JP2020159659A - Heat exchange ventilator - Google Patents
Heat exchange ventilator Download PDFInfo
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- JP2020159659A JP2020159659A JP2019062148A JP2019062148A JP2020159659A JP 2020159659 A JP2020159659 A JP 2020159659A JP 2019062148 A JP2019062148 A JP 2019062148A JP 2019062148 A JP2019062148 A JP 2019062148A JP 2020159659 A JP2020159659 A JP 2020159659A
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- air supply
- air
- heat exchange
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- 238000009423 ventilation Methods 0.000 claims description 25
- 238000005259 measurement Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 description 25
- 238000012423 maintenance Methods 0.000 description 10
- 239000000428 dust Substances 0.000 description 8
- 230000007423 decrease Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 241000238631 Hexapoda Species 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/007—Ventilation with forced flow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
- F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
- F24F7/08—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit with separate ducts for supplied and exhausted air with provisions for reversal of the input and output systems
Abstract
Description
本発明は、室内空気を屋外へ排出し、屋外空気を室内へ供給して室内の換気を行う熱交換換気装置に関する。 The present invention relates to a heat exchange ventilation device that exhausts indoor air to the outside and supplies outdoor air to the room to ventilate the room.
従来、この種の換気装置として、野外空気を取り込む室外吸込口に給気フィルタを設け、野外空気に含まれるごみや砂塵、埃、虫等を取り除く換気装置が知られている（例えば、特許文献１）。ところが、長期間にわたり使用していると、給気フィルタが目詰まりする。給気フィルタが目詰まりすると、所定の給気風量を確保するために給気ファンを駆動する給気モータの消費電力が急増するおそれがあった。更には、給気風量が低下して換気装置の性能が得られなくなるおそれもあった。しかしながら、使用者は、給気フィルタが目詰まりしていることに気づきにくい。 Conventionally, as this type of ventilation device, there is known a ventilation device in which an air supply filter is provided at an outdoor suction port for taking in outdoor air to remove dust, dust, dust, insects, etc. contained in the outdoor air (for example, patent documents). 1). However, after long-term use, the air supply filter is clogged. If the air supply filter is clogged, the power consumption of the air supply motor that drives the air supply fan may increase rapidly in order to secure a predetermined air supply air volume. Furthermore, there is a risk that the air supply air volume will decrease and the performance of the ventilation system will not be obtained. However, the user is less likely to notice that the air supply filter is clogged.
特許文献１に記載の換気装置では、そのような課題を解決するために、初期段階において風量が一定となるように調整された給気モータの電流及び／又は回転数の初期値を記憶している。そして、再度風量が一定となるように調整された給気モータの電流及び／又は回転数と、記憶された電流及び／又は回転数の初期値との差が所定値以上であった場合に、給気フィルタが目詰まりである旨の報知を行う。 In the ventilation device described in Patent Document 1, in order to solve such a problem, the initial value of the current and / or the rotation speed of the air supply motor adjusted so that the air volume becomes constant at the initial stage is stored. There is. Then, when the difference between the current and / or rotation speed of the air supply motor adjusted so that the air volume becomes constant again and the initial value of the stored current and / or rotation speed is equal to or more than a predetermined value. Notifies that the air supply filter is clogged.
しかしながら、特許文献１の換気装置では、屋外で強い風が吹いているような環境や室内でドアの開閉が行われることにより偶発的にダクト内の静圧が大きく変化する場合に、目詰まりを判定する初期値が取得される可能性があった。そのような場合、記憶される給気モータの電流及び／又は回転数の初期値が、本来初期段階で調整され得る給気モータの電流及び／又は回転数と大きく異なる値となり、結果として、給気フィルタの目詰まりの報知を正しく検知することができないというおそれがあった。 However, the ventilation device of Patent Document 1 causes clogging when the static pressure in the duct accidentally changes significantly due to the opening and closing of the door in an environment where a strong wind is blowing outdoors or indoors. There was a possibility that the initial value to be judged could be obtained. In such a case, the stored initial value of the current and / or rotation speed of the air supply motor becomes a value significantly different from the current and / or rotation speed of the air supply motor that can be adjusted in the initial stage, and as a result, the supply There was a risk that the notification of clogging of the air filter could not be detected correctly.
本発明は、上記課題を解決するためになされたものであり、給気フィルタの目詰まりを精度よく検知することができる熱交換換気装置を提供することを目的とする。 The present invention has been made to solve the above problems, and an object of the present invention is to provide a heat exchange ventilation device capable of accurately detecting clogging of an air supply filter.
