JPH07104060B2 - Starter for dual refrigeration system - Google Patents
Starter for dual refrigeration systemInfo
- Publication number
- JPH07104060B2 JPH07104060B2 JP29711788A JP29711788A JPH07104060B2 JP H07104060 B2 JPH07104060 B2 JP H07104060B2 JP 29711788 A JP29711788 A JP 29711788A JP 29711788 A JP29711788 A JP 29711788A JP H07104060 B2 JPH07104060 B2 JP H07104060B2
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- JP
- Japan
- Prior art keywords
- temperature side
- high temperature
- side compressor
- low temperature
- compressor
- 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.)
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- Devices That Are Associated With Refrigeration Equipment (AREA)
Description
【発明の詳細な説明】 (産業上の利用分野) 本発明は、二元冷凍装置の起動装置、詳しくはそれぞれ
独立した低温側冷媒系と高温側冷媒系とを備え、カスケ
ード式凝縮器を介して、低温側冷媒系を冷媒を高温側冷
媒系の冷媒で冷却するようにした二元冷凍装置の起動装
置に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a starting device for a binary refrigeration system, and more specifically, to a low temperature side refrigerant system and a high temperature side refrigerant system, which are independent of each other, via a cascade condenser. And a starting device for a binary refrigeration system in which the low temperature side refrigerant system is cooled by the high temperature side refrigerant system.
(従来の技術) 従来、この種二元冷凍装置は、例えば特開昭62−293051
号公報に記載され、かつ、第3図に示したごとく、低温
側圧縮機(LC)、カスケード式凝縮器(CC)と低温側膨
張弁(LV)及び蒸発器(LE)などを備えた低温側の冷媒
系(L)と、高温側圧縮機(HC)、凝縮器(C)と高温
側膨張弁(HV)及び前記カスケード式凝縮器(CC)と熱
交換する蒸発器(HE)などを備えた高温側冷媒系(H)
とで構成される。(Prior Art) Conventionally, a binary refrigeration system of this type is disclosed in, for example, Japanese Patent Laid-Open No. 293051/1987.
As shown in Fig. 3 and shown in Fig. 3, the low temperature side includes a low temperature side compressor (LC), a cascade condenser (CC), a low temperature side expansion valve (LV) and an evaporator (LE). Side refrigerant system (L), high temperature side compressor (HC), condenser (C) and high temperature side expansion valve (HV), and an evaporator (HE) that exchanges heat with the cascade type condenser (CC). High temperature side refrigerant system (H)
Composed of and.
また、以上のような二元冷凍装置の起動装置としては、
通常タイマーを使用し、先ず、前記高温側冷媒系(H)
の高温側圧縮機(HC)を起動させた後で、前記タイマー
で設定した一定時間が経過したとき、つまり前記カスケ
ード式凝縮器(CC)が充分に冷却された後に、前記低温
側冷媒系(L)の低温側圧縮機(LC)を起動させて、前
記カスケード式凝縮器(CC)を通過する冷媒を充分に冷
却させるようにしている。In addition, as a starter of the above-mentioned binary refrigeration system,
Using a normal timer, first, the high temperature side refrigerant system (H)
After activating the high temperature side compressor (HC), the constant temperature set by the timer elapses, that is, after the cascade condenser (CC) is sufficiently cooled, the low temperature side refrigerant system ( The low temperature side compressor (LC) of L) is activated to sufficiently cool the refrigerant passing through the cascade condenser (CC).
(発明が解決しようとする課題) 所で、以上の起動装置では、前記高温側圧縮機(HC)の
起動後で前記タイマーによる設定時間を経過したときに
は、前記低温側圧縮機(HC)が必ず起動されることか
ら、次のような問題が発生したのである。(Problems to be solved by the invention) However, in the above startup device, when the set time by the timer elapses after the startup of the high temperature side compressor (HC), the low temperature side compressor (HC) is always Since it was started, the following problems occurred.
