JP3991586B2

JP3991586B2 - Outside air treatment unit

Info

Publication number: JP3991586B2
Application number: JP2000383663A
Authority: JP
Inventors: 直藤城; 卓也佐伯
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2000-12-18
Filing date: 2000-12-18
Publication date: 2007-10-17
Anticipated expiration: 2020-12-18
Also published as: JP2002188843A

Description

【０００１】
【発明の属する技術分野】
本発明は、少なくとも給気機能を有する外気処理ユニットにおいて、外気を室内に導入する際に熱源機を用いて、外気を加熱、冷却、除湿する機能を有し、除湿運転時に室温を低下させないように処理空気を一旦冷却してから加熱するための二つのコイルを有する外気処理ユニットの運転モード自動制御に関するものである。特に、その除湿運転モードにおいて、センサやコイルの異常で運転不能となったときの異常処理に関する。
【０００２】
【従来の技術】
外気処理ユニットに関するものとしては、特開平８−１４６００号公報に、冷房運転時に外気の除湿を行なって、排気と給気の空気間で熱交換しながら換気を、暖房運転時に外気に加湿を行なって、排気と給気の空気間で熱交換しながら換気をするものの構造が提案されている。
【０００３】
【発明が解決しようとする課題】
特開平８−１４６００号公報における外気処理ユニットは、外気を処理して室内に導入するもので、特に温度、湿度の独立制御を主体としたものである。しかし、自動運転時における異常発生に対する対応処置については言及されていない。
【０００４】
【課題を解決するための手段】
本発明に係る外気処理ユニットは、外気温度を検知する外気温センサと、室内湿度を検知する湿度センサと、給気口に連なる通風路に設置され、外気を加熱または冷却する第１のコイルと、第１のコイルの下流側に設置され、第１のコイルを通過した空気を加熱する第２のコイルと、第２のコイルの表面温度を検知する第２の温度センサとを有する外気処理ユニットにおいて、加熱動作時の第２のコイルが過加熱であることまたは加熱していないことを第２の温度センサの値に基づき判断して第２のコイルにおける異常の発生とし、外気温センサのみの値に応じて冷房運転または送風運転のいずれかを決定する運転モード決定手段と、湿度センサの所定の基準値によって除湿運転を行なうか否かの決定をする除湿運転決定手段と、を有し、湿度センサの値に基づき湿度センサにおける異常の発生を判断した場合または第２のコイルにおける異常の発生を判断した場合、除湿運転決定手段は除湿運転しないことを決定し、運転モード決定手段の決定した運転モードに従って運転を継続する手段を備えたものである。
【０００５】
また、本発明に係る外気処理ユニットは、外気温度を検知する外気温センサと、室内湿度を検知する湿度センサと、給気口に連なる通風路に設置され、外気を加熱または冷却する第１のコイルと、第１のコイルの表面温度を検知する第１の温度センサと、第１のコイルの下流側に設置され、第１のコイルを通過した空気を加熱または冷却する第２のコイルと、第２のコイルの表面温度を検知する第２の温度センサとを有する外気処理ユニットにおいて、外気温センサの値に応じて冷房運転、暖房運転または送風運転のいずれかを決定する運転モード決定手段と、運転モード決定手段にて冷房運転または送風運転のいずれかが選択された場合、湿度センサの所定の基準値によって除湿運転を行なうか否かの決定をする除湿運転決定手段と、を有し、加熱動作時の第１のコイルが過加熱であることもしくは加熱していないこと、または冷却動作時の第１のコイルが過冷却であることもしくは冷却していないことを第１の温度センサの値に基づき判断して第１のコイルにおける異常の発生とし、加熱動作時の第２のコイルが過加熱であることもしくは加熱していないこと、または冷却動作時の第２のコイルが過冷却であることもしくは冷却していないことを第２の温度センサの値に基づき判断して第２のコイルにおける異常の発生とし、湿度センサの値に基づき湿度センサにおける異常の発生を判断した場合には、除湿運転決定手段は除湿運転しないことを決定して運転モード決定手段の決定した運転モードに従って運転を継続し、第１のコイルにおける異常の発生を判断した場合または第２のコイルにおける異常の発生を判断した場合には、除湿運転決定手段は除湿運転しないことを決定するとともに第１のコイルまたは第２のコイルのうちコイルにおける異常が発生したと判断されたコイルの動作を停止して、運転モード決定手段の決定した運転モードに従って運転を継続する手段を備えたものである。
【０００６】
【発明の実施の形態】
発明の実施の形態１．
