cleaning brush 66 are also generated in the bypass duct 38 (bypass flow BA). ) Can be efficiently discharged.

  Since the air supply fan 42 is stopped during the filter cleaning operation, the upstream air supply channel C, the downstream air supply channel D, and the portion of the heat exchange element 50a that connects these channels are not provided. There is no air flow. For this reason, even if the dust collection G captured by the filter 51 may reach the downstream air supply passage D, it can be prevented from being sent to the room SI.

(4) Features of ventilator 1 (4-1)
In the ventilator 1 of the above embodiment, the first filter 51 and the second filter 53 can prevent the dust collection G from entering the heat exchange element 50a. Then, the first filter 51 and the second filter 53 are cleaned at a predetermined time interval, so that the first filter 51 and the second filter 53 are hardly clogged. As a result, the power consumption of the exhaust fan 43 and the air supply fan 42 can be reduced. In addition, by performing the filter cleaning operation at predetermined time intervals in this manner, the amount of dust collection G discharged to the outdoor SO by one cleaning can be reduced.

  The dust collection G scraped off from the first filter 51 and the second filter 53 by the filter cleaning operation can be discharged to the outdoor SO by the air flow flowing in the bypass duct 38. For this reason, in order to clean the 1st filter 51 and the 2nd filter 53, a user and a service engineer do not need to perform complicated operation | movement, such as entering the space behind the ceiling of indoor SI. Further, since the dust collection G can be discharged by using the exhaust fan 43 provided in advance in the ventilation unit 5 in order to perform total heat exchange ventilation, a new configuration such as a bypass duct 38 is provided. With a simple configuration, the filter cleaning operation can be automatically performed.

  A first cleaning brush 65 for scraping dust collection G from the first filter 51 and a second cleaning brush 66 for scraping dust collection G from the second filter 53 are disposed in the bypass duct 38. Has been. A part of the first filter 51 and the second filter 53 is also located in the bypass duct 38, and the whole can be moved into the bypass duct 38 by circulation. For this reason, the dust collection G scraped off by the first cleaning brush 65 and the second cleaning brush 66 can be allowed to exist in the bypass duct 38 as it is without using a means for moving it into the bypass duct 38. Can be easily discharged to the outdoor SO.

  Furthermore, since the first filter 51 and the second filter 53 have an endless shape, they can be circulated and moved. The first filter 51 and the second filter 53 can be cleaned as a whole by such a configuration capable of circulating movement. As described above, the first filter 51 and the second filter 53 are circulated and moved so that the positions of the first cleaning brush 65 and the second cleaning brush 66 are fixed. 65 and the second cleaning brush 66 can be easily collected. Further, even when the part of the first filter 51 or the second filter 53 that captures the dust collection G is moved to the position of the first cleaning brush 65 or the second cleaning brush 66, Since the overall positions of the filter 51 and the second filter 53 do not change, it is not necessary to provide a new space for cleaning.

(4-2)
In the ventilation device 1 of the above embodiment, control is performed so that the air volume of the exhaust fan 43 in the filter cleaning operation is larger than the air volume of the exhaust fan 43 when performing the ventilation operation. For this reason, the dust collection G can be discharged more effectively.

Further, since the heat exchange element 50a is configured to ensure as much surface area as possible to contact the air passing therethrough, it tends to be a ventilation resistance against the passing air. There is no element to be a resistance. For this reason, even when the exhaust fan 43 is operated with the same output, compared with a case where air is passed through the heat exchange element 50a from the upstream exhaust passage A toward the downstream exhaust passage B in the ventilation operation. In the case where air is passed through the bypass duct 38 by bypassing the heat exchange element 50a, the wind speed can be improved. Thereby, the dust collection G in the bypass duct 38 can be more easily discharged.
<Other embodiments>
As mentioned above, although one Embodiment of this invention was described based on drawing, a specific structure is not restricted to this Embodiment, It can change in the range which does not deviate from the summary of invention as follows. .

(A)
In the ventilator 1 of the above-described embodiment, the endless first filter 51 and the second filter 53 that form a ring when viewed in the rotation axis direction of the filter moving mechanism 60 have been described as examples.

  However, the present invention is not limited to this. For example, as shown in FIGS. 11 and 12, a first filter 251 configured to have an end instead of a ring shape and a filter moving mechanism 260 are employed. You may make it do.

  The filter moving mechanism 260 includes a second support shaft 261b and a first support shaft 261a that can wind up the first filter 251. The second support shaft 261b has a spring mechanism (not shown), and applies tension to the first filter 251 so as to wind the first filter 251 into itself. The first support shaft 261a drives the first support shaft-side motor 261m, and winds the first filter 251 toward itself against the force pulled by the second support shaft 261b, whereby the first filter 251 is wound. Of these, the portion where the second support shaft 261b is entrained and the portion where the dust collection G has not yet been captured can be exposed to the outside of the second support shaft 261b. And the part which was arrange | positioned in the air flow with respect to the heat exchange element 50a among the 1st filters 251 and was collecting the dust collection G is for 1st cleaning, before it is wound up by the 1st support shaft 261a. It is scraped off by the brush 65. And the said part of the 1st filter 251 cleaned by the 1st cleaning brush 65 will be in a beautiful state, and will be wound up by the 1st support shaft 261a.

  Then, the dust collection G contained in the air which goes to the heat exchange element 50a is captured using the part newly exposed from the 2nd support shaft 261b.

  As described above, after the first filter 251 is fed by a predetermined length from the second support shaft 261b toward the first support shaft 261a, the pulling force on the first support shaft 261a side is released, and the first filter 251 is cleaned after cleaning. The first filter 251 is again wound around the second support shaft 261b. In this way, the first filter 251 may be used repeatedly.

  In the other embodiment (A), the first filter 251 has been mainly described. However, the same configuration as the first filter 251 and the filter moving mechanism 260 is also applied to the portion corresponding to the second filter 53 in the above embodiment. May be adopted.

(B)
The ventilation device 1 of the above embodiment includes the first filter 51 and the second filter 53 that circulate and move in a direction perpendicular to the air passing direction of the heat exchange element 50a, and the bypass duct 38 is arranged side by side in the horizontal direction. The above ventilator 1 has been described as an example.

  However, the present invention is not limited to this. For example, as shown in FIGS. 13, 14, and 15, the bypass duct 338 is a ventilation unit 305 disposed below the heat exchange element 50a in the vertical direction. May be.

  The casing 350 of the ventilation unit 305 has an opening 338a opened in the vertical direction below the surface of the heat exchange element 50a on the upstream exhaust space 21a side in the vertical direction. The downstream exhaust space 22a also has an opening 338b that opens in the vertical direction. The bypass damper 339a is provided so that the opening 338a can be opened and closed. The bypass damper 339b is provided so that the opening 338b can be opened and closed. FIG. 13 shows a state where the bypass damper 339a closes the opening 338a and the bypass damper 339b closes the opening 338b, and performs a ventilation operation in the same manner as in the above embodiment. FIG. 14 shows a state where the bypass damper 339a has an opening 338a and the bypass damper 339b has an opening 338b to perform a filter cleaning operation.

  The filter 351 of the ventilation unit 305 is different from the first filter 51 and the second filter 53 of the above embodiment in that the surface on the upstream exhaust flow path A side and the surface on the upstream air supply flow path C side of the heat exchange element 50a. It is configured integrally so as to cover both.

  The filter moving mechanism 360 includes two support shafts 361a and 361b arranged vertically along the lower end portion of the heat exchange element 50a, and a support arranged along one end portion of the heat exchange element 50a in the air flow direction. It has a shaft 361c and a support shaft 361d disposed along the other end portion of the heat exchange element 50a in the air flow direction.

  The filter 351 has an endless shape provided so as to form a ring when viewed in the axial direction of the support shafts 361a, 361b, 361c, 361d. The filter 351 is arranged so that the support shafts 361a, 361c, and 361d are positioned inside the ring and the support shaft 361b is positioned outside the ring.

  The cleaning brush 365 is provided below the support shaft 361a provided so as to extend along the lower end portion of the heat exchange element 50a so as to share the axial direction with the support shaft 361a. Note that, in the pressure contact portion between the filter 351 and the cleaning brush 365, the moving direction of the filter 351 due to the rotation of the filter moving mechanism 360 and the moving direction of the brush due to the rotation of the cleaning brush 365 are configured to face each other. Has been.

  Since the filter 351 has an endless shape as described above, the part where the dust collection G is captured can be moved to the position of the cleaning brush 365 by moving the filter 351 by the filter moving mechanism 360. For this reason, the entire filter 351 can be cleaned. Since the dust collection G scraped off from the filter 351 falls into the bypass duct 338 arranged vertically downward, a simple configuration without providing a configuration for carrying the dust collection G into the bypass duct 38 is provided. Thus, the air flow in the bypass duct 38 can be easily discharged.

