JP2658918B2 - Freezing prevention control method for hot water type air conditioner - Google Patents
Freezing prevention control method for hot water type air conditionerInfo
- Publication number
- JP2658918B2 JP2658918B2 JP6278575A JP27857594A JP2658918B2 JP 2658918 B2 JP2658918 B2 JP 2658918B2 JP 6278575 A JP6278575 A JP 6278575A JP 27857594 A JP27857594 A JP 27857594A JP 2658918 B2 JP2658918 B2 JP 2658918B2
- Authority
- JP
- Japan
- Prior art keywords
- hot water
- temperature
- heat exchanger
- freezing
- air conditioner
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Steam Or Hot-Water Central Heating Systems (AREA)
- Air Conditioning Control Device (AREA)
- Devices For Blowing Cold Air, Devices For Blowing Warm Air, And Means For Preventing Water Condensation In Air Conditioning Units (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は、冷媒を循環させる冷媒
循環回路と温水を循環させる温水循環回路とを備え、冷
房運転及び暖房運転に加えて除湿運転を行うことのでき
る温水式空気調和機の凍結防止制御方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water type air conditioner having a refrigerant circulation circuit for circulating a refrigerant and a hot water circulation circuit for circulating hot water and capable of performing a dehumidifying operation in addition to a cooling operation and a heating operation. The present invention relates to a freeze prevention control method.
【0002】[0002]
【従来の技術】一般に、温水を用いた温水式空気調和機
(所謂温水エアコン)は、圧縮機、室外熱交換器、膨張
装置及び蒸発器を有し、冷媒を循環させるヒートポンプ
式の冷媒循環回路と、熱源機、循環ポンプ、放熱器及び
温水弁を有する温水循環回路とを備えており、冷媒循環
回路の蒸発器と温水循環回路の放熱器とが室内機内に組
み込まれている。このような温水式空気調和機は、冷房
運転時には冷媒循環回路のみを運転し、暖房運転時には
温水循環回路のみを運転し、除湿運転時には冷媒循環回
路と温水循環回路とを同時に運転して室内温度及び湿度
の制御を行うものである。2. Description of the Related Art Generally, a hot water type air conditioner using hot water (a so-called hot water air conditioner) has a compressor, an outdoor heat exchanger, an expansion device and an evaporator, and a heat pump type refrigerant circulation circuit for circulating a refrigerant. And a hot water circulation circuit having a heat source unit, a circulation pump, a radiator, and a hot water valve. An evaporator of the refrigerant circulation circuit and a radiator of the hot water circulation circuit are incorporated in the indoor unit. Such a hot-water type air conditioner operates only the refrigerant circulation circuit during the cooling operation, operates only the hot water circulation circuit during the heating operation, and simultaneously operates the refrigerant circulation circuit and the hot water circulation circuit during the dehumidification operation to achieve the indoor temperature. And humidity.
【0003】従来の温水循環回路においては、冬季の深
夜等の低温時に、運転を停止した温水循環回路内の水の
凍結を防止する手段として、室内熱交換器側即ち放熱器
側において温水循環回路の室内熱交換器温度(放熱器温
度)を検出し、室内熱交換器温度が所定値以下に低下し
たことを確認して温水弁を開き、熱源機側が凍結防止運
転を開始した時に温水が温水循環回路内に流通できるよ
うにしていた。なお、熱源機側の凍結防止運転は、熱源
機内の温度または外気温度の低下、或いは温水配管温度
の低下を検出すると開始され、循環ポンプが運転を開始
し、熱源機において燃焼を開始して温水を送出するもの
である。また、室内熱交換器側と熱源機側との間に通信
手段を設けたものにおいては、温水弁の開動作とともに
熱源機側に対して作動開始要求の信号を送信して凍結防
止運転を開始する。In a conventional hot water circulation circuit, as a means for preventing freezing of water in the hot water circulation circuit whose operation has been stopped at a low temperature such as midnight in winter, a hot water circulation circuit on the indoor heat exchanger side, that is, on the radiator side. The temperature of the indoor heat exchanger (radiator temperature) is detected, and it is confirmed that the temperature of the indoor heat exchanger has dropped below a predetermined value. The hot water valve is opened. It was made possible to circulate in the circulation circuit. The anti-freezing operation on the heat source device side is started when the temperature inside the heat source device or the outside air temperature is reduced, or when the temperature of the hot water pipe is reduced, the circulating pump starts operating, the combustion starts in the heat source device, and the hot water Is sent. When the communication means is provided between the indoor heat exchanger and the heat source unit, the anti-freezing operation is started by transmitting an operation start request signal to the heat source unit together with the opening operation of the hot water valve. I do.
