JPS6310351B2 - - Google Patents
Info
- Publication number
- JPS6310351B2 JPS6310351B2 JP4123680A JP4123680A JPS6310351B2 JP S6310351 B2 JPS6310351 B2 JP S6310351B2 JP 4123680 A JP4123680 A JP 4123680A JP 4123680 A JP4123680 A JP 4123680A JP S6310351 B2 JPS6310351 B2 JP S6310351B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- electromagnetic
- refrigerant
- oil
- cooler
- 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
Links
- 239000003507 refrigerant Substances 0.000 claims description 36
- 238000002347 injection Methods 0.000 claims description 16
- 239000007924 injection Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 15
- 238000012360 testing method Methods 0.000 description 10
- 238000005429 filling process Methods 0.000 description 7
- 230000007423 decrease Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000010926 purge Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000011079 streamline operation Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Landscapes
- Control Of Positive-Displacement Pumps (AREA)
Description
【発明の詳細な説明】
本発明はクーラの冷媒ガス充填時にオイルを冷
媒ガスと共に加給する装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for adding oil together with refrigerant gas when filling a cooler with refrigerant gas.
従来、クーラへの冷媒ガス注入とオイル加給は
相互に独立して行われていたが、同時に行うこと
ができれば作業の合理化になることはいうまでも
ない。 Conventionally, refrigerant gas injection and oil replenishment into the cooler have been performed independently of each other, but it goes without saying that if they can be performed at the same time, the work will be streamlined.
本発明の目的は冷媒ガス充填装置に簡単に付設
し得るオイル加給装置を提供し、クーラにオイル
を冷媒ガスと共に注入して作業の合理化を図るこ
とにある。 An object of the present invention is to provide an oil supply device that can be easily attached to a refrigerant gas filling device, and to streamline operations by injecting oil into a cooler together with refrigerant gas.
前記目的を達成するため本発明の装置の要旨と
するところは、冷媒ガス注入装置の冷媒注入側管
路に電磁開閉弁を介してオイルポンプの吐出口を
接続し、そのオイルポンプと電磁開閉弁の作動を
冷媒ガス注入時のクーラのコンプレツサの作動に
同期させたことにある。 In order to achieve the above object, the gist of the device of the present invention is to connect the discharge port of an oil pump to the refrigerant injection side conduit of a refrigerant gas injection device via an electromagnetic on-off valve, and to connect the oil pump and the electromagnetic on-off valve. The reason is that the operation of the compressor is synchronized with the operation of the cooler compressor when refrigerant gas is injected.
本発明の装置を図面に示す実施例に基づいて説
明する。第１図に示すように、冷媒ガス注入装置
はクーラサイクルに接続する高圧側接続口１と低
圧側接続口２を備える。高圧側接続口１から第二
電磁開閉弁８に至る管路に高圧側圧力計３、圧力
スイツチ５を接続し、さらに第三電磁弁９を介し
て真空ポンプ１０の吸入口を連結する。低圧側接
続口２から電磁開閉弁８に至る管路に低圧側圧力
計４、真空スイツチ６、第一電磁開閉弁７を接続
する。三個の冷媒槽１３，１４，１５の各出口１
２をまとめて比較的容積の小さいハニカムヒータ
型蒸発器１７の入口に至る管路を設けるが、途中
に第五電磁開閉弁１６を挿入して槽１３だけから
の冷媒ガス供給を可能にしておく。第四電磁開閉
弁１１を介して蒸発器１７の出口を低圧側接続口
２から電磁開閉弁８に至る管路に接続する。蒸発
器１７の出口から電磁開閉弁１１に至る管路にオ
イルタンク２０とオイルポンプ１９と第六電磁開
閉弁１８と逆止弁２５を直列したオイル加給回路
を接続する。各電磁開閉弁は、第２図に示すよう
に、三個のタイマ２１，２２，２３と手動スイツ
チ２４を含む電気回路により制御される。 The apparatus of the present invention will be explained based on embodiments shown in the drawings. As shown in FIG. 1, the refrigerant gas injection device includes a high-pressure side connection port 1 and a low-pressure side connection port 2 that connect to a cooler cycle. A high pressure side pressure gauge 3 and a pressure switch 5 are connected to a conduit from the high pressure side connection port 1 to the second electromagnetic on-off valve 8, and further connected to the suction port of a vacuum pump 10 via a third electromagnetic valve 9. A low-pressure side pressure gauge 4, a vacuum switch 6, and a first electromagnetic on-off valve 7 are connected to a conduit from the low-pressure side connection port 2 to the electromagnetic on-off valve 8. Each outlet 1 of the three refrigerant tanks 13, 14, 15
2 together to the inlet of the honeycomb heater type evaporator 17, which has a relatively small volume, and a fifth electromagnetic on-off valve 16 is inserted in the middle to make it possible to supply refrigerant gas only from the tank 13. . The outlet of the evaporator 17 is connected to a conduit from the low-pressure side connection port 2 to the electromagnetic on-off valve 8 via the fourth electromagnetic on-off valve 11 . An oil supply circuit in which an oil tank 20, an oil pump 19, a sixth electromagnetic on-off valve 18, and a check valve 25 are connected in series is connected to a conduit from the outlet of the evaporator 17 to the electromagnetic on-off valve 11. Each electromagnetic on-off valve is controlled by an electric circuit including three timers 21, 22, 23 and a manual switch 24, as shown in FIG.
冷媒ガスをクーラに注入するには、先ず、高圧
側、低圧側接続口１，２をクーラサイクルのコン
プレツサに接続する。この時、クーラサイクル内
に冷媒ガスが存在すると、圧力スイツチ５が入
り、同時に真空スイツチ６も入る。そこで、電磁
開閉弁７，８が開き、クーラサイクル内のガスが
排出される。サイクル内の圧力が低下して２Kg／
cm2程度になると、圧力スイツチ５が切れ、電磁開
閉弁７は閉じる。始めにクーラサイクル内の圧力
が２Kg／cm2以下であれば、このページ工程は省略
される。 To inject refrigerant gas into the cooler, first, the high pressure side and low pressure side connection ports 1 and 2 are connected to the compressor of the cooler cycle. At this time, if refrigerant gas is present in the cooler cycle, the pressure switch 5 is turned on and the vacuum switch 6 is also turned on at the same time. Then, the electromagnetic on-off valves 7 and 8 are opened, and the gas in the cooler cycle is discharged. Pressure inside the cycle decreases to 2Kg/
When the pressure reaches about cm 2 , the pressure switch 5 is turned off and the electromagnetic on-off valve 7 is closed. Initially, if the pressure in the cooler cycle is 2 kg/cm 2 or less, this page step is omitted.
圧力スイツチ５が切れた時、真空スイツチ６は
入りであり、電磁開閉弁９は開き、真空ポンプ１
０が作動してクーラサイクル内の真空引きを行
う。サイクル内の真空度が700mmHg程度になる
と、真空スイツチ６が切れ、真空引きタイマ２１
が始動する。この圧力スイツチ５が切れてから真
空スイツチ６も切れるまでの工程を第一真空引き
工程と呼ぶ。 When the pressure switch 5 is turned off, the vacuum switch 6 is turned on, the electromagnetic on-off valve 9 is opened, and the vacuum pump 1 is turned on.
0 operates to evacuate the inside of the cooler cycle. When the degree of vacuum in the cycle reaches approximately 700mmHg, the vacuum switch 6 is turned off and the vacuum timer 21 is activated.
starts. The process from when the pressure switch 5 is turned off until the vacuum switch 6 is also turned off is called a first evacuation process.
真空引きタイマ２１はあらかじめ設定した時間
作動し続けるが、その間、真空ポンプ１０がサイ
クル内の真空度を上げる。この工程を第二真空引
き工程と呼ぶ。タイマ２１が切れると、電磁開閉
弁９が閉じ、第二真空引き工程は終了する。 The evacuation timer 21 continues to operate for a preset period of time, during which time the vacuum pump 10 increases the degree of vacuum within the cycle. This step is called the second evacuation step. When the timer 21 expires, the electromagnetic on-off valve 9 closes, and the second evacuation process ends.
真空引きタイマ２１が切れると、リークテスト
用タイマ２２が入り、一定の時間その作動を継続
する。その間にサイクル内の真空度低下の状態を
真空スイツチ６で調べる。この工程をリークテス
ト工程と呼ぶ。ガスもれがあると真空度が低下し
て真空スイツチ６が入る。 When the evacuation timer 21 expires, the leak test timer 22 starts and continues its operation for a certain period of time. During this time, the vacuum switch 6 is used to check whether the degree of vacuum in the cycle has decreased. This process is called a leak test process. If there is a gas leak, the degree of vacuum decreases and the vacuum switch 6 is turned on.
リークテスト用タイマ２２が切れると、電磁開
閉弁８，１１が開き、冷媒槽１３の冷媒が蒸発器
１７で加熱されて気化しサイクル内に流入する。
冷媒ガスの流入によりサイクル内の圧力が２Kg／
cm2程度以上になると、圧力スイツチ５が入る。こ
の工程を第一充填工程と呼ぶ。 When the leak test timer 22 expires, the electromagnetic on-off valves 8 and 11 open, and the refrigerant in the refrigerant tank 13 is heated and vaporized in the evaporator 17, and flows into the cycle.
Due to the inflow of refrigerant gas, the pressure inside the cycle increases to 2Kg/
When the pressure exceeds about cm2 , pressure switch 5 is turned on. This process is called the first filling process.
圧力スイツチ５が入ると、電磁開閉弁１６が開
き、電磁開閉弁８は閉じ、エンジンスタートラン
プ２６が点灯する。作業者は直ちにクーラのコン
プレツサを始動し、全冷媒槽１３，１４，１５か
ら冷媒ガスをサイクル内に流入させる第二充填工
程を開始する。スイツチ２４を切ると冷媒ガスの
サイクル内への流入は停止するが、再度スイツチ
２４を入れると冷媒ガスのサイクル内への流入は
再開するので、適当な量の冷媒ガスをサイクル内
に注入することができる。第二充填工程と共に冷
媒ガスの注入作業は完了するが、始めのパージ工
程から終りの第二充填工程に至る間のサイクル内
の圧力の変化を第３図に示す。図において、Ｄは
パージ工程、Ｖ−は第一真空引き工程、Ｖ−
か第二真空引き工程、Ｔはリークテスト工程、Ｃ
−は第一充填工程、Ｃ−は第二充填工程をそ
れぞれ示す。 When the pressure switch 5 is turned on, the electromagnetic on-off valve 16 opens, the electromagnetic on-off valve 8 closes, and the engine start lamp 26 lights up. The operator immediately starts the compressor of the cooler and begins a second filling process in which refrigerant gas from all refrigerant tanks 13, 14, and 15 flows into the cycle. When the switch 24 is turned off, the flow of refrigerant gas into the cycle is stopped, but when the switch 24 is turned on again, the flow of refrigerant gas into the cycle is resumed, so an appropriate amount of refrigerant gas can be injected into the cycle. Can be done. The refrigerant gas injection operation is completed with the second filling step, and FIG. 3 shows the change in pressure within the cycle from the initial purge step to the final second filling step. In the figure, D is the purge process, V- is the first vacuuming process, and V-
, second vacuum drawing process, T is leak test process, C
- indicates the first filling process, and C- indicates the second filling process.
サイクル内にガスもれがあると、リークテスト
用タイマ２２が作動中のリークテスト工程におい
て、第３図に破線で示すように、真空度が低下
し、真空スイツチ６が入る。同時にガスもれ表示
ランプ２７と警報ブザー２８が作動し、第二充填
工程の回路は切られる。リークテスト用タイマ２
２が停止すると、電磁開閉弁１１が開き、冷媒ガ
スをサイクル内にその圧力が２Kg／cm2程度になる
まで注入する第一充填工程が行われた後に注入作
業は停止する。そこで、作業者はリークテスタ等
を使用してガスもれ個所の発見を行うことができ
る。 If there is a gas leak in the cycle, the degree of vacuum decreases and the vacuum switch 6 is turned on during the leak test process while the leak test timer 22 is operating, as shown by the broken line in FIG. At the same time, the gas leak indicator lamp 27 and alarm buzzer 28 are activated, and the circuit for the second filling process is cut off. Leak test timer 2
2, the electromagnetic on-off valve 11 opens and a first filling process is performed in which refrigerant gas is injected into the cycle until its pressure reaches about 2 kg/cm 2 , and then the injection operation is stopped. Therefore, the operator can use a leak tester or the like to find the gas leak location.
本発明の装置においては、オイル加給を冷媒ガ
ス注入と同時に行うことが可能である。エンジン
スタートランプ２６が点灯すると同時に電磁開閉
弁１８が開き、オイル加給用タイマ２３が作動
し、オイルポンプ１９が始動する。オイルポンプ
１９はオイルタンク２０のオイルを吸入してそれ
を５Kg／cm2程度に加圧し、電磁開閉弁１８と逆止
弁２５を介してサイクル内に流入する。オイル加
給用タイマ２３の作動時間を調整することにより
適量のオイルをサイクル内に入れることができ
る。オイル加給工程を含めた全工程におけるスイ
ツチ５，６、電磁開閉弁７，８，９，１１，１
６，１８、タイマ２１，２２，２３の動作を工程
順に第４図に示す。リークテスト工程においてガ
スもれがあると、第二充填工程の回路は切れるの
で、オイル加給も行われない。 In the apparatus of the present invention, oil replenishment can be performed simultaneously with refrigerant gas injection. At the same time as the engine start lamp 26 lights up, the electromagnetic on-off valve 18 opens, the oil replenishment timer 23 operates, and the oil pump 19 starts. The oil pump 19 sucks oil from the oil tank 20, pressurizes it to about 5 kg/cm 2 , and flows into the cycle via the electromagnetic on-off valve 18 and the check valve 25. By adjusting the operating time of the oil replenishment timer 23, an appropriate amount of oil can be put into the cycle. Switches 5, 6, electromagnetic on-off valves 7, 8, 9, 11, 1 in all processes including oil supply process
The operations of timers 6, 18, and timers 21, 22, and 23 are shown in FIG. 4 in the order of steps. If there is a gas leak in the leak test process, the circuit for the second filling process will be cut off, and oil will not be added.
実施例の装置はリークテストのための真空引き
冷媒注入の反復操作を必要としない冷媒ガス注入
装置に組込まれたものであるが、本発明の装置は
従来の方式の冷媒ガス注入装置、例えば真空引き
と冷媒注入を反復する注入装置にも簡単に組込む
ことができる。 Although the device of the embodiment is incorporated into a refrigerant gas injection device that does not require repeated operations of evacuation and refrigerant injection for leak testing, the device of the present invention is incorporated into a refrigerant gas injection device of a conventional type, such as a vacuum It can also be easily incorporated into an injection device that repeats refrigerant injection and refrigerant injection.
第１図及び第２図は本発明の一実施例の装置の
基本的な流体回路及びシーケンス電気回路をそれ
ぞれ示す図、第３図は第１図及び第２図に示すク
ーラサイクルの内圧の変化を工程順に示す図、第
４図は第１図及び第２図の装置の回路要素の動作
を工程順に示す図である。
１：高圧側ジヨイント、２：低圧側ジヨイン
ト、５：圧力スイツチ、６：真空スイツチ、７：
第一電磁開閉弁、８：第二電磁開閉弁、１０：真
空ポンプ、１１：第四電磁開閉弁、１３：冷媒
槽、１７：蒸発器、１８：第六電磁開閉弁、１
９：オイルポンプ、２１：真空引き用タイマ、２
２：リークテスト用タイマ、２３：オイル加給用
タイマ。
Figures 1 and 2 are diagrams showing the basic fluid circuit and sequence electric circuit of an apparatus according to an embodiment of the present invention, respectively, and Figure 3 is a diagram showing changes in the internal pressure of the cooler cycle shown in Figures 1 and 2. FIG. 4 is a diagram showing the operation of the circuit elements of the apparatus of FIGS. 1 and 2 in order of steps. 1: High pressure side joint, 2: Low pressure side joint, 5: Pressure switch, 6: Vacuum switch, 7:
First electromagnetic on-off valve, 8: Second electromagnetic on-off valve, 10: Vacuum pump, 11: Fourth electromagnetic on-off valve, 13: Refrigerant tank, 17: Evaporator, 18: Sixth electromagnetic on-off valve, 1
9: Oil pump, 21: Vacuuming timer, 2
2: Leak test timer, 23: Oil replenishment timer.
Claims (1)
ツサの低圧側に接続される冷媒注入側管路を備え
た冷媒ガス注入装置において、前記冷媒注入側管
路に電磁開閉弁を介してオイルポンプの吐出口を
接続し、前記オイルポンプの始動と前記電磁開閉
弁の開放を前記コンプレツサの始動に同期させる
電気回路を設け、前記電気回路に前記オイルポン
プの停止と前記電磁開閉弁の閉止を行う調整可能
なタイマを設け、前記コンプレツサを始動させて
冷媒をクーラに注入する工程において所定の時間
オイルが共に加給されるようにしたことを特徴と
してなるクーラのオイル加給装置。 ２ 電磁開閉弁に逆止弁を直列に接続したことを
特徴としてなる特許請求の範囲第１項記載のクー
ラのオイル加給装置。[Scope of Claims] 1. A refrigerant gas injection device comprising a refrigerant tank and a refrigerant injection line connected from the refrigerant tank to the low pressure side of a compressor of a cooler, in which an electromagnetic shut-off valve is provided in the refrigerant injection line. An electric circuit is provided, which connects the discharge port of the oil pump via the oil pump, and synchronizes the start of the oil pump and the opening of the electromagnetic on-off valve with the start of the compressor, and the electric circuit has a connection between the oil pump and the electromagnetic on-off valve. An oil replenishing device for a cooler, characterized in that an adjustable timer is provided for closing the compressor, and oil is replenished for a predetermined period of time in the process of starting the compressor and injecting refrigerant into the cooler. 2. The oil replenishing device for a cooler according to claim 1, characterized in that a check valve is connected in series to the electromagnetic on-off valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4123680A JPS56138665A (en) | 1980-04-01 | 1980-04-01 | Oil feeder for cooler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4123680A JPS56138665A (en) | 1980-04-01 | 1980-04-01 | Oil feeder for cooler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56138665A JPS56138665A (en) | 1981-10-29 |
| JPS6310351B2 true JPS6310351B2 (en) | 1988-03-05 |
Family
ID=12602778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4123680A Granted JPS56138665A (en) | 1980-04-01 | 1980-04-01 | Oil feeder for cooler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56138665A (en) |
-
1980
- 1980-04-01 JP JP4123680A patent/JPS56138665A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56138665A (en) | 1981-10-29 |
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