JPH0721374B2 - Air conditioner equipped with refrigerant amount detection device - Google Patents
Air conditioner equipped with refrigerant amount detection deviceInfo
- Publication number
- JPH0721374B2 JPH0721374B2 JP61000571A JP57186A JPH0721374B2 JP H0721374 B2 JPH0721374 B2 JP H0721374B2 JP 61000571 A JP61000571 A JP 61000571A JP 57186 A JP57186 A JP 57186A JP H0721374 B2 JPH0721374 B2 JP H0721374B2
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- JP
- Japan
- Prior art keywords
- refrigerant
- heat exchanger
- air conditioner
- amount
- temperature
- 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 - Lifetime
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- Air Conditioning Control Device (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、冷媒サイクルの機能により冷暖房を供する空
気調和機に係り、特に現場の状況に応じて接続用冷媒配
管の長さが選択される施工時に適量冷媒の充填が必要と
なる分離形空気調和機に関するものである。Description: TECHNICAL FIELD The present invention relates to an air conditioner that provides cooling and heating by the function of a refrigerant cycle, and particularly, the length of a refrigerant pipe for connection is selected according to the situation of the site. The present invention relates to a separation type air conditioner that needs to be filled with an appropriate amount of refrigerant during construction.
現場における施工時に限らず冷凍サイクルへの冷媒の封
入量が適正かどうかを判定する方法は、従来次の２つの
方法がある。Conventionally, there are the following two methods for determining whether or not the amount of refrigerant to be enclosed in the refrigeration cycle is appropriate, not only during construction on site.
１つは冷凍サイクルを構成する減圧装置の上流側配管に
サイドグラスを接続して設け、配管内を流れる冷媒中の
気泡の発生状況を目視することにより、冷媒量が不足し
ているかどうかを判断する方法で、例えば、アシュレー
ハンドブック、1979年リフリジェレントコントロールデ
バイスP20,22,Fig35（ASHRAE HANDBOOK 1979、REFRIGER
ANT CONTROL DEVICES）に記載されている。もう１つ
は、運転時の室内および室外の温度と運転圧力との関係
について、適正封入量の場合の基準線図を予め作成して
おき、空気調和機の試運転を行って前記基準線図と突き
合わせ許容内のずれかどうかを見て判定する方法で、例
えば、日立パッケージサービスマニアル、第87頁4.3
（３）1984年発行に記載されている。One is to connect a side glass to the upstream side pipe of the decompression device that constitutes the refrigeration cycle, and determine whether or not the amount of refrigerant is insufficient by visually observing the occurrence of bubbles in the refrigerant flowing inside the pipe. Method, for example, Ashley Handbook, 1979 Refrigerant Control Device P20,22, Fig35 (ASHRAE HANDBOOK 1979, REFRIGER
ANT CONTROL DEVICES). The other is that the relationship between the indoor and outdoor temperatures during operation and the operating pressure should be created in advance with a reference line diagram for the proper amount of enclosure, and the test run of the air conditioner should be performed to obtain the reference line diagram. It is a method to judge whether it is a deviation within the matching tolerance, for example, Hitachi Package Service Manual, page 87, 4.3.
(3) Described in 1984.
上記従来技術において、サイドグラスを設ける方法は冷
媒量の不足は目視により知ることができるが、冷媒量の
過剰を判定することはできない。したがって、過剰に封
入した場合に備えて、圧縮機の吸入ラインにアキュムレ
ータを設けて圧縮機へ冷媒液が戻らないようにする必要
があった。In the above-described conventional technique, the method of providing the side glass can visually recognize the shortage of the refrigerant amount, but cannot judge the excess amount of the refrigerant. Therefore, it has been necessary to provide an accumulator in the suction line of the compressor to prevent the refrigerant liquid from returning to the compressor in case of excessive filling.
また、冷媒量が適正がどうかのチェックは空気調和機の
機械室内の配管途中に設けたサイドグラスを見て、冷媒
の流れ状況を注視する必要があり簡便なものではなかっ
た。Further, it is not easy to check whether the amount of the refrigerant is proper, because it is necessary to look at the side glass provided in the middle of the pipe in the machine room of the air conditioner and pay attention to the flow condition of the refrigerant.
