JP2557654B2 - Refrigeration equipment - Google Patents
Refrigeration equipmentInfo
- Publication number
- JP2557654B2 JP2557654B2 JP62194886A JP19488687A JP2557654B2 JP 2557654 B2 JP2557654 B2 JP 2557654B2 JP 62194886 A JP62194886 A JP 62194886A JP 19488687 A JP19488687 A JP 19488687A JP 2557654 B2 JP2557654 B2 JP 2557654B2
- Authority
- JP
- Japan
- Prior art keywords
- compressor
- evaporator
- temperature
- fan
- stopped
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Air Conditioning Control Device (AREA)
Description
【発明の詳細な説明】 （イ） 産業上の利用分野 本発明はショーケース等の冷却機、及び空気調和機に
利用される冷凍装置に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a refrigerating apparatus used for a cooler such as a showcase and an air conditioner.
（ロ） 従来の技術 冷凍装置の蒸発器が凍結すると、蒸発器の熱交換能力
が著しく低下するため、特開昭57−192752号公報で提示
されているように、蒸発器の温度を検出し、この温度が
蒸発器に霜が生じる温度以下となった時に圧縮機の能力
を下げていた。(B) Prior art Since the heat exchange capacity of the evaporator is significantly reduced when the evaporator of the refrigeration system freezes, the temperature of the evaporator cannot be detected as disclosed in JP-A-57-192752. , When the temperature became below the temperature at which frost was formed on the evaporator, the capacity of the compressor was lowered.
（ハ） 発明が解決しようとする問題点 圧縮機の能力を最低まで下げても蒸発器の凍結を防止
できない場合があり、この時には圧縮機を停止させるよ
うにした。そして、凍結の原因（冷媒ガスの不足やフィ
ルターの目詰まり等）をチェックした後、運転スイッチ
を手動操作して再運転させており、操作が面倒であっ
た。(C) Problems to be solved by the invention Even if the capacity of the compressor is lowered to the minimum, it may not be possible to prevent freezing of the evaporator. At this time, the compressor is stopped. Then, after checking the cause of freezing (insufficient refrigerant gas, clogging of the filter, etc.), the operation switch was manually operated to restart the operation, which was troublesome.
本発明はかかる操作をできるだけ少なくした冷凍装置
を提供するものである。The present invention provides a refrigerating apparatus in which such operations are minimized.
（ニ） 問題点を解決するための手段 本発明は冷凍装置の制御器に、蒸発器の温度またはこ
れに相当する冷媒圧力を検出する手段と、この検出手段
の検出温度（圧力）が設定値以下となった時に圧縮機の
運転を停止する手段と、この運転の停止が蒸発器のファ
ンの低速運転中に行なわれた時には圧縮機の運転停止か
ら所定時間経過後にこの圧縮機の運転を再開させる手段
とを設けるようにしたものである。(D) Means for Solving Problems The present invention provides a controller of a refrigerating apparatus for detecting a temperature of an evaporator or a refrigerant pressure corresponding thereto, and a temperature (pressure) detected by the detecting means is a set value. A means for stopping the operation of the compressor when the following occurs, and restarting the operation of the compressor after a predetermined time has elapsed after the operation of the compressor was stopped when the operation was stopped during the low speed operation of the evaporator fan. And a means for causing it to be provided.
（ホ） 作用 蒸発器の温度（冷媒圧力）が設定値以下になると圧縮
機が停止するが、この停止する時に蒸発器のファンが高
速と低速のどちらで運転されていたか判別しておく。そ
して、ファンが高速運転されていた場合はこの運転によ
り蒸発圧力が高められていても蒸発器が凍結するのは冷
媒ガスが不足したり、エアーフィルターが目詰まりして
いる等の異常状態に陥っていると見なし、凍結の原因を
サービス点検した後、運転スイッチを再投入して再運転
を開始する。(E) Action The compressor stops when the temperature of the evaporator (refrigerant pressure) falls below the set value. At this time, it is determined whether the fan of the evaporator was operating at high speed or low speed. If the fan is operating at high speed, even if the evaporation pressure is increased by this operation, the evaporator freezes because of a shortage of refrigerant gas or an abnormal condition such as clogging of the air filter. After servicing the cause of the freeze, restart the operation by turning on the operation switch again.