この目的を達成するために、本発明の熱交換換気装置は、室外吸込口と室内吹出口と室内吸込口と室外吹出口とを有する筐体と、室外吸込口から吸込んだ室外の空気と室内吸込口から吸込んだ室内の空気とを熱交換する熱交換素子と、前記室外吸込口から吸込んだ室外の空気が前記熱交換素子を介して室内給気口より室内に給気される熱交換給気風路と、前記室内吸込口から吸込んだ室内の空気が前記熱交換素子を介して室外排気口より室外に排気される熱交換排気風路と、前記熱交換給気風路内に設けられ、室内に空気を給気する給気ファンと、前記熱交換排気風路内に設けられ、室外に空気を排気する排気ファンと、前記熱交換給気風路内に設けられ室外の空気を浄化する給気フィルタと、前記給気ファンと前記排気ファンの電流及び／又は回転数を風量が一定となるように調整する制御部を備え、前記制御部は、前記給気ファンの回転数が所定の計測時間継続して所定の閾値以上になった場合の回数を積算値として算出し、前記積算値に基づいて前記給気フィルタの目詰まり状態を判定し、前記制御部が前記給気フィルタの目詰まり状態を判定した場合、前記給気フィルタの目詰まり状態を報知する報知部を備える。 In order to achieve this object, the heat exchange ventilator of the present invention has a housing having an outdoor suction port, an indoor air outlet, an indoor suction port, and an outdoor air outlet, and outdoor air sucked from the outdoor suction port and indoor air. A heat exchange element that exchanges heat with the indoor air sucked from the suction port and a heat exchange supply in which the outdoor air sucked from the outdoor suction port is supplied to the room from the indoor air supply port via the heat exchange element. The air passage, the heat exchange exhaust air passage in which the indoor air sucked from the indoor suction port is exhausted to the outside from the outdoor exhaust port via the heat exchange element, and the heat exchange air supply air passage provided in the room. An air supply fan that supplies air to the air, an exhaust fan that is provided in the heat exchange exhaust air passage and exhausts air to the outside, and an air supply that is provided in the heat exchange air supply air passage to purify the outdoor air. The control unit includes a filter and a control unit that adjusts the current and / or rotation speed of the air supply fan and the exhaust fan so that the air volume becomes constant. The control unit has a measurement time at which the rotation speed of the air supply fan is a predetermined time. The number of times when the value continuously exceeds a predetermined threshold is calculated as an integrated value, the clogged state of the air supply filter is determined based on the integrated value, and the control unit determines the clogged state of the air supply filter. Is provided, a notification unit for notifying the clogging state of the air supply filter is provided.
本発明の熱交換換気装置によれば、制御部によって、給気ファンの回転数が所定の計測時間継続して所定の閾値以上になった場合の回数を積算値として算出し、積算値に積算値が所定値以上となる場合に、給気フィルタが目詰まりである旨の報知を行う。これにより、給気フィルタの目詰まりを精度よく検知することができるという効果を得ることができる。 According to the heat exchange ventilation device of the present invention, the control unit calculates the number of times when the rotation speed of the air supply fan continues to exceed a predetermined threshold value for a predetermined measurement time as an integrated value, and integrates the integrated value. When the value is equal to or greater than the predetermined value, the air supply filter is notified that the air supply filter is clogged. As a result, it is possible to obtain the effect that clogging of the air supply filter can be detected with high accuracy.
本発明の熱交換装置は、室外吸込口と室内吹出口と室内吸込口と室外吹出口とを有する筐体と、室外吸込口から吸込んだ室外の空気と室内吸込口から吸込んだ室内の空気とを熱交換する熱交換素子と、前記室外吸込口から吸込んだ室外の空気が前記熱交換素子を介して室内給気口より室内に給気される熱交換給気風路と、前記室内吸込口から吸込んだ室内の空気が前記熱交換素子を介して室外排気口より室外に排気される熱交換排気風路と、前記熱交換給気風路内に設けられ、室内に空気を給気する給気ファンと、前記熱交換排気風路内に設けられ、室外に空気を排気する排気ファンと、前記熱交換給気風路内に設けられ室外の空気を浄化する給気フィルタと、前記給気ファンと前記排気ファンの運転を制御する制御部を備え、前記制御部は、前記給気ファンの回転数が所定の計測時間継続して所定の閾値以上になった場合の回数を積算値として算出し、前記積算値に基づいて前記給気フィルタの目詰まり状態を判定し、前記制御部が前記給気フィルタの目詰まり状態を判定した場合、前記給気フィルタの目詰まり状態を報知する報知部を備えている。 The heat exchange device of the present invention includes a housing having an outdoor suction port, an indoor air outlet, an indoor suction port, and an outdoor air outlet, an outdoor air sucked from the outdoor suction port, and an indoor air sucked from the indoor suction port. From the heat exchange element that exchanges heat, the heat exchange air passage through which the outdoor air sucked from the outdoor suction port is supplied to the room from the indoor air supply port via the heat exchange element, and the indoor suction port. A heat exchange exhaust air passage in which the sucked indoor air is exhausted to the outside from the outdoor exhaust port via the heat exchange element, and an air supply fan provided in the heat exchange air supply air passage to supply air into the room. An exhaust fan provided in the heat exchange exhaust air passage to exhaust air to the outside, an air supply filter provided in the heat exchange air supply air passage to purify the outdoor air, and the air supply fan and the above. A control unit for controlling the operation of the exhaust fan is provided, and the control unit calculates the number of times when the rotation speed of the air supply fan continues for a predetermined measurement time and becomes equal to or higher than a predetermined threshold value as an integrated value. When the clogging state of the air supply filter is determined based on the integrated value and the control unit determines the clogging state of the air supply filter, the notification unit for notifying the clogging state of the air supply filter is provided. There is.
この構成により、給気ファンの回転数が所定の計測時間継続して所定の閾値以上になった場合の回数を積算値として算出し、積算値に積算値が所定値以上となる場合に、給気フィルタが目詰まりである旨の報知を行う。これにより、屋外で強い風が吹いているような環境や室内でドアの開閉が行われることによる偶発的にダクト内の静圧が大きく変化する環境においても、給気フィルタの目詰まりの報知を精度よく行うことができるという効果を備える。 With this configuration, the number of times when the rotation speed of the air supply fan continues to exceed a predetermined threshold value for a predetermined measurement time is calculated as an integrated value, and when the integrated value exceeds the predetermined value, the supply is supplied. Notifies that the air filter is clogged. As a result, even in an environment where a strong wind is blowing outdoors or in an environment where the static pressure inside the duct changes significantly due to the opening and closing of the door indoors, the air supply filter is notified of clogging. It has the effect of being able to be performed accurately.
本発明における前記制御部は、前記積算値が所定の積算閾値を超えた場合、前記給気フィルタが目詰まり状態であると判定しても良い。 When the integrated value exceeds a predetermined integrated threshold value, the control unit in the present invention may determine that the air supply filter is in a clogged state.
この構成により、事前に測定された所定の積算閾値を設定することで、精度よく目詰まりの判定をすることができるという効果を備える。 This configuration has an effect that clogging can be accurately determined by setting a predetermined integration threshold value measured in advance.
また、本発明における前記制御部は、前記給気フィルタが目詰まり状態であると判定した場合、前記排気ファンの回転数を低減させても良い。 Further, when the control unit in the present invention determines that the air supply filter is in a clogged state, the rotation speed of the exhaust fan may be reduced.
この構成により、前記給気フィルタの目詰まりにより給気風量が低下した場合でも前記排気ファンの回転数を低減することで、室内を正圧に維持し埃や花粉の侵入を防止するという効果を備える。 With this configuration, even if the air supply air volume decreases due to clogging of the air supply filter, the rotation speed of the exhaust fan is reduced to maintain a positive pressure in the room and prevent dust and pollen from entering. Be prepared.
加えて、本発明における前記制御部は、前記積算値が前記積算閾値よりも大きい第二積算値を超えた場合、前記給気ファンを停止させる構成としても良い。 In addition, the control unit in the present invention may be configured to stop the air supply fan when the integrated value exceeds the second integrated value larger than the integrated threshold value.
前記給気フィルタは目詰まりが進行することで、徐々に給気風量が低下すると共に音・振動が増大するが、前記構成により、前記給気ファンによる給気風量が低下し音・振動が増大した時点で前記給気ファンを停止させることで音や振動を抑制するという効果を備える。 As the air supply filter becomes clogged, the air supply air volume gradually decreases and the sound and vibration increase. However, due to the configuration, the air supply air volume by the air supply fan decreases and the sound and vibration increase. It has the effect of suppressing noise and vibration by stopping the air supply fan at that point.
以下、本発明を実施するための形態について添付図面を参照して説明する。 Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings.
（第１実施形態）
まず、図１を参照して、本発明の第１実施形態に係る熱交換換気装置１について説明する。図１は、熱交換換気装置１を概略的に示す概略図である。熱交換換気装置１は、箱形の筐体（本体）２の側面に室外吹出口４及び室外吸込口５を有し、また、この側面に対向した側面に室内吸込口６及び室内吹出口７を設けている。
(First Embodiment)
First, the heat exchange ventilation device 1 according to the first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic view schematically showing the heat exchange ventilation device 1. The heat exchange ventilation device 1 has an outdoor air outlet 4 and an outdoor suction port 5 on the side surface of the box-shaped housing (main body) 2, and an indoor suction port 6 and an indoor air outlet 7 on the side surface facing the side surface. Is provided.
