JPH02183766A - Freezer device - Google Patents
Freezer deviceInfo
- Publication number
- JPH02183766A JPH02183766A JP244089A JP244089A JPH02183766A JP H02183766 A JPH02183766 A JP H02183766A JP 244089 A JP244089 A JP 244089A JP 244089 A JP244089 A JP 244089A JP H02183766 A JPH02183766 A JP H02183766A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- compressor
- gas
- high level
- recovery device
- 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.)
- Granted
Links
- 238000011084 recovery Methods 0.000 claims abstract description 26
- 238000005057 refrigeration Methods 0.000 claims description 13
- 235000003642 hunger Nutrition 0.000 claims description 11
- 230000037351 starvation Effects 0.000 claims description 11
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 239000003507 refrigerant Substances 0.000 abstract description 11
- 238000002844 melting Methods 0.000 abstract 2
- 230000008018 melting Effects 0.000 abstract 2
- 238000000034 method Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 5
- 239000012267 brine Substances 0.000 description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 206010017740 Gas poisoning Diseases 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Landscapes
- Control Of Positive-Displacement Pumps (AREA)
Abstract
Description
【発明の詳細な説明】 （産業上の利用分野） 装置に関する。[Detailed description of the invention] (Industrial application field) Regarding equipment.
（従来の技術）・
従来、この種冷凍装置は、スクリュー圧縮機の冷媒吐出
側に、油回収器と凝縮器と膨張機構及び蒸発器を順次接
続し、前記油回収器の上部側と前記圧縮機の吸入側との
間に、開閉弁をもった均圧管を介装すると共に、前記油
回収器に、その内部に貯溜される油の高レベル限界値を
検出する高レベル検出器と、同じく低レベル限界値を検
出する低レベル検出器とをそれぞれ設けている。(Prior art) - Conventionally, this type of refrigeration equipment connects an oil recovery device, a condenser, an expansion mechanism, and an evaporator in sequence to the refrigerant discharge side of a screw compressor, and connects the upper side of the oil recovery device and the compression device. A pressure equalizing pipe with an on-off valve is interposed between the oil collector and the suction side of the machine, and a high level detector is installed in the oil collector to detect the high level limit value of the oil stored therein. and a low level detector for detecting a low level limit value.
斯（して、冷凍運転時に、前記油回収器で回収された油
を前記圧縮機に給油して、該圧縮機の軸受箇所を潤滑し
たり、冷媒ガスの冷却を行うのであるが、斯かる冷凍運
転時に、前記油回収器内の貯溜部が所定の低レベル限界
値以下となったとき、前記低レベル検出器からの信号で
前記圧縮機の運転を中止して、その軸受箇所の焼損事故
などを未然に防止するようにしている。(Thus, during refrigeration operation, the oil recovered by the oil recovery device is supplied to the compressor to lubricate the bearings of the compressor and cool the refrigerant gas. During refrigeration operation, when the reservoir in the oil recovery device falls below a predetermined low level limit value, the compressor operation is stopped by a signal from the low level detector, thereby preventing a burnout accident at the bearing location. We are trying to prevent such things from happening.
また、前記圧縮機の運転停止時には、前記開閉弁が開動
作され、前記均圧管を介して圧縮機の吸入側と高圧側の
油回収器の内部とが相互に連通均圧化されるため、斯か
る場合に、前記油回収器内に所定の高レベル限界値以上
にまで油が貯溜されていると、この油が前記圧縮機の吸
入側に流入されて、該圧縮機の再起動時に、油圧縮を起
こして損傷事故を招いたりすることがあり、斯かる問題
を解決することを目的として、前記高レベル検出器を設
け、該高レベル検出器で前記油回収器内の油が高レベル
限界値以上となったとき、前記圧縮機の運転を中止させ
るのである。Furthermore, when the compressor is stopped, the on-off valve is opened, and the suction side of the compressor and the interior of the high-pressure oil recovery device are communicated with each other via the pressure equalization pipe to equalize the pressure. In such a case, if oil is stored in the oil collector to a predetermined high level limit value or higher, this oil will flow into the suction side of the compressor, and when the compressor is restarted, In order to solve this problem, the high level detector is provided, and the high level detector detects when the oil in the oil recovery device is at a high level. When the limit value is exceeded, the operation of the compressor is stopped.
