JPH0921570A - Refrigerator and operation control system therefor - Google Patents
Refrigerator and operation control system thereforInfo
- Publication number
- JPH0921570A JPH0921570A JP7169927A JP16992795A JPH0921570A JP H0921570 A JPH0921570 A JP H0921570A JP 7169927 A JP7169927 A JP 7169927A JP 16992795 A JP16992795 A JP 16992795A JP H0921570 A JPH0921570 A JP H0921570A
- Authority
- JP
- Japan
- Prior art keywords
- refrigerant
- refrigeration system
- blower
- condenser
- pressure
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/11—Fan speed control
- F25B2600/111—Fan speed control of condenser fans
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/027—Condenser control arrangements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- Air Conditioning Control Device (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、空気冷却方式によ
り冷媒を凝縮させる送風機付き凝縮器を有する冷凍装置
及びその運転制御方式に関し、特に、複数種類の冷媒に
対応し、かつ安定した運転を行なうことができる冷凍装
置及びその運転制御方式に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerating apparatus having a condenser with a blower for condensing a refrigerant by an air cooling method and an operation control method thereof, and particularly to a plurality of kinds of refrigerants and performing stable operation. The present invention relates to a refrigerating device and an operation control method thereof.
【０００２】[0002]
【従来の技術】従来技術として、例えば、特開平１−２
７３９５４号公報に開示されているように、高圧圧力と
設定値との関係に応じて、凝縮器用送風機の回転数を増
減して、高圧圧力を設定値に収束保持することにより、
外気温度が低い場合の異常圧力低下、外気温度が高い場
合の異常圧力上昇を防止し、外気温度が変化しても冷凍
装置として安定した連続運転を行なっている例が知られ
ている。2. Description of the Related Art As a conventional technique, for example, Japanese Patent Laid-Open No. 1-22
As disclosed in Japanese Patent No. 73954, by increasing or decreasing the number of revolutions of the condenser blower according to the relationship between the high pressure and the set value, the high pressure is converged and held at the set value.
An example is known in which an abnormal pressure drop when the outside air temperature is low and an abnormal pressure increase when the outside air temperature is high are prevented, and stable and continuous operation is performed as a refrigeration system even when the outside air temperature changes.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、前述の
従来の冷凍装置では、単一種類の冷媒において最適な、
高圧圧力制御を行なうものであり、この冷媒以外の種類
の冷媒を冷凍装置に封入し、運転しようとする場合につ
いて何ら考慮されていなかった。これにより、他種類の
冷媒を冷凍装置に封入運転した場合、凝縮機の高圧圧力
の異常上昇、あるいは異常低下という問題があった。However, in the above-mentioned conventional refrigerating apparatus, the optimum refrigeration for a single type of refrigerant is
High-pressure control is performed, and no consideration has been given to the case where a refrigerant other than this refrigerant is sealed in the refrigerating apparatus to start operation. Therefore, when another type of refrigerant is charged into the refrigeration system, there is a problem that the high pressure of the condenser is abnormally increased or decreased.
【０００４】そこで、本発明は、上記のような問題を解
決し、複数種類の冷媒に対応可能でかつ、それぞれの冷
媒を封入時に、安定した最適な高圧圧力制御を行なうこ
とができる冷凍装置及びその運転制御方式を提供するこ
とを目的とする。Therefore, the present invention solves the above-mentioned problems and is capable of dealing with a plurality of types of refrigerants, and is capable of performing stable and optimum high-pressure control at the time of charging each refrigerant. It is intended to provide the operation control system.