また、基準線図により、チェックする方法は温度計、圧
力計などの計器を必要とし、これらを見て判断する専門
的な技倆を要するものであった。また、減圧装置にキャ
ピラリチューブを使用する冷凍サイクルの場合などは、
簡単な減圧装置であるがために精度が不十分という問題
もあった。In addition, the method of checking according to the reference diagram requires instruments such as a thermometer and a pressure gauge, and requires specialized skill to judge by looking at these instruments. In the case of a refrigeration cycle that uses a capillary tube for the decompression device,
There is also a problem that the accuracy is insufficient because it is a simple decompression device.
本発明の目的は、現場の状況に応じて長さが選択される
接続用冷媒配管を有して冷凍サイクルを形成する空気調
和機において、冷媒封入量と関係の深い過冷却度を正確
に検知し、その結果を空気調和機本体キャビネットある
いは操作スイッチ部などの見やすい位置に冷媒量の不足
・適量および過剰のいずれの状況であるかがわかるよう
に表示し、正確で簡単な冷媒封入作業の可能な空気調和
機を提供することにある。An object of the present invention is to accurately detect a supercooling degree that is deeply related to the amount of filled refrigerant in an air conditioner that has a refrigerating cycle having a connecting refrigerant pipe whose length is selected according to the situation at the site. However, the result is displayed in an easy-to-see position such as the air conditioner main body cabinet or the operation switch section so that it can be seen whether the amount of refrigerant is insufficient / appropriate or excessive, and accurate and simple refrigerant filling work is possible. To provide a perfect air conditioner.
〔問題点を解決するための手段〕 熱源側熱交換器、利用側熱交換器、圧縮機、冷暖房回路
切換え用の四方切換弁、減圧装置および現場の状況に応
じて長さが選択される接続用冷媒配管を有して冷凍サイ
クルを形成してなる空気調和機において、前記熱源側熱
交換器および前記利用側熱交換器がそれぞれ運転時に凝
縮器となる場合の両熱交換器の出口側と前記両熱交換器
の中間部とにそれぞれ温度検出手段を設け、冷媒封入後
における前記空気調和機の運転時に前記両熱交換機の出
口側に設けた温度検出手段で検出した温度と、該熱交換
器の中間部に設けた前記温度検出手段で検出した凝縮温
度との温度差から過冷却度を求め、該過冷却度と、室内
温度、室外温度に応じて予め設定した基準値とを比較
し、前記冷凍サイクルの封入冷媒の量の不足、適量およ
び過剰のいずれであるかを判断する機能を有する演算手
段と、前記演算手段による演算結果に基づいて、前記封
入冷媒の量の不足、適量および過剰に対応して異種の表
示をする表示手段とを設けたことを特徴とするものであ
る。[Means for Solving Problems] Heat source side heat exchanger, utilization side heat exchanger, compressor, four-way switching valve for switching heating and cooling circuits, pressure reducing device, and connection whose length is selected according to the situation at the site In an air conditioner having a refrigerating cycle having a refrigerant pipe for use, the heat source side heat exchanger and the use side heat exchanger each have an outlet side of both heat exchangers when becoming a condenser during operation. Temperature detecting means is provided at the intermediate portion of both heat exchangers, and the temperature detected by the temperature detecting means provided at the outlet side of both heat exchangers during the operation of the air conditioner after the refrigerant is filled, and the heat exchange. The degree of supercooling is obtained from the temperature difference from the condensation temperature detected by the temperature detecting means provided in the middle part of the vessel, and the degree of supercooling is compared with a reference value preset according to the indoor temperature and the outdoor temperature. The amount of refrigerant enclosed in the refrigeration cycle Based on the calculation means having a function of determining whether it is a foot, an appropriate amount or an excess amount, and a calculation result by the arithmetic means, different types of displays are displayed corresponding to the insufficient amount, the appropriate amount and the excess amount of the enclosed refrigerant. The display means is provided.