一方、ファンが低速運転していた場合は蒸発圧力が低
下して凍結し易い状態になっているだけであり、異常な
状態に陥っていないと見なして圧縮機は、その運転停止
から所定時間経過後に運転が再開される。On the other hand, when the fan is operating at a low speed, the evaporation pressure decreases and it is in a state where it easily freezes. The operation will be resumed later.
（ヘ） 実施例 第１図は本発明装置の実施例を示す冷媒回路図で、印
加される電源の周波数で能力が変わる能力可変型圧縮機
（１）と凝縮器（２）と減圧素子（３）と蒸発器（４）
とが順次環状に接続されている。(F) Embodiment FIG. 1 is a refrigerant circuit diagram showing an embodiment of the device of the present invention, in which a variable capacity compressor (1), a condenser (2), and a pressure reducing element (the capacity of which changes depending on the frequency of an applied power source) 3) and evaporator (4)
And are sequentially connected in a ring shape.
（５）は圧縮機（１）と蒸発器（４）のファン（６）
とを運転制御する制御器で、蒸発器（４）で冷やされる
被調和室（７）の温度を室温センサー（８）で検出して
この検出温度と設定温度との温度差に応じて圧縮機
（１）に印加する電源の周波数を変える能力可変手段
（９）と、ファン（６）の運転手段（10）と、センサー
（11）により蒸発器（４）の温度を検出する手段（12）
と、この検出手段の検出温度が設定値０℃以下となった
時に圧縮機（１）の運転を停止する手段（13）と、この
運転の停止がファン（６）の低速運転中に行なわれた時
には圧縮機（１）を自動的に再運転させる手段（14）と
が設けられている。(5) is a fan (6) for the compressor (1) and the evaporator (4)
Is a controller for operating and controlling the temperature of the room to be conditioned (7) cooled by the evaporator (4) by the room temperature sensor (8), and the compressor according to the temperature difference between the detected temperature and the set temperature. Ability varying means (9) for changing the frequency of the power source applied to (1), an operating means (10) for the fan (6), and means (12) for detecting the temperature of the evaporator (4) by a sensor (11).
And a means (13) for stopping the operation of the compressor (1) when the temperature detected by the detecting means falls below a set value of 0 ° C., and this operation is stopped during the low speed operation of the fan (6). In this case, means (14) for automatically restarting the compressor (1) is provided.
本発明装置は以上の如く構成されており、圧縮機
（１）より吐出された冷媒が凝縮器（２）−減圧素子
（３）−蒸発器（４）を経て圧縮機（１）に戻る冷凍サ
イクルが形成されて被調和室（７）が冷やされる。かか
る運転中、顧客が設定した設定温度と室温センサー
（８）で検出される被調和室（７）内の温度とを比較
し、この温度差が大きいと能力可変手段（９）から圧縮
機（１）に印加する電源の周波数を高くして圧縮機
（１）が高能力で運転され、逆に温度差が小さいと能力
可変手段（９）から圧縮機（１）に印加する電源の周波
数を低くして圧縮機（１）が低能力で運転されている。The device of the present invention is configured as described above, and the refrigerant discharged from the compressor (1) returns to the compressor (1) via the condenser (2) -pressure reducing element (3) -evaporator (4). A cycle is formed and the conditioned room (7) is cooled. During such operation, the set temperature set by the customer is compared with the temperature in the room to be conditioned (7) detected by the room temperature sensor (8). If this temperature difference is large, the capacity varying means (9) causes the compressor ( When the compressor (1) is operated with high capacity by increasing the frequency of the power source applied to (1), and conversely the temperature difference is small, the frequency of the power source applied from the capacity varying means (9) to the compressor (1) is changed. Lowering the compressor (1) is operating at low capacity.