（発明が解決しようとする課題）
所で、以上の冷凍２置では、前記高、低レベル検出器に
よる前記圧縮機の運転制御で、該圧縮機の確実な保護は
可能であるが、一方、前記各レベル検出器で前記油回収
器内の油面変動に対応して頻繁に圧縮機の運転を中止す
ると、二次側機器での温度分布が乱れ、例えば前記蒸発
器側から取出される冷水やブライン溶液の温度分布が乱
れるなどの問題が発生したのである。(Problems to be Solved by the Invention) In the above-mentioned two-place refrigerator, it is possible to reliably protect the compressor by controlling the operation of the compressor using the high and low level detectors, but on the other hand, If the compressor operation is frequently stopped in response to changes in the oil level in the oil recovery device by each of the level detectors, the temperature distribution in the secondary side equipment will be disturbed, and for example, the cold water taken out from the evaporator side will be disrupted. This caused problems such as the temperature distribution of the brine solution being disturbed.
本発明は以上のような間通に鑑みてなしたもので、その
目的は、高レベル検出器による圧縮機の運転中止を頻繁
に行うことなく、特定条件下においてのみ行うことによ
り、二次側機器における温度分布の乱れを低減化できる
冷凍装置を提供することにある。The present invention was made in view of the above-mentioned shortcomings, and its purpose is to prevent the secondary side from being stopped by the high level detector only under specific conditions, without having to frequently stop the compressor operation. An object of the present invention is to provide a refrigeration device that can reduce disturbances in temperature distribution in equipment.
（課題を解決するための手段）
上記目的を達成するために、本発明では、圧縮機（１）
、油回収器（２）、凝縮器（３）、膨張機構（４）及び
蒸発器（５）を順次接続し、前記油回収器（２）の上部
側と圧縮機（１）の吸入側との間に、開閉弁（６）をも
った均圧管（７）を介装した冷凍装置において、前記油
回収器（２）に留まる油の高レベル限界値を検出する高
レベル検出器（９）と、前記圧縮機（１）への吸入ガス
量を制限して、該圧縮機（１）をガス欠運転する吸入制
御手段と、前記高レベル検出器（９）で高レベルが検出
されたとき、前記吸入制御手段を介して所定時間ガス欠
運転を行うガス欠運転制御手段とを備えたことを特徴と
するものである。(Means for Solving the Problem) In order to achieve the above object, the present invention provides a compressor (1).
, an oil recovery device (2), a condenser (3), an expansion mechanism (4), and an evaporator (5) are connected in sequence, and the upper side of the oil recovery device (2) and the suction side of the compressor (1) are connected in sequence. A high level detector (9) for detecting a high level limit value of oil remaining in the oil collector (2) in a refrigeration system in which a pressure equalizing pipe (7) with an on-off valve (6) is interposed between and suction control means for limiting the amount of suction gas to the compressor (1) to operate the compressor (1) in a gas-starved manner, and when a high level is detected by the high level detector (9). and gas-starved operation control means for performing gas-starved operation for a predetermined period of time via the suction control means.
（作用）
前記油回収器（２）内での油面変動は、該油回収器（２
）内の油温に基づき、その貯油部への冷媒溶は込み量が
変化することが主な要因となって起こり、例えば油温が
高いときには、冷媒溶は込み量が小となって油面高さが
低くなり、逆に、油温か低いときには、冷媒溶は込み量
が大となって油面高さが高くなるのであり、また、油温
の低下は、主に前記圧縮機（１）の吸入ガスが極端な湿
り状態のときに起こるのである。(Function) Fluctuations in the oil level within the oil recovery device (2)
) The main factor is that the amount of refrigerant solution flowing into the oil storage section changes based on the oil temperature in When the height is low and the oil temperature is low, conversely, the amount of refrigerant solvent is large and the oil level height is high, and the decrease in oil temperature is mainly due to the compressor (1). This occurs when the inhaled gas is extremely humid.
しかして、以上の冷凍装置では、前記油回収器（２）で
の油面が所定の高レベル限界値以上にまで高くなって、
前記高レベル検出器（９）が作動されたとき、前記圧縮
機（１）は運転中止されることなく、つまり、二次側機
器での温度分布を乱したりすることなく、前記ガス欠運
転制御手段からの指令に基づき、前記吸入制御手段で前
記圧縮機（１）への吸入ガス毒が制限され、この圧縮機
（１）が所定時間にわたってガス欠運転されるのであり
、従って、斯かる圧縮機（１）のガス欠運転に伴って、
吸入ガスの湿り状態が改善されて吐出ガス温度が上昇さ
れ、前記油回収器（２）内における貯油部への冷媒溶は
込み量が少なくなり、その油面高さが低レベルとなって
、前記吸入制御手段が解除されるのであり、また、斯か
るガス欠運転を行っても、油面高さが低レベルとならな
いときに、始めて前記圧縮機（１）の運転が中止される
。However, in the above refrigeration system, the oil level in the oil recovery device (2) rises to a predetermined high level limit value or higher,
When the high level detector (9) is activated, the compressor (1) is operated without stopping, that is, without disturbing the temperature distribution in the secondary equipment. Based on the command from the control means, the suction control means limits the suction gas poisoning to the compressor (1), and the compressor (1) is operated for a predetermined period of gas starvation. With the compressor (1) running out of gas,
The wet state of the suction gas is improved, the temperature of the discharged gas is increased, the amount of refrigerant dissolved in the oil storage part in the oil recovery device (2) is reduced, and the oil level is at a low level, The suction control means is released, and the operation of the compressor (1) is stopped only when the oil level does not fall to a low level even if such gas starvation operation is performed.