図１に本発明の実施の形態１に係る外気処理ユニットの構成ブロック図を示す。図において、本発明に係る外気処理ユニットは、ユニット本体１に、制御全般を行なう制御装置２と、給気空気と排気空気の熱交換を行なう全熱交換器３と、外部熱源機（図示しない）から冷暖用の冷媒を循環させる第１のコイル４と、外部熱源機（図示しない）から暖房用の冷媒を循環させる、または電気ヒーターからなる第２のコイル５と、加湿器６と、加湿器６に給止水する電磁弁１３と、送風能力可変の排気ファン７と、送風能力可変の給気ファン８という複数の内部機能部品を有している。
【０００７】
さらに、本発明に係る外気処理ユニットは、外気空気の温度を検知する外気温センサ９と、室内空気の温度を検知する室温センサ１０と、室内湿度を検知する湿度センサ１１と、前記第１のコイルの表面温度を検知する温度センサ２０と、前記第２のコイルの表面温度を検知する温度センサ２１という複数のセンサ類を有している。
【０００８】
さらに、本発明に係る外気処理ユニットは、ユニット本体１に外気を導入する外気口１４と、ユニット本体１から排気空気を排出する排気口１５と、ユニット本体１に室内排気空気を吸込む還気口１６と、ユニット本体１から室内に新鮮空気を送る給気口１７という複数の通気口を有している。
【０００９】
さらに、本発明に係る外気処理ユニットは、全熱交換器３をバイパスするバイパス経路を開閉するバイパスダンパ１８と、外気口１４から導入された空気の通過する第１の通風路２５と、第１の通風路２５から全熱交換器運転時は全熱交換器３を通過し、バイパス換気運転時はバイパスダンパ１８を通過し得る第２の通風路２６と、還気口１６から導入された空気の通過する第３の通風路２７と、還気口１６から導入された空気が第３の通風路２７から全熱交換器３を通過する第４の通風路２８という複数の通風路を有している。
【００１０】
さらに、本発明に係る外気処理ユニットは、手動運転用リモコン２９と、制御装置２に付随する自動運転／手動運転切換スイッチ３０とを有している。
【００１１】
次に動作について説明する。まず、本外気処理ユニットの持つ四つの運転モードについて説明する。
送風モード時は、給気ファン８、排気ファン７を駆動、第１のコイル４による加熱、冷却機能を停止、第２のコイル５による加熱機能を停止、さらに加湿器６も停止として、通常の換気運転を行なう。
【００１２】
冷房モード時は、給気ファン８、排気ファン７を駆動、第１のコイル４を冷却運転、第２のコイル５および加湿器６は停止させる。この冷房モードにおける室内温度制御は室内温度センサ１０の検知温度を、予め設定しておいた冷房目標温度（例えば、２８℃）と比較しながら行なう。
【００１３】
暖房モード時は、給気ファン８、排気ファン７を駆動、第１のコイル４を加熱運転、第２のコイル５は室内空調負荷に応じて適宜加熱運転、さらに加湿器６を運転させる。この暖房モードにおける室内温度制御は室内温度センサ１０の検知温度を、予め設定しておいた暖房目標温度（例えば、１６℃）と比較しながら行なう。
【００１４】
除湿モード時は、給気ファン８、排気ファン７を駆動、第１のコイル４を冷却運転、第２のコイル５を加熱運転、加湿器６は停止させる。この除湿モードにおける室内温度制御は、除湿モード開始直後の室内温度センサ１０の検知温度を目標温度として、室温センサ１０の検知温度により第１のコイル４あるいは第２のコイル５の能力を変化させて行なう。
【００１５】
自動運転／手動運転切換スイッチ３０が、リモコン２９により手動運転に設定されている場合は、上記した送風、冷房、暖房、除湿の各運転モードが使用者のリモコン２９による指令によって選択され、モード固定で運転される。
【００１６】
自動運転／手動運転切換スイッチ３０が、リモコン２９により自動運転に設定されている場合は、図２に示すような自動運転切換状態判定ＭＡＰに従って上記した送風、冷房、暖房、除湿の各運転モードが自動的に切り換わり運転される。
【００１７】
以下、自動運転時の動作について説明する。
運転モードの切換は、第１の通風路２５に設置された外気温センサ９と、第３の通風路２７に設置された湿度センサ１１の検知する外気温度および室内湿度による。
【００１８】
自動運転開始時、特に停止状態からの起動の場合には、外気温センサ９と湿度センサ１１が安定するまでの間、例えば３分間は送風モードで運転され、その後、自動運転がスタートする。
【００１９】
まず、運転モード決定手段が、外気温度によって図２に示す自動運転切換状態判定ＭＡＰに従って、例えば、外気温度が１４℃未満であれば暖房運転、外気温度が１４℃以上、２６℃未満であれば送風運転、外気温度が２６℃以上であれば冷房運転をするように判定して運転モードを切り換える。
【００２０】
次に、運転モードが送風および冷房運転の場合には、除湿運転決定手段が、湿度センサ１１の値に応じて除湿運転の可否を決定する。
例えば、送風運転時、室内湿度が７０％以上であれば除湿運転へ切換え、７０％未満であれば送風運転を続行する。