また、熱交換換気装置１は、室外吸込口５と室内吹出口７から吸込んだ室外の空気と室内吸込口６から吸込んだ室内の空気とを熱交換する熱交換素子１４を備えている。熱交換素子１４は、本発明の熱交換部を構成するものであり、熱交換給気風路８を通過する給気空気と、熱交換排気風路９を通過する排気空気との間で全熱交換方式による熱交換を行う。熱交換素子１４により、排気される空気の全熱（温度及び湿度）が給気される空気に供給される、または、給気される空気の全熱が排気される空気に供給される。なお、本発明において、熱交換素子１４は必ずしも必須の構成ではなく、熱交換素子１４が設けられていなくてもよい。 Further, the heat exchange ventilation device 1 includes a heat exchange element 14 that exchanges heat between the outdoor air sucked from the outdoor suction port 5 and the indoor air outlet 7 and the indoor air sucked from the indoor suction port 6. The heat exchange element 14 constitutes the heat exchange unit of the present invention, and is the total heat between the supply air passing through the heat exchange air supply air passage 8 and the exhaust air passing through the heat exchange exhaust air passage 9. Perform heat exchange by the exchange method. The heat exchange element 14 supplies the total heat (temperature and humidity) of the exhausted air to the air to be supplied, or supplies the total heat of the supplied air to the exhausted air. In the present invention, the heat exchange element 14 is not necessarily indispensable, and the heat exchange element 14 may not be provided.
室外吸込口５から吸込んだ室外の空気が熱交換素子１４を介して室内吹出口７より室内に給気される熱交換給気風路８と、室内吸込口６から吸込んだ室内の空気が熱交換素子１４を介して室外吹出口より室外に排気される熱交換排気風路９とを備えている。室外吸込口５から導入される新鮮な屋外空気（外気、給気空気）と、室内吸込口６から導入される汚染された室内空気（排気空気）は、給気ファン１２と排気ファン１３との運転によりそれぞれ熱交換給気風路８と熱交換排気風路９とを流れる。 The heat exchange air supply air passage 8 in which the outdoor air sucked from the outdoor suction port 5 is supplied to the room through the indoor air outlet 7 via the heat exchange element 14 and the indoor air sucked from the indoor suction port 6 heat exchange. It is provided with a heat exchange exhaust air passage 9 that is exhausted to the outside from the outdoor air outlet via the element 14. The fresh outdoor air (outside air, air supply air) introduced from the outdoor suction port 5 and the polluted indoor air (exhaust air) introduced from the indoor suction port 6 are the air supply fan 12 and the exhaust fan 13. By operation, the heat exchange air supply air passage 8 and the heat exchange exhaust air passage 9 flow respectively.
給気ファン１２は、制御部２０により駆動され、室外吸込口５から吸い込んだ給気空気を所定の給気風量で熱交換給気風路８を通して室内吹出口７へ導くものである。室内吹出口７へ導かれた空気は室内へ供給される。一方、排気ファン１３は、制御部２０により駆動され、室内吸込口６から吸い込んだ排気空気を所定の排気風量で熱交換排気風路９を通して室外吹出口４へ導くものである。室外吹出口４へ導かれた空気は、室外に排気される。 The air supply fan 12 is driven by the control unit 20 and guides the air supply air sucked from the outdoor suction port 5 to the indoor air outlet 7 through the heat exchange air supply air passage 8 at a predetermined air supply air volume. The air guided to the indoor air outlet 7 is supplied to the room. On the other hand, the exhaust fan 13 is driven by the control unit 20 and guides the exhaust air sucked from the indoor suction port 6 to the outdoor air outlet 4 through the heat exchange exhaust air passage 9 with a predetermined exhaust air volume. The air guided to the outdoor air outlet 4 is exhausted to the outside.
室外吸込口５には、給気フィルタ１５が設けられている。給気フィルタ１５は、野外空気に含まれるごみや砂塵、埃、虫等を取り除き、これらが室内へ導入されないようにするためのものである。 An air supply filter 15 is provided at the outdoor suction port 5. The air supply filter 15 is for removing dust, dust, dust, insects, etc. contained in the outdoor air and preventing them from being introduced into the room.