（実施例）
第１図に示した冷凍装置は、モータ（１ａ）で回転駆動
されるスクリュー圧縮機（１）の冷媒吐出側に、油回収
器（２）と凝縮器（３）と膨張機構（４）及び蒸発器（
５）を順次接続して、前記圧縮機（１）から吐出される
冷媒ガスを前記油回収器（２）で油分離して、油が分離
された冷媒ガスを前記凝縮器（３）で凝縮した後に、前
記膨張機構（４）で膨張させて前記蒸発器（５）へと供
給し、該蒸発器（５）において循環される冷水やブライ
ン溶液などを冷却して蒸発し、これら溶液を冷却源とし
て使用するようにしている。(Example) The refrigeration system shown in Fig. 1 includes an oil recovery device (2), a condenser (3), and an expansion mechanism on the refrigerant discharge side of a screw compressor (1) that is rotationally driven by a motor (1a). (4) and evaporator (
5) are connected in sequence, the refrigerant gas discharged from the compressor (1) is separated from oil in the oil recovery device (2), and the refrigerant gas from which the oil has been separated is condensed in the condenser (3). After that, the expansion mechanism (4) expands the solution and supplies it to the evaporator (5), which cools and evaporates the cold water, brine solution, etc. circulated in the evaporator (5), and cools these solutions. I'm trying to use it as a source.
また、前記油回収器（２）の上部側と前記圧縮機（１）
の吸入側との間には、電磁開閉弁（６）をもった均圧管
（７）を介装させ、運転停止時に前記開閉弁（６）の開
動作で、前記均圧管（７）を介して前記油回収器（２）
側すなわち高圧側と圧縮機（１）の吸入側とを連通均圧
させるようにしている。Further, the upper side of the oil recovery device (2) and the compressor (1)
A pressure equalizing pipe (7) having an electromagnetic on-off valve (6) is interposed between the suction side of the valve and the on-off valve (6). The oil collector (2)
In other words, the high-pressure side and the suction side of the compressor (1) are communicated and pressure-equalized.
前記油回収器（２）は、前記圧縮機（１）の吐出側に接
続された油分離体（２ａ）と、その下部側に配設された
油タンク（２ｂ）とから成り、前記油分離体（２ａ）で
分離された油を前記油タンク（２ｂ）内に貯溜して、こ
の貯溜部をオイルクーラ（８）を介して前記圧縮機（１
）の軸受箇所などに給油するようにしている。The oil recovery device (2) consists of an oil separator (2a) connected to the discharge side of the compressor (1) and an oil tank (2b) disposed on the lower side of the oil separator (2a). The oil separated by the body (2a) is stored in the oil tank (2b), and this storage part is connected to the compressor (1) via the oil cooler (8).
) to supply oil to the bearings, etc.
しかして、以上の冷凍装置において、前記油回収器（２
）における油分離体（２ａ）と油タンク（２ｂ）との間
に、貯溜部の高レベル限界値を検出する高レベル検出器
（９）と、同じく低レベル限界値を検出する低レベル検
出器（１０）とをそれぞれ配設すると共に、前記圧縮機
（１）の吸入側に、吸入ガス量を制限して、該圧縮機（
１）をガス欠運転させる吸入制御手段（１１）を設ける
一方、この吸入制御手段（１１）に、前記高レベル検出
器（８）で高レベルが検出されたとき、前記圧縮機（１
）を所定時間ガス欠運転させるガス欠運転制御手段（１
２）を設けたのである。However, in the above refrigeration system, the oil recovery device (2
) between the oil separator (2a) and the oil tank (2b), there is a high level detector (9) that detects the high level limit value of the reservoir and a low level detector that also detects the low level limit value. (10), respectively, and limit the amount of suction gas on the suction side of the compressor (1).
