JPS6030964A - Refrigerator - Google Patents

Refrigerator

Info

Publication number
JPS6030964A
JPS6030964A JP14030083A JP14030083A JPS6030964A JP S6030964 A JPS6030964 A JP S6030964A JP 14030083 A JP14030083 A JP 14030083A JP 14030083 A JP14030083 A JP 14030083A JP S6030964 A JPS6030964 A JP S6030964A
Authority
JP
Japan
Prior art keywords
refrigerant
evaporator
condenser
refrigerant compressor
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.)
Pending
Application number
JP14030083A
Other languages
Japanese (ja)
Inventor
孝 梅木
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 JP14030083A priority Critical patent/JPS6030964A/en
Publication of JPS6030964A publication Critical patent/JPS6030964A/en
Pending legal-status Critical Current

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  • 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】 この発明は、冷媒回路が2系統ある冷凍装置において、
冷媒圧縮機の液冷媒が起動時にこの冷媒圧縮機へ吸い込
まれることを防止できるようにした冷凍装置に関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention provides a refrigeration system having two refrigerant circuits.
The present invention relates to a refrigeration system that can prevent liquid refrigerant in a refrigerant compressor from being sucked into the refrigerant compressor during startup.

従来、この種の装置として、第1図番;示すものが知ら
れている。この第1図し;おいて、11,21はそれぞ
れ冷媒圧縮機である。この冷媒圧縮機11.21はそれ
ぞれ蒸発器01の左側と右側の2系統の冷媒回路の主体
をなすものである。
Conventionally, as this type of device, the one shown in Figure 1 is known. In FIG. 1, 11 and 21 are refrigerant compressors, respectively. The refrigerant compressors 11 and 21 constitute the main bodies of two refrigerant circuits, one on the left side and one on the right side of the evaporator 01, respectively.

冷媒圧縮機11.21から吐出された冷媒ガスはそれぞ
れ凝縮器13.23、自動開閉弁14.24、減圧弁1
5.25、蒸発器01、アキュームレータ17.27を
通して冷媒圧縮機11,21に戻るようになっている。
The refrigerant gas discharged from the refrigerant compressor 11.21 is transferred to a condenser 13.23, an automatic on-off valve 14.24, and a pressure reducing valve 1, respectively.
5.25, evaporator 01, and accumulator 17.27 to return to the refrigerant compressors 11 and 21.

凝縮器13.23にはそれぞれ冷却水04が流通するよ
うになっており、蒸発器01には、温調・発停サーモ0
2が設けられているとともに、ブライン回路03が設け
られている。これらのブライン回路03、温調・発停サ
ーモ01は2系統の冷媒回路に共通になっている。
Cooling water 04 flows through each of the condensers 13 and 23, and a temperature control/start/stop thermometer 0 flows through the evaporator 01.
2 is provided, and a brine circuit 03 is also provided. These brine circuit 03 and temperature control/start/stop thermostat 01 are common to the two refrigerant circuits.

次に動作について説明する。冷媒圧縮機11.21にて
圧縮された冷媒ガスは凝縮器13.23で冷却水04と
熱交換して凝縮され、凝縮器13.23内で液溜り状態
となる。
Next, the operation will be explained. The refrigerant gas compressed by the refrigerant compressor 11.21 is condensed by exchanging heat with the cooling water 04 in the condenser 13.23, and becomes a liquid pool in the condenser 13.23.

さらに、液冷媒は自動開閉弁14.24を通り、減圧弁
15.25で減圧され、蒸発器01でブライン(負荷)
03と熱交換を行う。
Furthermore, the liquid refrigerant passes through an automatic on-off valve 14.24, is depressurized by a pressure reducing valve 15.25, and is brine (loaded) in an evaporator 01.
Heat exchange with 03.

この蒸発器01で熱交換された冷媒は導管を通してアキ
ュームレータ17.27に入り、ここで、気液分離され
、冷媒ガスは吸入を通り、冷媒圧縮機11.21へ吸い
込まれる。
The refrigerant heat-exchanged in this evaporator 01 enters the accumulator 17.27 through a conduit, where it is separated into gas and liquid, and the refrigerant gas passes through the suction and is sucked into the refrigerant compressor 11.21.

