JP2005114184A - Refrigerant filling device and refrigerant filling method - Google Patents

Refrigerant filling device and refrigerant filling method Download PDF

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JP2005114184A
JP2005114184A JP2003345140A JP2003345140A JP2005114184A JP 2005114184 A JP2005114184 A JP 2005114184A JP 2003345140 A JP2003345140 A JP 2003345140A JP 2003345140 A JP2003345140 A JP 2003345140A JP 2005114184 A JP2005114184 A JP 2005114184A
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refrigerant
heat exchanger
filling
compressor
supercooling
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JP4110276B2 (en
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Shinichiro Nagamatsu
Koji Naito
Kenichi Nakamura
Kazumiki Urata
憲一 中村
宏治 内藤
信一郎 永松
和幹 浦田
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Hitachi Ltd
株式会社日立製作所
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    • 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
    • F25B2345/00Details for charging or discharging refrigerants; Service stations therefor
    • F25B2345/001Charging refrigerant to a cycle

Abstract

<P>PROBLEM TO BE SOLVED: To automatically fill an additional refrigerant amount proper for a setting state of an air conditioner to secure reliability of a refrigeration cycle. <P>SOLUTION: In this refrigerant filling device, a prescribed amount of refrigerant is filled into an outdoor unit, or the refrigerant is additionally filled, to the refrigeration cycle wherein the outdoor unit having a compressor 1, an outdoor heat exchanger 7, a decompressor 6 and a liquid receiver 5, and an indoor unit having an indoor heat exchanger 3 and a decompressor 4 are connected by piping. In the refrigerant filling device, a main flow part of a supercooling heat exchanger 9 having sub flow parts is disposed between the liquid receiver 7 of the outdoor unit and the indoor unit, one of the sub flow parts is connected to a refrigerant cylinder 50 through a refrigerant filling solenoid valve 14, the other is connected to a suction side of the compressor 1, and opening/closing of the refrigerant filling solenoid valve 14 is controlled in connection with a degree of supercooling of the refrigerant on a main flow part outlet side. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、空気調和装置及び空気調和装置内に冷媒を充填する冷媒充填装置に係り、特に空気調和装置の施工状態に対して適正な冷媒を自動で充填するものに好適である。 The present invention relates to a refrigerant filling apparatus for filling a refrigerant in an air conditioner and an air conditioner, it is preferable to those filling automatically the proper refrigerant particularly for construction state of the air conditioner.

空気調和装置の中でも特に室内機を複数台接続して成る多室形空気調和装置の場合は、室内機と室外機の設置状況としてビルの構造や管理面等から多種多様であるため、室外機に全冷媒量を充填して出荷することが不可能である。 For the case of a multi-room air conditioning apparatus comprising in particular connecting a plurality of indoor units among the air conditioner, there is a wide variety of indoor and building structures and administrative as installation situation of the outdoor unit or the like, the outdoor unit it is impossible to ship by filling the entire refrigerant quantity in. このため、施工現地において必ず冷媒を追加充填する作業が生じる。 For this reason, the results work to be sure to add filling the refrigerant in the construction site.
従来、室外機及び室内機の各容量、室外機と室内機間を接続する接続配管の配管長さの情報と、室外機に対する室内機の高さ位置情報とを元に、室外機容量及び室内機容量それぞれに対して決められた接続配管径と前記配管径の単位長さ当り及び室内機容量により決定される追加冷媒充填量と、室外機に対する室内機の高さに対して決められる追加冷媒充填量の補正係数から、多室形空気調和装置の施工状況に適した追加冷媒充填量を演算し、冷媒ボンベを計量器等で測定しながら冷媒を充填することが知られ例えば、特許文献1に記載されている。 Conventionally, the capacity of the outdoor unit and the indoor units, based on the pipe length of the information of the connection pipe connecting between the outdoor unit and the indoor units, the height position information of the indoor unit for the outdoor unit, the outdoor unit capacity and room and additional refrigerant charging amount and the connecting pipe diameter which is determined for each machine capacity is determined by the per unit length and the indoor unit capacity of the pipe diameter, additional refrigerant to be determined with respect to the height of the indoor unit for the outdoor unit from the correction coefficient of the filling amount, and calculates the additional refrigerant charge appropriate for installation status of multi-room air conditioning apparatus, is known to fill the refrigerant while measuring the refrigerant cylinder in the meter or the like, for example, Patent Document 1 It is described in.
また、冷凍サイクルの圧縮機吐出側配管と吸入側配管とを接続するバイパス回路を設け、バイパス回路には余剰冷媒を貯留するための冷媒貯留器と吐出側配管から冷媒貯留器に流入する回路と冷媒貯留器から吸入側配管に流出する冷媒回路それぞれに開閉弁を設けるとともに、冷凍サイクル内の冷媒量が適正か否かを判定する冷媒量判定手段を設け、冷媒量判定手段により、冷媒量不足と検知された場合は、冷媒貯留器から圧縮機吸入側配管にバイパスする回路の開閉弁を開いて、冷媒貯留器内の冷媒を圧縮機吸入側に放出することで空気調和機内の冷媒量を調整することが特許文献2に記載されている。 Further, a compressor discharge side piping of the refrigeration cycle a bypass circuit provided for connecting the suction pipe, the bypass circuit and a circuit which flows into the refrigerant reservoir from the discharge side pipe and a refrigerant reservoir for storing the surplus refrigerant provided with a closing valve in each refrigerant circuit flowing out to the suction pipe from the refrigerant reservoir, the refrigerant quantity determining means determines a proper or not the refrigerant quantity in the refrigerant cycle is provided, the refrigerant quantity judging means, insufficient refrigerant amount and if it is detected, by opening the closing valve of a circuit that bypasses the compressor intake piping from the refrigerant reservoir, the refrigerant amount of the air-conditioning machine by releasing refrigerant in the refrigerant reservoir to the suction side of the compressor adjusting is described in Patent Document 2.

特開平11−63745号公報(図8) JP-11-63745 discloses (Fig. 8)

特開平9−273839号公報(図1) JP-9-273839 discloses (Fig. 1)

上記特許文献1のものでは、追加冷媒充填量の値は追加冷媒量演算手段で計算されるが、この追加冷媒量分を充填するのは作業者であり、人為的ミスなどの発生により冷媒過少状態や冷媒過多の状態となる恐れがある。 Intended in Patent Document 1, the value of the additional refrigerant charging amount is calculated by adding the refrigerant quantity calculating means, a worker to fill the additional refrigerant amount, the refrigerant under-the occurrence of human error there is a possibility that the state of the state and the refrigerant excessive. また、冷凍サイクルの低圧側サービスポートに冷媒ボンベを接続して冷媒充填を行う場合は、圧縮機吸入側に液冷媒が戻りやすくなり、圧縮機の故障を招く。 Further, when connecting the refrigerant cylinder to the low pressure side service port of the refrigeration cycle performed refrigerant filling, liquid refrigerant to the compressor suction side tends return, leading to failure of the compressor.
また、特許文献2のものでは、冷媒を追加充填する場合に冷媒貯留器から圧縮機吸入側に冷媒が流出するため圧縮機吸入側に液冷媒が戻りやすくなり、圧縮機の故障を招く恐れがある。 Further, the intended Patent Document 2, the refrigerant to the compressor suction side from the refrigerant reservoir tends liquid refrigerant returns to the suction side of the compressor to flow out when adding filling the refrigerant, can lead to failure of the compressor is there. さらに、圧縮機吸入側への液戻りを防止するために冷媒貯留器の頭頂部からガス冷媒を圧縮機吸入側に戻すようにしても、ガス冷媒の質量が軽いため冷媒量の調整に多大な時間を要する。 Furthermore, even if the top of the refrigerant reservoir to prevent liquid return to the compressor suction side to return the gas refrigerant to the compressor suction side, a great deal to adjust the amount of refrigerant for the mass of the gas refrigerant is light It takes time.

本発明の目的は、上記従来の技術課題を解決し、空気調和装置の設置状態に対して適正な追加冷媒量を自動で充填し、冷凍サイクルの信頼性を確保できる冷媒充填装置及び冷媒充填方法を提供することにある。 An object of the present invention shows the above solve the conventional technical problems, and filled automatically an appropriate additional refrigerant amount, the refrigerant filling apparatus can ensure the reliability of the refrigeration cycle and the refrigerant charging method with respect to the installation state of the air conditioner It is to provide a.