The suction control means (11) is provided with a suction control means (11) for causing the compressor (1) to run out of gas.
) for a predetermined period of time.
2) was established.
前記吸入制御手段（１１）は、例えば、同図で示したよ
うに、前記凝縮器（３）と圧縮機（１）との間に介装さ
れる前記膨張機構（４）として電動式膨張弁（１１）を
用い、この膨張弁（１１）を前記ガス欠運転制御手段（
１２）で全閉制御するようになす。For example, as shown in the figure, the suction control means (11) may include an electric expansion valve as the expansion mechanism (4) interposed between the condenser (3) and the compressor (1). (11), the expansion valve (11) is controlled by the gas starvation operation control means (
12) to control the fully closed state.
また、第２図で明らかにしたように、前記膨張機構（４
）として、通常の感温式膨張弁を使用するときには、該
膨張弁の吸入側に電磁弁（１３）を介装させ、この電磁
弁（１３）を閉じることにより前記吸入制御手段（１１
）を構成してもよい。In addition, as shown in FIG. 2, the expansion mechanism (4
), when using a normal temperature-sensitive expansion valve, a solenoid valve (13) is installed on the suction side of the expansion valve, and by closing this solenoid valve (13), the suction control means (11
) may be configured.
次に、前記ガス欠運転制御手段（１２）による前記吸入
制御手段（１１）の制御態様を、第３図に示したフロー
チャートに基づいて説明する。Next, the manner in which the suction control means (11) is controlled by the gas starvation operation control means (12) will be explained based on the flowchart shown in FIG.
先ず、運転開始後に、前記油回収器（２）での油面が所
定の高レベル域にあるか否かが、前記高レベル検出器（
９）の動作で判断され、イエスのとき、即ち、該検出器
（９）が所定の高レベル限界値以上を検出したとき、前
記ガス欠運転制御手段（１３）から前記吸入制御手段（
１１）、例えば、第１図の電動式膨張弁（１１）や、第
２図の電磁弁（１３）に閉動作指令が出され、この後タ
イマが作動されて、該タイマがタイムアツプしたか否か
が判断され、タイムアツプするまでの時間にわたり、前
記吸入制御手段（１１）で前記圧縮機（１）への吸入ガ
ス量が制限されてガス欠運転が行われ、このガス欠運転
に伴って、前記圧縮機（１）における吸入ガスの湿り状
態が改善されて吐出ガス温度が上昇され、前記油回収器
（２）内における貯溜部への冷媒溶は込み量が少な（な
って、その油面高さが低レベルとなる。First, after the start of operation, the high level detector (
9), and when the result is YES, that is, when the detector (9) detects a predetermined high level limit value or higher, the gas starvation operation control means (13) sends the suction control means (
11) For example, a closing operation command is issued to the electric expansion valve (11) in Figure 1 or the electromagnetic valve (13) in Figure 2, and then a timer is activated, and the timer times out. The suction control means (11) limits the amount of gas sucked into the compressor (1) for a period of time until the time-up occurs, and a gas-starved operation is performed, and along with this gas-starved operation, The wet state of the suction gas in the compressor (1) is improved and the temperature of the discharged gas is increased, and the amount of refrigerant dissolved in the reservoir in the oil recovery device (2) is reduced (as a result, the oil level is reduced). The height is at a low level.
また、前記タイムアツプの判断結果がイエスの場合、即
ち、前記吸入制御手段（１１）への閉動作指令が出され
て、タイマの設定時間を経過したときに、再度前記油回
収器（２）での油面が所定の高レベル域にあるか否かが
判断され、ノーの場合、つまり、前記ガス欠運転に伴い
前記油回収器（２）での油面高さが低レベルとなったと
きには、前記吸入制御手段（１１）への閉動作指令が解
除されるのであり、また、判断結果がイエスの場合、つ
まり、以上のガス欠運転を行っても、油面高さが低レベ
ルとならないときに、始めて故障などの可能性があると
して、前記圧縮機（１）の運転が停止される。Further, if the judgment result of the time-up is YES, that is, when a closing operation command is issued to the suction control means (11) and the set time of the timer has elapsed, the oil recovery device (2) is operated again. It is determined whether the oil level in the oil recovery device (2) is within a predetermined high level range, and if the answer is no, that is, when the oil level in the oil recovery device (2) becomes a low level due to the gas starvation operation. , the closing operation command to the suction control means (11) is released, and if the judgment result is YES, that is, even if the above gas starvation operation is performed, the oil level will not fall to a low level. Sometimes, the operation of the compressor (1) is stopped for the first time due to the possibility of a failure.
