JPH0451746B2 - - Google Patents
Info
- Publication number
- JPH0451746B2 JPH0451746B2 JP61184199A JP18419986A JPH0451746B2 JP H0451746 B2 JPH0451746 B2 JP H0451746B2 JP 61184199 A JP61184199 A JP 61184199A JP 18419986 A JP18419986 A JP 18419986A JP H0451746 B2 JPH0451746 B2 JP H0451746B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- concentration
- brine
- alarm
- freezing
- 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 - Lifetime
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- Other Air-Conditioning Systems (AREA)
- Air Conditioning Control Device (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、ブラインを用いて空気より集熱する
ヒーテイングタワー付きヒートポンプの運転方
法、さらに詳しくは、ブラインの凍結事故を防止
する運転方法に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method of operating a heat pump with a heating tower that collects heat from air using brine, and more particularly, to an operating method of preventing brine freezing accidents. It is something.
従来から使用されてきた標準的な冷凍機又はヒ
ートポンプでは熱源として水を使用するものであ
つたため、水の凍結温度以下の冷却さえ回避すれ
ば凍結事故防止に対しては十分であつた。
Since standard refrigerators or heat pumps that have been used in the past use water as a heat source, it is sufficient to prevent freezing accidents by avoiding cooling the water below its freezing temperature.
また、工業用プロセス冷却用途の冷凍機で０℃
以下の低温で使用する場合はブラインを使用する
とはいえ、ブラインの濃度は一定なので、その濃
度における凍結温度にのみ注目すれば十分であつ
た。 In addition, a refrigerator for industrial process cooling uses a temperature of 0°C.
Although brine is used when used at lower temperatures, the concentration of brine is constant, so it was sufficient to focus only on the freezing temperature at that concentration.
即ち、従来では例えば温度検出器には警報温度
を一点だけ設定すれば足りるものであつた。 That is, conventionally, for example, it was sufficient to set only one alarm temperature on a temperature detector.
ところが、最近、ブラインを用いてヒーテイン
グタワーで空気より集熱するヒーテンイグタワー
付きヒートポンプが、空気熱源のヒートポンプで
ありながら低圧冷媒（R11など）が使用できて安
全であつたり、冷媒のサイクル効率が高いため省
エネルギーに向いていたり、設置場所が小さくで
きたり、特に夏期運転での成績係数（システム効
率）が飛躍的に高くできたりという多くの長所を
有していることから注目を集めている。 However, recently, heat pumps with heating towers that use brine to collect heat from the air using a heating tower have become safe because they can use low-pressure refrigerants (R11, etc.) even though they are air heat source heat pumps. It has attracted attention because it has many advantages such as being suitable for energy saving due to its high efficiency, allowing for a small installation space, and dramatically increasing the coefficient of performance (system efficiency) especially during summer operation. There is.
ところがこの新型のヒートポンプでは、使用す
るブラインの濃度が外気条件等により変動し、濃
度に応じて凍結温度が変化し、低温でも濃度が高
ければ凍結しないし、高温でも濃度が低ければ凍
結するので警報温度を一点に設定したのでは効率
の良い凍結防止が行われない。
However, with this new type of heat pump, the concentration of the brine used fluctuates depending on outside air conditions, etc., and the freezing temperature changes depending on the concentration.Even at low temperatures, if the concentration is high, it will not freeze, and even at high temperatures, if the concentration is low, it will freeze, so an alarm is issued. If the temperature is set at one point, efficient freezing prevention will not be achieved.
即ち、ブラインがヒーテイングタワー上部から
散布されるに当り、外気から熱を受け取ると同時
に、特に外気湿度が高い場合は水分まで受け取つ
てしまうためブライン濃度が低下してしまうこと
があつた。また経験によるとブライン濃度は低下
するばかりではなく、外気条件によつては（特に
湿度が低い場合）むしろ上昇することも多かつ
た。 That is, when the brine is sprayed from the top of the heating tower, it receives heat from the outside air and, especially when the outside air humidity is high, also receives moisture, resulting in a decrease in the brine concentration. Furthermore, experience has shown that the brine concentration not only decreases, but also often increases depending on the outside air conditions (particularly when humidity is low).