【0004】[0004]
【発明が解決しようとする課題】しかしながら、温水循
環回路と冷媒循環回路とを備えた上述の温水式空気調和
機においては、室内機内に温水循環回路の放熱器と冷媒
循環回路の蒸発器が一体化または隣接されているから、
負荷が小さく、風速が低設定の時などの冷房運転時に室
内熱交換器温度(放熱器温度)が所定値以下に低下する
ことがあり、上記従来の温水循環回路の凍結防止制御方
法では、凍結防止運転が開始され、温水弁が無用に開閉
されるという問題があった。そこで、暖房、冷房、除
湿、送風等の何れの運転においても、凍結防止機能をキ
ャンセルすることが行われているが、例えば、誤設定に
より冬季の夜間に冷房運転の入タイマー運転が開始され
たり、エアシャワー(送風、冷風)を切り忘れた時等、
室内温度が低いときに温水循環回路を停止する等の暖房
運転以外の運転が行われると、室内機内の温水配管、放
熱器等が凍結して放熱器のフィンパイプを破損する恐れ
があるという問題があった。尚、例えば特開平2−2136
36号公報に記載されたもののように、室内熱交換器温度
の他に室内温度を検出することが考えられるが、何らか
の運転が行われている時は室内ファンが作動しているか
ら、比較的精度良く室内温度を検出することができる
が、運転停止時には室内ファンが停止しているから、室
内温度の検出値が信頼性に欠け、不必要な凍結防止運転
を招く恐れがあった。これに対して、室内温度検出のた
めに、定期的に室内ファンを作動させることが考えられ
るが、これは使用者の意図しない不快な送風となるとと
もに、騒音、不経済などの問題があった。However, in the above-described hot water type air conditioner having the hot water circulation circuit and the refrigerant circulation circuit, the radiator of the hot water circulation circuit and the evaporator of the refrigerant circulation circuit are integrated in the indoor unit. Or adjoining,
In the cooling operation such as when the load is small and the wind speed is set low, the indoor heat exchanger temperature (radiator temperature) may drop below a predetermined value. There was a problem that the preventive operation was started and the hot water valve was opened and closed unnecessarily. Therefore, in any of the operations such as heating, cooling, dehumidification, and ventilation, the freeze prevention function is canceled.For example, an on-timer operation of the cooling operation may be started at night in winter due to an erroneous setting. , When you forget to turn off the air shower (blowing, cold air)
If an operation other than the heating operation such as stopping the hot water circulation circuit is performed when the indoor temperature is low, the hot water pipes and the radiator in the indoor unit may freeze and damage the fin pipe of the radiator. was there. Incidentally, for example, Japanese Patent Laid-Open No.
As described in Japanese Patent Publication No. 36, it is conceivable to detect the indoor temperature in addition to the indoor heat exchanger temperature, but when some operation is being performed, the indoor fan is operating, so that Although the indoor temperature can be detected with high accuracy, the indoor fan is stopped when the operation is stopped. Therefore, the detected value of the indoor temperature lacks reliability, and there is a possibility that unnecessary freezing prevention operation may be caused. On the other hand, it is conceivable to operate the indoor fan periodically to detect the indoor temperature. However, this results in unpleasant air blowing that is not intended by the user, and also has problems such as noise and uneconomics. .
【0005】本発明の目的は、温水循環回路と冷媒循環
回路を備えた温水式空気調和機において、不必要な凍結
防止運転を行うことなく、温水循環回路の凍結を確実に
防止できる温水式空気調和機の凍結防止制御方法を提供
することである。An object of the present invention is to provide a hot-water air conditioner having a hot-water circulation circuit and a refrigerant circulation circuit, which can reliably prevent freezing of the hot-water circulation circuit without performing unnecessary antifreezing operation. An object of the present invention is to provide a freeze prevention control method for a harmonic machine.
【0006】[0006]
【課題を解決するための手段】上記目的を達成するため
に本発明の温水式空気調和機の凍結防止制御方法は、冷
媒を循環させるヒートポンプ式の冷媒循環回路と、温水
循環回路とを備えた温水式空気調和機において、室内熱
交換器温度Th が予め設定された凍結防止制御開始温度
T0 以下で、且つ圧縮機が停止した後に予め定められた
設定時間t以上経過した場合に、温水弁を開いて凍結防
止運転を開始するものである。凍結防止運転中におい
て、室内熱交換器温度Th が凍結防止制御開始温度T0
より高い値に予め設定された凍結防止制御終了温度T1
以上となった時に、温水弁を閉じて凍結防止運転を終了
するものである。また、凍結防止運転中において、圧縮
機がオンした時に、温水弁を閉じて凍結防止運転を終了
するものである。According to one aspect of the present invention, there is provided a method for controlling the prevention of freezing of a hot water type air conditioner, comprising a heat pump type refrigerant circulation circuit for circulating a refrigerant, and a hot water circulation circuit. In the hot water type air conditioner, when the indoor heat exchanger temperature Th is equal to or lower than the preset freezing prevention control start temperature T 0 and the predetermined time t has elapsed after the compressor is stopped, the hot water valve Is opened to start the anti-freezing operation. During the anti-freezing operation, the indoor heat exchanger temperature Th becomes the anti-freezing control start temperature T 0.
