JP2006149294A - Method and apparatus for controlling fog spraying in fog cooling apparatus - Google Patents
Method and apparatus for controlling fog spraying in fog cooling apparatus Download PDFInfo
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- JP2006149294A JP2006149294A JP2004345323A JP2004345323A JP2006149294A JP 2006149294 A JP2006149294 A JP 2006149294A JP 2004345323 A JP2004345323 A JP 2004345323A JP 2004345323 A JP2004345323 A JP 2004345323A JP 2006149294 A JP2006149294 A JP 2006149294A
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Abstract
Description
本発明は、園芸作物栽培施設や畜産の飼育施設（畜舎）などの高温対策のため冷房手段として導入されている細霧冷房装置における細霧噴霧の制御方法と制御装置とに関する。 The present invention relates to a fine fog spray control method and a control device in a fine fog cooling device introduced as a cooling means for high temperature countermeasures such as a horticultural crop cultivation facility and a livestock breeding facility (stock house).
細霧冷房装置は、ノズルから微細な霧を空中に噴霧して、水滴の蒸発に伴う気化潜熱により気温を低下させるもので、園芸作物の栽培施設や畜産の飼育施設（畜舎）などで広く利用されており、周年栽培における高温抑制対策の１つとして注目されている（図３参照）。園芸施設への設置面積は、現在1000haを越えて、養液栽培の普及面積に匹敵するほどになった。その多くは中小規模施設への導入で、噴霧制御として複合環境制御装置ではなく、タイマー式簡易コントローラを利用している。
しかしながら、噴霧時間と休止時間とを設定してサーモスタットと組合わせて動作させる、最も一般的なタイプのタイマー式簡易コントローラは、過湿状態に対応して噴霧を停止する機能がないため、天候の変化や施設の換気窓の開閉などの環境変化が起こると、過剰に噴霧してしまう危険性を伴う。このため、安全を見て、効果が小さい少量の噴霧設定にせざるを得ない、操作者が長時間噴霧装置から離れられない、頻繁な噴霧時間／休止時間の変更を行う必要がある、などといった問題がある。このため、各種施設や変化する気象条件に対して適切な噴霧時間を設定することは非常に困難で、頻繁な設定条件の変更を強いられている。
The fine mist cooling device sprays fine mist from the nozzles in the air and lowers the temperature by the latent heat of vaporization caused by evaporation of water droplets. It is widely used in horticultural crop cultivation facilities and livestock breeding facilities (livestock houses). It is attracting attention as one of the countermeasures for high temperature suppression in anniversary cultivation (see FIG. 3). The installation area for horticultural facilities now exceeds 1000 ha, and is comparable to the spread area of hydroponics. Many of them are introduced to small and medium-sized facilities, and use a simple timer-type controller for spray control instead of a complex environment control device.
However, the most common type of timer-type simple controller that operates in combination with a thermostat by setting the spray time and rest time does not have a function to stop spraying in response to an overhumid condition. When environmental changes such as changes or opening / closing of ventilation windows of facilities occur, there is a risk of excessive spraying. For this reason, for safety reasons, it is inevitable to use a small amount of spray setting that is less effective, the operator cannot leave the spray device for a long time, or it is necessary to change the spray time / pause time frequently, etc. There's a problem. For this reason, it is very difficult to set an appropriate spraying time for various facilities and changing weather conditions, and the setting conditions are frequently changed.
そこで、細霧の過剰噴霧を回避するために空気湿度（相対湿度）センサを利用して、設定湿度以下になると噴霧を停止するコントローラが提案され（例えば、特許文献１参照）、また市販されている。
しかしながら、このものは高価格である上に湿度センサが高湿度条件での精度が悪く、さらに、一旦水滴がセンサに付着するとそれが乾くまで測定不能になるので、通風式を採用しにくく、短時間で湿度が100%近くまで高くなる細霧冷房噴霧センサとしては、測定精度と応答性の両面から問題がある。さらに、長期間にわたるセンサ特性の持続についての信頼性が低く、厳密な高湿度条件で安定して噴霧を制御するには不充分である。
従って、利用者が望む噴霧状態を、長期間安定して自動運転で維持できる、安価な簡易コントローラ（制御装置）の開発が待たれている。
Therefore, a controller that uses an air humidity (relative humidity) sensor to stop spraying when the humidity falls below a set humidity is proposed to avoid excessive spraying of fine mist (see, for example, Patent Document 1) and is commercially available. Yes.
However, this is expensive and the humidity sensor has poor accuracy under high humidity conditions.In addition, once water droplets adhere to the sensor, it becomes impossible to measure until it dries. As a fine fog cooling spray sensor whose humidity increases to nearly 100% over time, there are problems in both measurement accuracy and responsiveness. Furthermore, the reliability of the sensor characteristics over a long period of time is low and it is insufficient to control the spray stably under strict high humidity conditions.
Therefore, development of an inexpensive simple controller (control device) that can stably maintain the spray state desired by the user for a long period of time by automatic operation is awaited.
本発明は、上記従来技術の問題点を解消し、園芸作物栽培施設や畜舎等の細霧冷房装置において、気象条件や施設の換気条件による蒸発要求量の変化に対応して自動的に噴霧量を調節し、長期間にわたり自動的に効果的な噴霧を安全に継続することのできる細霧冷房装置における細霧噴霧の制御方法と制御装置とを提供することを目的とするものである。 The present invention solves the above-mentioned problems of the prior art, and in a fine fog cooling device such as a horticultural crop cultivation facility or a livestock barn, the spray amount automatically corresponds to the change in evaporation requirement due to the weather conditions or the ventilation conditions of the facility. It is an object of the present invention to provide a fine mist spray control method and a control device in a fine mist cooling device that can safely and continuously continue effective spray over a long period of time.
