JPS62178854A - Refrigerator - Google Patents

Refrigerator

Info

Publication number
JPS62178854A
JPS62178854A JP2062286A JP2062286A JPS62178854A JP S62178854 A JPS62178854 A JP S62178854A JP 2062286 A JP2062286 A JP 2062286A JP 2062286 A JP2062286 A JP 2062286A JP S62178854 A JPS62178854 A JP S62178854A
Authority
JP
Japan
Prior art keywords
refrigerant
condensing pressure
air
regulating valve
pressure regulating
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
Application number
JP2062286A
Other languages
Japanese (ja)
Inventor
浦川 秀則
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP2062286A priority Critical patent/JPS62178854A/en
Publication of JPS62178854A publication Critical patent/JPS62178854A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00Arrangement or mounting of control or safety devices
    • F25B49/02Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/027Condenser control arrangements

Landscapes

  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。
(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、冷凍運転時に冷却能力の向上と所要電力の
低減を期するようにした冷凍装置に関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a refrigeration system designed to improve cooling capacity and reduce required power during refrigeration operation.

〔従来の技術〕[Conventional technology]

第2図はたとえば、[サギノミャ冷凍冷房用自動制御機
器カタログP20J  (1981年1月10日発行)
に示された従来の冷凍装置の要部冷媒系統図である。
Figure 2 shows, for example, [Saginomya Refrigeration and Cooling Automatic Control Equipment Catalog P20J (published January 10, 1981)
FIG. 2 is a refrigerant system diagram of main parts of the conventional refrigeration system shown in FIG.

この第2図において、1は冷媒圧縮機、2は空冷凝縮器
であり、冷媒圧縮機1と空冷凝縮器2は冷媒ガス管3で
接続されており、この空冷凝縮器2に冷媒液出口管4が
接続されている。
In this figure, 1 is a refrigerant compressor, 2 is an air-cooled condenser, and the refrigerant compressor 1 and the air-cooled condenser 2 are connected by a refrigerant gas pipe 3. 4 is connected.

この冷媒液出口管4に@縮圧力調整弁5が接続され、こ
の凝縮圧力調整弁5は冷媒ガスバイパス管6を介して、
冷媒ガス管3に接続されているとともに、冷媒配管8を
介して受液器7に接続されている。
A @condensation pressure regulation valve 5 is connected to this refrigerant liquid outlet pipe 4, and this condensation pressure regulation valve 5 is connected via a refrigerant gas bypass pipe 6.
It is connected to the refrigerant gas pipe 3 and also to the liquid receiver 7 via the refrigerant pipe 8 .

なお、13は空冷凝縮器2に複数個配設された送風機で
ある。
Note that 13 is a plurality of blowers arranged in the air-cooled condenser 2.

次に、動作について説明する。冷媒圧縮機1より吐出さ
れた冷媒ガスは冷媒ガス管3を通り、空冷凝縮器2へと
入る。この空冷凝縮器2において、送風機13によって
送風される空気と熱交換することにより、冷媒ガスは凝
縮液化し、冷媒液出口管4、凝縮圧力調整弁5、冷媒配
管8を通り、受液器7へと入る。
Next, the operation will be explained. Refrigerant gas discharged from the refrigerant compressor 1 passes through the refrigerant gas pipe 3 and enters the air-cooled condenser 2. In this air-cooled condenser 2, the refrigerant gas is condensed and liquefied by exchanging heat with the air blown by the blower 13, passes through the refrigerant liquid outlet pipe 4, the condensation pressure regulating valve 5, and the refrigerant pipe 8, and then passes through the liquid receiver 7. Enter.

凝縮圧力が凝縮圧力調整弁5の設定圧力よりも低い場合
は、凝縮圧力調整弁5が内部に有する冷媒液の通路を塞
ぎ、空冷凝縮器2の冷却管内へ冷媒液を滞溜させ、凝縮
表面積を滅じ、凝縮圧力を凝縮圧力調整弁5へ設定圧力
まで上昇させ、そこで再び凝縮圧力調整弁5は冷媒液通
路を開き、冷媒液を受液器7へ送液する。
When the condensing pressure is lower than the set pressure of the condensing pressure regulating valve 5, the condensing pressure regulating valve 5 closes the refrigerant liquid passage inside, causing the refrigerant liquid to accumulate in the cooling pipe of the air-cooled condenser 2, and reducing the condensing surface area. The condensing pressure is increased to the set pressure in the condensing pressure regulating valve 5, and then the condensing pressure regulating valve 5 again opens the refrigerant liquid passage and sends the refrigerant liquid to the liquid receiver 7.