即ち、前記高温側冷媒系(H)に異常が発生したとき、
例えば、冷媒抜けなどにより前記高温側冷媒系(H)の
循環冷媒量が不足したり、また、前記高温側膨張弁(H
V)の不良により能力が不足したような場合など何らか
の異常があった場合には、前記カスケード式凝縮器(C
C)が充分に冷却されないのであるが、斯かる場合にあ
っても、前記タイマーによる設定時間を経過すると、前
記低温側圧縮機(LC)が起動されるため、換言すれば、
前記カスケード式凝縮器(CC)が充分に冷却されていな
い状態で、前記低温側冷媒系(L)を低温膨張形の冷媒
が流れるために、該低温側冷媒系(L)を流れる冷媒圧
力が極端に上昇し、過負荷運転を招いて、危険であるば
かりか、前記低温側冷媒系(L)の構成部品を破損した
りすることがあった。That is, when an abnormality occurs in the high temperature side refrigerant system (H),
For example, the amount of circulating refrigerant in the high temperature side refrigerant system (H) becomes insufficient due to refrigerant leakage, or the high temperature side expansion valve (H)
If there is any abnormality such as insufficient capacity due to defective V), the cascade condenser (C
Although C) is not sufficiently cooled, even in such a case, when the time set by the timer elapses, the low temperature side compressor (LC) is activated, in other words,
Since the low temperature expansion type refrigerant flows through the low temperature side refrigerant system (L) while the cascade type condenser (CC) is not sufficiently cooled, the refrigerant pressure flowing through the low temperature side refrigerant system (L) is The temperature rises extremely and causes overload operation, which is not only dangerous, but also the components of the low temperature side refrigerant system (L) may be damaged.
本発明は以上のような問題に鑑みてなしたもので、その
目的は、高温側冷媒系に異常などがあって、カスケード
式凝縮器が充分に冷却されていない場合には、低温側圧
縮機の起動を中止させて、低温側冷媒系の破損事故など
を未然に防止することができる二元冷凍装置の起動装置
を提供することにある。The present invention has been made in view of the above problems, and an object thereof is to provide a low temperature side compressor when there is an abnormality in the high temperature side refrigerant system and the cascade type condenser is not sufficiently cooled. It is an object of the present invention to provide a starter for a dual refrigeration system that can prevent the accident of damage to the low temperature side refrigerant system and the like by stopping the start of the above.
(課題を解決するための手段) 上記目的を達成するために、本発明は、低温側圧縮機
(1)、カスケード式凝縮器(2)と低温側膨張弁
(3)及び蒸発器(5)とを介装した低温側冷媒配管
(6)を備えた低温側冷媒系(L)と、高温側圧縮機
(11)、凝縮器(13)と高温側膨張弁(14)及び前記カ
スケード式凝縮器(2)と熱交換する蒸発器(15)とを
介装した高温側冷媒配管(16)を備えた高温側冷媒系
(H)とから成る二元冷凍装置の起動装置において、前
記高温側冷媒配管(16)の低圧回路部分を流れる冷媒の
温度を検出するサーモスタット(21)を設けると共に、
運転開始時、前記高温側圧縮機(11)を起動し、前記サ
ーモスタット(21)の検出温度が設定温度以下になった
とき、前記低温側圧縮機(1)を起動させ、かつ、前記
低圧回路部分の冷媒温度が、前記高温側圧縮機(11)の
起動後一定時間を経過しても設定温度以下にならないと
き、前記高温側圧縮機(11)を停止させるコントローラ
(22)を設けたことを特徴とするものである。(Means for Solving the Problems) In order to achieve the above object, the present invention provides a low temperature side compressor (1), a cascade condenser (2), a low temperature side expansion valve (3) and an evaporator (5). A low temperature side refrigerant system (L) having a low temperature side refrigerant pipe (6), a high temperature side compressor (11), a condenser (13), a high temperature side expansion valve (14), and the cascade condensation A high temperature side refrigerant system (H) comprising a high temperature side refrigerant pipe (16) having a high temperature side refrigerant pipe (16) interposed between an evaporator (2) and an evaporator (15) for heat exchange, the high temperature side A thermostat (21) for detecting the temperature of the refrigerant flowing through the low pressure circuit portion of the refrigerant pipe (16) is provided,
When the operation is started, the high temperature side compressor (11) is started, and when the detected temperature of the thermostat (21) becomes equal to or lower than a set temperature, the low temperature side compressor (1) is started and the low pressure circuit is A controller (22) is provided for stopping the high temperature side compressor (11) when the temperature of the refrigerant in the part does not fall below the set temperature even after a certain period of time has passed after the high temperature side compressor (11) is started. It is characterized by.
(作用) 前記高温側圧縮機(11)の起動後に、前記サーモスタッ
ト(21)で前記高温側冷媒系(H)の低圧回路部分を流
れる冷媒温度が検出され、この検出温度が設定温度以下
の場合に、つまり前記カスケード式凝縮器(2)が充分
に冷却されたときに、始めて前記コントローラ(22)か
らの指令で前記低温側圧縮機(1)が起動される。(Operation) When the temperature of the refrigerant flowing in the low pressure circuit part of the high temperature side refrigerant system (H) is detected by the thermostat (21) after the high temperature side compressor (11) is started, and the detected temperature is equal to or lower than the set temperature That is, that is, when the cascade type condenser (2) is sufficiently cooled, the low temperature side compressor (1) is started for the first time by a command from the controller (22).
また、前記高温側圧縮機(11)の起動後で、前記サーモ
スタット(21)の検出温度が設定温度以上の場合は、つ
まり前記カスケード式凝縮器(2)が充分に冷却されて
いないときには、前記コントローラ(22)からの指令
で、前記低温側圧縮機(1)は停止状態に保持され、か
つ、前記サーモスタット(21)による検出温度が、一定
時間経過しても設定温度以下とならない場合には、前記
コントローラ(22)からの指令で、前記高温側冷媒系
(H)に異常があるとして、前記高温側圧縮機(11)が
停止される。Further, when the temperature detected by the thermostat (21) is equal to or higher than a set temperature after the high temperature side compressor (11) is started, that is, when the cascade type condenser (2) is not sufficiently cooled, When the low temperature side compressor (1) is held in a stopped state by the command from the controller (22) and the temperature detected by the thermostat (21) does not fall below the set temperature even after a certain period of time elapses. In response to a command from the controller (22), it is determined that the high temperature side refrigerant system (H) is abnormal, and the high temperature side compressor (11) is stopped.
(実施例) 第1図に示した二元冷凍装置は、それぞれ独立した低温
側冷媒系(L)と高温側冷媒系(H)とを備え、この低
温側冷媒系(L)は、低温側圧縮機(1)とカスケード
式の凝縮器(2)と低温側膨張弁(3)及びファン
(4)を付設した蒸発器(5)とを、それぞれ低温側冷
媒配管(6)で接続して構成され、また、前記高温側冷
媒系(H)は、高温側圧縮機(11)とファン(12)の付
設した凝縮器(13)と高温側膨張弁(14)及び前記カス
ケード式凝縮器(2)と熱交換する蒸発器(15)とを、
それぞれ高温側冷媒配管(16)で接続して構成されてい
る。(Embodiment) The binary refrigeration system shown in FIG. 1 includes a low temperature side refrigerant system (L) and a high temperature side refrigerant system (H) which are independent of each other, and the low temperature side refrigerant system (L) is a low temperature side refrigerant system. A compressor (1), a cascade type condenser (2), an evaporator (5) provided with a low temperature side expansion valve (3) and a fan (4) are connected by a low temperature side refrigerant pipe (6), respectively. The high temperature side refrigerant system (H) includes a condenser (13) provided with a high temperature side compressor (11) and a fan (12), a high temperature side expansion valve (14) and the cascade type condenser ( 2) an evaporator (15) that exchanges heat with
Each of them is connected by a high temperature side refrigerant pipe (16).
また、前記低温側冷媒配管(6)における低温側圧縮機
(1)と蒸発器(5)との間には膨張タンク(7)を接
続して、前記冷媒配管(6)を循環される低温膨張形の
冷媒が高温となって膨張されたとき、この冷媒一部を前
記膨張タンク(7)内に収納退避させるようにしてい
る。Further, an expansion tank (7) is connected between the low temperature side compressor (1) and the evaporator (5) in the low temperature side refrigerant pipe (6), and low temperature is circulated in the refrigerant pipe (6). When the expansion type refrigerant has a high temperature and is expanded, a part of the expansion type refrigerant is stored and retracted in the expansion tank (7).
しかして、以上の二元冷凍装置における起動装置を、次
のように構成したのである。Therefore, the starting device in the above-described binary refrigeration system is configured as follows.
即ち、前記高温側冷媒配管(16)の低圧回路部分、例え
ば該冷却配管(16)における前記高温側圧縮機(11)と
蒸発器(15)との中間部位に、サーモスタット(21)を
接続して、該サーモスタット(21)で前記低圧回路部分
を流れる冷媒温度を検出するようになすと共に、前記サ
ーモスタット(21)にコントローラ(22)を接続して、
このコントローラ(22)で、前記二元冷凍装置の運転開
始時に、先ず、前記高温側圧縮機(11)を起動させ、該
圧縮機(11)の起動に伴い前記サーモスタット(21)で
検出される検出温度が、所定の設定温度(例えば前記低
温側冷媒系(L)を循環される冷媒の凝縮温度)以下に
なったとき、始めて前記低温側圧縮機(1)を起動させ
るようになし、また、前記サーモスタット(21)による
検出温度が、前記高温側圧縮機(11)の起動後一定時間
を経過しても前記設定温度以下にならないときは、前記
高温側圧縮機(11)を停止させるようにしたものであ
る。That is, a thermostat (21) is connected to a low pressure circuit part of the high temperature side refrigerant pipe (16), for example, an intermediate portion between the high temperature side compressor (11) and the evaporator (15) in the cooling pipe (16). The thermostat (21) is adapted to detect the temperature of the refrigerant flowing through the low pressure circuit part, and the controller (22) is connected to the thermostat (21),
With this controller (22), when the operation of the dual refrigeration system is started, first, the high temperature side compressor (11) is started, and is detected by the thermostat (21) when the compressor (11) is started. When the detected temperature becomes equal to or lower than a predetermined set temperature (for example, the condensation temperature of the refrigerant circulating in the low temperature side refrigerant system (L)), the low temperature side compressor (1) is not started for the first time, and If the temperature detected by the thermostat (21) does not fall below the set temperature even after a certain period of time has passed after the start of the high temperature side compressor (11), the high temperature side compressor (11) is stopped. It is the one.
次に、以上の起動装置を、第2図に示したフローチャー
トに基づいて説明する。Next, the above-mentioned starting device will be described with reference to the flowchart shown in FIG.
先ず、スタート開始(ステップ1)と同時に、前記高温
側圧縮機(11)が起動(ステップ2)されて、前記コン
トローラ(22)に組込んだタイマーが経過時間(t=
0)の状態からスタート(ステップ3)され、この後ス
テップ4において、前記サーモスタット(21)の検出温
度(T)が設定温度(TS)より以下であるか否かが、前
記コントローラ(22)で判断され、イエスの場合に、つ
まり前記高温側圧縮機(11)の起動に伴い前記カスケー
ド式凝縮器(2)が充分に冷却されている場合に、始め
てステップ5において、前記低温側圧縮機(1)が起動
される。First, at the same time as the start (step 1), the high temperature side compressor (11) is started (step 2), and the timer incorporated in the controller (22) causes the elapsed time (t =
The controller (22) determines whether or not the temperature (T) detected by the thermostat (21) is lower than the set temperature (TS) in step 4 after starting from the state (0) (step 3). If yes, that is, if the cascade condenser (2) has been sufficiently cooled due to the activation of the high temperature side compressor (11), the low temperature side compressor ( 1) is activated.
また、前記ステップ4での判断結果がノーの場合には、
ステップ6において、前記高温側圧縮機(11)の起動開
始からの経過時間(t)が、前記タイマーで設定した設
定時間(ts)より大であるか否かが判断され、ノーの場
合、つまり高温側圧縮機(11)の起動開始時間(t)が
未だ設定時間(ts)を経過していないときには、前記ス
テップ4からの経過が繰り返され、イエスの場合には、
つまり高温側圧縮機(11)の起動開始時間(t)が設定
時間(ts)を経過し、しかも前記サーモスタット(21)
の検出温度(T)が設定温度(TS)より低くならず、前
記カスケード式凝縮器(2)が充分に冷却されていない
ときには、前記高温側冷媒系(H)に異常があると判断
されて、前記コントローラ(22)で前記高温側圧縮機
(11)が停止される。If the result of the determination in step 4 is NO,
In step 6, it is judged whether or not the elapsed time (t) from the start of activation of the high temperature side compressor (11) is longer than the set time (ts) set by the timer. When the activation start time (t) of the high temperature side compressor (11) has not yet passed the set time (ts), the process from step 4 is repeated, and in the case of Yes,
That is, the start-up time (t) of the high temperature side compressor (11) has passed the set time (ts), and the thermostat (21)
When the detected temperature (T) is not lower than the set temperature (TS) and the cascade condenser (2) is not sufficiently cooled, it is judged that the high temperature side refrigerant system (H) is abnormal. The high temperature side compressor (11) is stopped by the controller (22).
(発明の効果) 以上説明したように、本発明の起動装置では、高温側冷
媒配管(16)の低圧回路部分を流れる冷媒温度を検出す
るサーモスタット(21)を設けると共に、運転開始時、
高温側圧縮機(11)を起動させ、前記サーモスタット
(21)の検出温度が設定温度以下になったとき、低温側
圧縮機(1)を起動させ、かつ、前記低圧回路部分の冷
媒温度が、前記高温側圧縮機(11)の起動後一定時間を
経過しても設定温度以下にならないとき、該高温側圧縮
機(11)を停止するコントローラ(22)を設けたから、
低温側冷媒系(L)での過負荷運転や破損事故を未然に
防止できて、この低温側冷媒系(L)の安全な運転が可
能となり、しかも、前記高温側圧縮機(11)の起動後
に、前記サーモスタット(21)による検出温度が設定温
度以下となれば、即座に前記低温側圧縮機(1)が起動
されるため、従来のタイマーで前記低温側圧縮機(1)
の起動時間を決定するものと比べて、運転開始時の立上
がり時間を短縮できるのである。(Effects of the Invention) As described above, in the startup device of the present invention, the thermostat (21) for detecting the temperature of the refrigerant flowing through the low pressure circuit portion of the high temperature side refrigerant pipe (16) is provided, and at the start of operation,
When the high temperature side compressor (11) is started and the detected temperature of the thermostat (21) becomes equal to or lower than the set temperature, the low temperature side compressor (1) is started and the refrigerant temperature of the low pressure circuit part is Since the controller (22) for stopping the high temperature side compressor (11) is provided when the temperature does not fall below the set temperature even after a lapse of a certain time after the high temperature side compressor (11) is started,
It is possible to prevent overload operation and damage accidents in the low temperature side refrigerant system (L) in advance, enable safe operation of the low temperature side refrigerant system (L), and start the high temperature side compressor (11). After that, when the temperature detected by the thermostat (21) becomes equal to or lower than the set temperature, the low temperature side compressor (1) is immediately started, so that the low temperature side compressor (1) is activated by the conventional timer.
It is possible to shorten the start-up time at the start of operation, as compared with the case where the start-up time is determined.