ここで、自動開閉弁、14.24の動作は冷媒圧縮機1
1.21の停止中は閉の状態を保ち、冷媒圧縮機11.
21の運転中は開の状態となるようにしている。
Here, the automatic opening/closing valve, 14.24, operates on the refrigerant compressor 1.
During the stoppage of 1.21, the refrigerant compressor 11. remains closed.
21 is in an open state while it is in operation.

なお、温調・発停サーモ02はブライン回路03の温度
を感知して冷媒圧縮機11.21に発停信号を送る。
In addition, the temperature control/start/stop thermometer 02 senses the temperature of the brine circuit 03 and sends a start/stop signal to the refrigerant compressor 11.21.

従来の冷凍装置は以上のように構成されているので、片
側運転(系統は停止状態)時、停止側の冷媒ガスがブラ
イン回路03と熱交換し、蒸発器内で凝縮液となり、寝
込むので、再起動時、その液冷媒を冷媒圧縮機11.2
1が吸い込むなどの欠点があった。
Since the conventional refrigeration system is configured as described above, when one side is operated (the system is stopped), the refrigerant gas on the stopped side exchanges heat with the brine circuit 03, becomes a condensed liquid in the evaporator, and stagnates. When restarting, the liquid refrigerant is transferred to the refrigerant compressor 11.2.
There were drawbacks such as 1 being inhaled.

この発明1.f、上記従来の欠点を除去するためになさ
れたもので、冷媒圧縮機の後に逆止弁を組み込み、凝縮
器から冷媒圧縮機を経て、蒸発器への冷媒ガスの流れを
防止するとともに、冷媒圧縮機への停止信号により、冷
媒圧縮機より先に自動開閉弁を閉じることによって、蒸
発器からアキュームレータの冷媒を凝縮器へ戻すことに
より、蒸発器内に冷媒の寝込みを防止でき、冷媒圧縮機
の起動時の液冷媒吸込みを防止できる冷凍装置を提供す
ることを目的とする。
This invention 1. f. This was done in order to eliminate the above-mentioned drawbacks of the conventional method, and a check valve is installed after the refrigerant compressor to prevent the flow of refrigerant gas from the condenser to the evaporator through the refrigerant compressor, and to prevent refrigerant gas from flowing from the condenser to the evaporator. When a stop signal is sent to the compressor, the automatic on-off valve is closed before the refrigerant compressor, and the refrigerant in the accumulator is returned from the evaporator to the condenser, preventing refrigerant from staying in the evaporator. An object of the present invention is to provide a refrigeration system that can prevent liquid refrigerant from being sucked in during startup.

以下、この発明の冷凍装置の実施例について図に基づき
説明する。第2図はその一実施例の構成を示す冷媒回路
図である。この第2図において、重複を避けるために、
第1図と同一部分の構成は同一符号を付してその説明を
省略し、第1図とは異なる部分を重点的に述ることにす
る。
Hereinafter, embodiments of the refrigeration system of the present invention will be described based on the drawings. FIG. 2 is a refrigerant circuit diagram showing the configuration of one embodiment. In this Figure 2, to avoid duplication,
Components that are the same as those in FIG. 1 are designated by the same reference numerals, and their explanations will be omitted, and the portions that are different from those in FIG. 1 will be mainly described.

この第2図を第1図と比較しても明らがなように、冷媒
圧縮機11.21の出口側にそれぞれ逆止弁12.22
が設けられている。この逆止弁王2.22は冷媒圧縮機
11.21のガス吐出方向に冷媒を流すことができるが
、凝縮器13.23から冷媒圧縮機11.21側へは流
れないようになっている。
As is not clear even when comparing FIG. 2 with FIG.
is provided. This check valve king 2.22 allows refrigerant to flow in the gas discharge direction of the refrigerant compressor 11.21, but prevents it from flowing from the condenser 13.23 to the refrigerant compressor 11.21 side. .

1゜ また、蒸発器01とアキュームレータ17,217との
間において、圧力スイッチ16.26が設けられている
。これらの圧力スイッチ16.26は蒸発器01から冷
媒圧縮機11.21までの冷媒の圧力を感知して作動す
るものである。その他の部分は第1図と同様に構成され
ている。
1. Additionally, a pressure switch 16.26 is provided between the evaporator 01 and the accumulators 17, 217. These pressure switches 16.26 operate by sensing the pressure of the refrigerant from the evaporator 01 to the refrigerant compressor 11.21. The other parts are constructed in the same manner as in FIG.

次に、以上のように構成されたこの発明の冷凍装置の動
作について説明する。冷媒圧縮機11.21で圧縮され
た冷媒ガスは、逆止弁12.22を通り、凝縮器13.
23にて凝縮され、液になり、自動開閉弁14.24を
通り、減圧装置15.25で減圧され、蒸発器01内で
負荷と熱交換する。
Next, the operation of the refrigeration system of the present invention configured as described above will be explained. The refrigerant gas compressed by the refrigerant compressor 11.21 passes through the check valve 12.22 and enters the condenser 13.21.
It is condensed and becomes a liquid at 23, passes through an automatic on-off valve 14.24, is depressurized by a pressure reducing device 15.25, and exchanges heat with the load in the evaporator 01.

冷凍装置の負荷が減り、低負荷になった場合、ブライン
温度を感知して作動する温調・発停サーモ02により、
容量制御の指令が出て1系統はポンプダウン運転2.こ
なる。
When the load on the refrigeration equipment decreases and becomes low, the temperature control/start/stop thermometer 02, which operates by sensing the brine temperature, will
A command for capacity control is issued, and one system is in pump-down operation.2. This will happen.

すなわち、低圧側に設けた圧力スイッチ16は蒸発器0
1からアキュームレータ17までの冷媒を凝縮器13へ
液として溜め、圧力スイッチ16の設定値まで運転し、
停止する。
That is, the pressure switch 16 provided on the low pressure side
The refrigerant from 1 to the accumulator 17 is stored as a liquid in the condenser 13, and the operation is performed until the set value of the pressure switch 16 is reached.
Stop.

片側系統のみ停止しても他系統は運転中なので、ブライ
ン温度は低い状態であるが、停止側はポンプダウンされ
て、冷媒ガスは少ないので、冷媒が蒸発器内で寝込むこ
とはなくなる。
Even if only one system is stopped, the other system is still operating, so the brine temperature is low, but the stopped side is pumped down and there is less refrigerant gas, so the refrigerant will not stay in the evaporator.

さらに、低負荷となり、ブライン温度が低下すると、他
系統も温調・発停サーモ02により、自動開閉弁24を
閉じ、圧力スイッチ26の設定値までポンプダウンして
停止する。
Further, when the load becomes low and the brine temperature decreases, the temperature control/start/stop thermostat 02 closes the automatic on-off valve 24 of other systems as well, pumps down to the set value of the pressure switch 26, and stops.

なお、ポンプダウンして凝縮器13.23に溜めた冷媒
は自動開閉弁14.24、逆止弁12.22によって仕
切っているため、冷媒の移動は全くない。
In addition, since the refrigerant pumped down and stored in the condenser 13.23 is separated by the automatic opening/closing valve 14.24 and the check valve 12.22, there is no movement of the refrigerant at all.

さらに、蒸発器01内での冷媒の寝込みと起動時の液冷
媒吸込みを防止する。
Furthermore, stagnation of refrigerant within the evaporator 01 and suction of liquid refrigerant at startup are prevented.

なお、上記実施例では、2系統をもち、ブライン回路が
共通の冷凍装置に逆止弁12.22を設けた場合につい
て説明したが、ブライン回路がわかれた冷凍装置に設け
ることができる。
In the above embodiment, a case has been described in which the check valves 12 and 22 are provided in a refrigeration system having two systems and a common brine circuit, but the check valves 12 and 22 can be provided in a refrigeration system with separate brine circuits.

以上のように、この発明の冷凍装置によれば。As described above, according to the refrigeration apparatus of the present invention.

冷媒圧縮機と凝縮器の間に逆止弁を設けるようにしたの
で、停止中に凝縮器から冷媒圧縮機への冷媒ガスの流れ
を防止できる。
Since the check valve is provided between the refrigerant compressor and the condenser, it is possible to prevent refrigerant gas from flowing from the condenser to the refrigerant compressor during stoppage.

また、冷媒回路の低圧側に圧力スイッチを設け、2系統
ある冷凍装置で温調・発停サーモによって自動停止する
場合、必ず低圧スイッチの設定値までポンプダウンして
冷媒圧縮機を停止するようにしたので、起動時の液冷媒
吸込防止ができるものである。
Additionally, a pressure switch is installed on the low-pressure side of the refrigerant circuit, and when a two-system refrigeration system is automatically stopped by temperature control or a start/stop thermostat, the refrigerant compressor must be pumped down to the set value of the low pressure switch to stop the refrigerant compressor. Therefore, it is possible to prevent liquid refrigerant from being sucked in during startup.

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

第1図は従来の冷凍装置の系統図、第2図はこの発明の
冷凍装置の一実施例の系統図である。 11.21・・・冷媒圧縮機、12.22・・・逆止弁
、13.23・・・凝縮器、14.24・・・自動開閉
弁、15.25・・・減圧弁、16.26・・・圧力ス
イッチ、17.27・・・アキュームレータ、01・・
・蒸発器、02・・・温調・発停サーモ、03・・・ブ
ライン回路、04・・・冷却水、 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 system diagram of a conventional refrigeration system, and FIG. 2 is a system diagram of an embodiment of the refrigeration system of the present invention. 11.21... Refrigerant compressor, 12.22... Check valve, 13.23... Condenser, 14.24... Automatic opening/closing valve, 15.25... Pressure reducing valve, 16. 26...Pressure switch, 17.27...Accumulator, 01...
・Evaporator, 02...Temperature control/start/stop thermostat, 03...Brine circuit, 04...Cooling water In addition, the same reference numerals in the drawings indicate the same or equivalent parts.

Claims (1)

【特許請求の範囲】[Claims] 冷媒圧縮機、凝縮器、蒸発器、アキュームレータなどで
2系統の冷媒サイクルを構成した冷凍装置において、上
記冷媒圧縮機との間に逆止弁を設けかつ冷媒の低圧側の
圧力を感知して所定の設定圧力になるまで運転を停止さ
せる圧力スイッチを設けたことを特徴とする冷凍装置。
In a refrigeration system in which a two-system refrigerant cycle is configured with a refrigerant compressor, a condenser, an evaporator, an accumulator, etc., a check valve is provided between the refrigerant compressor and the pressure on the low pressure side of the refrigerant is sensed. A refrigeration system characterized by being equipped with a pressure switch that stops operation until a set pressure is reached.
JP14030083A 1983-07-29 1983-07-29 Refrigerator Pending JPS6030964A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14030083A JPS6030964A (en) 1983-07-29 1983-07-29 Refrigerator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14030083A JPS6030964A (en) 1983-07-29 1983-07-29 Refrigerator

Publications (1)

Publication Number Publication Date
JPS6030964A true JPS6030964A (en) 1985-02-16

Family

ID=15265575

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14030083A Pending JPS6030964A (en) 1983-07-29 1983-07-29 Refrigerator

Country Status (1)

Country Link
JP (1) JPS6030964A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6202463B1 (en) 1996-12-27 2001-03-20 Kawasaki Steel Corporation Plug and mandrel bar for seamless steel pipe rolling operation for manufacturing seamless steel pipe
JP2009174785A (en) * 2008-01-25 2009-08-06 Topre Corp Independent two system refrigerator and its operation control method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6202463B1 (en) 1996-12-27 2001-03-20 Kawasaki Steel Corporation Plug and mandrel bar for seamless steel pipe rolling operation for manufacturing seamless steel pipe
JP2009174785A (en) * 2008-01-25 2009-08-06 Topre Corp Independent two system refrigerator and its operation control method

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