熱交換換気装置１には、筐体２の外面上に、又は、筐体２から離れた位置に、報知部２２と完了入力受付部２３とが設けられている。報知部２２は、例えば発光ダイオードにより構成され、給気フィルタ１５が目詰まりのときは発光ダイオードを点灯させ、目詰まりでないときは発光ダイオードを消灯させることで、給気フィルタ１５が目詰まりである旨を報知する。 The heat exchange ventilation device 1 is provided with a notification unit 22 and a completion input reception unit 23 on the outer surface of the housing 2 or at a position away from the housing 2. The notification unit 22 is composed of, for example, a light emitting diode, and the air supply filter 15 is clogged by turning on the light emitting diode when the air supply filter 15 is clogged and turning off the light emitting diode when the air supply filter 15 is not clogged. Notify that.
完了入力受付部２３は、例えば押下型のスイッチにより構成される。使用者又はメンテナンス作業者が給気フィルタ１５のメンテナンスを完了した場合に完了入力受付部２３の押下型スイッチを押下操作することにより、給気フィルタ１５のメンテナンスが完了した旨の入力が熱交換換気装置１にて受け付けられる。 The completion input receiving unit 23 is composed of, for example, a push-type switch. Completion when the user or maintenance worker completes the maintenance of the air supply filter 15 By pressing the push-type switch of the input reception unit 23, the input indicating that the maintenance of the air supply filter 15 is completed is heat exchange ventilation. Accepted by device 1.
熱交換換気装置１の内部または外部には、熱交換換気装置１の動作を制御する制御部２０が設けられている。制御部２０は、例えば、給気風量が一定となるように、給気ファン１２の電流（電流値）及び／又は回転数を調整する風量一定制御を実行する。また、制御部２０は、排気風量が一定となるように、排気ファン１３の電流（電流値）及び／又は回転数を調整する風量一定制御を実行する。 A control unit 20 for controlling the operation of the heat exchange ventilation device 1 is provided inside or outside the heat exchange ventilation device 1. The control unit 20 executes, for example, constant air volume control for adjusting the current (current value) and / or rotation speed of the air supply fan 12 so that the air supply air volume becomes constant. Further, the control unit 20 executes constant air volume control for adjusting the current (current value) and / or rotation speed of the exhaust fan 13 so that the exhaust air volume becomes constant.
また、制御部２０は、図２を参照して後述する目詰まり判定処理を実行することにより、給気フィルタ１５の目詰まりの有無を判定する。 Further, the control unit 20 determines whether or not the air supply filter 15 is clogged by executing a clogging determination process described later with reference to FIG. 2.
次いで、図２を参照して、制御部２０にて実行される目詰まり判定処理について説明する。図２は、その目詰まり判定処理を示すフローチャートである。この目詰まり判定処理では、制御部２０が所定時間Ｔ毎に給気風量が一定となるように調整された給気ファン１２の回転数を検出し、所定の計測時間継続して所定の閾値以上になった場合の回数を積算値として算出、判定することにより、給気フィルタ１５の目詰まり判定を行う。所定時間Ｔは、例えば３秒毎とし風量一定制御が安定しやすい時間としても良い。また、所定の計測時間は、例えば１時間とし、扉や窓の開閉、突発的な風による影響を無くすような時間設定としても良い。 Next, the clogging determination process executed by the control unit 20 will be described with reference to FIG. FIG. 2 is a flowchart showing the clogging determination process. In this clogging determination process, the control unit 20 detects the rotation speed of the air supply fan 12 adjusted so that the air supply air volume becomes constant every predetermined time T, and continues for a predetermined measurement time to exceed a predetermined threshold value. The clogging of the air supply filter 15 is determined by calculating and determining the number of times when the value is met as an integrated value. The predetermined time T may be, for example, every 3 seconds, and may be a time during which constant air volume control is likely to be stable. Further, the predetermined measurement time may be, for example, one hour, and the time may be set so as to eliminate the influence of opening and closing of doors and windows and sudden wind.
具体的には、目詰まり判定処理が実行されると、まず、制御部２０が給気ファン１２の回転数を検出する（Ｓ１）。その結果、給気ファン１２の回転数が不安定の間は（Ｓ２：Ｎｏ）、Ｓ２の処理を繰り返し、給気ファン１２の回転数が安定したと判断されると（Ｓ２：Ｙｅｓ）、Ｓ３の処理へ移行する。即ち、Ｓ２の処理によって、給気風量が一定となるように調整された給気ファン１２の回転数が安定するまで待機される。 Specifically, when the clogging determination process is executed, the control unit 20 first detects the rotation speed of the air supply fan 12 (S1). As a result, while the rotation speed of the air supply fan 12 is unstable (S2: No), the process of S2 is repeated, and when it is determined that the rotation speed of the air supply fan 12 is stable (S2: Yes), S3 Move to the processing of. That is, the process of S2 waits until the rotation speed of the air supply fan 12 adjusted so that the air supply air volume becomes constant becomes stable.