  In the example of the other embodiment (B), the case where the position of the cleaning brush 365 is fixed has been described. However, for example, as shown in FIG. It is good also as a structure which provided the filter moving mechanism 360a which has the brush 365a for cleaning. If the movable cleaning brush 365a is employed here, the cleaning brush 356a is moved to a position where the dust collection G scraped off from the filter 351 is efficiently collected in the bypass duct 38, It is desirable to scrape off the dust collection G of the filter 351.

  Moreover, when it is set as the structure which can be moved like the cleaning brush 365a, the structure fixed to the heat exchange element 50a may be sufficient as the filter 351.

(C)
In the ventilator 1 of the above embodiment, as an example, the filter is provided only on the surface on the upstream exhaust flow path A side and the surface on the upstream air supply flow path C side with respect to the heat exchange element 50a. I gave it as an explanation.

  However, the present invention is not limited to this. For example, as shown in FIG. 17, the upstream-side exhaust passage A side surface, the downstream-side exhaust passage B-side surface, and the upstream side of the heat exchange element 50a A filter 451 that is arranged so as to cover all four surfaces of the surface on the side air supply channel C side and the surface on the downstream air supply channel D side, and these are integrated, a filter moving mechanism 460, You may comprise so that it may have.

  The filter moving mechanism 460 includes support shafts 461a, 461b, 461c, and 461d provided along the lower end portion, the upper end portion, and both end portions in the air flow direction of the heat exchange element 50a, respectively.

  The cleaning brush 465 may be configured to be movable or may be fixed in position.

  In this configuration, when the filter 451 is moved, dust collection G such as a portion located on the upstream exhaust flow path A side or a portion located on the upstream air supply flow path C side is moved before moving. It is desirable to perform movement control by the filter moving mechanism 460 so that the portion that has been captured is not positioned on the downstream air supply flow path D side before being cleaned by the cleaning brush 465. If the uncleaned part that captures the dust collection G is positioned on the downstream air supply flow path D side, the dust collection G is sent to the indoor SI side when the air supply fan 42 is driven. This is because it is desirable to avoid this.

  Therefore, for example, by first rotating the filter 451 counterclockwise in the side view of FIG. 17, the portion of the filter 451 existing on the upstream exhaust flow path A side during the ventilation operation is moved to the position of the cleaning brush 465. After cleaning while moving (in this state, the portion existing on the upstream air supply channel C side will be present on the downstream exhaust channel B side), and without further counterclockwise rotation, By rotating the filter 451 clockwise in the side view of FIG. 17, the portion of the filter 451 that is present on the upstream air supply channel C side during the ventilation operation is cleaned while being moved to the position of the cleaning brush 465. At this time, a part of the filter 451 that is present on the upstream exhaust flow path A side during the ventilation operation and has captured the dust collection G is positioned on the downstream air supply flow path D side. Since the dust collection G is scraped off, it can be suppressed that the dust collection G exists in the downstream side air supply passage D.

(D)
In the ventilator 1 of the above-described embodiment, a case where the first cleaning brush 65 and the second cleaning brush 66 are used to scrape the dust collection G from the first filter 51 and the second filter 53 will be described as an example. did.

  However, the present invention is not limited to this. For example, as shown in FIGS. 18 and 19, as a part of the casing 550, for example, a scraping portion that is a part of a wall surface 555 for forming the bypass duct 538. A ventilation unit 505 that scrapes off the dust collection G by pressing the portion of the filter 551 that has captured the dust collection G while sliding it may be employed.

  The casing 550 of the ventilation unit 505 has an opening 538a that opens in the vertical direction below the surface of the heat exchange element 50a on the upstream exhaust space 21a side in the vertical direction. The downstream exhaust space 22a also has an opening 538b that opens in the vertical direction. The bypass damper 539a is provided so that the opening 538a can be opened and closed. The bypass damper 539b is provided so that the opening 538b can be opened and closed. FIG. 18 shows a state where the bypass damper 539a has an opening 538a and the bypass damper 539b has an opening 538b to perform a filter cleaning operation.

  As shown in FIG. 19, the filter 551 of the ventilation unit 505 is the same as that of the other embodiment (B), and the surface on the upstream exhaust flow path A side and the upstream air supply flow path C of the heat exchange element 50a. It is configured integrally so as to cover both the side surface.

  The filter moving mechanism 560 is also the same as that in the other embodiment (B), and two support shafts 561a and 561b arranged vertically along the lower end portion of the heat exchange element 50a, and the heat exchange element 50a. Support shafts 561d and 561d are disposed along both ends in the air flow direction.

  The filter 551 has an endless shape provided so as to form a ring when viewed in the axial direction of the support shafts 561a, 561b, 561c, and 561d. The filter 551 is disposed such that the support shafts 561a, 561c, and 561d are positioned inside the filter 551 and the support shaft 561b is positioned outside the filter 551.

  The filter 551 configured as described above is slid while being pressed against a scraping portion 565 provided at the tip portion of the wall surface 555 for constituting the bypass duct 538 when being circulated and moved by the filter moving mechanism 560. As a result, the collected dust G is scraped off.

  The scraping portion 565 preferably has a shape with a protruding tip.

  Further, in order to increase the efficiency with which the dust collection G is scraped off from the filter 551, the shape of the filter 551 can be curved to be convex outward at the portion where the scraping portion 565 contacts the filter 551. Preferably there is. In another example of the embodiment (D), the filter 551 is convexly curved in the vicinity of the support shaft 561a, and the curved portion is configured to contact the scraping portion 565. The dust G can be scraped off efficiently.

(E)
In the said embodiment, the ventilation apparatus 1 which supplies the air which carried out the heat exchange ventilation in the heat exchange element 50a as it is to indoor SI as an example was demonstrated.

  However, the present invention is not limited to this, for example, after fresh air that has passed through the heat exchange element 50a is further passed through a heat exchanger of an indoor unit of an air conditioner that is provided separately, You may make it supply to SI.

(F)
In the ventilation device 1 of the above embodiment, the case where the dust collection G scraped off from the first filter 51 and the second filter 53 is discharged to the outdoor SO has been described as an example.

  However, the present invention is not limited to this, for example, a position before reaching the outdoor SO in the middle of the downstream side exhaust flow path B and provided at a position where access from the indoor SI side is easy. A space such as a dust collecting reservoir may be provided. As described above, even when the dust collection G is collected at a position that is easily accessible from the indoor SI side, and the dust collection G collected by the user is processed periodically. There is no need to perform complicated operations such as disassembling the ventilation unit 5 and cleaning the filter.

(G)
In the ventilation apparatus 1 of the said embodiment, the case where filter cleaning operation | movement was performed by the time interval predetermined by the user was mentioned as an example, and was demonstrated.

  However, the present invention is not limited to this. For example, the control unit 70 may start the filter cleaning operation according to the total length of time during which the ventilation operation is performed, the predetermined date and time, or the time. .

  In addition, a filter cleaning operation is started according to the detection result of the sensor using a sensor for detecting the degree of contamination of the first filter 51 and the second filter 53, a sensor for detecting the degree of contamination of the passing air, and the like. May be.

(H)
In 1 of the said embodiment, when performing filter cleaning operation, the case where the air supply fan 42 was stopped was mentioned as an example, and was demonstrated.

  However, the present invention is not limited to this. For example, when a structure that suppresses the dust collection G from reaching the downstream air supply passage D is employed, even during the filter cleaning operation, You may make it drive the supply fan 42 similarly to the time of ventilation operation | movement.

  In addition, the air supply fan 42 may not be completely stopped during the filter cleaning operation, but may be driven with a lower air volume than in the ventilation operation.

(I)
In the ventilator 1 of the above embodiment, an example in which the exhaust fan 43 is disposed in the downstream exhaust space 22a of the casing 50 and the air supply fan 42 is disposed in the downstream air supply space 24a of the casing 50 is an example. And explained.

  However, the present invention is not limited to this. For example, as shown in FIG. 20, the exhaust fan 643 and the exhaust fan motor 643m are arranged in the upstream exhaust space 21a of the casing 50, and the supply fan 642 and It is good also as the ventilator 601 which has the ventilation unit 605 which has arrange | positioned the air supply fan motor 642m in the upstream air supply space 23a of the casing 50. FIG.

  Further, regarding the arrangement of the air supply fan and the exhaust fan, the arrangement of the above embodiment and the arrangement of the other embodiment may be appropriately combined.