また、凝縮圧力調整弁5は冷媒液通路を閉じる際、同時
に冷媒ガスのバイパス通路6を開く。
Furthermore, when the condensing pressure regulating valve 5 closes the refrigerant liquid passage, it simultaneously opens the refrigerant gas bypass passage 6.

これにより、冷媒圧縮機1より吐出された冷媒ガスの一
部は冷媒ガスバイパス管6、凝縮圧力調整弁5および冷
媒配管8を通り、受液器7へ入り、受液器7内の圧力を
上昇させる。
As a result, a part of the refrigerant gas discharged from the refrigerant compressor 1 passes through the refrigerant gas bypass pipe 6, the condensation pressure regulating valve 5, and the refrigerant pipe 8, enters the liquid receiver 7, and reduces the pressure inside the liquid receiver 7. raise.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

従来の冷凍装置は以上のように構成されているので、凝
縮圧力調整弁5は、冷凍装置が冷凍運転時でも、ホット
ガスバイパスによる図示しない冷却器の除霜運転時でも
、凝縮圧力調整弁5の設定圧力以上になるように、凝縮
圧力を制御する。
Since the conventional refrigeration system is configured as described above, the condensation pressure adjustment valve 5 is operated even when the refrigeration system is in a freezing operation or when a cooler (not shown) is in a defrosting operation using a hot gas bypass. Control the condensing pressure so that it exceeds the set pressure.

ところで、凝縮圧力調整弁5の設定圧力はホットガスバ
イパスによる除霜運転のことを考慮して高めに設定する
ため、冷凍運転時には必要以上に凝縮圧力が高くなるこ
ととなり、冷却能力の低下、所要動力の増大を招くなど
の問題があった。
By the way, since the set pressure of the condensing pressure regulating valve 5 is set high considering the defrosting operation using hot gas bypass, the condensing pressure becomes higher than necessary during the freezing operation, resulting in a decrease in the cooling capacity and the required There were problems such as an increase in power.

この発明は、かかる問題点を解決するためになされたも
ので、冷凍運転と除霜運転のそれぞれの運転状態に応じ
た凝縮圧力の制御を行うことができる冷凍装置を得るこ
とを目的とする。
The present invention was made to solve this problem, and an object of the present invention is to provide a refrigeration system that can control condensation pressure according to the respective operating states of refrigeration operation and defrosting operation.

〔問題点を解決するための手段〕[Means for solving problems]

この発明に係る冷凍装置は、冷媒圧縮機の冷媒吐出ガス
管と凝縮圧力調整弁とを接ぐ冷媒ガスバイパス管の途中
に電磁弁を設けるとともに、凝縮圧力調整弁を電磁弁を
介してバイパスして冷媒配管に連通ずる冷媒液バイパス
管を設けるとともに空気凝縮器が設置しである周囲の空
気温度を検出する温度スイッチを設けたものである。
The refrigeration system according to the present invention provides a solenoid valve in the middle of a refrigerant gas bypass pipe that connects a refrigerant discharge gas pipe of a refrigerant compressor and a condensing pressure regulating valve, and also bypasses the condensing pressure regulating valve via the solenoid valve. A refrigerant liquid bypass pipe communicating with the refrigerant pipe is provided, an air condenser is installed, and a temperature switch is provided to detect the ambient air temperature.

〔作用〕[Effect]

この発明において、冷媒ガスバイパス配管途中に設けた
電磁弁と凝縮圧力調整弁をバイパスする冷媒液バイパス
配管により、必要に応じて凝縮圧力調整弁をバイパスす
る冷媒回路を形成し、凝縮圧力調整弁の設定圧力よりも
低い凝縮圧力で冷凍装置を冷凍運転するとともに、空冷
凝縮器の周囲空気温度を温度スイッチにより検出し、空
気温度が温度スイッチの設定温度より低い場合には空気
凝縮器の送風機の一部を停止して凝縮圧力が低下しすぎ
ないように運転する。
In this invention, a refrigerant circuit that bypasses the condensing pressure regulating valve as necessary is formed by a solenoid valve provided in the middle of the refrigerant gas bypass piping and a refrigerant liquid bypass piping that bypasses the condensing pressure regulating valve. In addition to operating the refrigeration equipment at a condensing pressure lower than the set pressure, the ambient air temperature of the air-cooled condenser is detected by a temperature switch, and if the air temperature is lower than the set temperature of the temperature switch, one of the blowers of the air condenser is Stop the section and operate to prevent the condensing pressure from dropping too much.

〔実施イク1〕 以下、この発明の冷凍装置の実施例について図面に基づ
き説明する。第1図はその一実施例の要部の冷媒系統図
である。この第1図において、重複を避けるために、構
成の説明に際し、第2図と同一部分には同一符号を付す
るのみにとどめ、第2図とは異なる部分を重点的に述べ
る。
[Embodiment 1] Hereinafter, embodiments of the refrigeration apparatus of the present invention will be described based on the drawings. FIG. 1 is a refrigerant system diagram of the main parts of one embodiment. In FIG. 1, in order to avoid duplication, when explaining the configuration, the same parts as those in FIG. 2 are given the same reference numerals, and parts different from those in FIG. 2 are mainly described.

この第2図を第1図と比較しても明らかなように、第1
図では、符号1〜8で示す部分は第2図と同様であり、
符号9以降で示す部分が新たに付加された部分である。
As is clear from comparing this Figure 2 with Figure 1,
In the figure, parts indicated by numerals 1 to 8 are the same as in Fig. 2,
The parts indicated by reference numeral 9 and after are newly added parts.

すなわち、冷媒ガスバイパス管6の途中に第1の電磁弁
9が設けられているとともに、冷媒液出口管4と冷媒配
管8とを冷媒液バイパス管10で接続されており、この
冷媒液バイパス管10の途中に第2の電磁弁11が設け
られている。
That is, a first electromagnetic valve 9 is provided in the middle of the refrigerant gas bypass pipe 6, and the refrigerant liquid outlet pipe 4 and the refrigerant pipe 8 are connected by a refrigerant liquid bypass pipe 10. A second solenoid valve 11 is provided in the middle of the valve 10.

また、空冷凝縮器2の近くに、温度スイッチ12が配設
されている。
Further, a temperature switch 12 is disposed near the air-cooled condenser 2.

次に、動作について説明する。冷凍装置が除霜運転を行
うときには、第2の電磁弁11を閉し、第1の電磁弁9
を開くことにより、冷媒圧縮機1より吐出された冷媒ガ
スは冷媒吐出ガス管3を通り、空冷凝縮器2へと入る。
Next, the operation will be explained. When the refrigeration system performs defrosting operation, the second solenoid valve 11 is closed and the first solenoid valve 9 is closed.
By opening the refrigerant compressor 1, the refrigerant gas discharged from the refrigerant compressor 1 passes through the refrigerant discharge gas pipe 3 and enters the air-cooled condenser 2.

この空冷凝縮器2において、冷媒ガスは凝縮液化し、冷
媒液出口管4、凝縮圧力調整弁5、冷媒配管8を通り受
液器7へと入る。
In the air-cooled condenser 2, the refrigerant gas is condensed and liquefied, and enters the liquid receiver 7 through the refrigerant liquid outlet pipe 4, the condensation pressure regulating valve 5, and the refrigerant pipe 8.