冷媒を冷凍サイクル内に一定量封入して空気調和機を運
転すると、凝縮器出入口中間部に取付けた温度検出装置
は凝縮温度を検出し、もう１つの凝縮器の出口部に取付
けた温度検出装置は出口温度を検出する。そして、検出
した両方の温度を演算装置に入力し、演算すると冷凍サ
イクル上の過冷却度を算出できる。そして、減圧装置が
適正に流量制御している限り、通常使われる室内温度お
よび室外温度の範囲内では、過冷却度は冷媒封入量とほ
ゞ一定の関係に保たれるので、前記過冷却度を算出する
ことにより、冷媒封入量の不足・適量および過剰のいず
れであるかを判定することができる。次に判定結果を発
光ダイオード（LED）等により第１の点滅モード、連続
点灯モードおよび第２の点滅モードなど異種の表示とし
て表示するので、目視により容易に冷媒量の不足・適量
および過剰のいずれであるかが確認でき、したがって、
直ちに冷媒封入量を調整することができる。When a certain amount of refrigerant is enclosed in the refrigeration cycle and the air conditioner is operated, the temperature detector installed in the middle of the condenser inlet / outlet detects the condensing temperature, and the temperature detector attached to the outlet of the other condenser. Detects the outlet temperature. Then, by inputting both of the detected temperatures into a computing device and computing them, the degree of supercooling on the refrigeration cycle can be calculated. As long as the decompressor properly controls the flow rate, the subcooling degree is maintained in a substantially constant relationship with the refrigerant charge amount within the normally used room temperature and outdoor temperature ranges. By calculating, it is possible to determine whether the amount of refrigerant enclosed is insufficient / appropriate or excessive. Next, the judgment result is displayed as different kinds of displays such as the first blinking mode, the continuous lighting mode, and the second blinking mode by a light emitting diode (LED), etc., so that it is easy to visually check whether the amount of refrigerant is insufficient, proper or excessive. Can be confirmed, and therefore
It is possible to immediately adjust the amount of refrigerant charged.
以下、本発明を第１図乃至第３図に示す一実施例により
詳細に説明する。Hereinafter, the present invention will be described in detail with reference to an embodiment shown in FIGS.
圧縮機１、室外熱交換器すなわち熱源側交換器２、減圧
装置４、送風機21および冷暖房回路切換え用の四方切換
弁５は一つのユニットとしてまとめられ室外の設置され
る。室内熱交換器すなわち利用側熱交換器３は送風機31
などと別のユニット内にまとめられ室内に設置される。
11は室内外ユニットの配管接続用弁である。6aは室外熱
交換器２の出入口の中間部に取付けた温度検出器、6bは
前記室外熱交換器２が凝縮器となる場合における出口側
に取付けたサーミスタなどの温度検出器である。7aは室
内熱交換器３の出入口の中間部に取付けた温度検出器、
7bが前記室内熱交換器３が凝縮器となる場合における出
口側に取付けた温度検出器である。８は演算装置で、前
記各温度検出器を入力側に接続し、表示装置９を出力側
に接続している。The compressor 1, the outdoor heat exchanger, that is, the heat source side exchanger 2, the pressure reducing device 4, the blower 21, and the four-way switching valve 5 for switching the heating and cooling circuit are integrated as one unit and installed outdoors. The indoor heat exchanger, that is, the use side heat exchanger 3 is a blower 31
Etc. are installed in a room that is integrated into another unit.
Reference numeral 11 is a pipe connection valve for indoor and outdoor units. 6a is a temperature detector attached to the middle of the inlet and outlet of the outdoor heat exchanger 2, and 6b is a temperature detector such as a thermistor attached to the outlet side when the outdoor heat exchanger 2 is a condenser. 7a is a temperature detector mounted in the middle of the entrance and exit of the indoor heat exchanger 3,
Reference numeral 7b is a temperature detector attached to the outlet side when the indoor heat exchanger 3 serves as a condenser. Reference numeral 8 denotes an arithmetic device, which connects the temperature detectors to the input side and connects the display device 9 to the output side.
前記室内外の熱交換器2,3は送風機21,31により送風され
る空気と冷媒の熱交換作用により冷暖房の機能を供す
る。そして、室内ユニットと室外ユニットの間を接続す
る冷媒配管10は、現場の状況に応じて長さが選択され
る。従って、配管長さに応じて、その都度、施工現場に
て適正量の冷媒を封入する必要が生じる。The indoor and outdoor heat exchangers 2 and 3 serve as cooling and heating functions by the heat exchange action between the air blown by the blowers 21 and 31 and the refrigerant. The length of the refrigerant pipe 10 connecting the indoor unit and the outdoor unit is selected according to the situation at the site. Therefore, depending on the length of the pipe, it is necessary to fill a proper amount of refrigerant at the construction site each time.
第１図では、冷房運転時の冷媒の流れ方向を実線矢印で
示し、暖房運転時の場合を破線矢印で示す。In FIG. 1, the flow direction of the refrigerant during the cooling operation is indicated by a solid arrow, and the case during the heating operation is indicated by a broken arrow.
冷房運転時の場合について説明すると、圧縮機１から吐
出された高温高圧の冷媒ガスは、室外熱交換器２内にて
空気と熱交換して凝縮し、更に冷やされて過冷却状態と
なって減圧装置４に圧送される。該減圧装置４は前記圧
縮機１の吸入ガス状態が適切な過熱度となるように、開
度を変化させ冷媒の流量を制御する。冷房運転の場合に
は、室外熱交換器２、減圧装置４および室内熱交換器３
が、それぞれ凝縮器、膨張弁および蒸発器として機能す
るものである。そして冷房運転中は、室外熱交換器２の
出入口の中間部に設けた温度検出器6aは凝縮温度を検出
し、前記室外熱交換器２の出口部の温度検出器6bは過冷
却された冷媒液の温度をそれぞれ検出して、そのデータ
を演算装置８に送る。該演算装置８は前記両温度の温度
差を演算し過冷却度を求める。また、過冷却度の値が予
め設定した数値の範囲内にあるか否かを比較演算して、
その結果を信号として表示装置９に送る。該表示装置９
は例えば発光ダイオード（LED）、ランプ等によって、
冷媒量の不足、適量、および過剰に対応して異種の表示
をする。例えば発光ダイオードを使用した場合の一例を
示せば、冷媒量の不足の場合には、発光ダイオード（LE
D）のON時間をOFF時間より短かくして点滅させ、適正の
場合にはON状態のまゝとし、また過剰の場合にはON時間
をOFF時間より長くして点滅させるようにすることによ
り判別できる。Explaining the case of the cooling operation, the high-temperature and high-pressure refrigerant gas discharged from the compressor 1 exchanges heat with the air in the outdoor heat exchanger 2 to be condensed and further cooled to be in a supercooled state. The pressure is fed to the decompression device 4. The decompression device 4 changes the opening degree and controls the flow rate of the refrigerant so that the suction gas state of the compressor 1 has an appropriate superheat degree. In the case of cooling operation, the outdoor heat exchanger 2, the decompression device 4, and the indoor heat exchanger 3
Respectively function as a condenser, an expansion valve and an evaporator. During the cooling operation, the temperature detector 6a provided in the middle of the inlet / outlet of the outdoor heat exchanger 2 detects the condensation temperature, and the temperature detector 6b at the outlet of the outdoor heat exchanger 2 is a supercooled refrigerant. The temperature of each liquid is detected and the data is sent to the arithmetic unit 8. The arithmetic unit 8 calculates the temperature difference between the two temperatures to obtain the degree of supercooling. In addition, by comparing whether the value of the degree of supercooling is within a preset numerical value range,
The result is sent to the display device 9 as a signal. The display device 9
Is a light emitting diode (LED), lamp, etc.
Different types of indications are given according to the shortage, proper amount and excess of the refrigerant amount. For example, if an example of using a light emitting diode is shown, when the amount of refrigerant is insufficient, the light emitting diode (LE
It can be determined by blinking the ON time of D) so that it is shorter than the OFF time so that it remains in the ON state when appropriate, and when it is excessive, making the ON time longer than the OFF time and blinking. .
前記した発光ダイオード（LED）を使用した場合あるい
は一般的に使用されているランプ等の点滅・点灯により
表示する場合においても、第２図に示すようなフローチ
ャートによって、冷媒量の過不足の状態を表示すること
ができる。図において、T6bは凝縮器として機能する室
外熱交換器２の出入口の中間部の冷媒温度を表わし、T6
bは出口温度を表わしている。Even when the above-mentioned light emitting diode (LED) is used or when the commonly used lamp is displayed by blinking / lighting, the state as shown in FIG. Can be displayed. In FIG., T 6 b represents the refrigerant temperature in the middle of the doorway of the outdoor heat exchanger 2 functioning as a condenser, T 6
b represents the outlet temperature.
ΔT0は予め設定した設定温度で、T6a−T6b＝ΔTAとの差
｜Δ｜を過冷却度の範囲C1と比較演算して過不足を判定
する。ΔT 0 is a preset set temperature, and the difference | Δ | with T6 a −T6 b = ΔTA is compared with the range C 1 of the degree of supercooling to calculate excess or deficiency.
以上説明したように、試運転者は過冷却度すなわち冷媒
封入量が適正であるか否かを判断することができる。As described above, the test driver can determine whether the degree of supercooling, that is, the amount of refrigerant enclosed is appropriate.
また、過冷却度が不適切の場合、その信号を別の制御装
置例えば圧縮機の運転系路に設けたスイッチに送り、圧
縮機の運転を停止させることも可能である。Further, when the degree of subcooling is inappropriate, it is possible to stop the operation of the compressor by sending the signal to another control device, for example, a switch provided in the operation system path of the compressor.
次に暖房運転の場合には室内熱交換器３が凝縮器として
機能し、該室内熱交換器３の出入口の中間に設けた温度
検出器7aと出口部に設けた温度検出器7bによって前記演
算の場合と同様にして過冷却度を演算し、その結果を予
め設定した値と比較して冷媒量の過不足を判断すること
ができる。このように過冷却度の演算に必要なデータ
は、凝縮器となる熱交換器の出入口の中間部の温度と出
口部の温度であるので、この間蒸発器となる熱交換器側
の温度検出器からのデータは、前記演算装置８に入力さ
せないか、あるいは入力しても演算に必要なデータとし
て拾わないように演算装置８内に考慮されている。Next, in the heating operation, the indoor heat exchanger 3 functions as a condenser, and the calculation is performed by the temperature detector 7a provided in the middle of the inlet and outlet of the indoor heat exchanger 3 and the temperature detector 7b provided at the outlet. The degree of supercooling can be calculated in the same manner as in the above case, and the result can be compared with a preset value to determine whether the refrigerant amount is excessive or insufficient. In this way, the data necessary for calculating the degree of supercooling is the temperature of the middle part of the inlet and outlet of the heat exchanger that serves as the condenser and the temperature of the outlet, so the temperature detector on the side of the heat exchanger that serves as the evaporator The data from (1) is considered in the arithmetic unit 8 so as not to be input to the arithmetic unit 8 or not to be picked up as data necessary for arithmetic even if input.
第３図は、過冷却度と冷媒封入量の関連を表わしてい
る。FIG. 3 shows the relationship between the degree of supercooling and the amount of refrigerant enclosed.
実験結果によれば、図に示すように、適切に冷媒流量制
御をしている減圧装置のもとで、冷媒封入量が一定であ
れば過冷却度は通常の運転温度範囲内で、ある温度範囲
内に入る。これは、すなわち図に示すように過冷却度が
例えば約±2.5K以内であれば冷媒封入量は約±７％以内
というように過冷却度で冷媒封入量の適否を判定するこ
とができる。According to the experimental results, as shown in the figure, under the pressure reducing device that appropriately controls the refrigerant flow rate, the degree of supercooling is within a normal operating temperature range at a certain temperature if the refrigerant charge amount is constant. Enter the range. That is, as shown in the figure, if the degree of supercooling is within about ± 2.5K, for example, the amount of enclosed refrigerant is within about ± 7%.
図において、点線で表わした上限線が運転状態におい
て、室内外温度が低い条件の場合を表わし、下限線は逆
に室内外温度が高い条件の場合を表わしている。そし
て、実線は標準運転線を表わす。つまり、過冷却度検出
範囲に対して冷媒封入量検知範囲が第３図に示す上下限
の線図の範囲内にあれば冷媒量は適正と云うことで、発
光ダイオード（LED）あるいはランプを点灯し、ON状態
に維持することで、試運転者に冷媒封入量は適正である
ことを知らせる。また、冷媒封入量が少ない方に外れて
いれば発光ダイオードあるいはランプのON時間をOFF時
間より短かく点滅させる点滅モードで冷却量が不足であ
ることを表示し、冷媒封入量が多い方に外れていれば、
ON時間をOFF時間より長くして点滅させる点滅モードで
冷媒量が過剰であることを表示する。In the figure, the upper limit line represented by the dotted line represents the case where the indoor and outdoor temperatures are low in the operating state, and the lower limit line represents the case where the indoor and outdoor temperatures are high. The solid line represents the standard driving line. In other words, if the refrigerant enclosed amount detection range is within the upper and lower limit diagram shown in Fig. 3 with respect to the supercooling degree detection range, it means that the refrigerant amount is appropriate, and the light emitting diode (LED) or lamp is turned on. However, by keeping it in the ON state, the test driver is informed that the refrigerant charge amount is appropriate. In addition, if the refrigerant charge amount is out of the range, the flashing mode that blinks the ON time of the light emitting diode or lamp shorter than the OFF time indicates that the cooling amount is insufficient, and the refrigerant charge amount is out If
Indicates that the amount of refrigerant is excessive in a blinking mode in which the ON time is made longer than the OFF time and blinks.
本発明によれば、過冷却度を演算して、冷媒封入量の適
否を目視で判断できるので、空気調和機の施工現場での
冷媒封入作業が簡単にしかも正確に行うことができる。According to the present invention, the degree of subcooling can be calculated and the adequacy of the refrigerant charge amount can be visually judged, so that the refrigerant charge operation at the construction site of the air conditioner can be performed easily and accurately.
そして、施工の効率化、冷媒量の過不足による運転の不
具合を防止できるという実用的な効果がある。Then, there is a practical effect that the efficiency of construction can be improved, and the malfunction of the operation due to the excess or deficiency of the refrigerant amount can be prevented.
第１図は、本発明の空気調和機の冷凍サイクル構成図、
第２図は、演算装置のフローチャート、第３図は、過冷
却度と冷媒封入量の関係線図である。 １…圧縮機、２…室外熱交換器、３…室内熱交換器、４
…減圧装置、５…四方切換弁 6a,7a…熱交換器の出入口の中間部の温度検出器、6b,7b
…出口部の温度検出器 ８…演算装置、９…表示装置、10…接続配管。FIG. 1 is a refrigeration cycle block diagram of the air conditioner of the present invention,
FIG. 2 is a flow chart of the arithmetic unit, and FIG. 3 is a relational diagram between the degree of supercooling and the amount of refrigerant charged. 1 ... Compressor, 2 ... Outdoor heat exchanger, 3 ... Indoor heat exchanger, 4
... Pressure reducing device, 5 ... Four-way switching valve 6a, 7a ... Temperature detector in the middle of the inlet and outlet of the heat exchanger, 6b, 7b
... Temperature detector at the outlet 8 ... Calculator, 9 ... Display, 10 ... Connection piping.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 佐野 孝 静岡県清水市村松390番地 株式会社日立 製作所清水工場内 (72)発明者 衛藤 廣則 静岡県清水市村松390番地 株式会社日立 製作所清水工場内 (72)発明者 小国 研作 静岡県清水市村松390番地 株式会社日立 製作所機械研究所内 (72)発明者 安田 弘 静岡県清水市村松390番地 株式会社日立 製作所機械研究所内 (72)発明者 黒田 重昭 静岡県清水市村松390番地 株式会社日立 製作所機械研究所内 (56)参考文献 特開 昭54−97853（ＪＰ，Ａ) 特開 昭59−100374（ＪＰ，Ａ) 特開 昭56−85644（ＪＰ，Ａ) 特開 昭49−19442（ＪＰ，Ａ) 特開 昭59−69663（ＪＰ，Ａ) 特開 昭60−175986（ＪＰ，Ａ) 実開 昭59−191570（ＪＰ，Ｕ) 実開 昭58−13427（ＪＰ，Ｕ) 特公 昭57−61146（ＪＰ，Ｂ１) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Sano 390 Muramatsu, Shimizu City, Shizuoka Prefecture, Shimizu Plant, Hitachi, Ltd. (72) Hironori Eto, 390 Muramatsu, Shimizu City, Shizuoka, Hitachi, Ltd., Shimizu Plant, Hitachi, Ltd. (72) Inventor Kensaku Oguni, 390 Muramatsu, Shimizu, Shizuoka Prefecture, Hitachi, Ltd., Mechanical Research Laboratory (72) Inventor, Hiroshi Yasuda, 390, Muramatsu, Shimizu, Shizuoka, Hitachi, Ltd., Mechanical Research Laboratory, Ltd. (72) Inventor, Shigeaki Kuroda, Shizuoka 390, Muramatsu, Shimizu, Japan (56) References, Hitachi, Ltd., Mechanical Research Laboratory (56) Reference JP-A-54-97853 (JP, A) JP-A-59-100374 (JP, A) JP-A-56-85644 (JP, A) ) JP-A-49-19442 (JP, A) JP-A-59-69663 (JP, A) JP-A-60-175986 (JP, A) Actual development 59-191570 (JP, A) ) JitsuHiraku Akira 58-13427 (JP, U) Tokuoyake Akira 57-61146 (JP, B1)
Claims (3)
機、冷暖房回路切換え用の四方切換弁、減圧装置および
現場の状況に応じて長さが選択される接続用冷媒配管を
有して冷凍サイクルを形成してなる空気調和機におい
て、 前記熱源側熱交換器および前記利用側熱交換器がそれぞ
れ運転時に凝縮器となる場合の両熱交換器の出口側と前
記両熱交換器の中間部とにそれぞれ温度検出手段を設
け、冷媒封入後における前記空気調和機の運転時に前記
両熱交換器の出口側に設けた温度検出手段で検出した温
度と、該熱交換器の中間部に設けた前記温度検出手段で
検出した凝縮温度との温度差から過冷却度を求め、該過
冷却度と、室内温度、室外温度に応じて予め設定した基
準値とを比較し、前記冷凍サイクルの封入冷媒の量の不
足、適量および過剰のいずれであるかを判断する機能を
有する演算手段と、前記演算手段による演算結果に基づ
いて、前記封入冷媒の量の不足、適量および過剰に対応
して異種の表示をする表示手段と、を設けたことを特徴