Ｓ３の処理では、給気ファン１２の現在の回転数ｒｐｍ＿ｎｏｗと、所定の回転数ｒｐｍ＿ＬＩＭＩＴより大きいか否か判断する（Ｓ３）。そして、給気ファン１２の現在の回転数ｒｐｍ＿ｎｏｗがｒｐｍ＿ＬＩＭＩＴより小さい場合（Ｓ４：Ｎｏ）、積算値ＣＯＵＮＴ＿ｎｏｗを「０」にし（Ｓ９）Ｓ１の処理へ戻る。所定の回転数ｒｐｍ＿ＬＩＭＩＴは、例えば、給気ファン１２が給気風量を一定となるように調整できる最大点の回転数としても良い。 In the process of S3, it is determined whether or not the current rotation speed rpm_now of the air supply fan 12 is larger than the predetermined rotation speed rpm_LIMIT (S3). Then, when the current rotation speed rpm_now of the air supply fan 12 is smaller than rpm_LIMIT (S4: No), the integrated value COUNT_now is set to "0" (S9) and the process returns to S1. The predetermined rotation speed rpm_LIMIT may be, for example, the rotation speed at the maximum point at which the supply air fan 12 can adjust the supply air volume to be constant.
一方、ｒｐｍ＿ｎｏｗがｒｐｍ＿ＬＩＭＩＴより大きいと判断されると（Ｓ４：Ｙｅｓ）、積算値ＣＯＵＮＴ＿ｎｏｗを「１」増加させＳ５の処理へ移行する。即ちＳ３の処理により、ｒｐｍ＿ｎｏｗがｒｐｍ＿ＬＩＭＩＴより大きくなるまで待機される。 On the other hand, when it is determined that rpm_now is larger than rpm_LIMIT (S4: Yes), the integrated value COUNT_now is increased by "1" and the process proceeds to S5. That is, the process of S3 waits until rpm_now becomes larger than rpm_LIMIT.
Ｓ５の処理では、積算値ＣＯＵＮＴ＿ｎｏｗが所定の継続時間（回数）ＦＩＬ＿ＴＩＭＥＲ１より大きいか否か判断する（Ｓ５）。そして、積算値ＣＯＵＮＴ＿ｎｏｗがＦＩＬ＿ＴＩＭＥＲ１より小さい場合（Ｓ５：Ｎｏ）、Ｓ１の処理へ戻る。一方、ＣＯＵＮＴ＿ｎｏｗがＦＩＬ＿ＴＩＭＥＲ１より大きいと判断されると（Ｓ５：Ｙｅｓ）、報知部２２の発光ダイオードを点灯させて、給気フィルタ１５が目詰まりである旨の報知を行い（Ｓ６）、Ｓ７の処理へ移行する。この時、目詰まりである旨の報知を行い排気ファン１３の回転数を低減しても良い。 In the process of S5, it is determined whether or not the integrated value COUNT_now is larger than the predetermined duration (number of times) FIL_TIMER1 (S5). Then, when the integrated value COUNT_now is smaller than FIL_TIMER1 (S5: No), the process returns to the process of S1. On the other hand, when it is determined that COUNT_now is larger than FIL_TIMER1 (S5: Yes), the light emitting diode of the notification unit 22 is turned on to notify that the air supply filter 15 is clogged (S6), and the process of S7. Move to. At this time, the rotation speed of the exhaust fan 13 may be reduced by notifying that the exhaust fan 13 is clogged.
Ｓ６において、排気ファン１３の回転数は所定時間Ｔ毎に段階的に減少又は所定回転数まで減少させる。これにより、給気フィルタ１５の目詰まりで風量が低下した場合にも室内を正圧に維持し屋外からの埃や花粉の侵入を防止することが可能となる。 In S6, the rotation speed of the exhaust fan 13 is gradually reduced or reduced to a predetermined rotation speed every predetermined time T. As a result, even when the air volume is reduced due to clogging of the air supply filter 15, it is possible to maintain a positive pressure in the room and prevent dust and pollen from entering from the outside.
また、ＦＩＬ＿ＴＩＭＥＲ１は、例えば１７５回とし、ｒｐｍ＿ｎｏｗがｒｐｍ＿ＬＩＭＩＴより大きい状態が１週間継続した場合に目詰まり検出とすることで、台風や一時的な気候の変動による空気密度の変化による誤動作を防止することが可能となる。 Further, FIL_TIMER1 is set to 175 times, for example, and clogging is detected when the state where rpm_now is larger than rpm_LIMIT continues for one week, thereby preventing malfunction due to a change in air density due to a typhoon or temporary climate change. Is possible.