冷房運転時には、室内湿度７０％以上でしかも外気温度が２８℃以上であれば冷房運転を続行、室内湿度７０％以上でしかも外気温度が２８℃未満であれば除湿運転へ切換え、室内湿度７０％未満であれば冷房運転を続行する。
【００２１】
制御装置２は、例えば、湿度センサ１１が相対湿度範囲１０％以下および９５％以上を検知結果としている場合に湿度の正常値を検知していないとして湿度センサ１１の動作異常と判断する。
【００２２】
また、制御装置２は、第１のコイル４および第２のコイル５の表面に設置されている温度センサ２０、２１の温度状態を監視し、加熱時の過加熱または加熱しない、冷却時の過冷却または冷却しないときをコイルの異常と判断する。
【００２３】
運転モード決定手段が運転モードを決定後、除湿運転決定手段で除湿運転の可否を判断する際、湿度センサ１１が上記したような異常であれば、制御装置２は、除湿運転決定手段で除湿運転不可と判断し、運転モード決定手段にて決定した運転モードで運転を継続する。
【００２４】
また、除湿運転決定手段にて除湿運転を決定して除湿運転開始後、第２のコイル５に設置された温度センサ２１が第２のコイル５の加熱異常発生を検知した場合、制御装置２は、除湿運転決定手段で除湿運転の継続が不可能と判断して運転モード決定手段にて決定した運転モードで運転を継続する。
【００２５】
発明の実施の形態２．
発明の実施の形態２において、第２のコイルは外部熱源機から冷暖用の冷媒を循環させる加熱冷却可能なものとしている。その他の構成は発明の実施形態１と同じである。
【００２６】
運転モード決定手段が運転モードを決定後、除湿運転決定手段で除湿運転の可否を判断する際、湿度センサ１１が上記したような異常であれば、制御装置２は、除湿運転決定手段で除湿運転不可と判断し、運転モード決定手段にて決定した運転モードで運転を継続する。
【００２７】
運転モード決定手段が運転モードを決定後、除湿運転決定手段にて除湿運転を決定して除湿運転開始後、第１のコイル４に設置された温度センサ２０が第１のコイル４の異常発生を検知した場合、制御装置２は、除湿運転決定手段で除湿運転の継続が不可能と判断して第１のコイルの動作を停止し、第２のコイル５に冷暖動作をまかなわせて運転モード決定手段にて決定した運転モードで運転を継続する。
【００２８】
【発明の効果】
本発明に係る外気処理ユニットは、湿度センサに異常が発生、第１のコイルまたは第２のコイルに運転異常が発生した場合に、制御装置が除湿運転への切換あるいは除湿運転の継続を行なわず、運転モード決定手段にて決定した運転モードで運転を継続するので、居室内の温熱環境を最低限確保することができる。したがって、居住者が長期不在の場合などにおいて、居室内の衣服や家具等の物品の劣化を防止することができる。
【図面の簡単な説明】
【図１】本発明に係る外気処理ユニットの構成ブロック図。
【図２】本発明に係る外気処理ユニットの自動運転切換状態判定ＭＡＰ。
【符号の説明】
１ユニット本体、２制御装置、３全熱交換器、
４第１のコイル、５第２のコイル、６加湿器、
７排気ファン、８給気ファン、９外気温センサ、
１０室温センサ、１１湿度センサ、１３電磁弁、
１４外気口、１５排気口、１６還気口、
１７給気口、１８バイパスダンパ、
２０第１のコイル表面温度センサ、
２１第２のコイル表面温度センサ、
２５第１の通風路、２６第２の通風路、
２７第３の通風路、２８第４の通風路、
２９リモコン、
３０自動運転／手動運転切換スイッチ、[0001]
BACKGROUND OF THE INVENTION
The present invention has a function of heating, cooling, and dehumidifying the outside air by using a heat source device when the outside air is introduced into the room at least in the outside air processing unit having an air supply function so as not to lower the room temperature during the dehumidifying operation. Further, the present invention relates to an automatic operation mode control of an outside air processing unit having two coils for once cooling and heating the processing air. In particular, in the dehumidifying operation mode, the present invention relates to an abnormality process when operation becomes impossible due to an abnormality of a sensor or a coil.