とする冷媒量検知装置を備えた空気調和機。1. A heat source side heat exchanger, a use side heat exchanger, a compressor, a four-way switching valve for switching a heating / cooling circuit, a pressure reducing device, and a connecting refrigerant pipe whose length is selected according to the situation at the site. In the air conditioner configured to form a refrigeration cycle, the heat source side heat exchanger and the use side heat exchanger each serve as a condenser during operation, and the outlet sides of both heat exchangers and the both heat exchangers Temperature detecting means respectively in the intermediate part of the heat exchanger, the temperature detected by the temperature detecting means provided on the outlet side of both heat exchangers during the operation of the air conditioner after the refrigerant is filled, and the intermediate part of the heat exchanger. The degree of supercooling is obtained from the temperature difference from the condensation temperature detected by the temperature detecting means provided in the subcooling degree, and the degree of supercooling is compared with a reference value preset according to the indoor temperature and the outdoor temperature, and the refrigeration cycle is set. Insufficient, proper and excess amount of filled refrigerant A calculation means having a function of determining which is, and a display means for displaying different kinds in response to a shortage, an appropriate amount and an excess of the amount of the enclosed refrigerant, based on a calculation result by the calculation means. An air conditioner provided with a refrigerant amount detection device characterized by being provided.
空気調和機の運転時に蒸発器となる熱交換器に設けた前
記温度検出手段の出力信号を無視する手段を設けたこと
を特徴とする特許請求の範囲第１項記載の冷媒量検知装
置を備えた空気調和機。2. The arithmetic unit is provided with means for ignoring an output signal of the temperature detecting means provided in a heat exchanger serving as an evaporator when the air conditioner is operated after the refrigerant is charged. An air conditioner comprising the refrigerant amount detection device according to claim 1.
の第１の点滅モード、連続点灯モードおよび第２の点滅
モードにより、それぞれ、前記封入冷媒の量の不足、適
量および過剰を表示するものであることを特徴とする特
許請求の範囲第１項記載の冷媒量検知装置を備えた空気
調和機。3. The display means is a light emitting diode (LED)
The first flashing mode, the continuous lighting mode, and the second flashing mode of No. 1 indicate a shortage, an appropriate amount, and an excess of the amount of the enclosed refrigerant, respectively. Air conditioner equipped with the refrigerant amount detection device of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61000571A JPH0721374B2 (en) | 1986-01-08 | 1986-01-08 | Air conditioner equipped with refrigerant amount detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61000571A JPH0721374B2 (en) | 1986-01-08 | 1986-01-08 | Air conditioner equipped with refrigerant amount detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62158966A JPS62158966A (en) | 1987-07-14 |
| JPH0721374B2 true JPH0721374B2 (en) | 1995-03-08 |
Family
ID=11477396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61000571A Expired - Lifetime JPH0721374B2 (en) | 1986-01-08 | 1986-01-08 | Air conditioner equipped with refrigerant amount detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0721374B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006090451A1 (en) * | 2005-02-24 | 2006-08-31 | Mitsubishi Denki Kabushiki Kaisha | Air conditioning system |
| WO2007069625A1 (en) * | 2005-12-16 | 2007-06-21 | Daikin Industries, Ltd. | Air conditioner |
| US10845098B2 (en) | 2017-05-26 | 2020-11-24 | Hitachi-Johnson Controls Air Conditioning, Inc. | Air conditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2564328B2 (en) * | 1987-10-21 | 1996-12-18 | 株式会社日立製作所 | Refrigerant shortage detection device for air conditioner |