Ｓ７の処理では完了入力受付部２３から給気フィルタ１５のメンテナンスが完了したか否か判断する（Ｓ７）。そして、完了入力受付部２３からメンテナンスの完了が入力された場合（Ｓ７：Ｙｅｓ）、報知部２２の発光ダイオードを消灯させて、給気フィルタ１５が目詰まりである旨の報知を終了する（Ｓ８）。この時、排気ファン１３の回転数を初期状態に戻しても良い。一方、完了入力受付部２３からメンテナンスの完了が入力されなかった場合（Ｓ７：Ｎｏ）、Ｓ１１の処理へ移行する。 In the process of S7, the completion input receiving unit 23 determines whether or not the maintenance of the air supply filter 15 is completed (S7). Then, when the completion of maintenance is input from the completion input receiving unit 23 (S7: Yes), the light emitting diode of the notification unit 22 is turned off, and the notification that the air supply filter 15 is clogged is terminated (S8). ). At this time, the rotation speed of the exhaust fan 13 may be returned to the initial state. On the other hand, when the completion of maintenance is not input from the completion input receiving unit 23 (S7: No), the process proceeds to S11.
Ｓ１１の処理では積算値ＣＯＵＮＴ＿ｎｏｗが所定の継続時間（回数）ＦＩＬ＿ＴＩＭＥＲ２より大きいか否か判断する（Ｓ１１）。そして、積算値ＣＯＵＮＴ＿ｎｏｗがＦＩＬ＿ＴＩＭＥＲ２より小さい場合（Ｓ１１：Ｎｏ）、Ｓ１の処理へ戻る。一方、ＣＯＵＮＴ＿ｎｏｗがＦＩＬ＿ＴＩＭＥＲ２より大きいと判断されると（Ｓ１１：Ｙｅｓ）、給気ファン１２を停止させる（Ｓ１２）。これにより、風量一定制御で出力が増大した給気ファン１２による過度な振動・騒音を防止することができる。この時、Ｓ６の処理で回転数を減少させた排気ファンの回転数を元の換気風量設定に戻しても良い。ＦＩＬ＿ＴＩＭＥＲ２は、例えば、７２０回とし、ｒｐｍ＿ｎｏｗがｒｐｍ＿ＬＩＭＩＴより大きい状態が１ヶ月継続した場合に異常な目詰まりとして検出させても良い。 In the process of S11, it is determined whether or not the integrated value COUNT_now is larger than the predetermined duration (number of times) FIL_TIMER2 (S11). Then, when the integrated value COUNT_now is smaller than FIL_TIMER2 (S11: No), the process returns to the process of S1. On the other hand, when it is determined that COUNT_now is larger than FIL_TIMER2 (S11: Yes), the air supply fan 12 is stopped (S12). As a result, it is possible to prevent excessive vibration and noise caused by the air supply fan 12 whose output is increased by controlling the constant air volume. At this time, the rotation speed of the exhaust fan whose rotation speed has been reduced by the processing of S6 may be returned to the original ventilation air volume setting. FIL_TIMER2 may be set to, for example, 720 times, and may be detected as abnormal clogging when a state in which rpm_now is larger than rpm_LIMIT continues for one month.
次いで、Ｓ１３の処理では、完了入力受付部２３から給気フィルタ１５のメンテナンスが完了したか否か判断する（Ｓ１３）。そして、完了入力受付部２３からメンテナンスの完了が入力された場合（Ｓ１３：Ｙｅｓ）、報知部２２の発光ダイオードを消灯させて、給気フィルタ１５が目詰まりである旨の報知を終了する（Ｓ１４）。この時、給気ファン１２の運転を開始する。一方、完了入力受付部２３からメンテナンスの完了が入力されなかった場合（Ｓ１３：Ｎｏ）、Ｓ１の処理へ戻る。即ち、メンテナンスの完了が行われるまでは、給気ファン１２の停止又は排気ファン１３の回転数減少が継続される。 Next, in the process of S13, it is determined from the completion input receiving unit 23 whether or not the maintenance of the air supply filter 15 is completed (S13). Then, when the completion of maintenance is input from the completion input receiving unit 23 (S13: Yes), the light emitting diode of the notification unit 22 is turned off, and the notification that the air supply filter 15 is clogged is terminated (S14). ). At this time, the operation of the air supply fan 12 is started. On the other hand, when the completion of maintenance is not input from the completion input receiving unit 23 (S13: No), the process returns to the process of S1. That is, until the maintenance is completed, the air supply fan 12 is stopped or the rotation speed of the exhaust fan 13 is continuously reduced.