上記目的を達成するため本発明は、圧縮機、室外熱交換器、減圧装置、受液器を有する室外ユニットと、室内熱交換器、減圧装置を有する室内ユニットと、を配管接続した冷凍サイクルに対して、所定量の冷媒を室外ユニット内に充填、又は冷媒を追加充填する冷媒充填装置において、前記室外ユニットの受液器と室内ユニットの間に副流部を備えた過冷却熱交換器の主流部を配置し、前記副流部の一方は冷媒充填電磁弁を介して冷媒ボンベに、他方は前記圧縮機の吸入側に接続し、前記主流部出口側の冷媒過冷却度に関連して前記冷媒充填電磁弁の開閉を制御するものである。 The present invention for achieving the above object, a compressor, an outdoor heat exchanger, and an outdoor unit having a decompression device, a liquid receiver, an indoor heat exchanger, and an indoor unit having a decompression device, to the pipe connection refrigerating cycle in contrast, filled with a predetermined amount of the refrigerant in the outdoor unit, or the refrigerant charging device for additional charging refrigerant, the supercooling heat exchanger provided with a side stream portion between the liquid receiver and the indoor unit of the outdoor unit the main unit is disposed, wherein the refrigerant cylinder via a refrigerant filling solenoid valve is one of the auxiliary flow portion, the other is connected to the suction side of the compressor, in relation to the refrigerant supercooling degree of the main portion outlet and it controls the opening and closing of the refrigerant filling solenoid valve.

また、上記のものにおいて、前記受液器と前記過冷却熱交換器とを接続する配管から前記副流部の入口と前記冷媒充填電磁弁の間にバイパスするバイパス回路を設け、該バイパス回路に過冷却バイパス膨張弁を設けたことが望ましい。 Further, in those described above, a bypass circuit for bypassing the pipe that connects the supercooling heat exchanger and the receiver between the inlet and the refrigerant filling solenoid valve of the auxiliary flow unit, to said bypass circuit it is desirable to provided the subcooling bypass expansion valve.
さらに、上記のものにおいて、前記冷媒充填電磁弁の上流側に阻止弁を設け、前記冷媒充填電磁弁と前記阻止弁の間から前記主流部の出口側に冷媒が流れる第2のバイパス回路を設けたことが望ましい。 Further, provided in one of the above, the gate valve provided on the upstream side of the refrigerant charging solenoid valve, the second bypass circuit through which the refrigerant flows to the outlet side of the main portion from between said blocking valve and the refrigerant filling solenoid valve and it is desirable.

さらに、上記のものにおいて、前記圧縮機の吐出側に設けられた吐出圧力センサと、前記主流部の出口側に設けられた温度サーミスタとを備え、前記吐出圧力センサによる圧力値から飽和液温度を演算し、前記温度サーミスタの出力値との差を求めることが望ましい。 Furthermore, in those described above, a discharge pressure sensor provided on the discharge side of the compressor, and a temperature thermistor provided on the outlet side of the main portion, the saturated liquid temperature from the pressure value by the discharge pressure sensor calculated, it is desirable to determine the difference between the output value of the temperature thermistor.
さらに、上記のものにおいて、前記圧縮機吐出側の冷媒過熱度を検出し、冷媒充填中に前記冷媒過熱度が所定値となるように前記冷凍サイクルを制御することが望ましい。 Furthermore, in those described above, the detected refrigerant superheat degree of the compressor discharge side, the refrigerant superheat in the refrigerant filling it is desirable to control the refrigeration cycle to a predetermined value.
さらに、上記のものにおいて、前記冷媒過冷却度に関連して前記冷凍サイクル内に充填されている冷媒量の適否を判定し、その結果を表示することが望ましい。 Furthermore, in those described above, in relation to the refrigerant supercooling degree judged the appropriateness of the amount of refrigerant charged into the refrigeration cycle, it is desirable to display the results.
さらに、上記のものにおいて、前記冷媒過冷却度に関連して前記冷凍サイクル内に充填されている冷媒量の適否を判定し、その結果を前記室内ユニットの起動や停止などの運転制御を行う制御装置に表示することが望ましい。 Furthermore, in those described above, in relation to the refrigerant supercooling degree judged the appropriateness of the amount of refrigerant charged into the refrigeration cycle, controls the operation such as starting and stopping of the indoor unit and the results control it is desirable to display device.

さらに、本発明は、圧縮機、室外熱交換器、減圧装置、受液器を有する室外ユニットと、室内熱交換器、減圧装置を有する室内ユニットと、を配管接続した冷凍サイクルに対して冷媒を充填する冷媒充填方法であって、前記室外ユニットの受液器と室内ユニットの間に副流部を備えた過冷却熱交換器の主流部を配置し、前記副流部の一方は冷媒充填電磁弁を介して冷媒ボンベに、他方は前記圧縮機の吸入側に接続し、前記主流部出口側の冷媒過冷却度に関連して前記冷媒充填電磁弁の開閉を制御しながら冷媒を充填するものである。 Furthermore, the present invention includes a compressor, an outdoor heat exchanger, and an outdoor unit having a decompression device, a liquid receiver, an indoor heat exchanger, and an indoor unit having a decompression device, a refrigerant with respect to the pipe connection refrigerating cycle a refrigerant charging method of filling, wherein the main portion of the supercooling heat exchanger provided with a side stream portion between the liquid receiver and an indoor unit of an outdoor unit disposed, the one refrigerant filling solenoid of auxiliary flow section a refrigerant cylinder via a valve, which other is connected to the suction side of the compressor, in relation to the refrigerant supercooling degree of the main portion outlet to fill the refrigerant while controlling the opening and closing of the refrigerant filling solenoid valve it is.

本発明によれば、室外ユニットに付設する受液器と室内ユニットの間に冷媒を冷却する主流部と主流部を冷却するためのバイパス部を備えた過冷却熱交換器を設け、過冷却熱交換器出口の冷媒過冷却度を検出し、冷媒充填電磁弁を開閉しながら冷媒充填作業を行うので、冷媒ボンベの内圧と圧縮機吸入側の圧力差を確保することができ、素早く冷媒を充填することができる。 According to the present invention, it provided the supercooling heat exchanger having a bypass section for cooling the main flow portion and a main portion for cooling the refrigerant between the liquid receiver and the indoor units attached to the outdoor unit, subcooling heat detecting a refrigerant supercooling degree of the exchanger outlet, filling since the refrigerant filling operation while opening and closing the refrigerant charge solenoid valve, it is possible to ensure a pressure difference between internal pressure and the suction side of the compressor of the refrigerant cylinder, the quick refrigerant can do. また、冷媒ボンベから流出する液冷媒を過冷却熱交換器により加熱ガス化して充填するので、圧縮機への液戻りを抑制することができ、冷媒充填中の圧縮機の信頼性を確保することができる。 Furthermore, since filling liquid refrigerant flowing from the refrigerant cylinder to heat the gas by the supercooling heat exchanger, it is possible to suppress the liquid return to the compressor, to ensure the reliability of the compressor in the refrigerant filling can.