| JP2756536B2 (en) * | 1989-05-15 | 1998-05-25 | 日本電信電話株式会社 | Partition drive |
| JPH0361268U (en) * | 1989-10-18 | 1991-06-17 | ||
| JP2997487B2 (en) * | 1989-12-13 | 2000-01-11 | 株式会社日立製作所 | Refrigeration apparatus and method for indicating amount of refrigerant in refrigeration apparatus |
| JP3601130B2 (en) * | 1995-10-06 | 2004-12-15 | 株式会社デンソー | Refrigeration equipment |
| JPH10122711A (en) * | 1996-10-18 | 1998-05-15 | Matsushita Electric Ind Co Ltd | Refrigeration cycle control device |
| JP4270197B2 (en) * | 2004-06-11 | 2009-05-27 | ダイキン工業株式会社 | Air conditioner |
| KR20070032683A (en) | 2004-06-11 | 2007-03-22 | 다이킨 고교 가부시키가이샤 | Air conditioner |
| JP4899549B2 (en) | 2005-10-31 | 2012-03-21 | ダイキン工業株式会社 | Compressor operating method of refrigeration apparatus and refrigeration apparatus |
| JP4120676B2 (en) | 2005-12-16 | 2008-07-16 | ダイキン工業株式会社 | Air conditioner |
| JP4839861B2 (en) * | 2006-01-30 | 2011-12-21 | ダイキン工業株式会社 | Air conditioner |
| JP4752541B2 (en) * | 2006-03-01 | 2011-08-17 | パナソニック株式会社 | Air conditioner |
| JP2007255818A (en) * | 2006-03-24 | 2007-10-04 | Mitsubishi Electric Corp | Diagnostic apparatus for refrigeration cycle apparatus, heat source side unit, use side unit and refrigeration cycle apparatus having the diagnostic apparatus |
| JP4902866B2 (en) * | 2007-03-23 | 2012-03-21 | 三菱電機株式会社 | Refrigerant filling method |
| JP5164527B2 (en) * | 2007-11-02 | 2013-03-21 | 日立アプライアンス株式会社 | Air conditioner |
| CN107525208A (en) * | 2017-07-10 | 2017-12-29 | 珠海格力电器股份有限公司 | Air conditioner fluorine deficiency detection method and device |
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Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5497853A (en) * | 1978-01-18 | 1979-08-02 | Fuji Heavy Ind Ltd | Refrigerant deficiency detector for refrigerator |
| AT375716B (en) * | 1980-08-16 | 1984-09-10 | Dyckerhoff & Widmann Ag | RECOVERABLE FORMWORK FOR THE ANCHORING AREA OF A TENSION LINK IN A CONCRETE COMPONENT |
| JPS5813427U (en) * | 1981-07-20 | 1983-01-27 | 三洋電機株式会社 | Air conditioner display device |
| JPS5969663A (en) * | 1982-10-12 | 1984-04-19 | 三菱重工業株式会社 | Refrigeration cycle |
| JPS59100374A (en) * | 1982-11-30 | 1984-06-09 | 日産自動車株式会社 | Air cooling device for car |
| JPS59191570U (en) * | 1983-06-07 | 1984-12-19 | 株式会社ボッシュオートモーティブ システム | Refrigerant amount detection device for vehicle refrigeration cycle |
| JPS60175986A (en) * | 1984-02-21 | 1985-09-10 | 松下電器産業株式会社 | air conditioner |
| JPS6250471U (en) * | 1985-09-18 | 1987-03-28 |
-
1986
- 1986-01-08 JP JP61000571A patent/JPH0721374B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006090451A1 (en) * | 2005-02-24 | 2006-08-31 | Mitsubishi Denki Kabushiki Kaisha | Air conditioning system |
| WO2007069625A1 (en) * | 2005-12-16 | 2007-06-21 | Daikin Industries, Ltd. | Air conditioner |
| AU2006324542B2 (en) * | 2005-12-16 | 2010-03-18 | Daikin Industries, Ltd. | Air conditioner |
| US7854134B2 (en) | 2005-12-16 | 2010-12-21 | Daikin Industries, Ltd. | Air conditioner |
| US10845098B2 (en) | 2017-05-26 | 2020-11-24 | Hitachi-Johnson Controls Air Conditioning, Inc. | Air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62158966A (en) | 1987-07-14 |
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