このとき、凝縮圧力が凝縮圧力調整弁5の設定圧力より
も低い場合は凝縮圧力調整弁5が内部の冷媒液の通路を
塞ぎ、空冷凝縮器2の冷却管内へ冷媒液を滞溜させ、凝
縮表面積を減じ、凝縮圧力を凝縮圧力調整弁5の設定圧
力まで上昇させ、そこで凝縮圧力調整弁5は冷媒液通路
を開き、冷媒液を受液器7へ送液する。
At this time, if the condensing pressure is lower than the set pressure of the condensing pressure regulating valve 5, the condensing pressure regulating valve 5 closes the internal refrigerant liquid passage, causes the refrigerant to accumulate in the cooling pipe of the air-cooled condenser 2, and is condensed. The surface area is reduced and the condensing pressure is increased to the set pressure of the condensing pressure regulating valve 5, whereupon the condensing pressure regulating valve 5 opens the refrigerant liquid passage and sends the refrigerant liquid to the liquid receiver 7.

凝縮圧力調整弁5は冷媒液通路を閉じる際、同時に冷媒
ガスのバイパス通路を開く。これにより、冷媒圧縮機1
より吐出された冷媒ガスの一部は冷媒ガスバイパス管6
、凝縮圧力調整弁5、冷媒配管8を通り、受液器7へと
入り、受液器7内の圧力を上昇させる。
When the condensing pressure regulating valve 5 closes the refrigerant liquid passage, it simultaneously opens the refrigerant gas bypass passage. As a result, the refrigerant compressor 1
A part of the refrigerant gas discharged from the refrigerant gas bypass pipe 6
, the condensation pressure regulating valve 5, and the refrigerant pipe 8, and enters the liquid receiver 7, increasing the pressure inside the liquid receiver 7.

冷凍装置が冷凍運転を行うときには、第1の電磁弁9を
閉じ、第2の電磁弁11を開くことにより、冷媒圧縮機
1より吐出された冷媒ガスは冷媒吐出ガス管3を通り、
空冷凝縮器2へと入る。
When the refrigeration system performs refrigeration operation, the first solenoid valve 9 is closed and the second solenoid valve 11 is opened, so that the refrigerant gas discharged from the refrigerant compressor 1 passes through the refrigerant discharge gas pipe 3.
It enters the air-cooled condenser 2.

この空冷凝縮器2により、冷媒ガスは空冷凝縮器2に装
着された送風機13より送風される空気と熱交換し、凝
縮液化し、冷媒液出口管4、冷媒液バイパス管10、冷
媒配管8を通り、受液器7へと入る。
In this air-cooled condenser 2, the refrigerant gas exchanges heat with the air blown by the blower 13 attached to the air-cooled condenser 2, is condensed and liquefied, and is connected to the refrigerant liquid outlet pipe 4, the refrigerant liquid bypass pipe 10, and the refrigerant pipe 8. and enters the liquid receiver 7.

このとき、空冷凝縮器2の周囲空気温度を温度スイッチ
12により検出し、空気温度が温度スイッチの設定温度
よりも低い場合は、送風機13の一部を停止させ、空冷
凝縮器2への送風量を減じる。
At this time, the ambient air temperature of the air-cooled condenser 2 is detected by the temperature switch 12, and if the air temperature is lower than the set temperature of the temperature switch, a part of the blower 13 is stopped, and the amount of air blown to the air-cooled condenser 2 is reduced. decrease.

〔発明の効果〕〔Effect of the invention〕

この発明は以上説明したとおり、除霜運転を行っている
ときには、凝縮圧力調整弁により凝縮圧力を凝縮圧力調
整弁の設定圧力以上に保ち、冷凍運転時には凝縮圧力調
整弁を作動させずに空冷凝縮器に装着された送風機の発
停による風量制御による凝縮圧力の制御を行うように構
成したので、冷凍運転を行うときは除霜運転を行うとき
よりも凝縮圧力を低くすることができる。これにともな
い、冷却能力の向上、所要電力の低減ができる効果が得
られる。
As explained above, this invention maintains the condensing pressure above the set pressure of the condensing pressure regulating valve using the condensing pressure regulating valve during defrosting operation, and air-cooling condensation without operating the condensing pressure regulating valve during freezing operation. Since the condensing pressure is controlled by controlling the air volume by turning on and off the blower attached to the container, the condensing pressure can be made lower when performing freezing operation than when performing defrosting operation. Along with this, the effect of improving the cooling capacity and reducing the required power can be obtained.

【図面の簡単な説明】[Brief explanation of drawings]

第1図はこの発明の冷凍装置の一実施例の要部冷媒系統
図、第2図は従来の冷凍装置の要部冷媒系統図である。 1・・・冷媒圧縮機、2・・・空冷凝縮器、5・・・凝
縮圧力調整弁、7・・・受液器、9・・・第1の電磁弁
、11・・・第2の電磁弁。 なお、図中同一符号は同一または相当部分を示す。
FIG. 1 is a refrigerant system diagram of the main parts of an embodiment of the refrigeration system of the present invention, and FIG. 2 is a refrigerant system diagram of the main parts of a conventional refrigeration system. DESCRIPTION OF SYMBOLS 1... Refrigerant compressor, 2... Air-cooled condenser, 5... Condensing pressure adjustment valve, 7... Liquid receiver, 9... First electromagnetic valve, 11... Second solenoid valve. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

【特許請求の範囲】[Claims] 冷媒圧縮機から吐出された冷媒ガスを凝縮液化しかつ複
数の送風機を有する空冷凝縮器と、この空冷凝縮器の凝
縮圧力を調整する凝縮圧力調整弁と、この凝縮圧力調整
弁に冷媒配管を介して接続された受液器と、上記冷媒圧
縮機と空冷凝縮器との間と上記凝縮圧力調整弁との間に
設けられ冷凍運転時には閉じかつ除霜運転時に開いて上
記空冷凝縮器の冷媒の凝縮圧力が上記凝縮圧力調整弁の
設定圧力より低いとき冷媒圧縮機から吐出される冷媒ガ
スを凝縮圧力調整弁側にバイパスさせる第1の電磁弁と
、上記空冷凝縮器と凝縮圧力調整弁との間およびこの凝
縮圧力調整弁と受液器との間に設けられ除霜運転時には
閉じかつ冷凍運転時に開いて空冷凝縮器から吐出される
冷媒液を受液器にバイパスさせる第2の電磁弁と、上記
空冷凝縮器の設置個所の温度を検出し設定温度以下のと
き上記送風機の温度の一部を停止する温度スイッチとを
備えてなる冷凍装置。
An air-cooled condenser that condenses and liquefies refrigerant gas discharged from a refrigerant compressor and has a plurality of blowers, a condensing pressure regulating valve that adjusts the condensing pressure of this air-cooling condenser, and a refrigerant pipe connected to the condensing pressure regulating valve. A liquid receiver connected to the refrigerant compressor, the air-cooled condenser, and the condensing pressure regulating valve are provided between the refrigerant compressor and the air-cooled condenser and the condensing pressure regulating valve. a first electromagnetic valve that bypasses refrigerant gas discharged from the refrigerant compressor to the condensing pressure regulating valve side when the condensing pressure is lower than the set pressure of the condensing pressure regulating valve; and the air-cooled condenser and the condensing pressure regulating valve. and a second electromagnetic valve provided between the condensing pressure regulating valve and the liquid receiver, which closes during defrosting operation and opens during freezing operation to bypass the refrigerant liquid discharged from the air-cooled condenser to the liquid receiver. and a temperature switch that detects the temperature at the location where the air-cooled condenser is installed and stops part of the temperature of the blower when the temperature is below a set temperature.
JP2062286A 1986-01-30 1986-01-30 Refrigerator Pending JPS62178854A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2062286A JPS62178854A (en) 1986-01-30 1986-01-30 Refrigerator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2062286A JPS62178854A (en) 1986-01-30 1986-01-30 Refrigerator

Publications (1)

Publication Number Publication Date
JPS62178854A true JPS62178854A (en) 1987-08-05

Family

ID=12032338

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2062286A Pending JPS62178854A (en) 1986-01-30 1986-01-30 Refrigerator

Country Status (1)

Country Link
JP (1) JPS62178854A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6343139A (en) * 1986-08-08 1988-02-24 Fuji Photo Film Co Ltd Processing method for silver halide color photographic sensitive material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6343139A (en) * 1986-08-08 1988-02-24 Fuji Photo Film Co Ltd Processing method for silver halide color photographic sensitive material

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