JP3218140U

JP3218140U - Refrigerant liquid hammer impact reduction device for refrigeration cycle.

Info

Publication number: JP3218140U
Application number: JP2018001423U
Authority: JP
Inventors: 義憲安岡
Original assignee: 義憲安岡
Priority date: 2018-03-30
Filing date: 2018-03-30
Publication date: 2018-09-27
Anticipated expiration: 2028-03-30

Abstract

【課題】冷凍設備の冷凍サイクルにおいて、電磁弁と膨張弁の間で生ずる冷媒の液ハンマー現象による衝撃を軽減する冷凍装置を提供する。
【解決手段】圧縮機、凝縮器、電磁弁、膨張弁、および蒸発器の順で配管接続され冷媒が循環する冷凍サイクルにおいて、電磁弁と膨張弁の間に、気体の冷媒を封じこめる構造を持った冷媒液ハンマー衝撃軽減装置を取り付ける。電磁弁が開いた時に液体の冷媒が軽減装置の入口側６ｃから出口側６ｄを経て膨張弁に衝突する、それと同時に隙間６ｅの液体の冷媒が密封容器６ａの空間６ｂに気体の冷媒を封じ込める。その封じ込められた気体の冷媒が持つ圧縮性で衝突の衝撃を吸収し軽減することができる。
【選択図】図１There is provided a refrigeration apparatus for reducing an impact caused by a liquid hammer phenomenon of a refrigerant generated between an electromagnetic valve and an expansion valve in a refrigeration cycle of a refrigeration facility.
In a refrigeration cycle in which a refrigerant is circulated by connecting a pipe in the order of a compressor, a condenser, a solenoid valve, an expansion valve, and an evaporator, a structure in which a gaseous refrigerant is sealed between the solenoid valve and the expansion valve. Install the refrigerant hammer impact mitigation device. When the solenoid valve is opened, the liquid refrigerant collides with the expansion valve from the inlet side 6c of the mitigation device through the outlet side 6d. The compressive nature of the contained gaseous refrigerant can absorb and reduce the impact of collision.
[Selection] Figure 1

Description

本考案は、冷凍サイクルの電磁弁が開いたときに膨張弁との間で生じる液ハンマー現象による衝撃の軽減に関するものである。 The present invention relates to a reduction in impact due to a liquid hammer phenomenon that occurs between an expansion valve and a solenoid valve of a refrigeration cycle.

近年多く使用されるようになったフロンガス冷媒は、従来の冷媒より運転圧力が高く電磁弁と膨張弁との間で生ずる液ハンマーによる衝撃は以前より格段大きくなった。それに伴い冷媒配管や機器の損傷が多くなり、設備の信頼性が下がり、フロンガスの漏れも多くなっている。上記の問題を解決するためすでに、電磁弁を使用しなくてもよい電子膨張弁、電磁弁と膨張弁を一体化したもの、電磁弁にバイパス回路を設け均圧させるもの、電磁弁の入口側の液冷媒管にヒーターを付け液冷媒の一部を気化させるもの、電磁弁と膨張弁の間の冷媒管に大きな空間を設けるもの等が提案されている。 Freon gas refrigerants that have been used frequently in recent years have a higher operating pressure than conventional refrigerants, and the impact caused by a liquid hammer between a solenoid valve and an expansion valve has become much greater than before. Along with this, damage to refrigerant piping and equipment increases, the reliability of the equipment decreases, and the leakage of CFCs also increases. In order to solve the above problems, an electronic expansion valve that does not require the use of a solenoid valve, an integrated solenoid valve and expansion valve, a solenoid valve with a bypass circuit that equalizes pressure, the solenoid valve inlet side There have been proposed one in which a heater is attached to the liquid refrigerant pipe to vaporize a part of the liquid refrigerant, and one in which a large space is provided in the refrigerant pipe between the electromagnetic valve and the expansion valve.

特開２０１５−０２８４２３号公報Japanese Patent Laying-Open No. 2015-028423 特開２０１３−０５３８１３号公報JP 2013-053813 A 特開２０１２−２１５３０９号公報JP 2012-215309 A 特開平０８−２３３３７９号公報Japanese Patent Laid-Open No. 08-233379 特開平０８−０３５７４６号公報Japanese Patent Laid-Open No. 08-035746

液ハンマー衝撃の防止軽減を特別な機器や複雑な機器を使用せず、また既存の設備にも容易に追加でき費用も安価であるものが求められる。 There is a need to reduce the liquid hammer impact without using special equipment or complicated equipment, and can be easily added to existing equipment and at low cost.

上記の課題を解決するために、本考案は、冷凍設備において圧縮機、凝縮器、電磁弁、膨張弁、蒸発器等で構成される冷凍サイクルの、電磁弁と膨張弁の間にシンプルで安価な液ハンマーの衝撃軽減装置（以下、軽減装置と表記する）を取り付けることにより、上記の課題を解決するものである。 In order to solve the above problems, the present invention is simple and inexpensive between a solenoid valve and an expansion valve in a refrigeration cycle comprising a compressor, a condenser, a solenoid valve, an expansion valve, an evaporator, etc. in a refrigeration facility. The above-mentioned problem is solved by attaching an impact reducing device for a liquid hammer (hereinafter referred to as a reducing device).

この軽減装置は入口と出口の接続口を持ち、中に空間を設けた密封容器である。電磁弁が開いたときに、液体のフロンガスが気体のフロンガスを、中の空間に押しやり封じ込める構造になっている。その封じ込められた気体の持つ圧縮性で、液ハンマー現象により生ずる衝撃を吸収し軽減する装置である。 This mitigation device is a sealed container having a connection port between an inlet and an outlet and having a space therein. When the solenoid valve is opened, the liquid chlorofluorocarbon gas pushes the gas chlorofluorocarbon gas into the inside space and seals it. It is a device that absorbs and reduces the impact caused by the liquid hammer phenomenon with the compressibility of the contained gas.

本考案の軽減装置は構造が簡単であるため、設置スペースが小さく設置時に伴う手間や設置後のトラブルが少ないうえ、費用が安価で新設や既設の冷凍設備を問わず容易に採用することが出来る。採用することにより、冷凍設備の信頼性が向上し商品のロスやメンテナンス費用の削減も期待でき、フロンガスの漏れ件数も減少し、環境保護にもつながる。 Since the mitigation device of the present invention has a simple structure, the installation space is small, so there is little trouble and trouble after installation, and the cost is low, so it can be easily adopted regardless of whether it is newly installed or existing refrigeration equipment. . By adopting it, reliability of the refrigeration equipment can be improved, product loss and maintenance costs can be reduced, the number of chlorofluorocarbon leaks can be reduced, and environmental protection can be achieved.

本考案の軽減装置の断面図である。It is sectional drawing of the mitigation apparatus of this invention. 本考案の軽減装置の取り付け位置を記入した基本冷凍サイクル図である。It is the basic refrigeration cycle figure which filled in the attachment position of the mitigation device of this invention.

従来の、冷凍サイクル内の状態を図２に従って説明すると、冷却運転時は圧縮機１から凝縮器２までは高圧で気体の冷媒が、凝縮器２から膨張弁４までは高圧で液体の冷媒が、膨張弁４から蒸発器５までは低圧で液体と気体の混合した冷媒が、蒸発器５から圧縮機１までは低圧で気体の冷媒である。なお、冷却停止や除霜等で電磁弁３が閉じている時は、電磁弁３から圧縮機１までは低圧で気体の冷媒になる。 The conventional state in the refrigeration cycle will be described with reference to FIG. 2. During the cooling operation, a high-pressure gaseous refrigerant is supplied from the compressor 1 to the condenser 2, and a high-pressure liquid refrigerant is supplied from the condenser 2 to the expansion valve 4. From the expansion valve 4 to the evaporator 5, a refrigerant in which a liquid and a gas are mixed at a low pressure is a low-pressure gas refrigerant from the evaporator 5 to the compressor 1. When the solenoid valve 3 is closed due to cooling stop or defrosting, the solenoid valve 3 to the compressor 1 becomes a low-pressure gaseous refrigerant.

このような従来の冷凍サイクルでは、電磁弁３から膨張弁４の間は直接つながっているので、冷却開始時や除霜終了等で電磁弁３が開いた瞬間に高圧で液体の冷媒が勢いよく流れ込み、膨張弁４のノズル部に衝突する。その時に液ハンマー現象による衝撃が生じる。 In such a conventional refrigeration cycle, since the solenoid valve 3 and the expansion valve 4 are directly connected, the liquid refrigerant at high pressure vigorously at the moment when the solenoid valve 3 is opened at the start of cooling or at the end of defrosting. It flows in and collides with the nozzle part of the expansion valve 4. At that time, an impact due to the liquid hammer phenomenon occurs.

本考案の軽減装置６は電磁弁３と膨張弁４の間に設ける。本考案の構造を図１に従って説明すると、軽減装置６は広い空間６ｂを持った密封容器６ａで、冷媒管サイズは出口側６ｄより入口側６ｃの方が細いサイズになっている。内部の構造は出口側６ｄから伸びた管の内側に入口側６ｃから伸びた管が挿入されていて、その挿入されている部分は僅かな隙間６ｅが出来るようになっている。 The mitigation device 6 of the present invention is provided between the solenoid valve 3 and the expansion valve 4. The structure of the present invention will be described with reference to FIG. 1. The mitigation device 6 is a sealed container 6a having a wide space 6b, and the refrigerant pipe size is narrower on the inlet side 6c than on the outlet side 6d. The internal structure is such that a tube extending from the inlet side 6c is inserted inside the tube extending from the outlet side 6d, and a small gap 6e is formed in the inserted portion.

本考案の軽減装置６を取り付けた場合の、冷凍サイクル内の状態を図１と図２に従って説明すると、電磁弁３が閉じている時は電磁弁３から軽減装置６、膨張弁４、蒸発器５、圧縮機１までは低圧で気体の冷媒になっている。この状態の時に、電磁弁３が開くと高圧で液体の冷媒が軽減装置６の入口側６ｃから出口側６ｄを経て勢いよく流れ込み膨張弁４のノズル部に衝突する。同時に隙間６ｅを液体の冷媒が逆方向に流れ、密封容器６ａの空間６ｂに気体の冷媒を押しやり、封じ込める。空間６ｂに封じ込まれた気体の冷媒が持つ圧縮性で、先の衝突により生じた衝撃を吸収し軽減することが出来る。 The state in the refrigeration cycle when the mitigation device 6 of the present invention is attached will be described with reference to FIGS. 1 and 2. When the solenoid valve 3 is closed, the mitigation device 6, expansion valve 4, and evaporator are removed from the solenoid valve 3. 5. The compressor 1 is a low-pressure gaseous refrigerant. In this state, when the electromagnetic valve 3 is opened, a high-pressure liquid refrigerant flows from the inlet side 6c of the mitigation device 6 through the outlet side 6d and collides with the nozzle portion of the expansion valve 4. At the same time, the liquid refrigerant flows through the gap 6e in the opposite direction, and the gaseous refrigerant is pushed into the space 6b of the sealed container 6a to be contained. Due to the compressibility of the gaseous refrigerant sealed in the space 6b, it is possible to absorb and reduce the impact caused by the previous collision.

また、電磁弁３の弁口径サイズや、電磁弁３から軽減装置６までの冷媒管サイズを必要最小限の物を使用することで、より衝撃軽減効果が得られる。 Further, the impact reducing effect can be further obtained by using the minimum necessary diameter size of the solenoid valve 3 and the refrigerant pipe size from the solenoid valve 3 to the mitigation device 6.

１圧縮機
２凝縮器
３電磁弁
４膨張弁
５蒸発器
６軽減装置
６ａ密封容器
６ｂ空間
６ｃ入口側
６ｄ出口側
６ｅ隙間DESCRIPTION OF SYMBOLS 1 Compressor 2 Condenser 3 Electromagnetic valve 4 Expansion valve 5 Evaporator 6 Mitigation device 6a Sealed container 6b Space 6c Inlet side 6d Outlet side 6e Clearance

Claims

圧縮機、凝縮器、電磁弁、膨張弁、蒸発器等で構成される冷凍サイクルで、電磁弁と膨張弁の間に取り付ける冷媒の液ハンマー衝撃軽減を目的とした装置。 A device designed to reduce the impact of refrigerant hammer on a refrigerant installed between a solenoid valve and an expansion valve in a refrigeration cycle comprising a compressor, a condenser, a solenoid valve, an expansion valve, an evaporator, and the like.