本実施の形態では給気フィルタ１５について記載を行ったが、排気ファン１３側に排気フィルタを設け同様のフィルタ目詰まりを行うことで排気フィルタの目詰まり検出を行っても良い。 Although the air supply filter 15 has been described in the present embodiment, the clogging of the exhaust filter may be detected by providing an exhaust filter on the exhaust fan 13 side and performing the same filter clogging.
以上、実施形態に基づき本発明を説明したが、本発明は上記実施形態に何ら限定されるものではなく、本発明の趣旨を逸脱しない範囲内で種々の改良変形が可能であることは容易に推察できるものである。また、上記各実施形態で挙げた数値は一例であり、他の数値を採用することは当然可能である。 Although the present invention has been described above based on the embodiments, the present invention is not limited to the above embodiments, and it is easy to make various improvements and modifications without departing from the spirit of the present invention. It can be inferred. Further, the numerical values given in each of the above embodiments are examples, and it is naturally possible to adopt other numerical values.
本発明に係る熱交換換気装置は、室内空気を屋外へ排出し、屋外空気を室内へ供給して室内の換気を行う熱交換換気装置として有効である。 The heat exchange ventilation device according to the present invention is effective as a heat exchange ventilation device that exhausts indoor air to the outside and supplies outdoor air to the room to ventilate the room.
１ 熱交換換気装置
２ 筐体
４ 室外吹出口
５ 室外吸込口
６ 室内吸込口
７ 室内吹出口
８ 熱交換給気風路
９ 熱交換排気風路
１０ 給気モータ
１２ 給気ファン
１３ 排気ファン
１４ 熱交換素子
１５ 給気フィルタ
２０ 制御部
２２ 報知部
２３ 完了入力受付部
1 Heat exchange ventilation device 2 Housing 4 Outdoor air outlet 5 Outdoor air inlet 6 Indoor air inlet 7 Indoor air outlet 8 Heat exchange air supply air passage 9 Heat exchange exhaust air passage 10 Air supply motor 12 Air supply fan 13 Exhaust fan 14 Heat exchange Element 15 Air supply filter 20 Control unit 22 Notification unit 23 Completion input reception unit
Claims (4)
室外吸込口から吸込んだ室外の空気と室内吸込口から吸込んだ室内の空気とを熱交換する熱交換素子と、
前記室外吸込口から吸込んだ室外の空気が前記熱交換素子を介して室内給気口より室内に給気される熱交換給気風路と、
前記室内吸込口から吸込んだ室内の空気が前記熱交換素子を介して室外排気口より室外に排気される熱交換排気風路と、
前記熱交換給気風路内に設けられ、室内に空気を給気する給気ファンと、
前記熱交換排気風路内に設けられ、室外に空気を排気する排気ファンと、
前記熱交換給気風路内に設けられ室外の空気を浄化する給気フィルタと、
前記給気ファンと前記排気ファンの運転を制御する制御部を備え、
前記制御部は、前記給気ファンの回転数が所定の計測時間継続して所定の閾値以上になった場合の回数を積算値として算出し、前記積算値に基づいて前記給気フィルタの目詰まり状態を判定し、
前記制御部が前記給気フィルタの目詰まり状態を判定した場合、前記給気フィルタの目詰まり状態を報知する報知部を備えることを特徴とする熱交換換気装置。 A housing having an outdoor suction port, an indoor air outlet, an indoor suction port, and an outdoor air outlet,
A heat exchange element that exchanges heat between the outdoor air sucked from the outdoor suction port and the indoor air sucked from the indoor suction port.
A heat exchange air supply air passage in which the outdoor air sucked from the outdoor suction port is supplied to the room through the indoor air supply port via the heat exchange element.
A heat exchange exhaust air passage in which indoor air sucked from the indoor suction port is exhausted to the outside through the outdoor exhaust port via the heat exchange element, and
An air supply fan provided in the heat exchange air supply air passage to supply air into the room, and
An exhaust fan provided in the heat exchange exhaust air passage and exhausting air to the outside,
An air supply filter provided in the heat exchange air supply air passage to purify the outdoor air, and
A control unit that controls the operation of the air supply fan and the exhaust fan is provided.
The control unit calculates as an integrated value the number of times when the rotation speed of the air supply fan continues to exceed a predetermined threshold value for a predetermined measurement time, and the air supply filter is clogged based on the integrated value. Judge the condition and
A heat exchange ventilation device including a notification unit that notifies the clogged state of the air supply filter when the control unit determines the clogged state of the air supply filter.
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