かかる運転中、蒸発器（４）の温度が設定値（０℃）
以下に低下すると、検出手段（12）から発せられるセン
サー（11）からの検出信号を停止手段（13）が受けて圧
縮機（１）の運転が停止すると共にこの停止する時にフ
ァン（６）が高速と低速のどちらで運転されていたかを
判別しておく。そして、ファン（６）が高速運転されて
いた場合はこの運転により蒸発圧力が高められていても
蒸発器（４）が凍結するのは冷媒ガスが不足したり、エ
アーフィルターが目詰まりしている等の異常状態に陥っ
ていると見なして警報が発せられる。この警報に従い、
冷媒ガスの充填量のチェックやエアーフィルターの清掃
等、凍結の原因をサービス点検した後、運転スイッチを
再投入することにより再運転が開始される。During such operation, the temperature of the evaporator (4) is the set value (0 ° C)
When it decreases below, the stop means (13) receives the detection signal from the sensor (11) emitted from the detection means (12), the operation of the compressor (1) is stopped, and the fan (6) is stopped when this operation is stopped. Determine whether you were driving at high speed or low speed. When the fan (6) is operating at high speed, the evaporator (4) freezes even if the evaporation pressure is increased by this operation because the refrigerant gas is insufficient or the air filter is clogged. An alarm is issued on the assumption that it has fallen into an abnormal state such as. According to this alert,
After checking the cause of freezing, such as checking the filling amount of the refrigerant gas and cleaning the air filter, restart the operation by turning on the operation switch again.
一方、ファン（６）が低速運転していた場合は蒸発圧
力が低下して凍結し易い状態になっているだけであり、
異常な状態に陥っていないと見なして圧縮機（１）は再
起動防止用タイマーで３分間停止維持された後に（所定
時間経過後に）、この圧縮機（１）の運転が再開され
る。On the other hand, when the fan (6) is operating at a low speed, the evaporation pressure is lowered and it is easy to freeze.
The compressor (1) is considered to have not fallen into an abnormal state and is stopped and maintained for 3 minutes by the restart prevention timer (after a predetermined time has elapsed), and then the operation of the compressor (1) is restarted.
尚、上記実施例では印加される電源周波数で能力が変
わる圧縮機（１）を用いたが、アンローダ機構や極数変
換機構で能力が変わる圧縮機を用いても良く、又、能力
が変わらない圧縮機を用いても良い。Although the compressor (1) whose capacity changes depending on the applied power frequency is used in the above embodiment, a compressor whose capacity changes with an unloader mechanism or a pole number conversion mechanism may be used, or the capacity does not change. A compressor may be used.
又、蒸発器（４）の温度を検出する代わりにこの温度
に相当する冷媒圧力を検出しても良い。Further, instead of detecting the temperature of the evaporator (4), the refrigerant pressure corresponding to this temperature may be detected.
（ト） 発明の効果 本発明によれば、蒸発器の温度（冷媒圧力）が凍結温
度まで下がって圧縮機が停止する時、蒸発器のファンが
高速で運転されている場合は冷凍装置が異常状態にある
と見なして再運転は手動操作で行なわせ、一方、ファン
が低速で運転されている場合は異常状態にないとみなし
て、所定時間経過後にこの圧縮機の運転が再開されるの
で、凍結防止のために圧縮機が停止すると必ず手動操作
で再運転していた従来装置と比較して不必要なサービス
点検がなくなり、操作性を向上させることができる。According to the present invention, when the evaporator temperature (refrigerant pressure) drops to the freezing temperature and the compressor stops, the refrigeration system is abnormal if the evaporator fan is operating at high speed. Assuming that it is in a state, restarting is performed manually, while if the fan is operating at a low speed, it is considered that it is not in an abnormal state, and the operation of this compressor is restarted after a predetermined time, When the compressor is stopped to prevent freezing, unnecessary service inspection is eliminated as compared with the conventional device that is always restarted by manual operation, and operability can be improved.
図面は本発明の実施例を示すもので、第１図は冷凍装置
の冷媒回路図、第２図は冷凍装置の運転動作を示すフロ
ーチャートである。 （１）……圧縮機、（２）……凝縮器、（３）……減圧
素子、（４）……蒸発器、（５）……制御器、（６）…
…ファン、（12）……検出手段、（13）……圧縮機停止
手段、（14）……再運転手段。The drawings show an embodiment of the present invention. FIG. 1 is a refrigerant circuit diagram of a refrigerating apparatus, and FIG. 2 is a flow chart showing an operating operation of the refrigerating apparatus. (1) ... compressor, (2) ... condenser, (3) ... decompression element, (4) ... evaporator, (5) ... controller, (6) ...