第1図は本発明にかかる二元冷凍装置の起動装置を示す
回路図、第2図は同起動装置の起動態様を示すフローチ
ャート図、第3図は従来例を示す回路図である。 (L)……低温側冷媒系 (H)……高温側冷媒系 (1)……低温側圧縮機 (2)……カスケード式凝縮器 (3)……低温側膨張弁 (5)……蒸発器 (6)……低温側冷媒配管 (11)……高温側圧縮機 (13)……凝縮器 (14)……高温側膨張弁 (15)……蒸発器 (16)……高温側冷媒配管 (21)……サーモスタット (22)……コントローラFIG. 1 is a circuit diagram showing a starting device of a dual refrigeration system according to the present invention, FIG. 2 is a flow chart diagram showing a starting mode of the starting device, and FIG. 3 is a circuit diagram showing a conventional example. (L) …… Low temperature side refrigerant system (H) …… High temperature side refrigerant system (1) …… Low temperature side compressor (2) …… Cascade type condenser (3) …… Low temperature side expansion valve (5) …… Evaporator (6) …… Low temperature side refrigerant pipe (11) …… High temperature side compressor (13) …… Condenser (14) …… High temperature side expansion valve (15) …… Evaporator (16) …… High temperature side Refrigerant piping (21) …… Thermostat (22) …… Controller
Claims (1)
(2)と低温側膨張弁(3)及び蒸発器(5)とを介装
した低温側冷媒配管(6)を備えた低温側冷媒系(L)
と、高温側圧縮機(11)、凝縮器(13)と高温側膨張弁
(14)及び前記カスケード式凝縮器(2)と熱交換する
蒸発器(15)とを介装した高温側冷媒配管(16)を備え
た高温側冷媒系(H)とから成る二元冷凍装置の起動装
置であって、前記高温側冷媒配管(16)の低圧回路部分
を流れる冷媒の温度を検出するサーモスタット(21)を
設けると共に、運転開始時、前記高温側圧縮機(11)を
起動し、前記サーモスタット(21)の検出温度が設定温
度以下になったとき、前記低温側圧縮機(1)を起動さ
せ、かつ、前記低圧回路部分の冷媒温度が、前記高温側
圧縮機(11)の起動後一定時間を経過しても設定温度以
下にならないとき、前記高温側圧縮機(11)を停止させ
るコントローラ(22)を設けたことを特徴とする二元冷
凍装置の起動装置。A low temperature refrigerant pipe (6) having a low temperature side compressor (1), a cascade condenser (2), a low temperature side expansion valve (3) and an evaporator (5). Side refrigerant system (L)
And a high temperature side compressor (11), a condenser (13), a high temperature side expansion valve (14), and an evaporator (15) for exchanging heat with the cascade type condenser (2). A starting device for a binary refrigeration system comprising a high temperature side refrigerant system (H) including (16), wherein a thermostat (21) for detecting the temperature of the refrigerant flowing through the low pressure circuit part of the high temperature side refrigerant pipe (16). ) Is provided, the high temperature side compressor (11) is started at the start of operation, and the low temperature side compressor (1) is started when the detected temperature of the thermostat (21) becomes equal to or lower than a set temperature, A controller (22) for stopping the high temperature side compressor (11) when the temperature of the refrigerant in the low pressure circuit portion does not fall below the set temperature even after a certain time has elapsed after the high temperature side compressor (11) is started. ) Is provided, the starter of the dual refrigeration system.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP29711788A JPH07104060B2 (en) | 1988-11-24 | 1988-11-24 | Starter for dual refrigeration system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP29711788A JPH07104060B2 (en) | 1988-11-24 | 1988-11-24 | Starter for dual refrigeration system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH02143056A JPH02143056A (en) | 1990-06-01 |
JPH07104060B2 true JPH07104060B2 (en) | 1995-11-13 |
Family
ID=17842431
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP29711788A Expired - Fee Related JPH07104060B2 (en) | 1988-11-24 | 1988-11-24 | Starter for dual refrigeration system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH07104060B2 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100385432B1 (en) * | 2000-09-19 | 2003-05-27 | 주식회사 케이씨텍 | Surface cleaning aerosol production system |
KR100750238B1 (en) * | 2006-10-13 | 2007-08-17 | 위니아만도 주식회사 | Cooling system protecting apparatus and method using temperature of suction pipe |
JP5313093B2 (en) | 2008-09-16 | 2013-10-09 | パナソニックヘルスケア株式会社 | Refrigeration equipment |
JP5826722B2 (en) * | 2012-07-23 | 2015-12-02 | 日立アプライアンス株式会社 | Dual refrigeration equipment |
JP2014055753A (en) * | 2012-09-14 | 2014-03-27 | Hitachi Appliances Inc | Binary refrigeration device |
CN114151987B (en) * | 2021-11-12 | 2023-05-12 | 青岛澳柯玛生物医疗有限公司 | Parallel control method for compressor units |
-
1988
- 1988-11-24 JP JP29711788A patent/JPH07104060B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH02143056A (en) | 1990-06-01 |
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