【０００５】[0005]
【課題を解決するための手段】本発明は、圧縮機、送風
機付凝縮器、受液器、膨張弁及び蒸発器を有してなる冷
凍サイクルを備え、前記圧縮機、凝縮器、受液器をキャ
ビネット内に納めるとともに、前記キャビネットを屋外
に設置する冷凍装置において、凝縮液圧力を検出する圧
力センサと、凝縮液温度を検出する温度センサと、前記
圧力センサ及び温度センサのそれぞれの検出値に応じ
て、冷凍装置の運転状態を制御するコントローラとを有
し、前記コントローラは、複数種類の冷媒の物性値が予
め入力されており、冷凍装置運転開始後のある一定時間
の圧力センサ及び温度センサ検出値に基づいて、冷凍装
置内に封入されている冷媒の種類を推定し、前記送風機
をその冷媒に応じた特性に制御することを特徴とする。The present invention comprises a refrigeration cycle having a compressor, a condenser with a blower, a liquid receiver, an expansion valve and an evaporator, the compressor, the condenser and the liquid receiver. In a refrigerating device that installs the cabinet in the cabinet outdoors, a pressure sensor that detects the condensate pressure, a temperature sensor that detects the condensate temperature, and a detection value for each of the pressure sensor and the temperature sensor. Accordingly, a controller for controlling the operating state of the refrigerating machine is provided, and the controller has physical property values of a plurality of types of refrigerant input in advance, and the pressure sensor and the temperature sensor for a certain period of time after the refrigerating machine operation is started. The type of the refrigerant enclosed in the refrigeration system is estimated based on the detected value, and the blower is controlled to have characteristics according to the refrigerant.
【０００６】[0006]
【作用】本発明に係る冷凍装置及びその運転制御方式に
おいて、例えば運転開始信号が発生するとこれと同期し
て液電磁弁が開き、冷凍装置が運転を開始し、空冷式凝
縮器を備えた冷凍装置の場合、凝縮器用送風機回転数を
凝縮液圧力又は温度により凝縮圧力制御を行なってい
る。In the refrigerating apparatus and the operation control system thereof according to the present invention, for example, when an operation start signal is generated, the liquid solenoid valve is opened in synchronization with this signal, the refrigerating apparatus starts operation, and a refrigerating apparatus equipped with an air-cooled condenser is provided. In the case of the device, the condensing pressure is controlled by controlling the number of revolutions of the blower for the condenser depending on the condensate pressure or the temperature.
【０００７】ここで、本発明に係る冷凍装置は、複数の
冷媒に対応可能であるのでそれぞれの冷媒に応じた凝縮
器用送風機回転数制御を行なう必要がある。このため、
冷凍装置運転開始後の一定時間、凝縮器用送風機回転数
を予め設定された基本となる冷媒の回転数制御特性にて
制御し、この間に凝縮液圧力及び温度をそれぞれ圧力セ
ンサ及び温度センサにて検出し、この値とコントローラ
内に予め入力してある複数の冷媒物性値と比較し、冷凍
装置内に封入されている冷媒を推定する。そしてこの推
定された冷媒が、予め設定された基本となる冷媒と異な
る場合は、回転数制御特性を一定時間経過後変更し、凝
縮器用送風機の回転数制御を行なう。Since the refrigerating apparatus according to the present invention can handle a plurality of refrigerants, it is necessary to control the speed of the blower for the condenser according to each refrigerant. For this reason,
For a certain period of time after the start of the operation of the refrigeration system, the rotation speed of the blower for the condenser is controlled by the preset rotation speed control characteristics of the refrigerant, and the pressure and temperature of the condensate are detected during this period, respectively. Then, this value is compared with a plurality of refrigerant physical property values that are input in advance in the controller to estimate the refrigerant enclosed in the refrigeration system. When the estimated refrigerant is different from the preset basic refrigerant, the rotation speed control characteristic is changed after a certain period of time to control the rotation speed of the condenser blower.
【０００８】これにより、冷凍装置の凝縮圧力を使用冷
媒に関係なく安定し、制御することが可能となる。This makes it possible to stabilize and control the condensation pressure of the refrigeration system regardless of the refrigerant used.
【０００９】[0009]
【発明の実施の形態】以下、本発明の実施の形態につい
て図面を参照して説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.
【００１０】図１は、本発明の実施の形態に係る冷凍装
置を示す冷凍サイクル系統図である。本冷凍装置は、圧
縮機１、空気冷却式の凝縮器２、受液器３、膨張弁４及
び蒸発器５、液電磁弁６を有してなる冷凍サイクルを備
えている。ここで、圧縮機１、凝縮器２及び受液器３は
キャビネット１１内に納めており、このキャビネット１
１を屋外に設置している。FIG. 1 is a refrigeration cycle system diagram showing a refrigeration system according to an embodiment of the present invention. This refrigeration system includes a refrigeration cycle including a compressor 1, an air-cooled condenser 2, a liquid receiver 3, an expansion valve 4, an evaporator 5, and a liquid solenoid valve 6. Here, the compressor 1, the condenser 2, and the liquid receiver 3 are housed in a cabinet 11.
1 is installed outdoors.
【００１１】さらに、本冷凍装置は、凝縮器２の出口部
の凝縮液圧力を検出する圧力センサ７と、該センサと同
部に配設され凝縮液温度を検出する温度センサ８と、圧
力センサ７及び温度センサ８の検出値に応じて冷凍装置
の運転状態、特に凝縮器用送風機１０の回転数を制御す
るコントローラ９とを有している。温度センサ８として
は、例えばサーミスタが使用される。Further, the present refrigerating apparatus has a pressure sensor 7 for detecting the pressure of the condensate at the outlet of the condenser 2, a temperature sensor 8 arranged at the same part as the sensor for detecting the temperature of the condensate, and a pressure sensor. 7 and a controller 9 for controlling the operating state of the refrigeration system, in particular, the number of revolutions of the condenser blower 10 according to the detection values of the temperature sensor 8 and the temperature sensor 8. As the temperature sensor 8, for example, a thermistor is used.
【００１２】前記コントローラ９は、ＣＰＵ、メモリ
ー、制御手段等を有し、該メモリーに複数種類の冷媒の
物性値が入力記憶されており、該物性値は例えば図２に
示す様な凝縮温度と凝縮液圧力の相関関係（例Ａ、Ｂ、
Ｃ）である。ＣＰＵでは圧力センサ７及び温度センサ８
の検出値と前記入力された物性値を比較して冷凍装置内
に封入されている冷媒の種類を判断推定し、さらにその
推定された冷媒の種類に応じ図３に示す凝縮器用送風機
１０の回転数制御特性の制御信号を出力し、該信号に基
づき制御手段は該送風機を推定冷媒に最適な特性に制御
する。The controller 9 has a CPU, a memory, a control means, etc., and the physical property values of a plurality of kinds of refrigerants are input and stored in the memory. The physical property values are, for example, the condensation temperature as shown in FIG. Condensate pressure correlation (eg A, B,
C). In the CPU, the pressure sensor 7 and the temperature sensor 8
Of the refrigerant enclosed in the refrigerating apparatus is judged and estimated by comparing the detected value of 1) with the inputted physical property value, and the rotation of the condenser blower 10 shown in FIG. 3 is further determined according to the estimated refrigerant type. A control signal having a number control characteristic is output, and based on the signal, the control means controls the blower to have an optimal characteristic for the estimated refrigerant.
【００１３】次に、本冷凍装置の動作について説明す
る。図４は、本冷凍装置の運転制御方式を示すフローチ
ャートである。これに従い制御動作を説明する。Next, the operation of this refrigeration system will be described. FIG. 4 is a flowchart showing the operation control method of the present refrigeration system. The control operation will be described accordingly.
【００１４】冷凍装置は、運転開始信号により液電磁弁
６が開き、圧縮機１が運転を開始する。運転開始後、コ
ントローラ９にて予め設定された一定時間内は、冷媒Ａ
（図２）に相当する凝縮器用送風機１０の回転数制御特
性Ｐ（図３）にて、凝縮圧力制御を行う。さらに、この
一定時間内に、圧力センサ７及び温度センサ８にて凝縮
液圧力及び温度を検出し、この値と、コントローラ９に
予め入力されている冷媒（Ａ、Ｂ、Ｃ・・・）の物性値
とを比較し、冷凍装置に封入されている冷媒を推定す
る。In the refrigeration system, the liquid solenoid valve 6 is opened by the operation start signal, and the compressor 1 starts operating. After the start of operation, the refrigerant A is kept for a certain period of time preset by the controller 9.
Condensation pressure control is performed with the rotational speed control characteristic P (FIG. 3) of the condenser blower 10 corresponding to (FIG. 2). Further, within this fixed time, the pressure sensor 7 and the temperature sensor 8 detect the pressure and temperature of the condensate, and this value and the refrigerant (A, B, C ...) Pre-input to the controller 9 are detected. The refrigerant enclosed in the refrigeration system is estimated by comparing the physical property values.
【００１５】推定された冷媒が冷媒Ａの場合は、一定時
間経過後も初期設定回転数特性Ｐにて、凝縮圧力制御を
行なう。When the estimated refrigerant is the refrigerant A, the condensing pressure control is performed with the initial setting rotational speed characteristic P even after a certain period of time.
【００１６】次に、推定された冷媒が冷媒Ｂの場合は、
コントローラ９にて、予め設定された凝縮液温度ａでの
冷媒Ａ、Ｂの凝縮液圧力ＰA 、ＰB を比較し、△Ｐ1 ＝
ＰA−ＰB を算出する。さらに、凝縮器用送風機１０の
回転数制御特性Ｐを、回転数制御特性Ｑ＝Ｐ＋△Ｐ1 に
変更し、凝縮圧力制御を行なう。その他の冷媒Ｃなどに
ついても同様に制御を行なう。Next, when the estimated refrigerant is refrigerant B,
In the controller 9, the condensate pressures P A and P B of the refrigerants A and B at the preset condensate temperature a are compared, and ΔP 1 =
Calculate P A -P B. Further, the rotation speed control characteristic P of the condenser blower 10 is changed to the rotation speed control characteristic Q = P + ΔP 1 to control the condensation pressure. The other refrigerant C and the like are similarly controlled.
【００１７】上記実施の形態では、冷凍装置に封入され
ている冷媒の種類の相違に影響されることなく、常に安
定した冷凍装置の運転制御を行なうことができる。In the above-described embodiment, stable operation control of the refrigeration system can always be performed without being affected by the difference in the types of refrigerants enclosed in the refrigeration system.
【００１８】[0018]
【発明の効果】以上説明したように本発明によれば、冷
凍装置に使用される冷媒の種類に応じて、凝縮器用送風
機回転数制御を変更することにより、それぞれの冷媒に
て、安定した凝縮圧力制御を行なうことができる。As described above, according to the present invention, the condenser blower rotation speed control is changed according to the type of the refrigerant used in the refrigeration system, so that stable condensation is achieved with each refrigerant. Pressure control can be performed.
【図１】本発明の実施の形態に係る冷凍装置を示す冷凍
サイクル系統図である。FIG. 1 is a refrigeration cycle system diagram showing a refrigeration apparatus according to an embodiment of the present invention.
【図２】本発明の実施の形態に係る冷凍装置制御コント
ローラに入力されている冷媒物性値である。FIG. 2 is a refrigerant physical property value input to the refrigeration apparatus controller according to the embodiment of the present invention.
【図３】本発明の実施の形態に係る冷凍装置の凝縮器用
送風機回転数制御特性図である。FIG. 3 is a characteristic diagram of a blower rotation speed control characteristic for a condenser of a refrigerating apparatus according to an embodiment of the present invention.
【図４】本発明の実施の形態に係る冷凍装置の運転制御
方式を示すフローチャートである。FIG. 4 is a flowchart showing an operation control system of the refrigerating apparatus according to the embodiment of the present invention.
１…圧縮機 ２…凝縮器 ３…受液器 ４…膨張弁 ５…蒸発器 ６…液電磁弁 ７…圧力センサ ８…温度セン
サ ９…コントローラ １０…送風機 １１…キャビネットDESCRIPTION OF SYMBOLS 1 ... Compressor 2 ... Condenser 3 ... Liquid receiver 4 ... Expansion valve 5 ... Evaporator 6 ... Liquid solenoid valve 7 ... Pressure sensor 8 ... Temperature sensor 9 ... Controller 10 ... Blower 11 ... Cabinet
フロントページの続き (72)発明者 平岡清司 静岡県清水市村松390番地 株式会社日立 製作所空調システム事業部内Front Page Continuation (72) Inventor Kiyoshi Hiraoka 390 Muramatsu, Shimizu City, Shizuoka Prefecture Hitachi Ltd. Air Conditioning Systems Division
Claims (2)
弁及び蒸発器を有してなる冷凍サイクルを備え、前記圧
縮機、凝縮器、受液器をキャビネット内に納めるととも
に、前記キャビネットを屋外に設置する冷凍装置におい
て、凝縮液圧力を検出する圧力センサと、凝縮液温度を
検出する温度センサと、前記圧力センサ及び温度センサ
のそれぞれの検出値に応じて、冷凍装置の運転状態を制
御するコントローラとを有し、前記コントローラは、複
数種類の冷媒の物性値が予め入力されており、冷凍装置
運転開始後のある一定時間の圧力センサ及び温度センサ
検出値に基づいて、冷凍装置内に封入されている冷媒の
種類を推定し、前記送風機をその冷媒に応じた特性に制
御することを特徴とする冷凍装置。1. A refrigeration cycle comprising a compressor, a condenser with an air blower, a liquid receiver, an expansion valve and an evaporator, and the compressor, the condenser and the liquid receiver are housed in a cabinet, and In a refrigeration system in which a cabinet is installed outdoors, a pressure sensor that detects the pressure of the condensate, a temperature sensor that detects the temperature of the condensate, and the operating state of the refrigeration system according to the respective detection values of the pressure sensor and the temperature sensor. And a controller for controlling the refrigerating apparatus, in which the physical property values of a plurality of types of refrigerants are input in advance, and based on the pressure sensor and temperature sensor detection values for a certain period of time after the start of the refrigerating apparatus operation. A refrigerating apparatus which estimates the type of a refrigerant enclosed in the inside and controls the blower to have characteristics according to the refrigerant.
装置運転開始時から、所定時間内の圧力センサ及び温度
センサ検出値と、複数の冷媒物性値とを比較し、冷凍装
置内に封入されている冷媒を推定し、さらに送風機をそ
の冷媒に最適な特性に制御することを特徴とする冷凍装
置の運転制御方式。2. The refrigeration system according to claim 1, wherein the pressure sensor and temperature sensor detection values within a predetermined time from the start of the refrigeration system operation are compared with a plurality of refrigerant physical property values, and the refrigerant is enclosed in the refrigeration system. An operation control system for a refrigeration system, which estimates the refrigerant that is operating and further controls the blower to have optimum characteristics for the refrigerant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7169927A JPH0921570A (en) | 1995-07-05 | 1995-07-05 | Refrigerator and operation control system therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7169927A JPH0921570A (en) | 1995-07-05 | 1995-07-05 | Refrigerator and operation control system therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0921570A true JPH0921570A (en) | 1997-01-21 |
Family
ID=15895526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7169927A Pending JPH0921570A (en) | 1995-07-05 | 1995-07-05 | Refrigerator and operation control system therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0921570A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017138058A1 (en) * | 2016-02-08 | 2017-08-17 | 三菱電機株式会社 | Refrigeration device |
| JP2019002620A (en) * | 2017-06-14 | 2019-01-10 | 日立ジョンソンコントロールズ空調株式会社 | Air conditioner |
-
1995
- 1995-07-05 JP JP7169927A patent/JPH0921570A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017138058A1 (en) * | 2016-02-08 | 2017-08-17 | 三菱電機株式会社 | Refrigeration device |
| JPWO2017138058A1 (en) * | 2016-02-08 | 2018-09-06 | 三菱電機株式会社 | Refrigeration apparatus and control apparatus for refrigeration apparatus |
| GB2562639A (en) * | 2016-02-08 | 2018-11-21 | Mitsubishi Electric Corp | Refrigeration device |
| US20190113264A1 (en) * | 2016-02-08 | 2019-04-18 | Mitsubishi Electric Corporation | Refrigeration device and controller for refrigeration device |
| US10845108B2 (en) | 2016-02-08 | 2020-11-24 | Mitsubishi Electric Corporation | Refrigeration device and controller for refrigeration device |
| GB2562639B (en) * | 2016-02-08 | 2021-02-17 | Mitsubishi Electric Corp | Refrigeration device and controller for refrigeration device |
| JP2019002620A (en) * | 2017-06-14 | 2019-01-10 | 日立ジョンソンコントロールズ空調株式会社 | Air conditioner |
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