Freezing prevention control end temperature T 1 preset to a higher value
At this point, the hot water valve is closed to end the antifreeze operation. Further, during the antifreeze operation, when the compressor is turned on, the hot water valve is closed to end the antifreeze operation.
【0007】[0007]
【作用】室内熱交換器温度Th が予め設定された凍結防
止制御開始温度T0 以下で、且つ圧縮機が停止した後に
予め定められた設定時間t以上経過した場合に、温水弁
を開いて凍結防止運転を開始することにより、温水式空
気調和機の現在の運転モードに関係なく、温水循環回
路、特に室内熱交換器に凍結の恐れがあるときは、確実
に凍結防止運転を開始することができる一方、凍結の恐
れがないときには不必要な凍結防止運転を行うことがな
いものである。凍結防止運転中において、室内熱交換器
温度Th が凍結防止制御開始温度T0より高い値に予め
設定された凍結防止制御終了温度T1 以上となった時
に、温水弁を閉じて凍結防止運転を終了することによ
り、、室内熱交換器温度Th が凍結防止制御終了温度T
1 (30℃)以上となると、温水循環回路の温水配管全体
(室内熱交換器を含む)の温度が十分に高くなってお
り、凍結の恐れがないことが確実になった時点で凍結防
止運転を終了させることができる。また、凍結防止運転
中において、圧縮機がオンした時に、温水弁を閉じて凍
結防止運転を終了することにより、室内温度Tr が冷房
設定温度以上になると冷媒循環回路の圧縮機がオンする
ように設定されているから、圧縮機がオンしている時に
は、室内熱交換器温度Th が凍結防止制御開始温度T0
以下になっても室内温度Tr が少なくとも冷房設定温度
以上であるから凍結の恐れのないことが確実になった時
点で凍結防止運転を終了させることができる。When the indoor heat exchanger temperature Th is equal to or lower than the preset freezing prevention control start temperature T 0 and the predetermined time t has elapsed after the compressor is stopped, the hot water valve is opened to freeze. By starting the preventive operation, regardless of the current operation mode of the hot water type air conditioner, it is possible to reliably start the antifreeze operation when there is a risk of freezing in the hot water circulation circuit, especially the indoor heat exchanger. On the other hand, when there is no fear of freezing, unnecessary freezing prevention operation is not performed. During the freeze prevention operation, when it becomes an indoor heat exchanger temperature Th freeze prevention control start temperature T 0 set in advance in the higher value it has been frozen prevention control end temperature above T 1, the freeze prevention operation by closing the hot water valve By ending, the indoor heat exchanger temperature Th becomes the freeze prevention control end temperature T.
When the temperature rises above 1 (30 ° C), the temperature of the entire hot water piping (including the indoor heat exchanger) of the hot water circulation circuit is sufficiently high, and when it is certain that there is no risk of freezing, the anti-freezing operation Can be terminated. Further, during the anti-freezing operation, when the compressor is turned on, the hot water valve is closed to end the anti-freezing operation, so that when the room temperature Tr becomes equal to or higher than the cooling set temperature, the compressor of the refrigerant circuit is turned on. Therefore, when the compressor is turned on, the indoor heat exchanger temperature Th becomes the freezing prevention control start temperature T 0.
Even in the following cases, the freezing prevention operation can be terminated when it is ensured that there is no possibility of freezing since the room temperature Tr is at least equal to or higher than the cooling set temperature.
【0008】[0008]
【実施例】本発明を適用する温水式空気調和機の一例と
して、エアシャワー付温水式空気調和機を図3を参照し
て説明する。エアシャワー付温水式空気調和機の室内機
1は、サニタリー空間の天井壁Wに埋め込まれて配設さ
れ、サニタリー空間の室内側面に吸気口2と、ルーバ4
とを備え、温風または冷風を吹き出す空調吹出口3、並
びに通常は格納凹所6に格納され、使用時に引き出され
るノズル5が設けられている。DESCRIPTION OF THE PREFERRED EMBODIMENTS As an example of a hot water type air conditioner to which the present invention is applied, a hot water type air conditioner with an air shower will be described with reference to FIG. An indoor unit 1 of a hot water type air conditioner with an air shower is embedded and disposed in a ceiling wall W of a sanitary space, and an intake port 2 and a louver 4 are provided on the indoor side surface of the sanitary space.
And an air-conditioning outlet 3 for blowing out hot air or cold air, and a nozzle 5 which is usually stored in a storage recess 6 and drawn out when used.
【0009】室内機1内は、スポット通気口15を有する
隔壁14により、吸気口2及び空調吹出口3を下面に有す
る空気調和機Aと、ノズル5を下面に有するエアシャワ
ーDとに分割されており、空気調和機Aには吸気口2の
内側にフィルタ21及び室内温度Tr を検出する室温サー
ミスタ22が設けられ、吸気口2から空調吹出口3までの
流路に、冷媒往復管路71で室外機(図示せず)に接続さ
れた冷房用室内熱交換器(蒸発器)7と、温水供給管に
温水流量を調整する温水弁80を備えた温水往復管路81
で、循環ポンプ(図示せず)及び温水熱源機(図示せ
ず)に接続された暖房用室内熱交換器(放熱器)8と、
室内ファン13とが順に配置され、冷房用室内熱交換器7
と暖房用室内熱交換器8とに接触して室内熱交換器温度
Te を検出する熱交換器温度検出サーミスタ9が設けら
れており、また空調吹出口3に配置されたルーバ4はオ
ートルーバモータ41にアーム42を介して連結されてい
る。The interior of the indoor unit 1 is divided by a partition 14 having a spot vent 15 into an air conditioner A having an intake port 2 and an air conditioning outlet 3 on a lower surface, and an air shower D having a nozzle 5 on a lower surface. In the air conditioner A, a filter 21 and a room temperature thermistor 22 for detecting the room temperature Tr are provided inside the intake port 2, and a refrigerant reciprocating line 71 is provided in a flow path from the intake port 2 to the air conditioning outlet 3. , An indoor heat exchanger (evaporator) 7 for cooling connected to an outdoor unit (not shown), and a hot water reciprocating pipeline 81 provided with a hot water valve 80 for adjusting a hot water flow rate in a hot water supply pipe.
A heating indoor heat exchanger (radiator) 8 connected to a circulation pump (not shown) and a hot water heat source device (not shown);
The indoor fans 13 are arranged in order, and the indoor heat exchanger 7 for cooling is used.
And a heat exchanger temperature detecting thermistor 9 for detecting the indoor heat exchanger temperature Te in contact with the indoor heat exchanger 8 for heating, and a louver 4 disposed at the air-conditioning outlet 3 is an auto louver motor. It is connected to 41 via an arm 42.
【0010】冷房用室内熱交換器7及び暖房用室内熱交
換器8の下方にドレンパン10が配設され、ドレンパン10
の側方にドレン溜101 が連続して設けられており、ドレ
ン溜101 には貯留されたドレンの液位を検出する検出電
極11及びドレンポンプ12が配設され、ドレンポンプ12の
吐出側に接続されたドレンパイプ121 は空気調和機本体
1外に導出されている。A drain pan 10 is provided below the indoor heat exchanger 7 for cooling and the indoor heat exchanger 8 for heating.
A drain reservoir 101 is continuously provided on the side of the drain reservoir 101, and a detection electrode 11 and a drain pump 12 for detecting the liquid level of the stored drain are disposed in the drain reservoir 101. The connected drain pipe 121 is led out of the air conditioner body 1.
【0011】空調運転時には、吸気口2から室内空気を
吸入し(矢印F1 )、冷房用室内熱交換器7により冷却
された冷風(冷房時)、或いは暖房用室内熱交換器8に
より加熱された温風(暖房時)を室内ファン13により空
調吹出口3からサニタリー空間に吹き出す(矢印F2 )
ものである。At the time of air-conditioning operation, indoor air is sucked from the intake port 2 (arrow F 1 ) and is cooled by the cooling air (at the time of cooling) by the indoor heat exchanger 7 or heated by the indoor heat exchanger 8 for heating. Hot air (during heating) is blown into the sanitary space from the air conditioning outlet 3 by the indoor fan 13 (arrow F 2 ).
Things.
【0012】エアシャワーDは、一端に吸気口にフィル
タ18を備えたエアシャワー用スポットファン17が設けら
れ、内部に温風用セラミックヒータ19、温度ヒューズ19
0 及び加熱防止スイッチ191 が設けられたエアシャワー
ケース16が設置され、エアシャワーケース16の他端にノ
ズル5がエアシャワーケース16に対する角度調整可能に
回動自在に連結されており、隔壁14のスポット通気口15
から冷房用室内熱交換器7及び暖房用室内熱交換器8の
下流側の空気を吸引してノズル5から送風するもので、
エアシャワーDの運転時には空調吹出口3から室内空気
が吸引される恐れがあるが、この時に室内ファン13を微
風運転にセットすることにより、室内空気の吸引を抑え
ることができる。The air shower D is provided with a spot fan 17 for air shower having a filter 18 at an intake port at one end, and a ceramic heater 19 for hot air and a thermal fuse 19 inside.
The air shower case 16 provided with the air shower case 16 and the heat prevention switch 191 is installed. The nozzle 5 is connected to the other end of the air shower case 16 so as to be rotatable so that the angle with respect to the air shower case 16 can be adjusted. Spot vent 15
Air from the downstream side of the indoor heat exchanger 7 for cooling and the indoor heat exchanger 8 for heating, and blown from the nozzle 5;
At the time of operation of the air shower D, there is a possibility that indoor air is sucked from the air-conditioning blow-out port 3. At this time, by setting the indoor fan 13 to the small wind operation, the suction of the indoor air can be suppressed.
【0013】ノズル5のエアシャワーケース16への連結
端は、回動軸50で支持され、モータ51により回動され、
ノズル5のエアシャワーケース16に対する角度が調節さ
れるもので、エアシャワーケース16に対する角度を検出
するノズル位置検出装置52が配置されている。A connection end of the nozzle 5 to the air shower case 16 is supported by a rotation shaft 50 and rotated by a motor 51.
The angle of the nozzle 5 with respect to the air shower case 16 is adjusted, and a nozzle position detection device 52 for detecting the angle with respect to the air shower case 16 is provided.
【0014】エアシャワーDは、必要に応じて温風また
は冷風を吹き出すことができるものであり、温風を吹き
出す運転時には、ノズル5のエアシャワーケース16に対
する角度を調節してノズル5をサニタリー空間に突出さ
せ、スポットファン17を運転してスポット送風を行う
(矢印F3 )ものであり、温風を必要とする時にはセラ
ミックヒータ19に通電してスポットファン17からの送風
を加熱して温風を送風するが、運転モードの強弱及び吸
気温度の高低等に応じて必要な時に温水調整弁80をオン
して空気調和機Aの暖房用室内熱交換器8を運転し、ス
ポットファン17の吸気温度を上昇させ、ノズル5から吹
き出される温風温度を十分に高くする(バックアップ運
転)。The air shower D can blow out hot air or cold air as required. During the operation of blowing out hot air, the angle of the nozzle 5 with respect to the air shower case 16 is adjusted to place the nozzle 5 in a sanitary space. And the spot fan 17 is operated to perform spot air blowing (arrow F 3 ). When hot air is required, the ceramic heater 19 is energized to heat the air blown from the spot fan 17 to generate hot air. The hot water regulating valve 80 is turned on, and the heating indoor heat exchanger 8 of the air conditioner A is operated when necessary according to the strength of the operation mode and the level of the intake air temperature. The temperature is raised to make the temperature of the hot air blown out from the nozzle 5 sufficiently high (backup operation).
【0015】一方、冷風を必要とする時には空気調和機
Aの冷房用室内熱交換器7を運転して得られる冷風をス
ポット通気口15からエアシャワーDに吸引し、スポット
ファン17によりノズル5から送風するものである。On the other hand, when cool air is required, the cool air obtained by operating the cooling indoor heat exchanger 7 of the air conditioner A is sucked into the air shower D from the spot ventilation port 15 and is discharged from the nozzle 5 by the spot fan 17. It blows.
【0016】図2を参照して制御システムを説明する
と、室内機1内に、熱交換器温度検出サーミスタ9と検
出電極11及び室温サーミスタ22がマイクロコンピュータ
30の入力側に接続され、それぞれ室内熱交換器温度Te
、ドレンの液位、室内温度Trが入力されるとともに、
外部からのリモートコントローラ37からの制御信号が入
力される。一方、マイクロコンピュータ30の出力側に
は、室内ファン13を駆動する室内ファン駆動回路31と、
温水弁80の開度を全閉状態を含めて調節する温水弁駆動
回路32と、温水循環回路の熱源機(循環ポンプを含む)
34を運転制御する熱源機駆動回路33と、冷媒循環回路の
室外機(圧縮機、室外ファン、膨張装置等で構成され
る)36を運転制御する室外機駆動回路35とが接続され
る。The control system will be described with reference to FIG. 2. In the indoor unit 1, a heat exchanger temperature detecting thermistor 9, a detecting electrode 11, and a room temperature thermistor 22 are provided by a microcomputer.
30 are connected to the input side, and the indoor heat exchanger temperature Te
, The liquid level of the drain and the room temperature Tr are input,
A control signal from an external remote controller 37 is input. On the other hand, on the output side of the microcomputer 30, an indoor fan drive circuit 31 for driving the indoor fan 13 is provided.
A hot water valve drive circuit 32 that adjusts the opening of the hot water valve 80 including the fully closed state, and a heat source device (including a circulation pump) of a hot water circulation circuit
A heat source unit drive circuit 33 for controlling the operation of the unit 34 and an outdoor unit drive circuit 35 for controlling the operation of an outdoor unit (composed of a compressor, an outdoor fan, an expansion device, etc.) 36 of the refrigerant circuit are connected.
【0017】図1のフローチャートを参照して本発明の
凍結防止制御方法を説明すると、熱交換器温度検出サー
ミスタ9により検出される室内熱交換器温度Th が予め
設定された凍結防止制御開始温度T0 (例えば、10℃)
以下であり、且つ圧縮機が停止した後に予め定められた
設定時間t(例えば、2時間)以上経過した場合に、温
水弁駆動回路32が温水弁80を開き、熱源機駆動回路33が
熱源機(循環ポンプを含む)34を起動させる即ち循環ポ
ンプをオンさせるとともに、熱源機の温水発生部の燃焼
をオンさせて凍結防止運転を開始する。ここで、凍結防
止制御開始温度T0 は冷房設定温度Ts より低い値(例
えば、10℃)に設定する。Referring to the flowchart of FIG. 1, the freeze prevention control method according to the present invention will be described. The indoor heat exchanger temperature Th detected by the heat exchanger temperature detection thermistor 9 is set to a predetermined freeze prevention control start temperature T. 0 (for example, 10 ° C)
If the predetermined time t (for example, 2 hours) has elapsed after the compressor stopped, the hot water valve drive circuit 32 opens the hot water valve 80, and the heat source device drive circuit 33 The circulating pump (including the circulating pump) is started, that is, the circulating pump is turned on, and at the same time, the combustion of the hot water generator of the heat source unit is turned on to start the antifreezing operation. Here, the anti-freezing control start temperature T 0 is set to a value (for example, 10 ° C.) lower than the cooling set temperature Ts.
【0018】なお、冷房運転並びに除湿運転において
は、室内温度Tr が冷房設定温度Ts(例えば、16℃)
以上になると冷媒循環回路の圧縮機がオンするように設
定されているから、圧縮機がオンしている時には、室内
熱交換器温度Th が凍結防止制御開始温度T0 (10℃)
以下になっても室内温度Tr が少なくとも冷房設定温度
Ts (16℃)以上であるから凍結の恐れは全くないもの
である(一般に、冷房設定温度を16℃程度に制限し、使
用者の健康を害する恐れも考えられるような低温には設
定できないようにしている)。In the cooling operation and the dehumidifying operation, the room temperature Tr is set to the cooling set temperature Ts (for example, 16 ° C.).
Since the compressor of the refrigerant circuit is turned on when the above is reached, when the compressor is on, the indoor heat exchanger temperature Th becomes the freezing prevention control start temperature T 0 (10 ° C.).
Even if the temperature falls below, there is no possibility of freezing because the indoor temperature Tr is at least equal to or higher than the cooling set temperature Ts (16 ° C.). It is not possible to set the temperature low enough to cause harm).
【0019】凍結防止運転中において、室内熱交換器温
度Th が凍結防止制御開始温度T0より高い値に予め定
められた凍結防止制御終了温度T1 (例えば、30℃)以
上となる、或いは冷媒循環回路の圧縮機がオンした時
に、熱源機34を停止させ、温水弁80を閉じて凍結防止運
転を終了する。これは、室内熱交換器温度Th が凍結防
止制御終了温度T1 (30℃)以上となると、温水循環回
路の温水配管全体(室内熱交換器を含む)の温度が十分
に高くなっており、凍結の恐れがないものである。ま
た、圧縮機がオンしたときは、上述の如く、室内温度T
r が少なくとも冷房設定温度Ts (16℃)以上であるか
ら凍結の恐れは全くないものである。During the anti-freezing operation, the indoor heat exchanger temperature Th becomes higher than a predetermined anti-freezing control end temperature T 1 (for example, 30 ° C.) higher than the anti-freezing control start temperature T 0 , or the refrigerant. When the compressor of the circulation circuit is turned on, the heat source unit 34 is stopped, the hot water valve 80 is closed, and the freezing prevention operation ends. This is because when the indoor heat exchanger temperature Th becomes higher than the freeze prevention control end temperature T 1 (30 ° C.) or more, the temperature of the entire hot water pipe (including the indoor heat exchanger) of the hot water circulation circuit becomes sufficiently high. There is no fear of freezing. When the compressor is turned on, as described above, the room temperature T
Since r is at least the cooling set temperature Ts (16 ° C.), there is no possibility of freezing.