このように、外気条件の変動に応じてブライン
濃度が変動することが、凍結防止を難点としてい
る原因となつている。 As described above, the brine concentration fluctuates in response to fluctuations in outside air conditions, which makes prevention of freezing difficult.
ところでこの種のヒートポンプには比熱、粘度
などの関係からブライン濃度を所定の濃度範囲に
維持するために濃度管理を行うのが一般的であ
る。 By the way, in this type of heat pump, concentration control is generally performed to maintain the brine concentration within a predetermined concentration range due to the relationship between specific heat, viscosity, and the like.
そこで、前記所定の濃度範囲に管理されている
ブラインにおいて最も凍結温度が高い、最低濃度
に対応する凍結温度に近い警報温度を温度検出器
に設定することが考えられる。ところが、空気か
らの集熱の都合上、該凍結温度より低温で運転せ
ざるを得ない場合が生じることがある。その場合
は前記警報温度でヒートポンプを一旦停止させて
前記所定の温度範囲を高濃度領域に設定し直し
て、濃度を上げねばならない。 Therefore, it is conceivable to set an alarm temperature in the temperature detector close to the freezing temperature corresponding to the lowest concentration, which is the highest freezing temperature in the brine managed within the predetermined concentration range. However, due to heat collection from the air, it may be necessary to operate at a temperature lower than the freezing temperature. In that case, it is necessary to temporarily stop the heat pump at the alarm temperature and reset the predetermined temperature range to a high concentration region to increase the concentration.
また、前記凍結温度より低温で運転せざるを得
ない場合でも、その時点において濃度が高く、前
記凍結温度より低温で運転しても凍結のおそれの
全くない場合もある。その場合でも前記警報温度
でヒートポンプの運転は停止されるので、効率上
好ましくない。 Further, even if the operation is forced to be performed at a temperature lower than the freezing temperature, the concentration may be high at that point, and there may be no risk of freezing even if the operation is performed at a temperature lower than the freezing temperature. Even in this case, the operation of the heat pump is stopped at the alarm temperature, which is not preferable in terms of efficiency.
本発明は、従来のヒートポンプでは生じ得なか
つた、この新型ヒーテイングタワー付きヒートポ
ンプ特有の新規な問題点を解決しようとするもの
で、効率の良い運転方法を提供することを目的と
するものである。 The present invention aims to solve new problems unique to this new type of heat pump with a heating tower, which could not occur with conventional heat pumps, and aims to provide an efficient operating method. .
本発明は、上述の問題点を解決するための手段
として、ブラインを用いて空気より集熱するヒー
テイングタワー付きヒートポンプの運転方法にお
いて、前記ブラインの濃度と温度とを検出し、濃
度と温度との関係における凍結領域に対して所定
の余裕幅を持つ限界領域に基づいて凍結防止手段
を作動させるための警報温度の設定値を、変化す
るブライン濃度検出値に応じて変化せしめるこ
と、或いは前記限界領域に基づいて凍結防止手段
を作動させるための警報濃度の設定値を、変化す
るブライン温度検出値に応じて変化せしめること
を特徴とするヒーテイングタワー付きヒートポン
プの運転方法を提供しようとするものである。
As a means for solving the above-mentioned problems, the present invention provides a method for operating a heat pump with a heating tower that collects heat from air using brine, in which the concentration and temperature of the brine are detected, and the concentration and temperature are A set value of an alarm temperature for activating a freezing prevention means based on a limit area having a predetermined margin with respect to a frozen area in the relationship according to the changing brine concentration detection value, or the said limit An object of the present invention is to provide a method of operating a heat pump with a heating tower, characterized in that a set value of an alarm concentration for activating a freezing prevention means based on a region is changed in accordance with a changing brine temperature detection value. be.
本発明は、上述の構成を具備することにより、
ブラインの濃度と温度の両値からブラインの凍結
のおそれの有無を正しく判断し、凍結のおそれの
ある時のみ凍結防止手段を作動させることができ
る。従つて、凍結のおそれがないときに凍結防止
手段が作動してしまうことがなく、効率の良い運
転を行うことができる。
By having the above-described configuration, the present invention has the following features:
It is possible to correctly judge whether there is a risk of brine freezing based on both the concentration and temperature of the brine, and to operate the antifreeze means only when there is a risk of freezing. Therefore, the antifreeze means does not operate when there is no risk of freezing, and efficient operation can be performed.
本発明の実施例を図面を用いて説明する。 Embodiments of the present invention will be described using the drawings.
第１図はヒーテイングタワー付きヒートポンプ
の温水製造運転状態を示すフロー図で、１はクー
ラ、２は主圧縮機、３はエコノマイザ、４はブー
スタ圧縮機、５は温水コンデンサ、６はヒーテイ
ングタワーで、クーラ１、主圧縮機２、エコノマ
イザ３、ブースタ圧縮機４、温水コンデンサ５は
冷媒経路で接続されている。クーラ１とヒーテイ
ングタワー６はブライン経路７で接続されて空気
より集熱するようになつており、また、温水コン
デンサ５には温水経路８が設けられて温水を取出
すようになつている。 Figure 1 is a flow diagram showing the hot water production operation status of a heat pump with a heating tower, where 1 is a cooler, 2 is a main compressor, 3 is an economizer, 4 is a booster compressor, 5 is a hot water condenser, and 6 is a heating tower. The cooler 1, main compressor 2, economizer 3, booster compressor 4, and hot water condenser 5 are connected through a refrigerant path. The cooler 1 and the heating tower 6 are connected by a brine path 7 to collect heat from the air, and the hot water condenser 5 is provided with a hot water path 8 to take out hot water.
ブライン経路７のクーラ出口側には温度検出器
９と濃度検出器１０が設けられ、ヒーテイングタ
ワー出口側には濃縮装置１１が設けられている。 A temperature detector 9 and a concentration detector 10 are provided on the cooler outlet side of the brine path 7, and a concentrator 11 is provided on the heating tower outlet side.
温度検出器９と濃度検出器１０は制御装置１２
に連絡され、制御装置１２は両方の検出値から凍
結のおそれの有無を判断し、凍結のおそれがある
場合には主圧縮機２や濃縮装置１１に凍結防止の
ための操作信号１３を出すようになつている。 The temperature detector 9 and the concentration detector 10 are connected to the control device 12.
The controller 12 determines whether there is a risk of freezing based on both detected values, and if there is a risk of freezing, it issues an operation signal 13 to the main compressor 2 and concentrator 11 to prevent freezing. It's getting old.
制御装置１２での制御例を第２図を用いて説明
する。 An example of control by the control device 12 will be explained using FIG. 2.
制御装置１２の中に、各任意の濃度に対する凍
結温度よりも所定の温度だけ高くして余裕幅をも
たせた限界温度を警報温度として設定し、凍結領
域に余裕幅をもたせた限界領域内で凍結防止手段
を作動させ、運転許容領域では作動させない。例
えば濃度ξがξ1の場合は濃度ξ1に対応する限界温
度である温度t10を警報温度として設定する。そ
して例えば検出状態Ｐの検出濃度ξがξ1であると
き、検出温度ｔが濃度ξ1に対応する限界温度であ
る温度t10以下の限界領域内にあるときに危険と
判断し、操作信号１３を出す。 In the control device 12, a limit temperature that is a predetermined temperature higher than the freezing temperature for each arbitrary concentration with a margin is set as an alarm temperature, and freezing is performed within the limit range that has a margin in the freezing region. Activate the prevention means and do not activate them in the permissible driving range. For example, when the concentration ξ is ξ 1 , the temperature t 10 , which is the limit temperature corresponding to the concentration ξ 1 , is set as the alarm temperature. For example, when the detected concentration ξ of the detection state P is ξ 1 , when the detected temperature t is within the limit range below the temperature t 10 , which is the limit temperature corresponding to the concentration ξ 1 , it is determined to be dangerous, and the operation signal 13 issue.
又は、制御装置１２の中に、各任意の温度に対
する凍結温度よりも所定の濃度だけ高くして余裕
幅をもたせた限界濃度を警報濃度として設定す
る。例えば温度t1の場合は温度t1に対応する限界
濃度である濃度ξ10を警報濃度として設定する。
そして、例えば検出状態Ｑの検出温度ｔがt1であ
るとき、検出濃度ξが温度t1に対応する限界濃度
である濃度ξ10以下のときに危険と判断し、操作
信号１３を出す。 Alternatively, a limit concentration, which is higher than the freezing temperature for each arbitrary temperature by a predetermined concentration to provide a margin, is set as the alarm concentration in the control device 12. For example, in the case of temperature t 1 , the concentration ξ 10 which is the limit concentration corresponding to temperature t 1 is set as the alarm concentration.
For example, when the detected temperature t in the detection state Q is t 1 and the detected concentration ξ is less than the concentration ξ 10 which is the limit concentration corresponding to the temperature t 1 , it is determined to be dangerous and the operation signal 13 is issued.
次に別の制御例を示す。 Next, another control example will be shown.
濃度に変化許容範囲があるとき、その下限値の
濃度に対応する限界温度を警報温度として設定す
るが、検出温度が限界温度よりも高い場合は操作
信号１３を出さず、限界温度以下の場合は操作信
号１３を出す。例えば下限値の濃度をξmin.と
し、これに対応する限界温度をtmax.とすれば、
検出温度がtmax.になつたときに濃度ξを検出
し、検出値が濃度ξmin.以下である検出状態Ｒの
ときは操作信号１３を出し、濃度ξmin.より高い
検出状態Ｓのときは操作信号１３を出さない。こ
の制御例でも濃度下限値ξmin.に警報濃度を設定
しておき、温度検出値がtmax.以下のときに操作
信号１３を出すようにすることもできる。 When there is a permissible change range in the concentration, the limit temperature corresponding to the lower limit concentration is set as the alarm temperature, but if the detected temperature is higher than the limit temperature, the operation signal 13 is not output, and if it is below the limit temperature, the alarm temperature is set. The operation signal 13 is issued. For example, if the lower limit concentration is ξmin. and the corresponding limit temperature is tmax., then
When the detected temperature reaches tmax., the concentration ξ is detected, and when the detected value is in the detection state R, which is less than the concentration ξmin., the operation signal 13 is output, and when the detection state S is higher than the concentration ξmin., the operation signal is output. Don't roll 13. In this control example as well, the alarm concentration can be set at the concentration lower limit value ξmin., and the operation signal 13 can be output when the detected temperature value is below tmax.
さらに、異なる制御例について述べる。 Furthermore, different control examples will be described.
ブラインの濃度変化範囲を複数の小範囲に分
け、該小範囲の濃度範囲の最低濃度に対応する凍
結温度に余裕幅をもたせた警報温度を該小範囲の
濃度範囲の代表的警報温度とする。そして小範囲
各々の代表的警報温度に設定した温度検出器の温
度スイツチを対応して複数個設けると共に変化す
るブラインの濃度に応じて該当する温度スイツチ
を選択する制御部を設け、該選択した温度スイツ
チがその警報温度になつた時点で温度スイツチが
ONし操作信号が出されるものである。 The brine concentration change range is divided into a plurality of small ranges, and an alarm temperature with a margin around the freezing temperature corresponding to the lowest concentration in the small range is set as a representative alarm temperature for the concentration range in the small range. Then, a plurality of temperature switches of the temperature detectors corresponding to the representative alarm temperatures of each small range are provided, and a control section is provided to select the appropriate temperature switch according to the changing concentration of brine. When the switch reaches the alarm temperature, the temperature switch will
When turned on, an operation signal is issued.
この例でも、上述の２つの制御例と同様に、警
報温度に代えて警報濃度を設定することができ
る。 In this example as well, as in the two control examples described above, an alarm concentration can be set instead of the alarm temperature.
以上述べたように、本発明によれば、ブライン
を用いて空気より集熱するヒーテイングタワー付
きヒートポンプを運転するに際し、警報設定値を
変化するブライン検出値に応じて変化させること
により、効率の良い安定運転可能域を拡めること
ができ、実用上顕著な効果を奏するものである。
As described above, according to the present invention, when operating a heat pump with a heating tower that collects heat from air using brine, efficiency can be improved by changing the alarm set value in accordance with the changing brine detection value. It is possible to widen the range in which good and stable operation is possible, and this has a significant practical effect.
図面は本発明の実施例を示し、第１図は全体の
フロー図、第２図は濃度と温度との関係を示す線
図である。
１……クーラ、２……主圧縮機、３……エコノ
マイザ、４……ブースタ圧縮機、５……温水コン
デンサ、６……ヒーテイングタワー、７……ブラ
イン経路、８……温水経路、９……温度検出器、
１０……濃度検出器、１１……濃縮装置、１２…
…制御装置、１３……操作信号。
The drawings show an embodiment of the present invention, and FIG. 1 is an overall flow diagram, and FIG. 2 is a diagram showing the relationship between concentration and temperature. 1... Cooler, 2... Main compressor, 3... Economizer, 4... Booster compressor, 5... Hot water condenser, 6... Heating tower, 7... Brine path, 8... Hot water path, 9 ...temperature detector,
10... Concentration detector, 11... Concentrator, 12...
...control device, 13...operation signal.
Claims (1)
ングタワー付きヒートポンプの運転方法におい
て、 前記ブラインの濃度と温度とを検出し、 濃度と温度との関係における凍結領域に対して
所定の余裕幅を持つ限界領域に基づいて凍結防止
手段を作動させるための警報温度の設定値を、変
化するブライン濃度検出値に応じて変化せしめる
こと、 或いは前記限界領域に基づいて凍結防止手段を
作動させるための警報濃度の設定値を、変化する
ブライン温度検出値に応じて変化せしめること を特徴とするヒーテイングタワー付きヒートポン
プの運転方法。 ２ ブライン濃度変化範囲を複数の小範囲に分
け、各小範囲ごとに代表的警報温度を定め、各警
報温度に設定した複数個の温度検出器を設け、変
化するブラインの濃度に応じて前記温度検出器を
選択する特許請求の範囲第１項記載のヒーテイン
グタワー付きヒートポンプの運転方法。[Claims] 1. A method for operating a heat pump equipped with a heating tower that collects heat from air using brine, which comprises: detecting the concentration and temperature of the brine; A set value of an alarm temperature for activating the anti-freeze means based on a limit range having a margin of 1. A method for operating a heat pump with a heating tower, characterized in that a set value of an alarm concentration for controlling the temperature is changed in accordance with a changing brine temperature detection value. 2 Divide the brine concentration change range into multiple small ranges, set a representative alarm temperature for each small range, provide multiple temperature detectors set to each alarm temperature, and adjust the temperature according to the changing brine concentration. A method for operating a heat pump with a heating tower according to claim 1, wherein a detector is selected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61184199A JPS6341779A (en) | 1986-08-07 | 1986-08-07 | Method of operating heat pump with heating tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61184199A JPS6341779A (en) | 1986-08-07 | 1986-08-07 | Method of operating heat pump with heating tower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6341779A JPS6341779A (en) | 1988-02-23 |
| JPH0451746B2 true JPH0451746B2 (en) | 1992-08-19 |
Family
ID=16149089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61184199A Granted JPS6341779A (en) | 1986-08-07 | 1986-08-07 | Method of operating heat pump with heating tower |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6341779A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2848714B2 (en) * | 1991-03-25 | 1999-01-20 | 高砂熱学工業株式会社 | Heat pump type air conditioning method using antifreeze |
| JP4875934B2 (en) * | 2006-07-03 | 2012-02-15 | 株式会社不二工機 | Control device |
| JP4844601B2 (en) * | 2008-07-30 | 2011-12-28 | ダイキン工業株式会社 | Refrigeration equipment |
| JP5484503B2 (en) * | 2012-03-14 | 2014-05-07 | 三菱電機株式会社 | Cooling system |
| JP5984965B2 (en) * | 2012-12-11 | 2016-09-06 | 三菱電機株式会社 | Air conditioning and hot water supply complex system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5216600U (en) * | 1975-07-24 | 1977-02-05 | ||
| JPS6330938Y2 (en) * | 1980-09-10 | 1988-08-18 | ||
| JPS61173058A (en) * | 1985-01-25 | 1986-08-04 | 株式会社荏原製作所 | Method of operating heat pump |
-
1986
- 1986-08-07 JP JP61184199A patent/JPS6341779A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6341779A (en) | 1988-02-23 |
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