[0002]
[Prior art]
As for the outside air processing unit, Japanese Patent Application Laid-Open No. 8-14600 discloses dehumidification of outside air during cooling operation, ventilation while exchanging heat between the exhaust air and supply air, and humidification of outside air during heating operation. Thus, there has been proposed a structure in which ventilation is performed while exchanging heat between exhaust and supply air.
[0003]
[Problems to be solved by the invention]
The outside air processing unit in Japanese Patent Application Laid-Open No. 8-14600 processes outside air and introduces it into the room, and is mainly based on independent control of temperature and humidity. However, there is no mention of countermeasures for abnormal occurrence during automatic operation.
[0004]
[Means for Solving the Problems]
An outside air processing unit according to the present invention includes an outside air temperature sensor that detects outside air temperature, a humidity sensor that detects indoor humidity, a first coil that is installed in a ventilation path connected to an air supply port, and heats or cools outside air. An outside air processing unit that is installed on the downstream side of the first coil and has a second coil that heats the air that has passed through the first coil, and a second temperature sensor that detects the surface temperature of the second coil. , The second coil during the heating operation is overheated or not heated based on the value of the second temperature sensor, and an abnormality occurs in the second coil. An operation mode determining means for determining either a cooling operation or an air blowing operation according to a value, and a dehumidifying operation determining means for determining whether or not to perform a dehumidifying operation according to a predetermined reference value of a humidity sensor, Wet If the case is judged an occurrence of abnormality in the humidity sensor based on the value of the sensor or it is determined the occurrence of the abnormality in the second coil, dehumidifying operation determination means determines not to dehumidifying operation, and the determination of the driving mode determination means Means for continuing the operation according to the operation mode are provided .
[0005]
In addition, an outside air processing unit according to the present invention is installed in an outside air temperature sensor that detects outside air temperature, a humidity sensor that detects room humidity, and a ventilation path that is connected to an air supply port, and heats or cools outside air. A coil, a first temperature sensor that detects a surface temperature of the first coil, a second coil that is installed downstream of the first coil and that heats or cools the air that has passed through the first coil; In an outside air processing unit having a second temperature sensor for detecting the surface temperature of the second coil, an operation mode determining means for determining any one of the cooling operation, the heating operation and the air blowing operation according to the value of the outside air temperature sensor; A dehumidifying operation determining means for determining whether or not to perform the dehumidifying operation according to a predetermined reference value of the humidity sensor when either the cooling operation or the air blowing operation is selected by the operation mode determining means. , The first coil during the heating operation can not be or heating is over-heating, or cooling operation when the first coil of the first temperature sensor that is not possible or cooling is subcooled Based on the value, the first coil is abnormally generated, the second coil during the heating operation is overheated or not heated, or the second coil during the cooling operation is overcooled. If it is determined that there is or is not cooled based on the value of the second temperature sensor and an abnormality occurs in the second coil, and the occurrence of an abnormality in the humidity sensor is determined based on the value of the humidity sensor , dehumidifying operation determining means continue to operate in accordance with the determined operation mode of the operation mode determining means determines that no dehumidifying operation, place Goma et determines the occurrence of abnormality in the first coil When determining the occurrence of abnormality in the second coil, dehumidification determining means of coils abnormalities in the coil is determined to have occurred within the first coil or the second coil and determines that no dehumidification It stopped operating, but provided with means to continue the operation according to the determined operation mode of the operation mode determining means.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 of the Invention
FIG. 1 shows a configuration block diagram of an outside air processing unit according to Embodiment 1 of the present invention. In the figure, an outside air processing unit according to the present invention includes a control device 2 that performs overall control, a total heat exchanger 3 that performs heat exchange between supply air and exhaust air, and an external heat source device (not shown). ) From the first coil 4 that circulates the cooling / warming refrigerant, the second coil 5 that circulates the heating refrigerant from an external heat source (not shown), or an electric heater, the humidifier 6, and the humidifier. It has a plurality of internal functional parts such as an electromagnetic valve 13 for stopping and supplying water to the vessel 6, an exhaust fan 7 having a variable blowing capacity, and an air supply fan 8 having a variable blowing capacity.