… Fan, (12) …… Detecting means, (13) …… Compressor stopping means, (14) …… Restarting means.
Claims (2)
次環状に接続した冷媒回路と、圧縮機と凝縮器のファン
とを運転制御する制御器とを備えた冷凍装置において、
蒸発器の温度またはこれに相当する冷媒圧力を検出する
手段と、この検出手段の検出温度（圧力）が設定値以下
となった時に圧縮機の運転を停止する手段と、この運転
の停止が前記ファンの低速運転中に行なわれた時には前
記圧縮機の運転停止から所定時間経過後にこの圧縮機の
運転を再開させる手段とを前記制御器に設けたことを特
徴とする冷凍装置。1. A refrigeration system comprising a refrigerant circuit in which a compressor, a condenser, a decompression element and an evaporator are sequentially connected in an annular shape, and a controller for controlling the operation of the compressor and the fan of the condenser.
A means for detecting the temperature of the evaporator or a refrigerant pressure corresponding thereto, a means for stopping the operation of the compressor when the temperature (pressure) detected by the detecting means becomes a set value or less, and the stop of the operation is A refrigerating apparatus, wherein the controller is provided with means for restarting the operation of the compressor after a predetermined time has elapsed since the operation of the compressor was stopped when the fan was operated at a low speed.
の範囲第１項記載の冷凍装置。2. The refrigerating apparatus according to claim 1, wherein the compressor is a variable capacity compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62194886A JP2557654B2 (en) | 1987-08-04 | 1987-08-04 | Refrigeration equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62194886A JP2557654B2 (en) | 1987-08-04 | 1987-08-04 | Refrigeration equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6438564A JPS6438564A (en) | 1989-02-08 |
| JP2557654B2 true JP2557654B2 (en) | 1996-11-27 |
Family
ID=16331959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62194886A Expired - Fee Related JP2557654B2 (en) | 1987-08-04 | 1987-08-04 | Refrigeration equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2557654B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100638922B1 (en) * | 2004-12-30 | 2006-10-26 | 엘지전자 주식회사 | Controlling apparatus of a wine cellar and controlling method of the same |
| GB2562654A (en) * | 2016-02-22 | 2018-11-21 | Mitsubishi Electric Corp | Air conditioning device |
-
1987
- 1987-08-04 JP JP62194886A patent/JP2557654B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6438564A (en) | 1989-02-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6276450B1 (en) | Air conditioner | |
| JP2557654B2 (en) | Refrigeration equipment | |
| JPH0498059A (en) | Detecting device for freezing in evaporator of refrigerating plant | |
| JPH04268179A (en) | Device for control of defrosting of air conditioner | |
| JPS63101646A (en) | Freezer | |
| JPH0719617A (en) | Air current velocity adjusting device of condenser fan | |
| JP2005114194A (en) | Low temperature storage shed | |
| JPH0712850Y2 (en) | Clogging detection device for air-cooled condenser | |
| KR100231191B1 (en) | Method for defrosting in a refrigerator | |
| JP2001153505A (en) | Turbo refrigerating machine maintaining device | |
| KR100231190B1 (en) | Defrost control method for a refrigerator | |
| KR0114920Y1 (en) | Protection apparatus for the compressor of an air-conditioning system | |
| JP3903237B2 (en) | Cold storage | |
| JPS6252225B2 (en) | ||
| JPH09113002A (en) | Air conditioner | |
| KR100221879B1 (en) | Defrost control method for a refrigerator | |
| JP2711820B2 (en) | Air compressor and refrigeration air dryer | |
| JPH0743026A (en) | Freezer device | |
| KR19980014435A (en) | Rapid freezing device and method of refrigerator | |
| JP4131619B2 (en) | Outdoor fan control method and apparatus for air conditioner and air conditioner | |
| JP3301809B2 (en) | Ice machine | |
| JPH0533988A (en) | Operation controller for air conditioner | |
| JPS60133249A (en) | Defrosting-controlling method for air conditioner | |
| JPH02115652A (en) | Frost preventing method for refrigerator | |
| JPH0571858A (en) | Refrigerator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |