JP2849489B2 - Gas filling device for temperature-sensitive cylinder of expansion valve - Google Patents
Gas filling device for temperature-sensitive cylinder of expansion valveInfo
- Publication number
- JP2849489B2 JP2849489B2 JP3063651A JP6365191A JP2849489B2 JP 2849489 B2 JP2849489 B2 JP 2849489B2 JP 3063651 A JP3063651 A JP 3063651A JP 6365191 A JP6365191 A JP 6365191A JP 2849489 B2 JP2849489 B2 JP 2849489B2
- Authority
- JP
- Japan
- Prior art keywords
- refrigerant
- gas
- temperature
- tank
- 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.)
- Expired - Fee Related
Links
Landscapes
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【0001】[0001]
【産業上の利用分野】この発明は、冷凍サイクル中に設
けられる膨張弁の感温筒に冷媒ガスと不活性ガスの混合
ガスを充填するための膨張弁の感温筒に対するガス充填
装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas filling device for an expansion valve, which is for filling a mixed gas of a refrigerant gas and an inert gas into the expansion valve provided in a refrigeration cycle.
【0002】感温筒には、一般にその冷凍サイクルで用
いられる冷媒と同じ冷媒ガスが充填される。しかし、蒸
発器の蒸発圧力によって膨張弁が開くときの加熱度を変
えたい場合には、冷凍サイクルに用いられる冷媒とは別
の冷媒ガスと不活性ガスを適切な圧力比で混合した混合
ガスを、感温筒に充填することが行われる。[0002] The temperature-sensitive cylinder is generally filled with the same refrigerant gas as the refrigerant used in the refrigeration cycle. However, when it is desired to change the degree of heating when the expansion valve opens due to the evaporation pressure of the evaporator, a mixed gas obtained by mixing a refrigerant gas different from the refrigerant used in the refrigeration cycle and an inert gas at an appropriate pressure ratio is used. , Filling the temperature-sensitive cylinder.
【0003】[0003]
【従来の技術】図2は、従来のガス充填装置の第1の例
を示しており、膨張弁の感温筒51に接続された主弁5
2に、冷媒ガス供給管53と不活性ガス供給管54とが
並列に接続され、さらに感温筒51内を予め空にするた
めの真空ポンプ55がそれに並列に接続され、その各々
の管路の途中に弁56,57,58が接続されている。
59は不活性ガスの充填圧力を調整するための圧力調整
器である。2. Description of the Related Art FIG. 2 shows a first example of a conventional gas filling device, in which a main valve 5 connected to a temperature-sensitive cylinder 51 of an expansion valve.
2, a refrigerant gas supply pipe 53 and an inert gas supply pipe 54 are connected in parallel, and a vacuum pump 55 for previously evacuating the temperature-sensitive cylinder 51 is connected in parallel to the pipes. Are connected to valves 56, 57, 58 in the middle of the process.
Reference numeral 59 denotes a pressure regulator for adjusting the filling pressure of the inert gas.
【0004】このようなガス充填装置によって冷媒ガス
と不活性ガスの混合ガスを感温筒51に充填する際に
は、まず主弁52と真空ポンプ用弁58とを開いて感温
筒51内を真空にした後、真空ポンプ用弁58を閉じ、
冷媒ガス用弁56を開いて冷媒ガスを感温筒51内に充
填する。When a gas mixture of a refrigerant gas and an inert gas is charged into the temperature sensing cylinder 51 by such a gas filling apparatus, first, the main valve 52 and the vacuum pump valve 58 are opened to open the inside of the temperature sensing cylinder 51. Is evacuated, the valve 58 for the vacuum pump is closed,
The refrigerant gas valve 56 is opened to charge the refrigerant gas into the temperature-sensitive cylinder 51.
【0005】感温筒51内に対する冷媒ガスの充填が完
了したら、主弁52と冷媒ガス用弁56を閉じて真空ポ
ンプ用弁58を開き、途中の管路内の冷媒ガスを除去す
る。When the charging of the refrigerant gas into the temperature-sensitive cylinder 51 is completed, the main valve 52 and the refrigerant gas valve 56 are closed, the vacuum pump valve 58 is opened, and the refrigerant gas in the middle of the pipeline is removed.
【0006】そして次には、真空ポンプ用弁58を閉
じ、不活性ガス用弁57を開いて不活性ガスを感温筒5
1内に充填する。ただし、この充填時間は0.5秒程度
の瞬間的なものとしなければならない。そうしないと、
感温筒51内にすでに充填されている冷媒ガスが逆流し
て感温筒51内から漏れ出してしまうからである。その
動作が終了したら、総ての弁52,56,57,58を
完全に閉じて、混合ガスの充填作業を終了する。Next, the vacuum pump valve 58 is closed, and the inert gas valve 57 is opened to supply the inert gas to the temperature-sensitive cylinder 5.
Fill into 1. However, this filling time must be instantaneous of about 0.5 seconds. If I do not,
This is because the refrigerant gas already filled in the temperature sensing tube 51 flows backward and leaks out of the temperature sensing tube 51. When the operation is completed, all the valves 52, 56, 57, 58 are completely closed, and the charging operation of the mixed gas is completed.
【0007】図3は、従来のガス充填装置の第2の例を
示しており、冷媒ガス供給管53と不活性ガス供給管5
4とに各々圧力調整器60,59を介挿して、冷媒ガス
タンク61と不活性ガスタンク62とに、各々所定圧の
冷媒ガスと不活性ガスを蓄えている。FIG. 3 shows a second example of a conventional gas filling apparatus, in which a refrigerant gas supply pipe 53 and an inert gas supply pipe 5 are provided.
4 are respectively interposed with pressure regulators 60 and 59, and a refrigerant gas tank 61 and an inert gas tank 62 store a refrigerant gas and an inert gas of a predetermined pressure, respectively.
【0008】そして、大気中に混合ガスを放出するため
の混合ガス放出弁63と冷媒ガス用弁56及び不活性ガ
ス用弁57の各弁の開度の比によって、感温筒51に充
填される混合ガス中の冷媒ガスと不活性ガスとの混合比
が一定になるようにしている。The temperature-sensitive cylinder 51 is filled according to the ratio of the opening ratio of the mixed gas discharge valve 63 for discharging the mixed gas to the atmosphere, the refrigerant gas valve 56, and the inert gas valve 57. The mixing ratio between the refrigerant gas and the inert gas in the mixed gas is constant.
【0009】[0009]
【発明が解決しようとする課題】しかし、上述の従来の
第1のガス充填装置においては、充填作業工程が複雑で
あり、また不活性ガス用弁57を開く時間を非常に厳密
に制御する必要がある等、取り扱いがシビアで、混合比
が不正確になりがちな欠点があった。However, in the above-mentioned first conventional gas filling apparatus, the filling operation is complicated, and the time for opening the inert gas valve 57 must be very strictly controlled. There was a drawback that handling was severe and the mixing ratio tended to be inaccurate.
【0010】また、上述の従来の第2のガス充填装置に
おいては、混合比を安定させるために混合ガスを大気中
に放出するので、極めて不経済であると同時に、近年重
大な問題になっている環境破壊につながる欠点があっ
た。In the above-mentioned second conventional gas filling apparatus, the mixed gas is discharged into the atmosphere in order to stabilize the mixing ratio, which is extremely uneconomical and has become a serious problem in recent years. There was a drawback that led to environmental destruction.
【0011】そこで本発明は、取り扱いが容易で、しか
も冷媒ガス等を大気中に放出することなく、混合比を正
確に制御して冷媒ガスと不活性ガスの混合ガスを膨張弁
の感温筒に充填することができるガス充填装置を提供す
ることを目的とする。Therefore, the present invention provides a temperature-sensitive cylinder for an expansion valve which is easy to handle, controls a mixture ratio of a refrigerant gas and an inert gas accurately and does not discharge a refrigerant gas or the like to the atmosphere. It is an object of the present invention to provide a gas filling device capable of filling a gas.
【0012】[0012]
【課題を解決するための手段】上記の目的を達成するた
め、本発明の膨張弁の感温筒に対するガス充填装置は、
下部に液状の冷媒を収容してそれより上部において膨張
弁の感温筒に接続される冷媒タンクと、上記冷媒の飽和
蒸気圧が上記感温筒に充填する冷媒ガス圧と合致する温
度に上記冷媒タンクの温度を制御するための冷媒タンク
温度制御手段と、上記感温筒に充填する不活性ガスを収
容して上記冷媒タンクに接続された不活性ガスタンク
と、上記不活性ガスタンクの内圧を、感温筒に充填する
不活性ガス圧と冷媒ガス圧との和になるように制御する
ための圧力制御手段と、上記不活性ガスタンクから上記
冷媒タンクへのみガスが流れ得るように、上記不活性ガ
スタンクと上記冷媒タンクとを接続する接続管の間に接
続された逆止弁とを設けたことを特徴とする。In order to achieve the above object, a gas filling device for a temperature-sensitive cylinder of an expansion valve according to the present invention is provided.
A refrigerant tank containing a liquid refrigerant at a lower portion and connected to a temperature sensing cylinder of an expansion valve at an upper portion thereof, and a temperature at which a saturated vapor pressure of the refrigerant matches a refrigerant gas pressure filling the temperature sensing cylinder. Refrigerant tank temperature control means for controlling the temperature of the refrigerant tank, an inert gas tank containing an inert gas to be filled in the temperature-sensitive cylinder and connected to the refrigerant tank, and the internal pressure of the inert gas tank, Pressure control means for controlling the sum of the inert gas pressure and the refrigerant gas pressure to be charged into the thermosensitive cylinder; and the inert gas so that gas can flow only from the inert gas tank to the refrigerant tank. A check valve connected between a connection pipe connecting the gas tank and the refrigerant tank is provided.
【0013】[0013]
【作用】冷媒タンク内において、冷媒ガスの圧力は、タ
ンク内に冷媒液が存在している限りは、冷媒タンク温度
制御手段によって制御される温度における飽和蒸気圧を
保ち、不活性ガスの圧力は、冷媒ガスの圧力と不活性ガ
スタンクの内圧との差圧を保つ。In the refrigerant tank, the pressure of the refrigerant gas keeps the saturated vapor pressure at the temperature controlled by the refrigerant tank temperature control means as long as the refrigerant liquid exists in the tank, and the pressure of the inert gas becomes The pressure difference between the pressure of the refrigerant gas and the internal pressure of the inert gas tank is maintained.
【0014】[0014]
【実施例】図面を参照して実施例を説明する。An embodiment will be described with reference to the drawings.
【0015】図1において、冷凍サイクルの膨張弁の感
温筒1に接続された混合ガス充填管2には第1と第2の
主弁3,4が介装され、その両主弁3,4の間に真空ポ
ンプ5が接続されている。In FIG. 1, a mixed gas filling pipe 2 connected to a temperature sensing cylinder 1 of an expansion valve of a refrigeration cycle is provided with first and second main valves 3 and 4, both of which are disposed. Between them, a vacuum pump 5 is connected.
【0016】したがって、真空ポンプ用弁6を開いてお
いて、第1と第2の主弁3,4を開閉させることによっ
て、感温筒1内及び混合ガス充填管2内等を予め空にす
ることができる。そして、混合ガスを感温筒1に充填す
る際には、真空ポンプ用弁6は閉じておく。Therefore, by opening the vacuum pump valve 6 and opening and closing the first and second main valves 3 and 4, the interior of the temperature-sensitive cylinder 1 and the interior of the mixed gas filling pipe 2 and the like are previously emptied. can do. When filling the temperature-sensitive cylinder 1 with the mixed gas, the vacuum pump valve 6 is closed.
【0017】11は、下部に液状の冷媒(例えばブタ
ン)100を収容した冷媒タンクであり、混合ガス充填
管2の基端部が冷媒液面より上部に接続されている。Reference numeral 11 denotes a refrigerant tank containing a liquid refrigerant (for example, butane) 100 in the lower part, and the base end of the mixed gas filling pipe 2 is connected to the upper part of the liquid level of the refrigerant.
【0018】冷媒タンク11は、温度制御装置12によ
って所望の一定温度になるように温度管理されており、
冷媒タンク11内の冷媒液面より上部に存在する冷媒ガ
スの圧力Pは、その温度における飽和蒸気圧となる。そ
こで、温度制御装置12には、冷媒の飽和蒸気圧が感温
筒1に充填されるべき冷媒ガス圧と合致するように、冷
媒タンク11の温度を例えば摂氏25度に制御させてい
る。The temperature of the refrigerant tank 11 is controlled by a temperature controller 12 so as to be a desired constant temperature.
The pressure P of the refrigerant gas existing above the refrigerant liquid level in the refrigerant tank 11 becomes the saturated vapor pressure at that temperature. Therefore, the temperature control device 12 controls the temperature of the refrigerant tank 11 to, for example, 25 degrees Celsius so that the saturated vapor pressure of the refrigerant matches the refrigerant gas pressure to be charged into the temperature-sensitive cylinder 1.
【0019】14は、不活性ガス(例えば窒素)を収容
した不活性ガスタンクであり、図示されていない不活性
ガスボンベから不活性ガスの供給を受け、その途中に介
装された圧力調整弁15によって、不活性ガスタンク1
4内が一定圧力に維持される。その圧力Qは、冷媒タン
ク11内の冷媒ガスの圧力Pと感温筒1に充填されるべ
き不活性ガスの圧力Rとの和、即ちQ=P+Rである。Reference numeral 14 denotes an inert gas tank containing an inert gas (for example, nitrogen). The inert gas tank 14 is supplied with an inert gas from an inert gas cylinder (not shown), and is controlled by a pressure regulating valve 15 interposed therebetween. , Inert gas tank 1
4 is maintained at a constant pressure. The pressure Q is the sum of the pressure P of the refrigerant gas in the refrigerant tank 11 and the pressure R of the inert gas to be charged into the thermosensitive cylinder 1, that is, Q = P + R.
【0020】不活性ガスタンク14の容積は、冷媒タン
ク11の容積に比べて例えば100倍程度と非常に大き
く形成されており、両タンク11,14を接続する第1
の接続管17の途中には、不活性ガスタンク14側から
冷媒タンク11へのみガスが流れ得るように逆止弁18
が介装されており、第2の接続管20には、常時は閉じ
ていて、冷媒タンク11内の圧力(P+R)が不活性ガ
スタンク14内の圧力Qより大きくなったときにのみ開
いて両タンク11,14を連通させる電磁弁21が接続
されている。The capacity of the inert gas tank 14 is very large, for example, about 100 times as large as the capacity of the refrigerant tank 11.
A check valve 18 is provided in the middle of the connection pipe 17 so that gas can flow only from the inert gas tank 14 side to the refrigerant tank 11.
The second connection pipe 20 is always closed and opened only when the pressure (P + R) in the refrigerant tank 11 becomes higher than the pressure Q in the inert gas tank 14. An electromagnetic valve 21 that connects the tanks 11 and 14 is connected.
【0021】このように構成されたガス充填装置によれ
ば、冷媒タンク11内において、冷媒ガスの圧力Pは、
冷媒タンク11内に冷媒液100が存在している限り
は、温度制御装置12によって制御される温度における
飽和蒸気圧を保ち、不活性ガスの圧力Rは、冷媒ガスの
圧力Pと不活性ガスタンク14の内圧Qとの差圧R(R
=Q−P)を保つ。According to the gas filling apparatus thus constructed, the pressure P of the refrigerant gas in the refrigerant tank 11 is
As long as the refrigerant liquid 100 is present in the refrigerant tank 11, the saturated vapor pressure at the temperature controlled by the temperature control device 12 is maintained, and the inert gas pressure R is equal to the refrigerant gas pressure P and the inert gas tank 14 Differential pressure R (R
= QP).
【0022】したがって、感温筒1内と混合ガス充填管
2とを真空にした後真空ポンプ用弁6を閉じ、2つの主
弁3,4を開くだけで、冷媒タンク11内の圧力Pの冷
媒ガスと圧力(Q−P)の不活性ガスとが常に安定した
正確な混合比で感温筒1内に充填される。Therefore, after the interior of the temperature-sensitive cylinder 1 and the mixed gas filling pipe 2 are evacuated, the valve 6 for the vacuum pump is closed, and the two main valves 3 and 4 are opened. The refrigerant gas and the inert gas at the pressure (QP) are always filled into the temperature-sensitive cylinder 1 at a stable and accurate mixing ratio.
【0023】ただし、混合ガスの充填作業を行う初期な
どにおいて、冷媒タンク11の温度制御が安定していな
いときなどには、冷媒タンク11内の圧力が不活性ガス
タンク14内の圧力より高くなってしまうことがある。However, when the temperature control of the refrigerant tank 11 is not stable, for example, at the beginning of the operation of charging the mixed gas, the pressure in the refrigerant tank 11 becomes higher than the pressure in the inert gas tank 14. Sometimes.
【0024】そのような場合には、電磁弁21を開い
て、冷媒タンク11内の混合ガスを不活性ガスタンク1
4内に送る。このようにして冷媒タンク11内の圧力を
下げることによって、冷媒タンク11内の混合ガス中の
不活性ガスの圧力を、所定圧(Q−P)まで下げること
ができる。In such a case, the solenoid valve 21 is opened, and the mixed gas in the refrigerant tank 11 is supplied to the inert gas tank 1.
Send within 4. By reducing the pressure in the refrigerant tank 11 in this manner, the pressure of the inert gas in the mixed gas in the refrigerant tank 11 can be reduced to a predetermined pressure (QP).
【0025】なお、不活性ガスタンク14は、容積が冷
媒タンク11の容積に比べて充分に大きいので、上述の
ような混合ガスの流入によっては圧力の上昇はないもの
とみなすことができる。また、冷媒タンク11内の冷媒
ガスの圧力は常に飽和蒸気圧になるので、不活性ガスタ
ンク14に送り出された冷媒ガスが再び冷媒タンク11
に送り込まれても、冷媒タンク11内の冷媒ガス圧には
何ら影響を及ぼさない。Since the volume of the inert gas tank 14 is sufficiently larger than the volume of the refrigerant tank 11, it can be considered that the pressure does not increase due to the inflow of the mixed gas as described above. Further, since the pressure of the refrigerant gas in the refrigerant tank 11 always becomes the saturated vapor pressure, the refrigerant gas sent out to the inert gas tank 14 is again discharged into the refrigerant tank 11.
Does not affect the refrigerant gas pressure in the refrigerant tank 11 at all.
【0026】[0026]
【発明の効果】本発明の膨張弁の感温筒に対するガス充
填装置によれば、冷媒タンクの温度管理をするだけで、
冷媒タンク内の冷媒ガス圧と不活性ガス圧とを各々所定
の圧力に維持することができるので、その混合ガスを単
に感温筒内に移動させるという極めて容易な取り扱いに
よって、冷媒ガス又は不活性ガスを大気中に全く放出す
ることなく、冷媒ガスと不活性ガスの混合ガスを、常に
安定した正確な混合比で感温筒に充填することができる
優れた効果を有する。According to the gas filling device for the temperature sensing cylinder of the expansion valve of the present invention, the temperature of the refrigerant tank can be simply controlled.
Since the refrigerant gas pressure and the inert gas pressure in the refrigerant tank can be respectively maintained at predetermined pressures, the refrigerant gas or the inert gas can be easily handled by simply moving the mixed gas into the temperature-sensitive cylinder. It has an excellent effect that a mixed gas of a refrigerant gas and an inert gas can always be filled into a thermosensitive cylinder at a stable and accurate mixing ratio without releasing any gas into the atmosphere.
【図1】実施例の構成図である。FIG. 1 is a configuration diagram of an embodiment.
【図2】第1の従来例の構成図である。FIG. 2 is a configuration diagram of a first conventional example.
【図3】第2の従来例の構成図である。FIG. 3 is a configuration diagram of a second conventional example.
1 感温筒 11 冷媒タンク 12 温度制御装置 14 不活性ガスタンク 15 圧力調整弁 18 逆止弁 DESCRIPTION OF SYMBOLS 1 Thermosensitive cylinder 11 Refrigerant tank 12 Temperature control device 14 Inert gas tank 15 Pressure control valve 18 Check valve
Claims (1)
において膨張弁の感温筒に接続される冷媒タンクと、上
記冷媒の飽和蒸気圧が上記感温筒に充填する冷媒ガス圧
と合致する温度に上記冷媒タンクの温度を制御するため
の冷媒タンク温度制御手段と、上記感温筒に充填する不
活性ガスを収容して上記冷媒タンクに接続された不活性
ガスタンクと、上記不活性ガスタンクの内圧を、感温筒
に充填する不活性ガス圧と冷媒ガス圧との和になるよう
に制御するための圧力制御手段と、上記不活性ガスタン
クから上記冷媒タンクへのみガスが流れ得るように、上
記不活性ガスタンクと上記冷媒タンクとを接続する接続
管の間に接続された逆止弁とを設けたことを特徴とする
膨張弁の感温筒に対するガス充填装置。1. A refrigerant tank containing a liquid refrigerant in a lower part and connected to a temperature-sensitive cylinder of an expansion valve above the liquid refrigerant, and a refrigerant gas pressure filling the temperature-sensitive cylinder with a saturated vapor pressure of the refrigerant. A refrigerant tank temperature control means for controlling the temperature of the refrigerant tank to match the temperature, an inert gas tank containing an inert gas filled in the thermosensitive cylinder and connected to the refrigerant tank, Pressure control means for controlling the internal pressure of the gas tank to be the sum of the inert gas pressure and the refrigerant gas pressure to be filled in the temperature-sensitive cylinder, so that gas can flow only from the inert gas tank to the refrigerant tank And a check valve connected between a connection pipe connecting the inert gas tank and the refrigerant tank to the expansion valve.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3063651A JP2849489B2 (en) | 1991-03-28 | 1991-03-28 | Gas filling device for temperature-sensitive cylinder of expansion valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3063651A JP2849489B2 (en) | 1991-03-28 | 1991-03-28 | Gas filling device for temperature-sensitive cylinder of expansion valve |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH04302968A JPH04302968A (en) | 1992-10-26 |
JP2849489B2 true JP2849489B2 (en) | 1999-01-20 |
Family
ID=13235471
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3063651A Expired - Fee Related JP2849489B2 (en) | 1991-03-28 | 1991-03-28 | Gas filling device for temperature-sensitive cylinder of expansion valve |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2849489B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101858486A (en) * | 2010-05-18 | 2010-10-13 | 浙江新劲空调设备有限公司 | Gas filling machine of automobile expansion valve and application method thereof |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102305504B (en) * | 2011-08-02 | 2013-02-13 | 中国计量学院 | Automatic cross filling device and filling method of thermostatic expansion valve power head |
-
1991
- 1991-03-28 JP JP3063651A patent/JP2849489B2/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101858486A (en) * | 2010-05-18 | 2010-10-13 | 浙江新劲空调设备有限公司 | Gas filling machine of automobile expansion valve and application method thereof |
CN101858486B (en) * | 2010-05-18 | 2011-09-28 | 浙江新劲空调设备有限公司 | Gas filling machine of automobile expansion valve and application method thereof |
Also Published As
Publication number | Publication date |
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JPH04302968A (en) | 1992-10-26 |
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