[0007]
Furthermore, an outside air processing unit according to the present invention includes an outside air temperature sensor 9 that detects the temperature of outside air, a room temperature sensor 10 that detects the temperature of room air, a humidity sensor 11 that detects room humidity, and the first sensor. A plurality of sensors, that is, a temperature sensor 20 that detects the surface temperature of the coil and a temperature sensor 21 that detects the surface temperature of the second coil are provided.
[0008]
Furthermore, the outside air processing unit according to the present invention includes an outside air port 14 that introduces outside air into the unit body 1, an exhaust port 15 that discharges exhaust air from the unit body 1, and a return air port that sucks indoor exhaust air into the unit body 1. 16 and a plurality of ventilation holes called air supply openings 17 for sending fresh air from the unit main body 1 into the room.
[0009]
Furthermore, the outside air processing unit according to the present invention includes a bypass damper 18 that opens and closes a bypass path that bypasses the total heat exchanger 3, a first ventilation path 25 through which air introduced from the outside air port 14 passes, The air introduced from the return vent 16 and the second ventilation passage 26 that can pass through the total heat exchanger 3 during the total heat exchanger operation and the bypass damper 18 during the bypass ventilation operation. And a third ventilation path 27 through which the air introduced from the return air port 16 passes through the total heat exchanger 3 from the third ventilation path 27 and has a plurality of ventilation paths 28. ing.
[0010]
Furthermore, the outside air processing unit according to the present invention includes a manual operation remote controller 29 and an automatic operation / manual operation switch 30 associated with the control device 2.
[0011]
Next, the operation will be described. First, four operation modes of the outside air processing unit will be described.
In the air blowing mode, the air supply fan 8 and the exhaust fan 7 are driven, the heating and cooling functions by the first coil 4 are stopped, the heating function by the second coil 5 is stopped, and the humidifier 6 is also stopped. Ventilate operation.
[0012]
In the cooling mode, the air supply fan 8 and the exhaust fan 7 are driven, the first coil 4 is cooled, and the second coil 5 and the humidifier 6 are stopped. The indoor temperature control in the cooling mode is performed by comparing the temperature detected by the indoor temperature sensor 10 with a preset cooling target temperature (for example, 28 ° C.).
[0013]
In the heating mode, the air supply fan 8 and the exhaust fan 7 are driven, the first coil 4 is heated, the second coil 5 is appropriately heated according to the indoor air conditioning load, and the humidifier 6 is operated. The indoor temperature control in the heating mode is performed while comparing the temperature detected by the indoor temperature sensor 10 with a preset heating target temperature (for example, 16 ° C.).
[0014]
In the dehumidifying mode, the air supply fan 8 and the exhaust fan 7 are driven, the first coil 4 is cooled, the second coil 5 is heated, and the humidifier 6 is stopped. The indoor temperature control in the dehumidifying mode is performed by changing the ability of the first coil 4 or the second coil 5 according to the detected temperature of the room temperature sensor 10 with the detected temperature of the indoor temperature sensor 10 immediately after the start of the dehumidifying mode as a target temperature. Do.