  When the exhaust fan 643 is disposed in the upstream exhaust space 21a, the dust collection G scraped off from the first filter 51 and the second filter 53 by the filter cleaning operation is discharged to the outdoor SO. Since the exhaust fan 43 does not exist until this time, it is possible to suppress problems due to the exhaust fan 643 taking in the dust collection G.

(J)
In the first embodiment, the case where the filter cleaning operation is performed by scraping off the dust collection G captured by the first filter 51 and the second filter 53 has been described as an example.

  However, the present invention is not limited to this, and for example, other dust attached to the first filter 51 and the second filter 53 together with the dust collection G may be scraped off together. .

(K)
The above embodiment and each of the above embodiments (A) to (J) are not intended to limit the invention, and the contents of the above embodiment and (A) to (J) should be understood by a method obvious to those skilled in the art. Can be carried out in various combinations, and the combined contents are also included in the present invention.

  The ventilator of the present invention is particularly useful in a ventilator having a filter because it can reduce the load required for maintenance of the filter unit.

1 Ventilator 38 Bypass duct (bypass)
39 Bypass damper (switching mechanism)
43 Exhaust fan (fan)
50a Heat exchange element (total heat exchange part)
51 Filter (Filter part)
65, 66 Cleaning brush (brush, separation mechanism, scraping part, relative movement separation structure)
70 Control part (automatic control part, fan control part)
565 scraping part (separation mechanism, scraping part)
A Upstream exhaust passage B Downstream exhaust passage C Upstream supply passage D Downstream supply passage SI Indoor (target space)
SO Outdoor (external space)

JP 2007-285584 A

Claims (9)

A ventilation device (1, 601) for performing ventilation while exchanging heat between air in a target space (SI) and air in an external space (SO) that is outside the target space,
A total heat exchanger (50a) for exchanging heat between the air in the target space and the air in the external space;
An upstream exhaust passage (A) extending from the target space to the total heat exchange section;
A downstream exhaust passage (B) extending from the total heat exchange section to the external space;
An upstream air supply passage (C) extending from the external space to the total heat exchange section;
A downstream air supply passage (D) extending from the total heat exchange section to the target space;
A bypass channel (38, 338) branched from the upstream exhaust channel and extending to the downstream exhaust channel while bypassing the total heat exchange section;
Filter units (51, 53, 251, 351, 451, 551) for capturing dust collection in the air from the upstream exhaust flow path to the total heat exchange section or from the upstream air supply flow path to the total heat exchange section When,
Separation mechanism (60, 65, 66, 260, 360, 360a, 460) that separates the dust collected by the filter unit from the filter unit and causes the separated separated matter to exist in the bypass channel. 565),
Fans (43, 643) for generating an air flow toward the downstream exhaust flow path in the bypass flow path;
Ventilator (1, 601) with The separation mechanism includes a scraping portion (65, 66, 365, 365a, 465, 565) and a relative movement separation structure (60, 260, 360, 360) that relatively varies the position of the filter portion with respect to the scraping portion. 360a, 460), and
The ventilation apparatus according to claim 1. The filter part has an endless shape,
The relative movement separation structure circulates the filter unit to separate at least a part of the dust collected by the filter unit from the filter unit.
The ventilation apparatus according to claim 2. The filter portion has one end and the other end,
The relative movement separation structure separates at least a part of the dust collected by the filter unit from the filter unit by moving the filter unit.
The ventilation apparatus according to claim 2. The scraping portion is disposed in the bypass channel,
The ventilator according to any one of claims 2 to 4. The scraping portion has a brush (65, 66, 365, 365a, 465) that contacts the filter portion in a state where the position relative to the filter portion is relatively fluctuating.
The ventilation apparatus according to claim 5. An automatic control unit (70) that automatically performs a relative change in the position of the scraping unit with respect to the filter unit when a signal related to a predetermined relative movement is received;
The ventilator according to any one of claims 2 to 6. Switching that allows switching between a bypass state that allows air flow from the upstream exhaust passage to the bypass passage and a bypass prohibition state that does not allow air flow from the upstream exhaust passage to the bypass passage A mechanism (39, 339a, 339b, 539a, 539b),
The ventilator according to any one of claims 1 to 7. A fan control unit (70) for controlling the fan so that an air flow generated in the bypass channel is larger in the bypass state than in the bypass prohibition state;
The ventilator according to claim 8.

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