【0020】この構成により、停止状態を含めて温水式
空気調和機の現在の運転モードに関係なく、温水循環回
路、特に室内熱交換器に凍結の恐れがあるときは、確実
に凍結防止運転を開始することができる一方、凍結の恐
れがないときには不必要な凍結防止運転を行うことがな
いものである。また、凍結する恐れのないことが確実に
なった時点で凍結防止運転を終了させることができる。With this configuration, regardless of the current operation mode of the hot water type air conditioner including the stop state, when the hot water circulation circuit, particularly the indoor heat exchanger, may be frozen, the antifreeze operation is reliably performed. While it can be started, unnecessary freezing prevention operation is not performed when there is no fear of freezing. Further, the freezing prevention operation can be terminated when it is ensured that there is no possibility of freezing.
【0021】[0021]
【発明の効果】本発明は、上述のとおり構成されている
から次に述べる効果を奏する。室内熱交換器温度Th が
予め設定された凍結防止制御開始温度T0 以下で、且つ
圧縮機が停止した後に予め定められた設定時間t以上経
過した場合に、温水弁を開いて凍結防止運転を開始する
ことにより、停止状態を含めて温水式空気調和機の現在
の運転モードに関係なく、温水循環回路、特に室内熱交
換器に凍結の恐れがあるときは、確実に凍結防止運転を
開始することができる一方、凍結の恐れがないときには
不必要な凍結防止運転を行うことがないものである。凍
結防止運転中において、室内熱交換器温度Th が凍結防
止制御開始温度T0より高い値に予め設定された凍結防
止制御終了温度T1 以上となった時に、温水弁を閉じて
凍結防止運転を終了することにより、室内熱交換器温度
Th が凍結防止制御終了温度T1 (30℃)以上となる
と、温水循環回路の温水配管全体(室内熱交換器を含
む)の温度が十分に高くなっており、凍結の恐れがない
ことが確実になった時点で凍結防止運転を終了させるこ
とができる。また、凍結防止運転中において、圧縮機が
オンした時に、温水弁を閉じて凍結防止運転を終了する
ことにより、室内温度Tr が冷房設定温度以上になると
冷媒循環回路の圧縮機がオンするように設定されている
から、圧縮機がオンしている時には、室内熱交換器温度
Th が凍結防止制御開始温度T0 以下になっても室内温
度Tr が少なくとも冷房設定温度以上であるから凍結の
恐れのないことが確実になった時点で凍結防止運転を終
了させることができる。Since the present invention is constructed as described above, it has the following effects. When the indoor heat exchanger temperature Th is equal to or less than the preset freezing prevention control start temperature T 0 and the predetermined time t or more has elapsed after the compressor stopped, the hot water valve is opened to perform the antifreezing operation. By starting, regardless of the current operation mode of the hot-water air conditioner including the stopped state, when there is a risk of freezing in the hot-water circulation circuit, particularly, the indoor heat exchanger, the anti-freezing operation is reliably started. On the other hand, when there is no fear of freezing, unnecessary antifreeze operation is not performed. During the freeze prevention operation, when it becomes an indoor heat exchanger temperature Th freeze prevention control start temperature T 0 set in advance in the higher value it has been frozen prevention control end temperature above T 1, the freeze prevention operation by closing the hot water valve When the indoor heat exchanger temperature Th becomes equal to or higher than the freeze prevention control end temperature T 1 (30 ° C.), the temperature of the entire hot water pipe (including the indoor heat exchanger) of the hot water circulation circuit becomes sufficiently high. Therefore, the freezing prevention operation can be terminated when it is ensured that there is no fear of freezing. Also, during the antifreeze operation, when the compressor is turned on, the hot water valve is closed to end the antifreeze operation, so that when the indoor temperature Tr becomes equal to or higher than the cooling set temperature, the compressor of the refrigerant circuit is turned on. Therefore, when the compressor is turned on, even if the indoor heat exchanger temperature Th falls below the freezing prevention control start temperature T 0, the indoor temperature Tr is at least equal to or higher than the cooling set temperature. The anti-freezing operation can be ended when it is ensured that no operation is performed.
【図1】 本発明の制御動作を示すフローチャートであ
る。FIG. 1 is a flowchart showing a control operation of the present invention.
【図2】 本発明に係る制御システムのブロック図であ
る。FIG. 2 is a block diagram of a control system according to the present invention.
【図3】 本発明を適用する温水式空気調和機の一例を
示す概略構成図である。FIG. 3 is a schematic configuration diagram illustrating an example of a hot-water type air conditioner to which the present invention is applied.
1 空気調和機本体、2 吸気口、3 空調吹出口 5 エアシャワー用ノズル、7 冷房用室内熱交換器
(蒸発器) 8 暖房用室内熱交換器(放熱器)、9 熱交換器温度
検出サーミスタ 13 室内ファン、22 室温サーミスタ、80 温水弁DESCRIPTION OF SYMBOLS 1 Air conditioner main body, 2 Inlet, 3 Air conditioning outlet 5 Air shower nozzle, 7 Cooling indoor heat exchanger (evaporator) 8 Heating indoor heat exchanger (radiator), 9 Heat exchanger temperature detection thermistor 13 indoor fan, 22 room temperature thermistor, 80 hot water valve
───────────────────────────────────────────────────── フロントページの続き (72)発明者 田内 康夫 兵庫県神戸市中央区明石町32番地 株式 会社ノーリツ内 (56)参考文献 特開 平5−44974(JP,A) 特開 平2−213636(JP,A) 特開 昭50−72239(JP,A) ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Yasuo Tauchi 32, Akashi-cho, Chuo-ku, Kobe-shi, Hyogo Noritsu Co., Ltd. (56) References JP-A-5-44974 (JP, A) JP-A-2-213636 (JP, A) JP-A-50-72239 (JP, A)
Claims (1)
循環回路と、温水循環回路とを備えた温水式空気調和機
において、室内熱交換器温度Thが予め設定された凍結
防止制御開始温度T0以下で、且つ圧縮機が停止した後
に予め定められた設定時間t以上経過した場合に、温水
弁を開いて凍結防止運転を開始し、凍結防止運転中にお
いて、圧縮機がオンした時に、温水弁を閉じて凍結防止
運転を終了することを特徴とする温水式空気調和機の凍
結防止制御方法。[1 claim: a refrigerant circuit of a heat pump for circulating the refrigerant in the hot water type air conditioner having a hot water circulation circuit, freezing prevention control start temperature T 0 below the indoor heat exchanger temperature Th is set in advance In the case where a predetermined time t or more has elapsed after the compressor stopped, the hot water valve is opened to start the antifreeze operation. During the antifreeze operation, when the compressor is turned on, the hot water valve is turned on. A freeze prevention control method for a hot-water type air conditioner, which is closed to end the freeze prevention operation.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6278575A JP2658918B2 (en) | 1994-10-19 | 1994-10-19 | Freezing prevention control method for hot water type air conditioner |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6278575A JP2658918B2 (en) | 1994-10-19 | 1994-10-19 | Freezing prevention control method for hot water type air conditioner |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH08121842A JPH08121842A (en) | 1996-05-17 |
JP2658918B2 true JP2658918B2 (en) | 1997-09-30 |
Family
ID=17599183
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6278575A Expired - Fee Related JP2658918B2 (en) | 1994-10-19 | 1994-10-19 | Freezing prevention control method for hot water type air conditioner |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2658918B2 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103277882A (en) * | 2013-06-27 | 2013-09-04 | 苏州市牛勿耳关电器科技有限公司 | Intelligent air conditioner |
CN108317687A (en) * | 2018-02-05 | 2018-07-24 | 珠海格力电器股份有限公司 | Anti-freezing energy-saving control method and device and air conditioning unit |
CN109458708B (en) * | 2018-10-31 | 2020-03-13 | 珠海格力电器股份有限公司 | Non-communication air conditioner, and operation mode judgment method and control method thereof |
CN109990519B (en) * | 2019-04-17 | 2020-12-22 | 南京天加环境科技有限公司 | Air source heat pump anti-freezing control method |
CN110017568B (en) * | 2019-04-18 | 2021-02-02 | 宁波奥克斯电气股份有限公司 | Fan coil anti-freezing control method and device and air conditioner |
CN112303818B (en) * | 2020-10-23 | 2021-10-29 | 珠海格力电器股份有限公司 | Defrosting control device and method of air conditioning system and air conditioning system |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2619024B2 (en) * | 1988-11-15 | 1997-06-11 | 株式会社東芝 | Air conditioner |
JP2535111B2 (en) * | 1991-08-19 | 1996-09-18 | リンナイ株式会社 | Air conditioner |
-
1994
- 1994-10-19 JP JP6278575A patent/JP2658918B2/en not_active Expired - Fee Related
Also Published As
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JPH08121842A (en) | 1996-05-17 |
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