本発明者は、上記従来の問題点を解消すべく鋭意研究を重ねた。その結果、過剰噴霧を回避して、噴霧の適否を判断するための指標として、気温（乾球温度）センサと自然湿球温度センサとの温度差を利用することにより、目的を達成しうることを見出した。
即ち、請求項１に係る本発明は、細霧冷房装置における細霧噴霧を制御するにあたり、気温センサと自然湿球温度センサとの温度差を利用して制御することを特徴とする細霧冷房装置における細霧噴霧の制御方法を提供するものである。
請求項２に係る本発明は、気温を測定する気温センサと、細霧噴霧の運転時間を設定する噴霧設定タイマと、細霧噴霧の休止時間を設定する噴霧休止タイマと、前記気温センサの測定値に基づき細霧噴霧の運転開始及び運転中止の指令を発すると共に前記噴霧設定タイマと前記噴霧休止タイマの入力値に基づき噴霧の運転と休止を交互に制御する制御手段と、を備えた細霧冷房装置における細霧噴霧を制御するにあたり、更に自然湿球温度を測定する自然湿球温度センサを設け、気温と自然湿球温度との温度差が所定値以下となったときに前記制御手段により細霧噴霧を休止させるようにしたことを特徴とする細霧冷房装置における細霧噴霧の制御方法を提供するものである。
請求項３に係る本発明は、気温センサと自然湿球温度センサとの温度差を利用した制御手段を備えたことを特徴とする細霧冷房装置における細霧噴霧の制御装置を提供するものである。
請求項４に係る本発明は、気温を測定する気温センサと、細霧噴霧の運転時間を設定する噴霧設定タイマと、細霧噴霧の休止時間を設定する噴霧休止タイマと、前記気温センサの測定値に基づき細霧噴霧の運転開始及び運転中止の指令を発すると共に前記噴霧設定タイマと前記噴霧休止タイマの入力値に基づき噴霧の運転と休止を交互に制御する制御手段と、を備えた細霧冷房装置における細霧噴霧の制御装置において、更に自然湿球温度を測定する自然湿球温度センサを備え、前記制御手段により、前記気温センサの測定値と、前記自然湿球温度センサの測定値との差が所定値以下となったときに前記制御手段により細霧噴霧を休止するようにされていることを特徴とする細霧冷房装置における細霧噴霧の制御装置を提供するものである。
The present inventor has intensively studied to solve the above conventional problems. As a result, it is possible to achieve the objective by using the temperature difference between the air temperature (dry bulb temperature) sensor and the natural wet bulb temperature sensor as an index for judging the propriety of the spray by avoiding excessive spraying. I found.
That is, according to the first aspect of the present invention, when controlling the fine fog spray in the fine fog cooling device, the fine fog cooling is performed by utilizing the temperature difference between the air temperature sensor and the natural wet bulb temperature sensor. Provided is a method for controlling fine mist spraying in an apparatus.
According to a second aspect of the present invention, there is provided an air temperature sensor for measuring the air temperature, a spray setting timer for setting the operation time of the fine fog spray, a spray pause timer for setting the pause time of the fine fog spray, and measurement of the temperature sensor. A fine mist comprising a control means for issuing a command to start and stop the operation of the fine mist spray based on the value and to alternately control the operation and the suspend of the spray based on the input values of the spray setting timer and the spray pause timer In controlling the fine spray in the cooling device, a natural wet bulb temperature sensor for measuring the natural wet bulb temperature is further provided, and when the temperature difference between the air temperature and the natural wet bulb temperature becomes a predetermined value or less, the control means The present invention provides a control method for fine fog spraying in a fine fog cooling device characterized in that the fine fog spray is suspended.
According to a third aspect of the present invention, there is provided a fine mist spray control device in a fine mist cooling device, comprising control means using a temperature difference between an air temperature sensor and a natural wet bulb temperature sensor. is there.
According to a fourth aspect of the present invention, there is provided an air temperature sensor for measuring the air temperature, a spray setting timer for setting the operation time of the fine fog spray, a spray pause timer for setting the pause time of the fine fog spray, and measurement of the temperature sensor. A fine mist comprising a control means for issuing a command to start and stop the operation of the fine mist spray based on the value and to alternately control the operation and the suspend of the spray based on the input values of the spray setting timer and the spray pause timer The fine mist spray control device in the air conditioner further includes a natural wet bulb temperature sensor for measuring a natural wet bulb temperature, and the control means includes a measured value of the temperature sensor, a measured value of the natural wet bulb temperature sensor, The fine mist spray control device is provided in the fine mist cooling device, wherein the fine mist spray is stopped by the control means when the difference between the two becomes a predetermined value or less.
本発明の制御方法と装置によれば、気温センサと自然湿球温度センサとの温度差を利用して細霧噴霧を制御していることから、高温期の園芸栽培施設や畜舎等の細霧冷房を長期間設定値の変化なしに、効果的に安定して自動噴霧することができる。広く普及しているサーモスタットとタイマーによる制御では、常に過剰噴霧の心配を伴うが、本発明の制御方法と装置の導入により、噴霧時間の設定変更の気配りや労力がなくなる。また、夜間の噴霧は一般に危険なために実施されないが、精度の高い噴霧制御により、夜間噴霧も可能である。
本発明の制御方法と装置により、細霧噴霧が自動で効果的に安定して運転できるようになると、施設園芸作物の作期延長や、高温障害の軽減などに効果がある。また、畜舎では、気象条件や窓などの環境条件の変化に対しても適切な家畜身体への霧付着量を維持することができ、生産量の向上に貢献できると考えられる。
即ち、本発明の制御方法と装置によれば、気象環境や施設の換気条件が変化しても、過剰な噴霧が起こらず、精度の高い安定した自動噴霧を行うことができる。
本発明の手法は、全ての細霧冷房装置のコントローラ部に導入することができる。
According to the control method and apparatus of the present invention, the fine mist spray is controlled using the temperature difference between the air temperature sensor and the natural wet bulb temperature sensor. Cooling can be effectively and automatically sprayed for a long time without changing the set value for a long time. The widely used thermostat and timer control always involves the concern of excessive spraying, but the introduction of the control method and apparatus of the present invention eliminates the attention and labor of changing the spray time setting. Moreover, although nighttime spraying is generally not performed because it is dangerous, nighttime spraying is also possible by highly accurate spray control.
When the fine mist spray can be automatically and effectively operated stably by the control method and apparatus of the present invention, it is effective in extending the cropping season of the facility horticultural crops, reducing the high temperature damage, and the like. Moreover, in a livestock barn, it is possible to maintain an appropriate amount of mist on the livestock body even with changes in environmental conditions such as weather conditions and windows, and it is thought that it can contribute to an improvement in production.
That is, according to the control method and apparatus of the present invention, even if the weather environment or the ventilation condition of the facility changes, excessive spray does not occur, and highly accurate and stable automatic spray can be performed.
The method of the present invention can be introduced into the controller unit of all fine fog cooling devices.
請求項１に係る本発明は、細霧冷房装置における細霧噴霧の制御方法に関し、細霧冷房装置における細霧噴霧を制御するにあたり、気温センサと自然湿球温度センサとの温度差を利用して制御することを特徴とするものである。
換言すると、請求項１に係る本発明は、細霧冷房装置における細霧噴霧の制御方法に関し、細霧冷房装置における細霧噴霧の運転／休止条件を決定する際に、気温センサと自然湿球温度センサとの温度差を利用する点に特色を有するものであって、様々な制御の仕方（制御方法）に用いることができる。
具体的には例えば気温センサと自然湿球温度センサとの温度差が所定値以上になると細霧噴霧を運転させて所定値以下となったときに休止させる機能をもつ制御方法、或いは、細霧噴霧運転時間について、噴霧動作時間と噴霧休止時間の設定により交互に噴霧動作と休止を繰り返す噴霧制御法において、気温センサと自然湿球温度センサとの温度差に応じて、その温度差が大きいときに噴霧動作時間を長くし、前記温度差が小さいときに噴霧動作時間を短くする機能を持つ制御方法などが挙げられる。
特に、気温と自然湿球温度との温度差が所定値以下となったときに細霧噴霧を休止させるようにした制御方法が挙げられる。
The present invention according to claim 1 relates to a method for controlling the fine fog spray in the fine fog cooling device, and uses the temperature difference between the air temperature sensor and the natural wet bulb temperature sensor to control the fine fog spray in the fine fog cooling device. It is characterized by controlling.
In other words, the present invention according to claim 1 relates to a method for controlling fine spray in the fine fog cooling device, and when determining the operation / pause conditions of fine spray in the fine fog cooling device, the temperature sensor and the natural wet bulb It is unique in that it uses the temperature difference with the temperature sensor, and can be used in various control methods (control methods).
Specifically, for example, when the temperature difference between the air temperature sensor and the natural wet bulb temperature sensor exceeds a predetermined value, the control method has a function of operating the fine mist spray and suspending when the temperature difference falls below the predetermined value, or the fine mist Regarding spray operation time, when the temperature difference between the air temperature sensor and the natural wet bulb temperature sensor is large in the spray control method that repeats the spray operation and the stop alternately by setting the spray operation time and the spray stop time. And a control method having a function of shortening the spraying operation time when the temperature difference is small.
In particular, there is a control method in which the fine mist spray is stopped when the temperature difference between the air temperature and the natural wet bulb temperature becomes a predetermined value or less.
請求項１に係る本発明においては過剰噴霧を回避して、噴霧間隔を自動調節するための指標として、気温と自然湿球温度との温度差を利用する。
このような請求項１に係る本発明の制御方法は、詳しくは請求項２に係る本発明の方法により行われる。
即ち、請求項２に係る本発明は、細霧冷房装置における細霧噴霧の制御方法に関し、気温を測定する気温センサと、細霧噴霧の運転時間を設定する噴霧設定タイマと、細霧噴霧の休止時間を設定する噴霧休止タイマと、前記気温センサの測定値に基づき細霧噴霧の運転開始及び運転中止の指令を発すると共に前記噴霧設定タイマと前記噴霧休止タイマの入力値に基づき噴霧の運転と休止を交互に制御する制御手段と、を備えた細霧冷房装置における細霧噴霧を制御するにあたり、更に自然湿球温度を測定する自然湿球温度センサを設け、気温と自然湿球温度との温度差が所定値以下となったときに前記制御手段により細霧噴霧を休止させるようにしたことを特徴とするものである。
In the present invention according to claim 1, the temperature difference between the air temperature and the natural wet bulb temperature is used as an index for automatically adjusting the spray interval while avoiding excessive spraying.
Specifically, the control method of the present invention according to claim 1 is performed by the method of the present invention according to claim 2.
That is, the present invention according to claim 2 relates to a method for controlling fine mist spray in the fine mist cooling device, an air temperature sensor for measuring the temperature, a spray setting timer for setting the operation time of fine mist spray, A spray stop timer for setting a stop time, a command for starting and stopping the operation of fine fog spray based on the measured value of the temperature sensor, and a spray operation based on input values of the spray setting timer and the spray stop timer In order to control the fine spray in the fine fog cooling device provided with a control means for alternately controlling the pause, a natural wet bulb temperature sensor for measuring the natural wet bulb temperature is further provided, and the air temperature and the natural wet bulb temperature are controlled. The fine mist spray is stopped by the control means when the temperature difference becomes a predetermined value or less.
また、請求項１に係る本発明の制御方法は、請求項３に係る本発明の制御装置により好適に実施することができる。
即ち、請求項３に係る本発明は、細霧冷房装置における細霧噴霧の制御装置に関し、気温センサと自然湿球温度センサとの温度差を利用した制御手段を備えたことを特徴とするものである。
換言すると、請求項３に係る本発明の制御装置は、細霧冷房装置における細霧噴霧の運転／休止条件を決定する際に、気温センサと自然湿球温度センサとの温度差を利用した制御装置であって、「気温センサと自然湿球センサの温度差」を運転／休止の判断に利用したものであれば、全ての制御装置に適用することができる。
このような請求項３に係る本発明の制御装置は、詳しくは請求項４に記載した如きものであり、請求項４に係る本発明の制御装置によれば、上記した請求項２に係る本発明の方法を好適に実施することができる。
従って、以下、請求項４に係る本発明の制御装置を参照しつつ、請求項３に係る本発明の制御装置、並びに請求項１、２に係る本発明の制御方法について説明する。
Moreover, the control method of the present invention according to claim 1 can be suitably implemented by the control device of the present invention according to claim 3.
That is, the present invention according to claim 3 relates to a control device for fine mist spraying in a fine mist cooling device, characterized by comprising control means using a temperature difference between an air temperature sensor and a natural wet bulb temperature sensor. It is.
In other words, the control device of the present invention according to claim 3 uses the temperature difference between the air temperature sensor and the natural wet bulb temperature sensor when determining the operation / pause condition of the fine fog spray in the fine fog cooling device. Any device that uses the “temperature difference between the air temperature sensor and the natural wet bulb sensor” for determination of operation / pause can be applied to all control devices.
The control device according to the third aspect of the present invention is as described in detail in the fourth aspect. According to the control device according to the fourth aspect, the control device according to the second aspect described above is provided. The method of the invention can be suitably carried out.
Accordingly, the control device of the present invention according to claim 3 and the control method of the present invention according to claims 1 and 2 will be described below with reference to the control device of the present invention according to claim 4.
図１は、請求項４に係る本発明を適用した制御装置の構成例の略図である。図中、符号１は気温を測定する気温センサ（乾球温度センサ）、符号２は細霧噴霧の運転時間を設定する噴霧設定タイマ、符号３は細霧噴霧の休止時間を設定する噴霧休止タイマである。噴霧設定タイマ２は、細霧噴霧の運転時間を任意に設定することができる。噴霧休止タイマ４は、細霧噴霧の休止時間を任意に設定することができる。
符号４は制御手段であり、制御手段４は、前記気温センサ１の測定値に基づき細霧噴霧の運転開始及び運転中止の指令を発すると共に前記噴霧設定タイマ２と前記噴霧休止タイマ３の入力値に基づき噴霧の運転と休止を交互に制御する。
請求項４に係る本発明の制御装置は、このような気温センサ１と、噴霧設定タイマ２と、噴霧休止タイマ３と、制御手段４と、を備えた細霧冷房装置における細霧噴霧の制御装置において、更に自然湿球温度を測定する自然湿球温度センサ５を備えたものである。
なお、気温センサ１、細霧噴霧の運転時間を設定する噴霧設定タイマ２、細霧噴霧の休止時間を設定する噴霧休止タイマ３、制御手段４は、公知のものを用いることができる。
FIG. 1 is a schematic diagram of a configuration example of a control device to which the present invention according to claim 4 is applied. In the figure, reference numeral 1 is an air temperature sensor (dry bulb temperature sensor) for measuring the temperature, reference numeral 2 is a spray setting timer for setting the operation time of the fine fog spray, and reference numeral 3 is a spray pause timer for setting the pause time of the fine fog spray. It is. The spray setting timer 2 can arbitrarily set the operation time of the fine fog spray. The spray pause timer 4 can arbitrarily set the pause time of the fine fog spray.
Reference numeral 4 denotes a control means. The control means 4 issues an instruction to start and stop the operation of the fine mist spray based on the measured value of the temperature sensor 1 and input values of the spray setting timer 2 and the spray pause timer 3. Based on the above, spraying operation and pause are controlled alternately.
The control device of the present invention according to claim 4 controls fine mist spraying in a fine mist cooling device comprising such an air temperature sensor 1, a spray setting timer 2, a spray pause timer 3, and a control means 4. The apparatus further includes a natural wet bulb temperature sensor 5 for measuring the natural wet bulb temperature.
As the temperature sensor 1, the spray setting timer 2 for setting the operation time of the fine fog spray, the spray pause timer 3 for setting the pause time of the fine fog spray, and the control means 4 can be used.
自然湿球温度センサ５は、自然湿球温度を測定するセンサである。
ここで自然湿球温度（Twn）とは、温度測定部を湿らせたガーゼ等で包んだ湿球を、空気中にそのままさらしたときの温度指示値である。換言すると、ＪＩＳ Ｚ８５０４に示されているとおり、自然湿球温度は、自然な対流中で、即ち強制通風することなく環境に置かれた濡れたガーゼで覆った温度センサーによって示す値をいう。この自然湿球温度は、通風乾湿計によって測定される湿球温度とは異なるものである。
これは、気温と空気湿度が同じでも、気流速度や日射の影響を受けて大きく変化し、自然状態の物体からの蒸発量とよく対応している。
The natural wet bulb temperature sensor 5 is a sensor that measures the natural wet bulb temperature.
Here, the natural wet bulb temperature (Twn) is a temperature indication value when a wet bulb wrapped with gauze or the like moistened with a temperature measuring unit is exposed to the air as it is. In other words, as shown in JIS Z8504, the natural wet bulb temperature refers to a value indicated by a temperature sensor covered with wet gauze placed in the environment in natural convection, that is, without forced draft. This natural wet-bulb temperature is different from the wet-bulb temperature measured by the ventilation / dryness meter.
Even if the air temperature and the air humidity are the same, it changes greatly under the influence of the air velocity and solar radiation, and corresponds well with the amount of evaporation from a natural object.
ＪＩＳ Ｚ８５０４によれば、自然湿球温度センサは次の特性を持つものと規定されている。
a)センサの受感部の形状：円筒形
b)センサの受感部の外径：６ｍｍ±１ｍｍ
c)センサの長さ：３０ｍｍ±５ｍｍ
d)測定範囲：５〜４０℃
e)測定精度：±０．５℃
f)センサの受感部全体は白いガーゼのような吸水性の高い素材（例えば、綿）によって覆う。
g)センサの支持部は、６ｍｍに等しい直径にし、かつ、センサの支持部からの熱伝導を減少させるために２０ｍｍのガーゼで覆う。
h)そのガーゼは、覆いがきつ過ぎたり緩過ぎたりすると精密な測定に支障をきたすので、筒状に編み、センサーの周りにきちんと覆いかぶせる。
i)ガーゼは、清潔に保つ。
j)ガーゼの下部は、水つぼ（壷）の蒸留水に浸す。空気中にある部分の長さは２０〜３０ｍｍとする。
k)水つぼは、周囲の環境の熱放射によって水温が上がらないような設計にする。
According to JIS Z8504, the natural wet bulb temperature sensor is defined as having the following characteristics.
a) Sensor sensing area: cylindrical
b) Outer diameter of sensor sensing part: 6mm ± 1mm
c) Sensor length: 30mm ± 5mm
d) Measurement range: 5-40 ° C
e) Measurement accuracy: ± 0.5 ° C
f) The entire sensor sensitive part is covered with a highly water-absorbing material such as white gauze (eg cotton).
g) The sensor support is of a diameter equal to 6 mm and covered with 20 mm gauze to reduce heat transfer from the sensor support.
h) If the gauze is too tight or too loose, it will interfere with precise measurement, so knitting it in a cylindrical shape and covering it tightly around the sensor.
i) Keep the gauze clean.
j) The lower part of the gauze is immersed in distilled water in a water pot. The length of the part in the air is 20-30 mm.
k) The water pot should be designed so that the water temperature does not rise due to the thermal radiation of the surrounding environment.
このような自然湿球温度センサは市販されていないので、基本的には自作する必要があるが、温度センサを湿ったガーゼ等で常時湿らせるだけであるので、例えばＪＩＳ Ｚ８５０４の労働環境の暑熱環境の評価に規定されているものに準じて簡単に製作することが可能である。自然湿球センサの形状としては、ＪＩＳ Ｚ８５０４のＷＢＧＴ（湿球黒球温度）の測定法の中に規定されているものを用いるとよいが、多少形状が異なっても細霧冷房の噴霧制御のために利用するには問題はない。
本発明の制御装置は、自然湿球温度センサを自作する必要があるが、市販の温度指示調節計、タイマーコントローラを組合わせて構成することができ、安価で安心して自動運転することができることから、特に中小規模の施設に導入された細霧冷房装置の制御法として有効に用いることができる。
また、湿球のための水補給は、よく利用される通風乾湿計（乾湿球温度計）の湿球と比較すると、通風乾湿計の湿球は蒸発速度が大きいので水切れが起こりやすいが、自然湿球温度では蒸発速度が通常、１／２以下で水切れしにくく、水のタンクの容量が小さく、メンテナンスの手間も軽減する。また、センサが常に露出しているので、湿り具合や汚れを簡単に確認することができる。
なお、自然湿球は常に濡れておくように管理が必要である。水タンクの枯渇やガーゼの汚れによる自然湿球の濡れの不具合が発生することがあるが、この場合でも、気温−自然湿球温度差が０になって噴霧の停止条件になるため、過剰噴霧にはならず安全である。
Since such a natural wet bulb temperature sensor is not commercially available, it is basically necessary to make it by itself. However, since the temperature sensor is only constantly moistened with wet gauze or the like, for example, the heat in the working environment of JIS Z8504 It is possible to manufacture easily according to what is prescribed in environmental assessment. As the shape of the natural wet bulb sensor, one specified in the WBGT (wet bulb black bulb temperature) measurement method of JIS Z8504 may be used. There is no problem to use for.
Although the control device of the present invention needs to make a natural wet bulb temperature sensor by itself, it can be configured by combining a commercially available temperature indicating controller and a timer controller, and can be automatically operated at low cost with confidence. In particular, it can be effectively used as a control method for a fine fog cooling device introduced in a small and medium-sized facility.
In addition, the water supply for wet bulbs is more likely to cause water breakage because the evaporation bulb has a higher evaporation rate compared to the wet bulbs of the commonly used ventilation / dryness meter (wet / dry bulb thermometer). At the wet bulb temperature, the evaporation rate is usually 1/2 or less, and it is difficult for water to run out, the capacity of the water tank is small, and maintenance work is reduced. Further, since the sensor is always exposed, it is possible to easily check the wetness and dirt.
In addition, it is necessary to manage natural wet bulbs so that they are always wet. Although there may be a problem of natural wet bulb wetting due to water tank depletion or gauze contamination, even in this case, the temperature-natural wet bulb temperature difference becomes 0 and the spray stop condition is reached. It ’s safe.
本発明では、噴霧制御のための指標として、空気湿度（相対湿度、湿球温度、露点など）ではなく、上記したような自然湿球温度という簡単な測定項目を用いる点が特徴である。自然湿球温度は、高湿度条件での測定精度が高く、安定した短時間の制御が可能であり、空気湿度ではなく物体からの蒸発要求量により密接に対応している指標であるので、気温−自然湿球温度差に基づいての噴霧を制御すると、物体への不必要な水滴付着を軽減することができる。即ち、細霧の過剰噴霧による濡れを抑制することができる。また、本発明の制御法は、園芸ハウス内で人間が作業をする時に不必要な濡れが軽減されるので、作業快適性の維持に有効と考えられる。 The present invention is characterized in that, as an index for spray control, not the air humidity (relative humidity, wet bulb temperature, dew point, etc.) but simple measurement items such as the natural wet bulb temperature as described above are used. The natural wet bulb temperature has high measurement accuracy under high humidity conditions, can be controlled stably for a short time, and is an index that more closely corresponds to the amount of evaporation required from an object rather than air humidity. -Controlling the spraying based on the natural wet bulb temperature difference can reduce unnecessary water droplet adhesion to the object. That is, wetting due to excessive spraying of fine mist can be suppressed. Further, the control method of the present invention is considered to be effective for maintaining work comfort because unnecessary wetting is reduced when a person works in the garden house.
請求項４に係る本発明の制御装置は、上記したような気温センサ１と、噴霧設定タイマ２と、噴霧休止タイマ３と、制御手段４と、を備えた細霧冷房装置における細霧噴霧の制御装置において、更に自然湿球温度を測定する自然湿球温度センサ５を備えたものであり、このような制御手段により、前記気温センサ１の測定値と、前記自然湿球温度センサ５の測定値との差が所定値以下となったときに前記制御手段４により細霧噴霧を休止するようにされていることを特徴とするものである。 According to a fourth aspect of the present invention, there is provided a control device according to a fourth aspect of the present invention, comprising: a temperature sensor 1; a spray setting timer 2; a spray pause timer 3; The control apparatus further includes a natural wet bulb temperature sensor 5 for measuring the natural wet bulb temperature. By such control means, the measured value of the air temperature sensor 1 and the measurement of the natural wet bulb temperature sensor 5 are measured. The fine mist spraying is stopped by the control means 4 when the difference from the value becomes a predetermined value or less.
図２は、このような請求項４に係る本発明を適用した制御装置を用いての細霧噴霧制御のフローの例を示す図である。このフロー図を参照しつつ説明する。なお、図３は細霧冷房装置を園芸作物の栽培施設に設置し噴霧している状態を示す説明図であり、符号Ａは細霧噴霧ノズルである。 FIG. 2 is a diagram showing an example of a flow of fine mist spray control using a control device to which the present invention according to claim 4 is applied. This will be described with reference to this flowchart. In addition, FIG. 3 is explanatory drawing which shows the state which has installed the fine fog cooling apparatus in the cultivation facility of horticultural crops, and is spraying, and the code | symbol A is a fine fog spray nozzle.
まず設定値を入力する。
即ち、予め噴霧設定タイマ２と噴霧休止タイマ３とを用いて、細霧を噴霧するときの最大連続噴霧時間（Tspray）と最大休止時間（Tsleep）を設定しておく（例えば、噴霧１２秒、休止４８秒）と共に、噴霧開始温度（Td0）（例えば２７℃）を設定しておく。さらに、気温と自然湿球温度との温度差（ΔTwn0）が所定値（例えば２．５℃）以下となったときに制御手段４により細霧噴霧を休止（以下、停止と言うことがある。）させるように設定しておく。
First, input a set value.
That is, the maximum continuous spray time (Tspray) and the maximum pause time (Tsleep) when spraying a fine mist are set in advance using the spray setting timer 2 and the spray pause timer 3 (for example, spray 12 seconds, A spray start temperature (Td0) (for example, 27 ° C.) is set together with the rest of 48 seconds. Further, when the temperature difference (ΔTwn0) between the air temperature and the natural wet bulb temperature becomes equal to or less than a predetermined value (for example, 2.5 ° C.), the fine mist spray may be stopped (hereinafter referred to as stop) by the control means 4. ).
次に、現在値の測定を行う。
即ち、上記したように事前の準備をしていた上で、まず気温センサ１で気温（Td）を測定する。さらに、自然湿球温度センサ５で自然湿球温度を測定し、気温−自然湿球温度差（ΔTwn）を求める。
そして、予め設定しておいた噴霧開始温度（Td0）よりも気温センサ１の測定値（Td）の方が高い場合、制御手段４により細霧噴霧の運転開始の指令が発せられ、細霧噴霧が開始される。この反対に、予め設定しておいた噴霧開始温度（Td0）よりもこの気温センサ１の測定値（Td）の方が低い場合には、細霧噴霧が開始されることはない。
細霧噴霧が開始されると、制御手段４により、噴霧設定タイマ２で設定された最大連続噴霧時間（Tspray）だけ噴霧が行われ、次いで噴霧休止タイマ３で設定された最大休止時間（Tsleep）だけ噴霧が休止され、以後、この噴霧と休止を交互に繰り返す。
Next, the current value is measured.
That is, after preparing in advance as described above, the temperature (Td) is first measured by the temperature sensor 1. Further, the natural wet bulb temperature sensor 5 measures the natural wet bulb temperature, and obtains the temperature-natural wet bulb temperature difference (ΔTwn).
If the measured value (Td) of the air temperature sensor 1 is higher than the spray start temperature (Td0) set in advance, the control means 4 issues a command to start the operation of fine mist spray, and the fine mist spray. Is started. On the other hand, when the measured value (Td) of the air temperature sensor 1 is lower than the preset spray start temperature (Td0), the fine mist spray is not started.
When the fine mist spray is started, the control means 4 performs the spray for the maximum continuous spray time (Tspray) set by the spray setting timer 2 and then the maximum sleep time (Tsleep) set by the spray pause timer 3. The spraying is paused for only this time, and thereafter this spraying and pause are repeated alternately.
本発明は、このような細霧の噴霧対象時間において、所定時間だけ噴霧と休止を交互に繰り返しているときに、気温と自然湿球温度との差（ΔTwn）を監視し、それらの差が設定値以下になると噴霧を停止する制御方法とするものである。換言すると、測定した気温と自然湿球温度との差（ΔTwn）が、予め設定していた［気温と自然湿球温度との温度差］（ΔTwn0）と同じか、或いはこれよりも大きかった場合には、噴霧条件成立として噴霧を続けるが、小さかった場合には噴霧条件不成立として噴霧を停止するものである。噴霧条件成立時には、予め設定した最大連続噴霧時間（Tspray）と最大休止時間（Tsleep）でＯＮ／ＯＦＦを繰り返すこととし、逆に設定値以下では噴霧条件不成立として噴霧を停止（休止）する。これにより、過剰な噴霧を回避することができ、環境条件の変化に対して自動的に噴霧間隔が調整される。即ち、この方法により、天候や窓開閉などの環境条件が変化しても、それに応じて休止間隔が自動的に調整される。 The present invention monitors the difference (ΔTwn) between the air temperature and the natural wet bulb temperature when the spraying and resting are alternately repeated for a predetermined time in the spray target time of such fine fog, and the difference between them is The control method is such that spraying is stopped when the set value or less is reached. In other words, when the difference (ΔTwn) between the measured air temperature and the natural wet bulb temperature is equal to or greater than the preset [temperature difference between the air temperature and the natural wet bulb temperature] (ΔTwn0) In this case, spraying is continued when the spraying condition is satisfied, but when it is small, spraying is stopped because the spraying condition is not satisfied. When the spraying condition is satisfied, ON / OFF is repeated with a preset maximum continuous spraying time (Tspray) and a maximum resting time (Tsleep), and conversely, spraying is stopped (paused) as the spraying condition is not satisfied below the set value. Accordingly, excessive spraying can be avoided, and the spraying interval is automatically adjusted with respect to changes in environmental conditions. That is, according to this method, even if environmental conditions such as weather and window opening / closing change, the pause interval is automatically adjusted accordingly.
この制御法は、噴霧時間と休止時間が設定でき、気温と自然湿球温度の差に応じてＯＮ／ＯＦＦする機能を持つ制御手段４で動作させる。
気温(Td)と自然湿球温度(Twn)との差（ΔTwn）が、例えば２．５℃以下になると噴霧を停止するように予め設定しておけば、この条件を満たしたときに噴霧が停止されることになる。
なお、気温(Td)と自然湿球温度(Twn)との差（ΔTwn）が、再び例えば２．５℃を超えるようになったときには、再度、所定時間だけ噴霧と休止を交互に繰り返す。
In this control method, the spraying time and the resting time can be set, and the control means 4 is operated by the function of turning on / off according to the difference between the air temperature and the natural wet bulb temperature.
If the difference (ΔTwn) between the temperature (Td) and the natural wet bulb temperature (Twn) is 2.5 ° C or less, for example, the spraying will stop when this condition is met. Will be stopped.
When the difference (ΔTwn) between the temperature (Td) and the natural wet bulb temperature (Twn) again exceeds 2.5 ° C., for example, the spraying and the rest are repeated alternately for a predetermined time again.
上記したように本発明では、噴霧制御のための指標として、空気湿度（相対湿度、湿球温度、露点など）ではなく、自然湿球温度センサの測定値（自然湿球温度、或いは非通風湿球温度）という、簡単な測定項目を用いる点が特徴である。自然湿球温度（或いは非通風湿球温度）は、高湿度条件での測定精度が高く、短時間の制御にも利用することができる。空気湿度ではなく、自然環境の物体の湿面温度や蒸発要求量に密接に対応している指標であることから、細霧の過剰噴霧による濡れを抑制することができる。 As described above, in the present invention, as an index for spray control, not the air humidity (relative humidity, wet bulb temperature, dew point, etc.) but the measured value (natural wet bulb temperature or non-ventilated humidity) of the natural wet bulb temperature sensor. The feature is that a simple measurement item (ball temperature) is used. The natural wet bulb temperature (or non-ventilated wet bulb temperature) has high measurement accuracy under high humidity conditions and can be used for short-time control. Since it is an index that closely corresponds to the wet surface temperature of the object in the natural environment and the required evaporation amount, not air humidity, wetting due to excessive spraying of fine mist can be suppressed.
自然湿球温度（日除けの傘をつけず感温部に日射があたる状態）を制御に用いると、日射を受けた湿面温度と気温との差で、人間の暑熱労働快適性の指標とされている湿球黒球温度（略称ＷＢＧＴ、ＪＩＳ Ｚ８５０４で規定）の算出式の主要な項であることから、これに基づく制御は、作業者がいるときの細霧噴霧する際に快適性をあまり悪化させない噴霧制御法をとるのに適している。
即ち、気温と自然湿球温度との差に基づいて制御すると、作業者の快適性が悪化しやすい条件での噴霧を抑止することができるが、このような作業者の快適性を考慮した噴霧ができる機能を持つ簡易な制御装置（コントローラ）は、これまで全くみられなかった。
また、自然湿球温度センサに、日除けの傘をかぶせて日射を遮ったときの測定値は、非通風湿球温度ということができる。気温と非通風湿球温度との差は、自然状態の湿面からの蒸発量に密接に対応しているので、これを噴霧運転／休止の判断に用いると、細霧噴霧効果を最大に近い状態で運転することができる方法である。
When the natural wet bulb temperature (in the state where the sun is exposed to the temperature-sensitive part without the sun umbrella) is used for control, the difference between the wet surface temperature and the temperature exposed to the sun is an indicator of human hot work comfort. Is a main term in the calculation formula of the wet bulb black bulb temperature (abbreviated as WBGT, defined in JIS Z8504). It is suitable for taking a spray control method that does not deteriorate.
That is, if the control is performed based on the difference between the temperature and the natural wet bulb temperature, spraying under conditions where the operator's comfort is likely to deteriorate can be suppressed. So far, no simple control device (controller) having a function capable of performing the above has been found.
Further, the measured value when the natural wet bulb temperature sensor is covered with a sunshade to block the solar radiation can be referred to as a non-ventilated wet bulb temperature. The difference between the air temperature and the non-ventilated wet bulb temperature closely corresponds to the amount of evaporation from the wet surface in the natural state. It is a method that can be operated in a state.
一般に用いられる相対湿度センサは、測定誤差が５％程度と大きく、特性の経日変化も大きい。例えば、３０℃で相対湿度９２％及び８９％のときには、相対湿度センサでは測定値の違いは不明瞭である。これに対して、気温と非通風湿球温度（自然湿球温度センサに日除けしたもの）との差は、それぞれ１．５℃、２．０℃となって、充分に検知可能な差となるので、これに基づく噴霧制御は精度が高く安定した動作をする。
なお、気温センサと自然湿球温度センサとの差に基づく制御では、湿球部の汚れによる濡れ不足や水補給忘れなどの心配があるが、濡れ不足や水切れが起こった場合には、噴霧動作をしない方向に働くので、安心して自動運転させることができる。
The relative humidity sensor generally used has a large measurement error of about 5%, and the characteristics change with time. For example, when the relative humidity is 92% and 89% at 30 ° C., the difference in the measured value is unclear in the relative humidity sensor. On the other hand, the difference between the air temperature and the non-ventilated wet bulb temperature (a natural wet bulb temperature sensor shaded) is 1.5 ° C. and 2.0 ° C., which are sufficiently detectable differences. Therefore, the spray control based on this performs a highly accurate and stable operation.
In the control based on the difference between the temperature sensor and the natural wet bulb temperature sensor, there is a concern that the wet bulb part may become insufficiently wet due to dirt or forget to replenish water. Because it works in the direction not to do, you can drive automatically with confidence.
園芸用施設で使用するには、サーモスタットで気温が一定以上になったら、上記手法により噴霧を実施する。気象条件や施設の換気条件が変化しても噴霧が過剰になる心配がないので、噴霧時間帯を限定せず、夜間でも乾燥していれば噴霧運転を続けることもできる。但し、植物体をある程度湿らせる状態に維持するように運転する場合については、数時間以上濡れが続いて病気が発生しないよう、タイマーで噴霧対象時間帯を設定しておくことが好ましい。 For use in horticultural facilities, when the temperature reaches a certain level or higher with a thermostat, spraying is performed by the above method. Even if the weather conditions and the ventilation conditions of the facility change, there is no fear of excessive spraying, so the spraying time zone is not limited and the spraying operation can be continued if it is dry even at night. However, in the case of driving so as to keep the plant body moistened to some extent, it is preferable to set the spray target time zone with a timer so that illness does not occur after wetting for several hours or more.
以上のように、本発明の制御方法と装置によれば、気温センサと自然湿球温度センサとの温度差を利用して細霧噴霧を制御することにより、園芸作物栽培施設や畜舎等の細霧冷房装置において、気象条件や施設の換気条件による蒸発要求量の変化に対応して自動的に噴霧量を調節し、長期間にわたり自動的に効果的な噴霧を安全に継続することができる。 As described above, according to the control method and apparatus of the present invention, the fine mist spray is controlled using the temperature difference between the air temperature sensor and the natural wet bulb temperature sensor, so that the horticultural crop cultivation facility, the barn, etc. In the mist cooling device, it is possible to automatically adjust the spray amount in response to a change in the required evaporation amount according to the weather condition or the ventilation condition of the facility, and to automatically continue the effective spray safely over a long period of time.
以下、本発明の実施例を示すが、本発明はこれにより何ら制限されるものではない。 Examples of the present invention will be described below, but the present invention is not limited thereby.
実施例１
図１に示す本発明の制御装置について図２に示す細霧噴霧制御のフロー図に従い、園芸ハウスにおいて細霧冷房を実施した。
本実施例においては、制御装置の動作条件は、以下のように設定した。
Example 1
According to the flow chart of fine fog spray control shown in FIG. 2 for the control device of the present invention shown in FIG. 1, fine fog cooling was performed in the garden house.
In this embodiment, the operating conditions of the control device are set as follows.
・噴霧開始温度（Td0）＝２７℃
・噴霧判定気温−自然湿球温度差（ΔTwn0）＝２．５℃
・最大連続噴霧時間（Tspray）＝１２秒
・最小休止時間（Tsleep）＝４８秒
-Spray start temperature (Td0) = 27 ° C
-Spray judgment temperature-natural wet bulb temperature difference (ΔTwn0) = 2.5 ° C
・ Maximum continuous spray time (Tspray) = 12 seconds ・ Minimum sleep time (Tsleep) = 48 seconds
図４は、気温（Td）と自然湿球温度（Twn）との差に基づく細霧噴霧制御を行ったときの噴霧動作タイミングを示す図であり、上段に気温（Td）、湿球温度（Tw）、及び自然湿球温度（Twn）の経時変化を、中段に気温（Td）と湿球温度（Tw）との差（Td‐Tw）、及び気温(Td)と自然湿球温度(Twn)との差（Td‐Twn）、つまりΔTwnの経時変化を、下段に噴霧信号出力の経時変化を、それぞれ示している。
なお、自然湿球温度（Twn）は、ＪＩＳ Ｚ８５０４に従い、温度測定部（感温部）を湿らせたガーゼ等で包んだ湿球からなる自然湿球温度センサを、空気中にそのままさらしたときの温度指示値である。この自然湿球温度を測定する自然湿球温度センサを図５に示す。温度測定部（感温部）Ｂはガーゼで包み、下部の水タンクＣから毛管現象で常時湿らせた。
FIG. 4 is a diagram showing the spraying operation timing when the fine fog spray control based on the difference between the air temperature (Td) and the natural wet bulb temperature (Twn) is performed. In the upper stage, the air temperature (Td) and the wet bulb temperature ( Tw) and natural wet bulb temperature (Twn) over time, the difference between temperature (Td) and wet bulb temperature (Tw) (Td-Tw), and temperature (Td) and natural wet bulb temperature (Twn) ) (Td−Twn), that is, the change with time of ΔTwn, and the change with time of the spray signal output is shown at the bottom.
Note that the natural wet bulb temperature (Twn) is determined by exposing a natural wet bulb temperature sensor consisting of wet bulbs wrapped with gauze moistened with a temperature measurement unit (temperature sensing unit) in accordance with JIS Z8504. Is the temperature indication value. A natural wet bulb temperature sensor for measuring the natural wet bulb temperature is shown in FIG. The temperature measuring part (temperature sensing part) B was wrapped with gauze and constantly moistened from the lower water tank C by capillary action.
この日は、気温(Td)と自然湿球温度(Twn)との差（Td‐Twn）、つまりΔTwnが、夜間も含めて１日のほとんどで２．０℃以上となる乾燥していた日である。
まず、８：００頃に気温が２７℃になって噴霧動作が開始されるが、気温(Td)と自然湿球温度(Twn)との差（Td‐Twn）が２．５℃以下になったりならなかったりして、噴霧したりしなかったりする時間が９：３０頃まで続く。日射があって気温(Td)と自然湿球温度(Twn)との差（Td‐Twn）が小さいときには、作業者の汗が高温になり不快に感じられる状態で、このような時には噴霧を頻繁には行わない動作となっている。
それ以後は、気温(Td)と自然湿球温度(Twn)との差（Td‐Twn）が常に２．５℃を超えていたため、１８：００頃まで、１２秒噴霧／４８秒休止を繰り返した。
１８：００頃から２０：００頃までは、気温が２７℃前後で、噴霧されると２７℃以下になり、噴霧しないと気温が２７℃以上になり、噴霧したりしなかったりする状態になっている。
さらに、２０時頃以降は、気温が２７℃以下になって、噴霧の対象外となって噴霧が行われなかった。
On this day, the difference between the temperature (Td) and the natural wet bulb temperature (Twn) (Td-Twn), that is, the day when ΔTwn was 2.0 ° C or higher for most of the day, including at night. It is.
First, at around 8:00, the air temperature reaches 27 ° C and the spraying operation starts, but the difference (Td – Twn) between the air temperature (Td) and the natural wet bulb temperature (Twn) becomes 2.5 ° C or less. The time of not spraying or not spraying continues until around 9:30. When the difference between the temperature (Td) and the natural wet bulb temperature (Twn) is small (Td-Twn), the worker's sweat becomes hot and feels uncomfortable. The operation is not performed.
Since then, the difference between the temperature (Td) and the natural wet bulb temperature (Twn) (Td-Twn) always exceeded 2.5 ° C, so repeated spraying for 12 seconds / pause for 48 seconds until around 18:00 It was.
From around 18:00 to around 20:00, the temperature is around 27 ° C., and when sprayed, it becomes 27 ° C. or lower, and when not sprayed, the temperature rises to 27 ° C. or higher, and does not spray. ing.
Furthermore, after about 20 o'clock, the temperature became 27 ° C. or less, and the spraying was not performed because it was not subject to spraying.
なお、この噴霧条件設定値を変更せずに２週間程度自動で運転したが、日射が雲で遮られたりして変動の大きい日や、午後から雨が降った場合など、従来のタイマー式コントローラでは設定値の頻繁な変更が要求される場合でも、適切な噴霧動作を行い過剰な噴霧で植物体や床面が濡れすぎることはなく、安定して動作した。 In addition, although it operated automatically for about two weeks without changing this spray condition setting value, the conventional timer type controller, such as the day when the solar radiation is blocked by clouds and the fluctuation is large, or when it rains in the afternoon Then, even when frequent changes in the set values were required, the plant body and floor were not wetted excessively by performing an appropriate spraying operation and operated stably.
従って、本発明は施設園芸の環境調節を扱う生物環境調節工学等の分野において有効に利用することができる。 Therefore, the present invention can be effectively used in fields such as biological environmental control engineering that handles environmental control of facility horticulture.
１ 気温センサ
２ 噴霧設定タイマ
３ 噴霧休止タイマ
４ 制御手段
５ 自然湿球温度センサ
Ａ 細霧噴霧ノズル
Ｂ 温度測定部（感温部）
Ｃ 水タンク
DESCRIPTION OF SYMBOLS 1 Air temperature sensor 2 Spray setting timer 3 Spray stop timer 4 Control means 5 Natural wet bulb temperature sensor A Fine fog spray nozzle B Temperature measurement part (temperature sensing part)
C Water tank
Claims (4)
A temperature sensor for measuring the temperature, a spray setting timer for setting the operation time of the fine fog spray, a spray pause timer for setting the pause time of the fine fog spray, and starting the operation of the fine fog spray based on the measured value of the temperature sensor And a control means for alternately controlling the operation and stop of the spray based on the input values of the spray setting timer and the spray stop timer, and a control device for the fine spray , Further comprising a natural wet bulb temperature sensor for measuring the natural wet bulb temperature, and the control means causes a difference between the measured value of the air temperature sensor and the measured value of the natural wet bulb temperature sensor to be a predetermined value or less. The fine mist spray control device in the fine mist cooling device, characterized in that the fine mist spray is sometimes stopped by the control means.
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| WO2010082350A1 (en) | 2009-01-19 | 2010-07-22 | ホーチキ株式会社 | Spray cooling facility and spray method |
| CN102313337A (en) * | 2011-10-18 | 2012-01-11 | 江苏中博通信有限公司设备分公司 | Water evaporation antifreezing judgment method for water evaporation air conditioner |
| TWI383815B (en) * | 2008-12-24 | 2013-02-01 | Hochiki Co | Fire and disaster prevention equipment, spraying methods, spray air-conditioning equipment and spray methods |
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| RU2813770C2 (en) * | 2022-06-27 | 2024-02-16 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Кубанский государственный аграрный университет имени И.Т. Трубилина" | Device for regulating microclimate in livestock building |
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