[0015]
When the automatic operation / manual operation changeover switch 30 is set to manual operation by the remote controller 29, the above-described operation modes of air blowing, cooling, heating, and dehumidification are selected by commands from the user's remote controller 29, and the mode is fixed. It is driven by.
[0016]
When the automatic operation / manual operation changeover switch 30 is set to automatic operation by the remote controller 29, the above-described operation modes of blowing, cooling, heating, and dehumidification are performed according to the automatic operation switching state determination MAP as shown in FIG. It is automatically switched and operated.
[0017]
The operation during automatic operation will be described below.
The switching of the operation mode depends on the outside air temperature and the room humidity detected by the outside air temperature sensor 9 installed in the first ventilation path 25 and the humidity sensor 11 installed in the third ventilation path 27.
[0018]
At the start of automatic operation, particularly in the case of activation from a stopped state, operation is performed in the air blowing mode for 3 minutes, for example, until the outside air temperature sensor 9 and the humidity sensor 11 are stabilized, and then automatic operation is started.
[0019]
First, according to the automatic operation switching state determination MAP shown in FIG. 2 according to the outside air temperature, the operation mode determining means, for example, if the outside air temperature is less than 14 ° C., heating operation, and if the outside air temperature is 14 ° C. or more and less than 26 ° C. When the air blowing operation and the outside air temperature are 26 ° C. or higher, it is determined to perform the cooling operation, and the operation mode is switched.
[0020]
Next, when the operation mode is air blowing and cooling operation, the dehumidifying operation determining means determines whether or not the dehumidifying operation is possible according to the value of the humidity sensor 11.
For example, during the blowing operation, if the indoor humidity is 70% or more, the operation is switched to the dehumidifying operation, and if it is less than 70%, the blowing operation is continued.
During the cooling operation, if the indoor humidity is 70% or higher and the outside air temperature is 28 ° C or higher, the cooling operation is continued. If the indoor humidity is 70% or higher and the outdoor air temperature is lower than 28 ° C, the operation is switched to the dehumidifying operation. If it is less, continue the cooling operation.
[0021]
For example, when the humidity sensor 11 detects the relative humidity range of 10% or less and 95% or more as a detection result, the control device 2 determines that the humidity sensor 11 is not operating normally and determines that the humidity sensor 11 is operating abnormally.
[0022]
In addition, the control device 2 monitors the temperature state of the temperature sensors 20 and 21 installed on the surfaces of the first coil 4 and the second coil 5, and overheats during heating or does not heat. The coil is judged to be abnormal when it is cooled or not cooled.
[0023]
If the humidity sensor 11 is abnormal as described above when the operation mode determining unit determines the operation mode and the dehumidifying operation determining unit determines whether or not the dehumidifying operation is possible, the controller 2 performs the dehumidifying operation using the dehumidifying operation determining unit. The operation is determined to be impossible, and the operation is continued in the operation mode determined by the operation mode determination means.
[0024]
In addition, after the dehumidifying operation is determined by the dehumidifying operation determining means and the dehumidifying operation is started, when the temperature sensor 21 installed in the second coil 5 detects the heating abnormality of the second coil 5, the control device 2 Then, it is determined that the dehumidifying operation cannot be continued by the dehumidifying operation determining means, and the operation is continued in the operation mode determined by the operating mode determining means.
[0025]
Embodiment 2 of the Invention
In the second embodiment of the present invention, the second coil can be heated and cooled by circulating a cooling / heating refrigerant from an external heat source device. Other configurations are the same as those of the first embodiment.
[0026]
If the humidity sensor 11 is abnormal as described above when the operation mode determining unit determines the operation mode and the dehumidifying operation determining unit determines whether or not the dehumidifying operation is possible, the controller 2 performs the dehumidifying operation using the dehumidifying operation determining unit. The operation is determined to be impossible, and the operation is continued in the operation mode determined by the operation mode determination means.
[0027]
After the operation mode determining means determines the operation mode, the dehumidifying operation determining means determines the dehumidifying operation, and after the dehumidifying operation is started, the temperature sensor 20 installed in the first coil 4 detects the occurrence of an abnormality in the first coil 4. If detected, the control device 2 determines that the dehumidifying operation cannot be continued by the dehumidifying operation determining means, stops the operation of the first coil, and determines the operation mode by applying the cooling / heating operation to the second coil 5. The operation is continued in the operation mode determined by the means.
[0028]
【The invention's effect】
In the outside air processing unit according to the present invention, when an abnormality occurs in the humidity sensor and an operation abnormality occurs in the first coil or the second coil, the control device does not switch to the dehumidifying operation or continues the dehumidifying operation. Since the operation is continued in the operation mode determined by the operation mode determining means, the thermal environment in the living room can be ensured at a minimum. Therefore, when the resident is absent for a long period of time, deterioration of articles such as clothes and furniture in the living room can be prevented.
[Brief description of the drawings]
FIG. 1 is a configuration block diagram of an outside air processing unit according to the present invention.
FIG. 2 is an automatic operation switching state determination MAP of an outside air processing unit according to the present invention.
[Explanation of symbols]
1 unit body, 2 control device, 3 total heat exchanger,
4 first coil, 5 second coil, 6 humidifier,
7 Exhaust fan, 8 Air supply fan, 9 Outside air temperature sensor,
10 room temperature sensor, 11 humidity sensor, 13 solenoid valve,
14 open air port, 15 exhaust port, 16 return air port,
17 Air supply port, 18 Bypass damper,
20 first coil surface temperature sensor;
21 a second coil surface temperature sensor;
25 1st ventilation path, 26 2nd ventilation path,
27 3rd ventilation path, 28 4th ventilation path,
29 Remote control,
30 Automatic operation / manual operation switch,

Claims

An outside air temperature sensor that detects outside air temperature, a humidity sensor that detects indoor humidity, a first coil that is installed in a ventilation path connected to the air supply port, and that heats or cools outside air, and a downstream side of the first coil The outside air temperature sensor includes a second coil that heats the air that has passed through the first coil, and a second temperature sensor that detects the surface temperature of the second coil. Operation mode determining means for determining either cooling operation or air blowing operation according to the value of the dehumidifying operation, and dehumidifying operation determining means for determining whether or not to perform the dehumidifying operation according to a predetermined reference value of the humidity sensor. and, said second coil during heating operation is not possible or heating is overheated to determine based on the value of the second temperature sensor of the occurrence of abnormality in said second coil, said humidity If the case is judged an occurrence of abnormality in the humidity sensor based on the value of the sensor or it is determined the occurrence of abnormal prior Symbol second coil, the dehumidifying operation determination means determines not to dehumidifying operation, the operating mode An outside air processing unit comprising means for continuing operation in accordance with the operation mode determined by the determining means.

An outside air temperature sensor that detects the outside air temperature, a humidity sensor that detects the room humidity, a first coil that is installed in a ventilation path connected to the air supply port, and heats or cools the outside air, and a surface temperature of the first coil A first temperature sensor that detects the temperature, a second coil that is installed downstream of the first coil and that heats or cools the air that has passed through the first coil, and a surface temperature of the second coil In the outside air processing unit having a second temperature sensor for detecting the air temperature, the operation mode determining means for determining any one of the cooling operation, the heating operation and the air blowing operation according to the value of the outside air temperature sensor, and the operation mode determining means If any of the cooling operation or air blowing operation is selected in has a dehumidifying operation determining means for determination of whether or not to perform dehumidifying operation by a predetermined reference value of the humidity sensor, the heating kinematic That the first temperature sensor is overheated or not heated, or that the first coil during cooling operation is overcooled or not cooled. It is determined based on the value that an abnormality has occurred in the first coil, the second coil during the heating operation is overheated or not heated, or the second coil during the cooling operation is Based on the value of the second temperature sensor, it is determined that it is supercooled or not cooled, and an abnormality occurs in the second coil, and an abnormality occurs in the humidity sensor based on the value of the humidity sensor. the dehumidifying operation determination means when it is determined will continue to operate in accordance with the determined operation mode of the operation mode determining means determines that no dehumidifying operation, the first carp Together with the dehumidifying operation determination means determines not to dehumidification operation in the case when it is judged an occurrence of abnormality in or it is judged an occurrence of an abnormality before Symbol second coil, said first coil or said second outside air processing units abnormalities in the coil is provided with a means to continue the operation according to the determined operation mode of the operation mode determining means stops the operation of the coils is determined to have occurred within the coil.