以下、本発明の一実施の形態を図1ないし図10を参照して説明する。 Hereinafter, an embodiment of the present invention with reference to FIGS. 1 to 10.
図1は、本発明の一実施形態を示す冷媒充填装置を具備した空気調和装置の冷凍サイクル系統図であり、室外機と室内機をガス側接続配管と液側接続配管で接続されている。 Figure 1 is a refrigeration cycle system diagram of an air conditioning apparatus provided with the refrigerant charging device according to an embodiment of the present invention, and the outdoor unit and the indoor units are connected in a gas-side connecting pipe and the liquid-side connecting pipe. 室外機は、圧縮機1、四方弁2、室外熱交換器7、室外膨張弁6、受液器5、アキュムレータ8、ガス側接続配管と接続されるガス阻止弁10、液側接続配管と接続される液阻止弁11を配管接続している。 The outdoor unit includes a compressor 1, a four-way valve 2, an outdoor heat exchanger 7, the outdoor expansion valve 6, the receiver 5, an accumulator 8, the gas blocking valve 10 is connected to the gas side connecting pipe, connected to a liquid-side connecting pipe the liquid blocking valve 11 which is being connected by piping.
圧縮機1の吐出側配管には、圧縮機から吐出される冷媒ガスの圧力を検出する吐出圧力センサ15と吐出される冷媒ガスの温度を検出する吐出温度サーミスタ16が設けられ、吐出圧力センサ15と吐出温度サーミスタ16の出力信号は、吐出ガス過熱度演算手段32に入力され、吐出圧力センサ15の信号を元に飽和温度を演算し、吐出温度サーミスタ16と演算された飽和温度との差を演算することで吐出ガス過熱度を演算する。 A discharge side pipe of the compressor 1, discharge temperature thermistor 16 for detecting the temperature of the refrigerant gas discharged to the discharge pressure sensor 15 for detecting the pressure of the refrigerant gas discharged from the compressor is provided, the discharge pressure sensor 15 an output signal of the discharge temperature thermistor 16 is input to superheat degree of discharge gas computing means 32, the saturation temperature is calculated based on the signal of the discharge pressure sensor 15, the difference between the discharge temperature thermistor 16 and the calculated saturation temperature computing a superheat degree of discharge gas by calculating.
また、受液器5と液阻止弁11の間には、受液器5から流出する液冷媒を過冷却する過冷却熱交換器9が設けられている。 Between the receiver 5 and the liquid blocking valve 11, the supercooling heat exchanger 9 is provided for supercooling the liquid refrigerant flowing out from the receiver 5. 過冷却熱交換器9は、主流部とバイパス部が設けられ、この主流部とバイパス部で熱交換する構成となっている。 Supercooling heat exchanger 9, the main portion and the bypass portion is provided and is configured to heat exchange the main unit and the bypass unit. この過冷却熱交換器9の主流部は受液器5の一方と液阻止弁11とに配管接続され、バイパス部の一方はアキュムレータ8の入口部にバイパスするように配管接続され、もう一方は、冷媒充填電磁弁14を介して冷媒ボンベ50と接続されている。 The main portion of the supercooling heat exchanger 9 is connected by piping to the one and the liquid blocking valve 11 of the receiver tank 5, one of the bypass section is connected by piping to bypass the inlet portion of the accumulator 8 and the other It is connected to the refrigerant cylinder 50 via the refrigerant charge solenoid valve 14. 過冷却熱交換器9と液阻止弁11の間には、過冷却熱交換器9で冷却された液冷媒の温度を検出するための過冷却熱交換器出口温度サーミスタ17が設けられ、吐出圧力センサ15と過冷却熱交換器出口温度サーミスタ17の出力信号は、過冷却度演算手段30に入力され、吐出圧力センサ15の信号を元に飽和温度を演算し、演算した飽和温度と過冷却熱交換器出口温度サーミスタ17の値の差を演算することで過冷却熱交換器出口の過冷却度を演算する。 Between the supercooling heat exchanger 9 and the liquid blocking valve 11, the subcooling heat exchanger outlet temperature thermistor 17 for detecting the temperature of the cooled liquid refrigerant in the subcooling heat exchanger 9 is provided, the discharge pressure a sensor 15 the output signal of the supercooling heat exchanger outlet temperature thermistor 17 is input to the supercooling degree calculating means 30 calculates the saturation temperature based on the signal of the discharge pressure sensor 15, the calculated saturation temperature and the subcooling heat by calculating the difference between the value of the exchanger outlet temperature thermistor 17 for calculating the degree of subcooling of the subcooling heat exchanger outlet.
室内機は、室内熱交換器3と室内膨張弁4を配管接続し、室外機と室内機を接続するガス側配管及び液側配管には、それぞれガス側サービスポート12と液側サービスポート13が設けられている。 Indoor unit, the indoor heat exchanger 3 and the indoor expansion valve 4 connected by piping to the gas-side pipe and the liquid-side pipe connecting the outdoor unit and indoor unit, each gas side service port 12 and the liquid side service port 13 It is provided.
さらに、吐出ガス過熱度演算手段32の出力信号は室内膨張弁4の駆動回路に接続され、過冷却演算手段30の出力信号は冷媒充填電磁弁開閉手段31に入力され、冷媒充填電磁弁開閉手段31の出力信号は冷媒充填電磁弁14の駆動回路に接続される。 Further, the output signal of the superheat degree of discharge gas computing means 32 is connected to a drive circuit of the indoor expansion valve 4, the output signal of the supercooling operation means 30 is input to the refrigerant charge solenoid valve opening and closing means 31, the refrigerant filling solenoid valve opening and closing means the output signal 31 is connected to a drive circuit of the refrigerant charge solenoid valve 14.

次に、空気調和装置の冷媒充填方法について図1ないし図2により説明する。 Next, it will be described with reference to FIGS. 1 to 2 for the refrigerant filling method of the air conditioner. 図2は、本発明の冷媒充填装置による冷媒充填方法を示した冷媒充填フローチャートを示している。 Figure 2 illustrates a refrigerant filling flowchart showing a refrigerant filling method according to the refrigerant filling apparatus of the present invention. 室外機には予め室外機で必要な最低の冷媒量が封入されており、現地に室外機と室内機が施工された後にガス側接続配管、液側接続配管及び室内機内の空気や水分等を除去するために、ガス側サービスポート12及び液側サービスポート13に真空ポンプ等を接続し、配管内部及び機内配管内部を真空にする。 Minimum quantity of refrigerant needed in advance outdoor unit to the outdoor unit is sealed, the gas-side connection pipe after the outdoor unit and the indoor unit is construction in the field, a liquid-side connecting pipe and indoor unit of the air, moisture, or the like to remove, connect the vacuum pump to the gas side service port 12 and the liquid side service port 13, the internal pipe interior and flight piping to a vacuum. 次に、ガス阻止弁10と液阻止弁11を開けて、室外機内に封入されている冷媒を室内機側に開放し、空気調和装置を冷房運転で起動して図1に示す冷凍サイクル系統図に示す如く実線矢印のように冷媒を流す。 Next, by opening the gas blocking valve 10 and the liquid blocking valve 11, opens the refrigerant sealed in the outdoor unit to the indoor unit side, the refrigeration cycle system diagram shown in Figure 1 by starting an air conditioner in cooling operation the refrigerant flows as indicated by a solid line arrow as shown in.
圧縮機1吐出側のガス冷媒温度や圧力等の変化が小さくなる状態すなわち冷凍サイクルが安定するまで室内膨張弁4により吐出ガス過熱度をある一定の値TdSH0以上となるように制御し、冷凍サイクルが安定と判定された後に冷媒充填電磁弁14を開く。 State, that the refrigeration cycle changes in the gas refrigerant temperature and pressure and the like of the compressor 1 discharge side is reduced is controlled so that the indoor expansion valve 4 by superheat degree of discharge gas constant value TdSH0 over a certain to stabilize the refrigeration cycle opening the refrigerant charge solenoid valve 14 after it is determined as stable. 冷媒ボンベ50から流出する液冷媒は、破線矢印の如く冷媒充填電磁弁14を通り過冷却熱交換器9のバイパス部に流入し、受液器5から流出する高温高圧の冷媒に放熱しながら蒸発ガス化してアキュムレータ8入口部に流入される。 The liquid refrigerant flowing from the refrigerant cylinder 50 flows into the bypass section of the street supercooling heat exchanger 9 the refrigerant charge solenoid valve 14 as indicated by broken line arrows, while dissipating heat to the high-temperature high-pressure refrigerant flowing out from the receiver tank 5 evaporates gasified flows into the accumulator 8 inlet.

吐出ガス過熱度がある一定の値TdSH0以上であれば、吐出圧力センサ15から演算される飽和温度と過冷却熱交換器9出口側に付設する過冷却熱交換器出口温度サーミスタ17との差である過冷却熱交換器出口過冷却度SCを演算し、過冷却熱交換器出口過冷却度SCの値が予め設定されている適正冷媒充填時の過冷却度α以上となるまで冷媒ボンベ50から冷媒を充填し続け、過冷却熱交換器出口過冷却度SCの値が適正冷媒充填時の過冷却度α以上となった時点で冷媒充填電磁弁14を閉めることで冷媒充填が完了する。 If a constant value TdSH0 more than superheat degree of discharge gas is, the difference between the supercooling heat exchanger outlet temperature thermistor 17 attached to the saturated temperature computed from the discharge pressure sensor 15 and the subcooling heat exchanger 9 outlet from one calculates the subcooling heat exchanger outlet supercooling degree SC, the subcooling heat exchanger outlet supercooling degree refrigerant cylinder 50 until the value of SC is proper during refrigerant charging supercooling degree α or which has been set in advance continues to fill the refrigerant, the refrigerant filled by closing the refrigerant charge solenoid valve 14 when the value of the subcooling heat exchanger outlet supercooling degree SC becomes supercooling degree α or more during the proper refrigerant charging is completed.

図3は、本発明の冷媒充填装置を具備した空気調和装置の冷媒充填時における冷凍サイクルのモリエル線図を示し、実線及び丸印は冷媒適正充填時の冷凍サイクル60を示しており、破線及び四角印は冷媒不足充填時の冷凍サイクル61を示している。 Figure 3 shows a Mollier diagram of a refrigeration cycle during refrigerant filling of the air conditioner provided with the refrigerant charging device of the present invention, the solid line and circle shows the refrigeration cycle 60 when refrigerant proper filling, broken lines and squares shows the refrigeration cycle 61 at the time of refrigerant shortage filling.
空気調和装置内に冷媒を適正に充填される前の場合は、図3に示すモリエル線図の破線で示す冷凍サイクルとなり、圧縮機1で圧縮された高温高圧のガス冷媒はb'となり圧縮機1から吐出され、室外熱交換器7内に流入し空気と熱交換して放熱することでc'となり受液器5に流入する。 If before being properly filled refrigerant in an air conditioning apparatus becomes a refrigeration cycle shown by the dashed Mollier diagram shown in FIG. 3, the gas refrigerant compressed by the compressor 1 high-temperature and high-pressure b 'becomes compressor discharged from the 1, flows into the outdoor heat exchanger 7 flows into the c 'next receiver tank 5 by heat radiation and air and heat exchange. ここで、空気調和装置内の冷媒が不足しているため、受液器5内には液冷媒が溜まらず受液器5からは気液二相状態で流出し、過冷却熱交換器9で冷媒ボンベ50から流入する冷媒に冷却されd'の状態となり室内膨張弁4で減圧されe'となり室内熱交換器3で空気と熱交換して蒸発しa'の状態で圧縮機1に吸い込まれる。 Here, since the refrigerant in the air conditioning apparatus is insufficient, the receiver 5 flows out in the gas-liquid two-phase state from the receiver 5 without accumulate the liquid refrigerant in the subcooling heat exchanger 9 sucked into the compressor 1 in a state in 'it is decompressed by the indoor expansion valve 4 in a state of e' is cooled in a refrigerant flowing from the refrigerant cylinder 50 d next indoor heat exchanger 3 and evaporated exchanging heat with air a ' .
空気調和装置内に冷媒が適正に充填された後の場合は、図3に示すモリエル線図の実線で示す冷凍サイクルとなり、圧縮機1で圧縮された高温高圧のガス冷媒はbとなり圧縮機1から吐出され、室外熱交換器7内に流入し空気と熱交換して放熱することでcとなり受液器5に流入する。 If after the refrigerant has been properly charged in the air conditioner becomes a refrigeration cycle shown by the solid line in the Mollier diagram shown in FIG. 3, the gas refrigerant compressed by the compressor 1 high-temperature and high-pressure b becomes compressor 1 discharged from, flows into the outdoor heat exchanger 7 flows into the c next receiver 5 by heat radiation and air and heat exchange. ここで、空気調和装置内の冷媒が適正な量だけ充填されているため、受液器5内に液冷媒が溜まり受液器5からは液単相状態で流出し、過冷却熱交換器9で冷媒ボンベ50から流入する冷媒に冷却され過冷却状態のdとなり室内膨張弁4で減圧されeとなり室内熱交換器3で空気と熱交換して蒸発しaの状態で圧縮機1に吸い込まれる。 Here, since the refrigerant in the air conditioner is filled by an amount appropriate, from the receiver 5 accumulates the liquid refrigerant in the receiver 5 flows out in a liquid single-phase state, the supercooling heat exchanger 9 sucked into the compressor 1 in a state of being cooled to the refrigerant flowing from the refrigerant cylinder 50 evaporates by exchanging heat with air pressure is reduced e next indoor heat exchanger 3 at d next indoor expansion valve 4 in the supercooled state a .

図4は、冷媒充填割合と過冷却熱交換器9出口の冷媒過冷却度の相関関係を表した特性図であり、冷媒充填割合が100%よりも少ない冷媒不足の状態は、図3に示す冷凍サイクルのモリエル線図では破線の状態となり、過冷却熱交換器9出口の冷媒状態は点d'の気液二相状態となるため冷媒過冷却度は0Kとなる。 Figure 4 is a characteristic diagram showing the correlation between the refrigerant charge proportions and the supercooling heat exchanger 9 refrigerant subcooling degree at the outlet, the state of the refrigerant shortage less than refrigerant charging rate of 100%, the 3 It becomes broken line state in the Mollier diagram of a refrigeration cycle, the refrigerant subcooling for the refrigerant state in which the gas-liquid two-phase state at the point d 'in the supercooling heat exchanger 9 outlet becomes 0K. 冷媒を追加充填して行き冷媒充填割合が100%に近づいてくると、凝縮器として作用している室外熱交換器7に存在する冷媒量が増加するため、室外熱交換器7出口の冷媒状態がc'からcの方に移動し、過冷却熱交換器9出口の冷媒状態が過冷却状態となるため、実線のように右上がりに過冷却度が増加する。 The refrigerant filling fraction continue to refill the refrigerant approaching 100%, since the amount of refrigerant existing in the outdoor heat exchanger 7 acting as a condenser is increased, the state of refrigerant in the outdoor heat exchanger 7 outlet There moves toward the c 'of c, the refrigerant state of the supercooling heat exchanger 9 outlet is supercooled state, the subcooling degree increases upward to the right as shown by the solid line. さらに冷媒を追加充填すると、追加された冷媒は受液器5内に溜まるだけで、室外熱交換器7に存在する冷媒量が変化しないため、過冷却度の増加は発生しない。 Still additional charging refrigerant, additional refrigerant only collects in the receiver 5, since the amount of refrigerant existing in the outdoor heat exchanger 7 does not change, the increase in the degree of supercooling do not occur. さらに冷媒を追加充填すると、受液器5から冷媒が溢れ出すため室外熱交換器7に存在する冷媒量が増加し、室外熱交換器7出口の冷媒状態が過冷却状態となるため、過冷却熱交換器9出口の冷媒過冷却度は増加する。 Still additional charging refrigerant, increases the amount of refrigerant existing in the outdoor heat exchanger 7 for overflowing the refrigerant from the receiver tank 5, the refrigerant state of the outdoor heat exchanger 7 outlet is supercooled state, supercooling heat exchanger 9 refrigerant subcooling degree at the outlet increases.

以上説明したように、本冷媒充填装置では、冷媒を追加充填する際に空気調和装置を冷房運転で運転して冷媒ボンベ50の内圧とアキュムレータ8入口部の圧力差を確保しながら冷媒充填作業を行うため、素早く冷媒を充填することが可能となる。 As described above, in the present refrigerant charging system, refrigerant filling operation while driving a air conditioner in cooling operation to ensure the pressure difference between the internal pressure and the accumulator 8 inlet of the refrigerant cylinder 50 during the refill refrigerant to do, it is possible to fill quickly refrigerant. また、冷媒ボンベ50から流出する液冷媒を過冷却熱交換器9により加熱ガス化して充填するため、圧縮機1への液戻りを抑制することができ、冷媒充填中の圧縮機1の信頼性を確保することができる。 Further, in order to fill the liquid refrigerant flowing from the refrigerant cylinder 50 by heating the gas by the supercooling heat exchanger 9, it is possible to suppress the liquid return to the compressor 1, the reliability of the compressor 1 in the refrigerant filling it can be ensured. さらに、過冷却熱交換器9出口の冷媒過冷却度を検出し、冷媒充填電磁弁14を開閉しながら冷媒充填作業を行うため、冷媒充填作業を自動化することができ、空気調和装置の施工時間の短縮を図ることが可能である。 Furthermore, to detect the refrigerant supercooling degree of the supercooling heat exchanger 9 outlet, for carrying out the refrigerant charging work while opening and closing the refrigerant charge solenoid valve 14, it is possible to automate the refrigerant charging work, construction time of the air conditioner it is possible to shorten the.

次に、本発明の他の実施形態について図5ないし図6を参照して説明する。 It will now be described with reference to FIGS. 5-6 for the other embodiments of this invention.
図5において、受液器5と過冷却熱交換器9の主流部の間にバイパス回路を設け、バイパス回路を過冷却熱交換器9のバイパス部と冷媒充填電磁弁14の間に接続し、バイパス回路の途中に過冷却バイパス膨張弁21を設けている。 5, a bypass circuit is provided between the receiver 5 mainstream portion of the supercooling heat exchanger 9, a bypass circuit between the bypass section and the refrigerant charge solenoid valve 14 of the supercooling heat exchanger 9, It is provided with a subcooling bypass expansion valve 21 in the middle of the bypass circuit.
冷媒充填方法は、冷房運転を行う際に、バイパス回路に付設する過冷却バイパス膨張弁21を所定の開度で固定し、冷媒充填中は過冷却熱交換器9のバイパス部に常時冷媒を流して行われる。 Refrigerant charging method, when performing the cooling operation, the subcooling bypass expansion valve 21 attached to the bypass circuit is fixed at a predetermined opening, the refrigerant filling flowing constantly refrigerant to the bypass portion of the supercooling heat exchanger 9 It is performed Te.

図6は、冷媒充填割合と過冷却熱交換器9出口の冷媒過冷却度の相関関係を表した特性図であり、図において、実線は図4で説明した過冷却バイパス膨張弁が無いもしくは閉じている場合の特性72を示し、破線は過冷却バイパス膨張弁が所定の開度で開いている場合の特性71を示す。 Figure 6 is a characteristic diagram showing the correlation between the refrigerant charge proportions and the supercooling heat exchanger 9 refrigerant subcooling degree at the outlet, in the figure, a solid line or closed there is no subcooling bypass expansion valve described in FIG. 4 It shows the characteristic 72 of the case in which, a broken line indicates the characteristic 71 in the case where the subcooling bypass expansion valve is opened at a predetermined opening. 過冷却バイパス膨張弁21が所定の開度で開いている場合は、過冷却熱交換器9のバイパス部への流量は、冷媒ボンベ50から流入する量と過冷却バイパス膨張弁21を通るバイパス量の合計量となるため、過冷却熱交換器9での冷却能力が増大する。 If subcooling bypass expansion valve 21 is opened at a predetermined opening degree, the flow to the bypass portion of the supercooling heat exchanger 9, the bypass amount through the quantity and subcooling bypass expansion valve 21 flowing from the refrigerant cylinder 50 since the total amount of the cooling capacity of the supercooling heat exchanger 9 is increased. このため、過冷却バイパス膨張弁21が無いもしくは閉じている場合と比較して、冷媒不足の状態からでも過冷却熱交換器9出口の冷媒が過冷却状態となり、過冷却度が発生し、冷媒充填適正時の場合は過冷却度が大きくなる。 Therefore, as compared with the case where the subcooling bypass expansion valve 21 is not or closed, refrigerant in the supercooling heat exchanger 9 exit from any state of the refrigerant shortage becomes supercooled state, the degree of supercooling has occurred, coolant If at the time of filling the proper supercooling degree is increased.

以上説明したように、受液器5と過冷却熱交換器9の主流部の間に過冷却バイパス膨張弁21が付設するバイパス回路を設け、冷媒充填時にこのバイパス回路に冷媒を流すようにしたことで、過冷却熱交換器9出口の冷媒過冷却度の変化を大きくすることができ、冷媒の過不足をより精度良く判定することができる。 As described above, the bypass circuit subcooling bypass expansion valve 21 between the main portion of the receiver tank 5 and the supercooling heat exchanger 9 is attached is provided, and as the refrigerant flows into the bypass circuit during the refrigerant charging it is, it is possible to increase the change of the refrigerant supercooling degree of the supercooling heat exchanger 9 the outlet, it is possible to more accurately determine the excess and deficiency of refrigerant. また、冷媒不足の状態から冷媒過冷却度が発生するため、冷媒不足の割合をこの過冷却度から算出することが可能となる。 Further, since the refrigerant supercooling degree is generated from the state of the refrigerant shortage, it is possible to calculate the ratio of the refrigerant shortage from the degree of subcooling.

次に、本発明の他の実施形態について図7を参照して説明する。 Will now be described with reference to FIG. 7 another embodiment of the present invention.
図7は、冷媒充填装置を具備した空気調和装置の冷凍サイクル系統図であり、冷媒充填装置は、過冷却度演算手段30に入力していた吐出圧力センサの替わりとして、室外熱交換器7の出口側の温度を検出するための凝縮温度サーミスタ18を室外熱交換器7と受液器5の間に設け、凝縮温度サーミスタ18の出力信号を過冷却演算手段30に入力し、凝縮温度サーミスタ18の値と過冷却熱交換器出口温度サーミスタ17の値の差から、過冷却熱交換器9出口の冷媒過冷却度を演算するものである。 Figure 7 is a refrigeration cycle system diagram of an air conditioning apparatus provided with the refrigerant charging device, the refrigerant filling apparatus, as instead of the discharge pressure sensor which has been input to the supercooling degree calculating means 30, the outdoor heat exchanger 7 the condensation temperature thermistor 18 for detecting the temperature of the outlet side is provided between the outdoor heat exchanger 7 and the receiver 5, the output signal of the condensation temperature thermistor 18 to the supercooling operation means 30, the condensation temperature thermistor 18 value and the difference between the value of the supercooling heat exchanger outlet temperature thermistor 17, and thereby calculates the refrigerant supercooling degree of the supercooling heat exchanger 9 outlet. また、吐出ガス過熱度演算手段32の替わりとして、室内熱交換器3の入口部及び出口部にそれぞれ室内液温度サーミスタ20及び室内ガス温度サーミスタ19を設け、各々のサーミスタの出力信号を熱交過熱度演算手段33に入力し、室内ガス温度サーミスタ19の値と室内液温度サーミスタ20の値の差から、室内熱交換器3の冷媒過熱度を演算し、この冷媒過熱度により室内膨張弁4の開度を制御する。 The discharge as alternative to gas superheat degree calculating unit 32, the indoor heat exchanger 3 of the inlet and outlet chamber liquid respectively portion temperature thermistor 20 and the indoor gas temperature thermistor 19 is provided, each of the heat 交過 thermal output signal of the thermistor enter the time calculation means 33, from the difference between the values ​​of the indoor gas temperature thermistor 19 and the indoor liquid temperature thermistor 20, calculates the refrigerant superheating degree of the indoor heat exchanger 3, the indoor expansion valve 4 by the refrigerant superheat for controlling the opening.
したがって、過冷却度演算手段や過熱度演算手段の入力信号として高価な圧力センサを使用せずに、安価な温度サーミスタを使用しているため、冷媒充填装置としてのコストを低減することができる。 Therefore, without using an expensive pressure sensor as the input signal of the supercooling degree calculating means and the superheating degree operating means, due to the use of inexpensive temperature thermistor, it is possible to reduce the cost of the refrigerant charging device.

次に、本発明のさらに他の実施形態について図8ないし図9を参照して説明する。 Next, further with reference to FIG. 8 to 9 will be described another embodiment of the present invention.
図8は、冷媒充填装置を具備した空気調和装置の冷凍サイクル系統図であり、冷媒充填装置は、冷媒充填電磁弁14の入口側と冷媒ボンベ50とを接続する配管部に冷媒充填阻止弁22を設け、冷媒充填阻止弁22と冷媒充填電磁弁14の間から過冷却熱交換器9と液阻止弁11の間にバイパスするように配管接続し、このバイパス回路にプリチャージ逆止弁23を設けている。 Figure 8 is a refrigeration cycle system diagram of an air conditioning apparatus provided with the refrigerant charging device, the refrigerant filling apparatus, refrigerant charge blocking valve to the pipe section connecting the inlet side and the refrigerant cylinder 50 of the refrigerant charge solenoid valve 14 22 the provided, connected by piping to bypass between the supercooling heat exchanger 9 and the liquid blocking valve 11 from between the refrigerant charge blocking valve 22 and the refrigerant charge solenoid valve 14, the pre-charge check valve 23 in the bypass circuit It is provided.
図9は、冷媒充填装置による冷媒充填フローチャートを示し、室外機には予め室外機で必要な最低の冷媒量が封入されており、現地に室外機と室内機が施工された後にガス側接続配管、液側接続配管及び室内機内の空気や水分等を除去するために、ガス側サービスポート12及び液側サービスポート13に真空ポンプ等を接続し、配管内部及び機内配管内部を真空にする。 Figure 9 shows a refrigerant filling flowchart by refrigerant charging device, a minimum quantity of refrigerant needed in advance outdoor unit to the outdoor unit is sealed, the gas-side connection pipe after the outdoor unit and the indoor unit is construction in the site , in order to remove the liquid-side connecting pipe and indoor unit of the air, moisture, or the like, to connect the vacuum pump to the gas side service port 12 and the liquid side service port 13, the internal pipe interior and flight piping to a vacuum. そして、ガス阻止弁10と液阻止弁11を開けて、室外機内に封入されている冷媒を室内機側に開放した後に、冷媒充填阻止弁22を開く。 Then, by opening the gas blocking valve 10 and the liquid blocking valve 11, after opening the refrigerant sealed in the outdoor unit to the indoor unit side, opening the refrigerant charge blocking valve 22. ガス阻止弁10及び液阻止弁11を開くと冷凍サイクル内の内圧が低下し、冷媒ボンベ50の内圧とに差圧が生じ、この圧力差を利用してプリチャージ逆止弁23を通り液接続配管側に冷媒が充填される。 Internal pressure in the refrigeration cycle open the gas blocking valve 10 and the liquid blocking valve 11 is lowered, the pressure difference occurs and the internal pressure of the refrigerant cylinder 50 through fluid connection precharge check valve 23 by utilizing the pressure difference refrigerant is filled in the pipe side. ここで、冷凍サイクル内の圧力変動が所定の値SPより小さくなる場合は、これ以上冷媒ボンベ50から冷凍サイクル内に冷媒が充填できないため、冷房運転で冷凍サイクルを起動して図8に示す冷凍サイクル系統図の実線矢印のように冷媒を流す。 Here, if the pressure fluctuations in the refrigerant cycle becomes smaller than a predetermined value SP indicates a more refrigerant cylinder 50 can not fill the refrigerant inside the refrigeration cycle, in FIG. 8 to start the refrigeration cycle in the cooling operation frozen the refrigerant flows as shown by the solid line arrows in cycle system diagram. その後は、図2に示す冷媒充填方法と同じである。 Thereafter, the same as the refrigerant charging method shown in FIG.
本例によれば、冷房運転前に冷凍サイクル内の内圧と冷媒ボンベ50の内圧の圧力差を利用して冷媒を充填するため、接続配管長さが非常に長く予め室外機に充填されている冷媒量では冷房運転ができないような場合でも冷媒を自動で充填することができ、空気調和装置の施工時間の短縮を図ることが可能である。 According to this embodiment, in order to fill the refrigerant by utilizing the pressure difference between the internal pressure of the inner pressure and the refrigerant cylinder 50 of the refrigeration cycle before the cooling operation, the connection pipe length is filled in very long pre-outdoor unit in the amount of the refrigerant can be filled automatically refrigerant even if that can not be cooling operation, it is possible to shorten the construction time of the air conditioner.

以上、室外機1台に対して室内機が1台設置される空気調和装置について説明したが、室外機が1台に対して室内機が2台以上の複数台が設置される多室形空気調和装置であっても、同等の効果を有する。 Having described air conditioner indoor unit is installed one for a single outdoor unit, a multi-room air outdoor unit multiple is installed indoor units is two or more for a single even conditioner, having the same effect.
また、過冷却熱交換器出口の冷媒過冷却度から冷凍サイクル内の冷媒量が適正か否かを判定する方法として、冷媒充填作業の場合について説明したが、冷媒充填作業が終了した通常の冷房運転時の場合においては、冷媒過冷却度を利用して冷凍サイクル内の冷媒量が適正か否かを判定する冷媒量判定を行う。 Further, a method for determining whether the proper refrigerant quantity in the refrigerant cycle from the refrigerant supercooling degree of the supercooling heat exchanger outlet, the description has been given of the refrigerant filling operation, normal cooling the refrigerant filling operation has been completed in case during operation performs a refrigerant quantity judging determines the amount of refrigerant or proper or not in the refrigeration cycle by utilizing the refrigerant supercooling degree.
さらに、冷媒ボンベの代わりに冷媒量調整用の貯留タンクを室外機内に設置し、貯留タンクには入口部と出口部が存在し、貯留タンクの入口部と冷凍サイクルの高圧部とを電磁弁を介して接続し、貯留タンクの出口部と冷媒充填電磁弁とを接続することで、冷凍サイクル内の冷媒量を自由に自動で変えることができる。 Further, the storage tank for adjusting refrigerant amount placed in outdoor unit in place of the refrigerant cylinder, the storage tank there is an inlet portion and an outlet portion, a solenoid valve and a high pressure portion of the inlet portion and the refrigeration cycle of the storage tank via connected, by connecting the outlet portion and the refrigerant filling solenoid valve of the storage tank can be varied automatically freely refrigerant quantity in the refrigerant cycle.
さらに、冷媒充填装置で充填する冷媒の種類が非共沸混合冷媒の場合は、冷媒ボンベから液冷媒で充填するため、冷媒充填時に組成変化を抑制しながら素早く充填することが可能である。 Furthermore, the type of refrigerant to be filled in the refrigerant charging device for non-azeotropic refrigerant mixture, to fill the refrigerant cylinder in the liquid refrigerant, it is possible to quickly fill while suppressing the change in composition during refrigerant charging.
さらに、過冷却熱交換器出口温度サーミスタ部の温度を冷却する手段と、冷媒ボンベから充填される液冷媒を加熱する手段を過冷却熱交換器1つで行っているが、過冷却熱交換器出口温度サーミスタ部の温度を冷却する手段(例えば、受液器後流側に過冷却用熱交換器を設ける。)と冷媒ボンベから充填される液冷媒を加熱する手段(例えば、冷媒ボンベから充填される液冷媒を減圧して室外空気と熱交換する加熱用空気熱交換器を設け、加熱用空気熱交換器内を通す。)を別々に設けた場合も同様である。 Further, it means for cooling the temperature of the subcooling heat exchanger outlet temperature thermistor portion, although the means for heating the liquid refrigerant is filled from the refrigerant cylinder is performed in one subcooling heat exchanger, subcooling heat exchanger means for cooling the temperature of the outlet temperature thermistor portion (e.g., a receiver the downstream side provided supercooling heat exchanger.) and means for heating the liquid refrigerant is filled from the refrigerant cylinder (e.g., filled from the refrigerant cylinder is depressurized liquid refrigerant heating air heat exchanger to the outdoor air heat exchanger provided is passed through the inside of the heating air heat exchanger.) the same is true if the provided separately.

次に、本発明のさらに他の実施形態について図10を参照して説明する。 Will now be described with reference to FIG. 10 for the other embodiments of the present invention.
図10は、冷媒充填中や充填終了等の冷媒充填時の作業内容情報や冷媒充填量の適否判定結果の情報を表示する表示手段を設けた冷媒充填装置を具備した空気調和装置の冷凍サイクル系統図を示す。 Figure 10 is a refrigeration cycle system of an air conditioner provided with the refrigerant filling apparatus provided with a display means for displaying the propriety determination result information work information and refrigerant charge when refrigerant charging in the refrigerant charge and end-of-fill, etc. It shows a diagram. 冷媒充填装置は、過冷却度演算手段の出力信号を基に冷凍サイクル内に充填された冷媒量が適正か否かを判定する冷媒量適否判定手段を設け、冷媒量適否判定手段の出力信号はマイクロコンピュータに入力される。 Refrigerant charging device, the refrigerant quantity adequacy determining means determines whether or refrigerant amount proper filling an output signal to the refrigerating cycle based on the supercooling degree calculating means is provided, the output signal of the refrigerant quantity adequacy determining means It is input to the micro-computer. また、マイクロコンピュータには、冷媒自動充填運転、通常運転、試運転等の空気調和装置の運転情報が入力され、マイクロコンピュータ内の情報を表示するように表示手段が設けられた構成となっている。 Further, the microcomputer, the automatic refrigerant charging operation, normal operation, operation information of the air conditioner of the commissioning and the like are inputted, has a configuration in which the display means is arranged to display information in the microcomputer. 表示手段としては、室外ユニットの制御基板上に配設された7セグメント表示装置や液晶表示装置、各室内ユニットの起動や停止の制御を行うためのリモコンの表示部、各室内ユニットを一括で起動や停止の制御を行うための集中管理装置の表示部などがある。 The display unit, start 7 segment display devices and liquid crystal display device is disposed on a control board of the outdoor unit, the remote control of the display unit for performing control of starting and stopping the indoor units, each indoor unit in batch and there is a display unit of the central control device for controlling the stop.

次に、冷媒充填時の表示手段の表示内容について説明する。 Next, a description will be given of a display content of the display unit at the time of refrigerant filling. 冷媒充填のためにスイッチ等を入れた場合は、表示手段に冷媒充填運転中と認識できるように、7セグメント表示装置のように漢字表示ができない場合は英数字を組み合わせた表示(例えば、「RCH」)、液晶などの漢字表示が可能な場合は一般の人に認識できる表示(例えば、冷媒充填中)を表示する。 When switched like for refrigerant charging, so that it can be recognized that the refrigerant charging operation on the display means, 7 displayed when unable kanji appears as a segment display device that combines an alphanumeric (e.g., "RCH "), the display case capable of kanji display such as a liquid crystal that can be commonly recognized human (e.g., in the refrigerant charging) Show. また、冷媒充填が正常に終了した場合は、表示手段に冷媒充填運転が正常終了したことを認識できるように7セグメント表示装置のように漢字表示ができない場合は英数字を組み合わせた表示(例えば、「END」)、液晶などの漢字表示が可能な場合は一般の人に認識できる表示(例えば、冷媒充填完了)を表示する。 Further, if successful refrigerant filling, displayed when the refrigerant charging operation on the display unit can not kanji appears as 7-segment display device to recognize Successful completion of a combination of alphanumeric characters (e.g., "END"), if possible kanji display such as a liquid crystal displays display recognizable to the general public (e.g., refrigerant charge completion).
また、冷媒充填運転中に冷媒ボンベ内の冷媒が空になると、過冷却熱交換器を流通する冷媒循環量が減少するため過冷却熱交換器での冷却熱量が減少し、過冷却熱交換器出口の冷媒過冷却度が低下するため、冷媒ボンベ内が空であることを認識できる。 Further, the refrigerant in the refrigerant cylinder is emptied during the refrigerant charging operation, the cooling heat in the supercooling heat exchanger for circulation amount of refrigerant flowing through the subcooling heat exchanger is reduced is reduced, the supercooling heat exchanger the refrigerant subcooling degree at the outlet is reduced, it can recognize that the refrigerant cylinder is empty. このことから、冷媒充填中であるにも関わらず冷媒過冷却度が低下した場合には、表示手段に冷媒ボンベが空であるため冷媒ボンベを交換する指示もしくは冷媒ボンベが空であることを表示する。 Indicate that this reason, if the refrigerant supercooling degree despite being refrigerant charge is decreased, instructs or refrigerant cylinder to replace the refrigerant cylinder for the refrigerant cylinder to the display means is empty is empty to.

さらに、冷媒量適否判定手段の結果である「冷媒不足」や「冷媒適正」なども表示装置に合わせて表示する。 Furthermore, such a result of the refrigerant quantity adequacy determining means "refrigerant shortage" and "refrigerant properly" is also displayed in accordance with the display device. さらに、冷媒量適否判定手段から冷媒充填完了までに掛かる時間を演算し、演算した時間を表示手段に表示する。 Furthermore, it calculates the time required for the refrigerant quantity adequacy determining means to the refrigerant charging completion is displayed on the display means the calculated time.
以上によれば、表示手段に冷媒充填運転中や冷媒ボンベ内の状態や冷媒量適否判定手段の結果が表示されるため、現在の空気調和装置の運転が冷媒充填のために行われているのか、また冷媒充填量がどの程度なのかが一目でわかるようになる。 According to the above, since the result of the state and the refrigerant quantity adequacy determining means in the refrigerant charging operation and the refrigerant in the cylinder is displayed on the display unit, whether the operating current of the air conditioner is being performed for the refrigerant charging and whether a degree that refrigerant charge is at a glance. また、表示手段として室外ユニットの制御基板上に配設される7セグメント表示装置を用いた場合は、表示部分のコストが非常に安価でできる。 In the case of using the 7-segment display device which is disposed on the control board of the outdoor unit as a display unit, the cost of the display part can be very cheap. また、室外ユニットに液晶表示装置を設けた場合は、確実に認識できることになる。 Also, the case of providing a liquid crystal display device in the outdoor unit, so that can be reliably recognized.

また、表示手段として室内ユニットのリモコンの表示部や集中管理装置の表示部を用いた場合は、室外ユニットから離れた場合でも冷媒充填運転中や冷媒充填量などの認識が可能となる。 In the case of using the display portion of the remote controller of the display unit and the central control device of the indoor unit as a display unit, it is possible to recognize such refrigerant charging operation or refrigerant charge even when away from the outdoor unit. さらに、冷媒過冷却度検出手段から冷凍サイクル内に充填されている冷媒量の適否を判定する冷媒充填量適否判定手段を設け、冷媒充填中や充填終了等の冷媒充填時の作業内容情報や前記冷媒充填量適否判定手段で判定された情報を表示する表示手段を設けることで、空気調和装置の運転が冷媒充填のために行われているか、また空気調和機内に充填された冷媒量が適正であるかを誰もが簡単に確実に認識することができる。 Furthermore, the refrigerant charge appropriateness determination means for determining the appropriateness of the amount of coolant provided which is filled into the refrigeration cycle from the refrigerant supercooling degree detecting means, the operation content information and said at refrigerant charging in the refrigerant filling or end-of-fill, etc. by providing a display means for displaying the information determined by the refrigerant charge appropriateness determination means, whether operation of the air conditioner is being performed for the refrigerant charging, also appropriate that the amount of coolant filled in the machine air conditioning whether or not there anyone can easily and reliably recognize.

さらに、受液器と過冷却熱交換器とを接続する配管から過冷却熱交換器のバイパス部入口と冷媒充填電磁弁の間にバイパスするようにバイパス回路を設け、バイパス回路に過冷却バイパス膨張弁を設け、冷媒充填時にこのバイパス回路に冷媒を流すようにしたことで、冷媒の過不足を判定するための過冷却熱交換器出口の冷媒過冷却度変化を大きくすることができ、冷媒の過不足をより精度良く判定することができる。 Further, the bypass circuit to bypass between the receiver and the bypass section inlet and the refrigerant filling solenoid valve of the supercooling heat exchanger from the pipe which connects the supercooling heat exchanger is provided, subcooling bypass expansion in the bypass circuit a valve provided, it was allowed to flow to the refrigerant in the bypass circuit during refrigerant charging, it is possible to increase the refrigerant supercooling degree change in the subcooling heat exchanger outlet to determine the excess and deficiency of refrigerant, the refrigerant it is possible to more accurately determine the excess and deficiency. また、冷媒不足の状態から冷媒過冷却度が発生するため、冷媒不足の割合をこの過冷却度から算出することができる。 Further, since the refrigerant supercooling degree is generated from the state of the refrigerant shortage, it is possible to calculate the ratio of the refrigerant shortage from the degree of subcooling.

さらに、冷媒充填電磁弁の上流側に阻止弁を設け、冷媒充填電磁弁と阻止弁の間から過冷却熱交換器主流部出口側に冷媒が流れるように逆止弁を介してバイパス回路を設け、冷房運転前に冷凍サイクル内の内圧と冷媒ボンベの内圧の圧力差を利用して逆止弁部から液阻止弁側に冷媒を充填するため、接続配管長さが非常に長く、予め室外機に充填されている冷媒量では冷房運転ができないような場合でも冷媒を自動で充填することが可能であり、空気調和装置の施工時間の短縮を図ることができる。 Furthermore, a gate valve on the upstream side of the refrigerant charge solenoid valve is provided, the bypass circuit through a check valve so that the refrigerant flows provided from between the blocking valve refrigerant charge solenoid valve subcooling heat exchanger main unit outlet , to fill the refrigerant from the check valve portion by utilizing the pressure difference between the internal pressure of the inner pressure and the refrigerant cylinder in the refrigeration cycle before the cooling operation in the liquid gate valve side, it is very long connecting pipe length, advance the outdoor unit the amount of refrigerant charged into it is possible to fill automatically refrigerant even if that can not be cooling operation, it is possible to shorten the construction time of the air conditioner.

本発明の一実施形態を示す冷凍サイクル系統図。 Refrigeration cycle system diagram showing an embodiment of the present invention. 本発明の冷媒充填方法を示した冷媒充填フローチャート図。 Refrigerant charge flowchart showing a refrigerant filling method of the present invention. 本発明の一実施形態による冷媒充填時における冷凍サイクルのモリエル線図。 Mollier diagram of a refrigeration cycle during refrigerant charging according to an embodiment of the present invention. 本発明の一実施形態による冷媒充填割合と過冷却熱交換器出口の冷媒過冷却度の相関関係を表した特性図。 Characteristic diagram showing the correlation between the refrigerant supercooling degree of the refrigerant filling fraction and the subcooling heat exchanger outlet according to an embodiment of the present invention. 他の実施形態を示す冷凍サイクル系統図。 Refrigeration cycle system diagram showing another embodiment. 他の実施形態による冷媒充填割合と過冷却熱交換器出口の冷媒過冷却度の相関関係を表した特性図。 Characteristic diagram showing the correlation between the refrigerant supercooling degree of the refrigerant filling fraction and the subcooling heat exchanger outlet according to another embodiment. 他の実施形態を示す冷凍サイクル系統図。 Refrigeration cycle system diagram showing another embodiment. さらに他の実施形態を示す冷凍サイクル系統図。 Further refrigeration cycle system diagram showing another embodiment. さらに他の実施形態冷媒充填方法を示した冷媒充填フローチャート図。 Furthermore refrigerant charge flowchart showing another embodiment refrigerant charging method. さらに他の実施形態を示す冷凍サイクル系統図。 Further refrigeration cycle system diagram showing another embodiment.

符号の説明 DESCRIPTION OF SYMBOLS

1…圧縮機、3…室内熱交換器、4…室内膨張弁、5…受液器、6…室外膨張弁、7…室外熱交換器、8…アキュムレータ、9…過冷却熱交換器、10…ガス阻止弁、11…液阻止弁、12…ガス側サービスポート、13…液側サービスポート、14…冷媒充填電弁、15…吐出圧力センサ、16…吐出温度サーミスタ、17…過冷却熱交換器出口温度サーミスタ、18…凝縮温度サーミスタ、19…室内ガス温度サーミスタ、20…室内液温度サーミスタ、21…過冷却バイパス膨張弁、22…冷媒充填阻止弁、23…プリチャージ逆止弁、30…過冷却度演算手段、31…冷媒充填電磁弁開閉手段、32…吐出ガス過熱度演算手段、33…熱交過熱度演算手段、50…冷媒ボンベ、34…冷媒量適否判定手段、35…マイクロコンピュー 1 ... compressor, 3 ... indoor heat exchanger, 4 ... indoor expansion valve, 5 ... receiver, 6 ... outdoor expansion valve, 7 ... outdoor heat exchanger, 8 ... accumulator, 9 ... subcooling heat exchanger, 10 ... gas blocking valve, 11 ... liquid gate valve, 12 ... gas side service port, 13 ... liquid side service port, 14 ... refrigerant charging Denben, 15 ... discharge pressure sensor, 16 ... discharge temperature thermistor 17 ... supercooling heat exchanger vessel outlet temperature thermistor 18 ... condensing temperature thermistor 19 ... indoor gas temperature thermistor 20 ... indoor liquid temperature thermistor 21 ... subcooling bypass expansion valve 22 ... refrigerant charge blocking valve 23 ... precharge check valve, 30 ... supercooling degree calculating means, 31 ... refrigerant charge solenoid valve opening and closing means, 32 ... superheat degree of discharge gas computing means, 33 ... heat 交過 Netsudo calculating means, 50 ... refrigerant cylinder, 34 ... refrigerant quantity adequacy determining means, 35 ... Microcon Pew 、36…表示部。 , 36 ... display unit.

Claims (8)

  1. 圧縮機、室外熱交換器、減圧装置、受液器を有する室外ユニットと、室内熱交換器、減圧装置を有する室内ユニットと、を配管接続した冷凍サイクルに対して、所定量の冷媒を室外ユニット内に充填、又は冷媒を追加充填する冷媒充填装置において、 Compressor, an outdoor heat exchanger, pressure reducing device, and an outdoor unit having a receiver, an indoor heat exchanger, and an indoor unit having a decompression device for a pipe connection the refrigeration cycle, the outdoor unit a predetermined amount of the refrigerant in the refrigerant charging apparatus for adding fill filling, or the refrigerant within,
    前記室外ユニットの受液器と室内ユニットの間に副流部を備えた過冷却熱交換器の主流部を配置し、前記副流部の一方は冷媒充填電磁弁を介して冷媒ボンベに、他方は前記圧縮機の吸入側に接続し、前記主流部出口側の冷媒過冷却度に関連して前記冷媒充填電磁弁の開閉を制御することを特徴とする冷媒充填装置。 The mainstream of the supercooling heat exchanger provided with a side stream portion between the liquid receiver and the indoor unit of the outdoor unit are arranged, the on refrigerant cylinder one is through the refrigerant charge solenoid valve subflows portion, the other refrigerant charging apparatus characterized by is connected to the suction side of the compressor, in relation to the refrigerant supercooling degree of the main portion outlet for controlling the opening and closing of the refrigerant filling solenoid valve.
  2. 請求項1記載の冷媒充填装置において、前記受液器と前記過冷却熱交換器とを接続する配管から前記副流部の入口と前記冷媒充填電磁弁の間にバイパスするバイパス回路を設け、該バイパス回路に過冷却バイパス膨張弁を設けたことを特徴とする冷媒充填装置。 In the refrigerant filling apparatus of claim 1, a bypass circuit for bypassing the pipe that connects the supercooling heat exchanger and the receiver between the inlet and the refrigerant filling solenoid valve of the auxiliary flow section, the refrigerant charging apparatus characterized in that a subcooling bypass expansion valve to the bypass circuit.
  3. 請求項1に記載のものにおいて、前記冷媒充填電磁弁の上流側に阻止弁を設け、前記冷媒充填電磁弁と前記阻止弁の間から前記主流部の出口側に冷媒が流れる第2のバイパス回路を設けたことを特徴とする冷媒充填装置。 In those described in claim 1, wherein the blocking valve on the upstream side of the refrigerant charge solenoid valve provided, a second bypass circuit through which the refrigerant flows to the outlet side of the main portion from between said blocking valve and the refrigerant filling solenoid valve refrigerant charging device, wherein a is provided.
  4. 請求項1に記載のものにおいて、前記圧縮機の吐出側に設けられた吐出圧力センサと、前記主流部の出口側に設けられた温度サーミスタとを備え、前記吐出圧力センサによる圧力値から飽和液温度を演算し、前記温度サーミスタの出力値との差を求めることを特徴とする冷媒充填装置。 In those described in claim 1, comprising a discharge pressure sensor provided on the discharge side of the compressor, and a temperature thermistor provided on the outlet side of the main portion, saturated liquid from the pressure value by the discharge pressure sensor calculating the temperature, the refrigerant filling apparatus and obtains the difference between the output value of the temperature thermistor.
  5. 請求項1に記載のものにおいて、前記圧縮機吐出側の冷媒過熱度を検出し、冷媒充填中に前記冷媒過熱度が所定値となるように前記冷凍サイクルを制御することを特徴とする冷媒充填装置。 In those described in claim 1, wherein the detecting the refrigerant superheating degree of the compressor discharge side, the refrigerant filling the refrigerant superheat in the refrigerant filling and controlling the refrigeration cycle to a predetermined value apparatus.
  6. 請求項1に記載のものにおいて、前記冷媒過冷却度に関連して前記冷凍サイクル内に充填されている冷媒量の適否を判定し、その結果を表示することを特徴とする冷媒充填装置。 In those described in claim 1, in association with the refrigerant supercooling degree judged the appropriateness of the amount of refrigerant charged into the refrigeration cycle, a refrigerant filling apparatus and displaying the results.
  7. 請求項1に記載のものにおいて、前記冷媒過冷却度に関連して前記冷凍サイクル内に充填されている冷媒量の適否を判定し、その結果を前記室内ユニットの起動や停止などの運転制御を行う制御装置に表示することを特徴とする冷媒充填装置。 In those described in claim 1, in association with the refrigerant supercooling degree judged the appropriateness of the amount of refrigerant charged into the refrigeration cycle, the operation control such as starting and stopping of the indoor unit and the results refrigerant charging device and displaying a control device that performs.
  8. 圧縮機、室外熱交換器、減圧装置、受液器を有する室外ユニットと、室内熱交換器、減圧装置を有する室内ユニットと、を配管接続した冷凍サイクルに対して冷媒を充填する冷媒充填方法であって、前記室外ユニットの受液器と室内ユニットの間に副流部を備えた過冷却熱交換器の主流部を配置し、前記副流部の一方は冷媒充填電磁弁を介して冷媒ボンベに、他方は前記圧縮機の吸入側に接続し、前記主流部出口側の冷媒過冷却度に関連して前記冷媒充填電磁弁の開閉を制御しながら冷媒を充填することを特徴とする冷媒充填方法。 Compressor, an outdoor heat exchanger, and an outdoor unit having a decompression device, a liquid receiver, an indoor heat exchanger, and an indoor unit having a decompression device, in the refrigerant charging method of filling a refrigerant against pipe connection refrigerating cycle there are, the mainstream portion of the supercooling heat exchanger provided with a side stream portion between the liquid receiver and an indoor unit of an outdoor unit disposed, the one via the refrigerant charging solenoid valve refrigerant cylinder sub-streams portion , the other is connected to the suction side of the compressor, refrigerant charging, characterized in that in relation to the main portion outlet side of the refrigerant subcooling degree of filling the refrigerant while controlling the opening and closing of the refrigerant filling solenoid valve Method.
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