（発明の効果）
以上説明したように、本発明の冷凍装置では、油回収器
（２）に留まった油の高レベル限界値を検出する高レベ
ル検出器（９）と、圧縮機（１）への吸入ガス量を制限
して、該圧縮機（１）をガス欠運転させる吸入制御手段
と、前記高レベル検出器（９）で高レベルが検出された
とき、前記吸入制御手段を介して所定時間ガス欠運転を
行うガス欠運転制御手段とを設けたから、前記高レベル
検出器（９）による前記圧縮機（１）の運転中止を頻繁
に行ったりすることなく、特定条件下においてのみ行う
ことが可能となって、例えば蒸発器（５）など二次側機
器での温度分布を均一化できるに至ったのである。(Effects of the Invention) As explained above, the refrigeration system of the present invention includes a high level detector (9) that detects the high level limit value of oil remaining in the oil recovery device (2), and a compressor (1). a suction control means for causing the compressor (1) to run out of gas by limiting the amount of suction gas into the compressor; and when a high level is detected by the high level detector (9), the suction control means Since the gas starvation operation control means is provided to perform gas starvation operation for a predetermined period of time, the operation of the compressor (1) is not frequently stopped by the high level detector (9), and is only performed under specific conditions. This has made it possible to equalize the temperature distribution in the secondary side equipment, such as the evaporator (5), for example.
第１図は本発明にかかる冷凍装置の配管図、第２図は吸
入制御手段の他実施例を示す図面、第３図は同冷凍装置
の制御態様を示すフローチャート図である。
（１） ・ Φ
（２） ・ ・
（３） ・ ・
（４） ・ ・
（５） ・ ｅ
（６） ・ ・
（７） ・ ・
（９） ・ ・
（１２） ・FIG. 1 is a piping diagram of a refrigeration system according to the present invention, FIG. 2 is a drawing showing another embodiment of the suction control means, and FIG. 3 is a flowchart showing a control mode of the refrigeration system. (1) ・ Φ (2) ・ ・ (3) ・ ・ (4) ・ ・ (5) ・ e (6) ・ ・ (7) ・ ・ (9) ・ ・ ・ (12) ・
Claims (1)
張機構（４）及び蒸発器（５）を順次接続し、前記油回
収器（２）の上部側と前記圧縮機（１）の吸入側との間
に、開閉弁（６）をもった均圧管（７）を介装した冷凍
装置において、前記油回収器（２）に留まる油の高レベ
ル限界値を検出する高レベル検出器（９）と、前記圧縮
機（１）への吸入ガス量を制限して、該圧縮機（１）を
ガス欠運転する吸入制御手段と、前記高レベル検出器（
９）で高レベルが検出されたとき、前記吸入制御手段を
介して所定時間ガス欠運転を行うガス欠運転制御手段と
を備えていることを特徴とする冷凍装置。1) A compressor (1), an oil recovery device (2), a condenser (3), an expansion mechanism (4), and an evaporator (5) are connected in sequence, and the upper side of the oil recovery device (2) and the compression device are connected in sequence. In a refrigeration system in which a pressure equalizing pipe (7) with an on-off valve (6) is interposed between the suction side of the machine (1), a high level limit value of oil remaining in the oil collector (2) is detected. a high level detector (9), a suction control means for limiting the amount of suction gas to the compressor (1) and operating the compressor (1) in a gas-starved manner;
9) When a high level is detected, the refrigeration system is characterized by comprising: gas starvation operation control means for performing gas starvation operation for a predetermined period of time via the suction control means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1002440A JPH07101129B2 (en) | 1989-01-09 | 1989-01-09 | Refrigeration equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1002440A JPH07101129B2 (en) | 1989-01-09 | 1989-01-09 | Refrigeration equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02183766A true JPH02183766A (en) | 1990-07-18 |
| JPH07101129B2 JPH07101129B2 (en) | 1995-11-01 |
Family
ID=11529333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1002440A Expired - Fee Related JPH07101129B2 (en) | 1989-01-09 | 1989-01-09 | Refrigeration equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07101129B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009257759A (en) * | 2002-04-08 | 2009-11-05 | Daikin Ind Ltd | Refrigerator |
-
1989
- 1989-01-09 JP JP1002440A patent/JPH07101129B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009257759A (en) * | 2002-04-08 | 2009-11-05 | Daikin Ind Ltd | Refrigerator |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07101129B2 (en) | 1995-11-01 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |