JPH0325093Y2 - - Google Patents
Info
- Publication number
- JPH0325093Y2 JPH0325093Y2 JP1982148864U JP14886482U JPH0325093Y2 JP H0325093 Y2 JPH0325093 Y2 JP H0325093Y2 JP 1982148864 U JP1982148864 U JP 1982148864U JP 14886482 U JP14886482 U JP 14886482U JP H0325093 Y2 JPH0325093 Y2 JP H0325093Y2
- Authority
- JP
- Japan
- Prior art keywords
- expansion valve
- electric expansion
- opening degree
- refrigeration cycle
- compressor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000005057 refrigeration Methods 0.000 claims description 30
- 239000003507 refrigerant Substances 0.000 description 12
- 238000010586 diagram Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 230000001568 sexual effect Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Air Conditioning Control Device (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Description
【考案の詳細な説明】
［考案の技術分野］
この考案は、圧縮機の電源周波数に応じて開度
可変が行なわれる電動式膨張弁を用いて冷凍サイ
クルを構成してなる冷凍サイクル装置の改善に関
する
［考案の技術的背景とその問題点］
近年、冷凍サイクル装置にあつては、多様な信
号媒体にて冷凍サイクル運転の制御を行なうもの
ができるものとして、電動式膨張弁を用いて冷凍
サイクルを構成するようにしたものが開発されて
いる。[Detailed description of the invention] [Technical field of the invention] This invention is an improvement of a refrigeration cycle device in which a refrigeration cycle is constructed using an electric expansion valve whose opening degree is variable according to the power frequency of the compressor. [Technical background of the invention and its problems] In recent years, refrigeration cycle devices have become capable of controlling the operation of the refrigeration cycle using various signal media. A system has been developed that consists of:
この種の冷凍サイクルとしては、電源周波数の
可変で能力が可変される圧縮機を備えるととも
に、室外側熱交換器（凝縮器）と室内側熱交換器
（蒸発器）との間に、マイクロコンピユーターで
構成される制御部により開度が制御される電動式
膨張弁を配設して構成される。そして、制御部で
圧縮機の電源周波数に応じて電動式膨張弁をパル
ス的に制御している。詳しくは、電動式膨張弁の
全開から全閉までの間を数十〜数百にきざみ、こ
のきざみを１パルスとして制御部から圧縮機の電
源周波数にもとづき電動式膨張弁へ指示パルスを
出力することで、制御部の命令に応じて電動式膨
張弁のモータを正回転、逆回転させて、所期の冷
凍サイクル運転を行なうようにしている。 This type of refrigeration cycle is equipped with a compressor whose capacity can be varied by changing the power frequency, and a microcomputer is installed between the outdoor heat exchanger (condenser) and the indoor heat exchanger (evaporator). It is constructed by disposing an electric expansion valve whose opening degree is controlled by a control section consisting of. The control unit pulse-controls the electric expansion valve according to the power frequency of the compressor. Specifically, the range between fully open and fully closed of the electric expansion valve is set in increments of several tens to hundreds, and each increment is regarded as one pulse, and the control unit outputs an instruction pulse to the electric expansion valve based on the power frequency of the compressor. Accordingly, the motor of the electric expansion valve is rotated forward or backward in accordance with commands from the control section to perform the desired refrigeration cycle operation.
ところが、この種の冷凍サイクルにおいては、
冷凍サイクルの運転の電源OFF時における電動
式膨張弁の開度位置を記憶できないものがほとん
どで、冷凍サイクル運転中、電源が切れると、そ
の現在の開度位置が制御部の記憶部から（揮発性
の記憶部）から消えてしまうといつた問題があ
る。 However, in this type of refrigeration cycle,
Most of the refrigeration cycle operation cannot remember the opening position of the electric expansion valve when the power is turned off, and when the power is turned off while the refrigeration cycle is running, the current opening position is stored in the memory of the control unit (volatile). There is a problem where it disappears from the sexual memory (sexual memory).
このため、電源が切れると、その開度位置にあ
るのかがわからなく、つぎに電源を入力して目的
とする開度位置に設定する際、あとどれだけの信
号を送つて、どれだけ開度を調整すればよいのか
がわからず、所期の電動式膨張弁の制御が困難に
なるといつた不都合を生じるものであつた。 For this reason, when the power is turned off, it is not known whether the opening is at the desired opening position, and when the power is turned on next and the desired opening position is set, how many more signals must be sent and how much is the opening position? However, it is difficult to know how to adjust the electric expansion valve, which makes it difficult to control the electric expansion valve as desired.
［考案の目的］
この考案は上記事情に着目してなされたもの
で、その目的とするところは、冷凍サイクルの電
源入切に左右されることなく、電動式膨張弁の開
度を目的とする開度に設定することができる冷凍
サイクル装置を提供することにある。[Purpose of the invention] This invention was made with attention to the above circumstances, and its purpose is to control the opening of the electric expansion valve without being affected by the power on/off of the refrigeration cycle. An object of the present invention is to provide a refrigeration cycle device that can be set to an opening degree.
［考案の構成］
この考案は、電源周波数の可変で能力が可変さ
れる圧縮機を有し、かつ凝縮器と蒸発器との間に
モータで駆動される電動式膨張弁を設けて構成さ
れた冷凍サイクルと、前記圧縮機に入力される電
源周波数に応じた膨張弁開度が記憶される揮発性
の記憶部と、この記憶部に記憶された膨張弁開度
にしたがつて前記電動式膨張弁の開度を制御する
手段と、前記冷凍サイクルの運転の電源入力時に
前記電動式膨張弁の開度を弁開度の基準となる全
開位置に調整する手段と、この全開位置での開度
を基準に前記電動式膨張弁の前記冷凍サイクルの
運転起動時における開度を前記記憶部に入力され
る膨張弁開度に応じて定める手段とを設けたこと
にある。これにより、電源の入切にかかわらずに
目的とする開度に設定できるようにすると同時
に、起動時間を短縮できるようにするものであ
る。[Structure of the device] This device has a compressor whose capacity can be varied by changing the power frequency, and an electric expansion valve driven by a motor is provided between the condenser and the evaporator. a refrigeration cycle, a volatile storage section that stores an expansion valve opening degree corresponding to the power frequency input to the compressor, and a volatile storage section that stores the expansion valve opening degree that is stored in the storage section; means for controlling the opening degree of the valve; means for adjusting the opening degree of the electric expansion valve to a fully open position serving as a reference for the valve opening degree when power is input for operation of the refrigeration cycle; and the opening degree at the fully open position. means for determining the opening degree of the electrically operated expansion valve at the time of starting operation of the refrigeration cycle in accordance with the expansion valve opening degree inputted into the storage section. This makes it possible to set the desired opening degree regardless of whether the power is on or off, and at the same time, it is possible to shorten the startup time.
［考案の実施例］
以下、この考案を図面に示す実施例にもとづい
て説明する。第１図はこの考案の一実施例を示
し、１はインバータ回路（図示しない）に接続さ
れ、電源周波数の可変で能力が可変される圧縮
機、２は四方弁、３は室外側熱交換器、４は室内
側熱交換器である。そして、これら各機器は冷媒
循環路５で順次連結される。また凝縮器、蒸発器
となる室外側熱交換器３と室内側熱交換器４との
間には、電動式膨張弁６が設けられ、冷暖房運転
可能な冷凍サイクルを構成している。そして、こ
のように構成される冷凍サイクル７の電動式膨張
弁６の構造が第２図に示されている。ここで、電
動式膨張弁６について説明すれば、図中８はこの
電動式膨張弁６を駆動するモータの回転子で、回
転子８と針状弁９、弁軸１０およびおねじ１１と
を一体化し、おねじ１１には弁本体１２に固定さ
れためねじ１３が嵌合しねじ部１４を構成し、弁
軸１０を含むモータの回転子８は非磁性体からな
る薄肉底付のケース１５内に収納され、ケース１
５は冷媒の出入口１６，１７と弁座１８を有する
弁本体１２にプラズマ溶接などにより気密的に一
体化されている。ケース１５の外周にはモータの
回転子８に対応する位置に固定子コイル１９が固
定されている。したがつて、電動式膨張弁６は、
固定子コイル１９に通電することにより、回転子
８が回転しながら軸方向へ直進し、それに伴つて
針状弁９と弁座１８との間に形成される絞り部２
０の開度が変化して出入口１６，１７間を流れる
冷媒量を制御することができるようになつてい
る。[Embodiments of the invention] This invention will be described below based on embodiments shown in the drawings. Figure 1 shows an embodiment of this invention, in which 1 is a compressor connected to an inverter circuit (not shown) and whose capacity can be varied by changing the power frequency, 2 is a four-way valve, and 3 is an outdoor heat exchanger. , 4 is an indoor heat exchanger. Each of these devices is sequentially connected through a refrigerant circulation path 5. Moreover, an electric expansion valve 6 is provided between the outdoor heat exchanger 3 and the indoor heat exchanger 4, which serve as a condenser and an evaporator, to constitute a refrigeration cycle capable of air-conditioning and heating operation. The structure of the electric expansion valve 6 of the refrigeration cycle 7 constructed in this way is shown in FIG. 2. Here, to explain the electric expansion valve 6, 8 in the figure is a rotor of a motor that drives this electric expansion valve 6, and the rotor 8, needle valve 9, valve stem 10, and male thread 11 are connected A female thread 13 fixed to the valve body 12 is fitted into the male thread 11 to form a threaded portion 14, and the rotor 8 of the motor including the valve shaft 10 is a case 15 with a thin bottom made of a non-magnetic material. Case 1
5 is airtightly integrated with a valve body 12 having refrigerant inlets and outlets 16 and 17 and a valve seat 18 by plasma welding or the like. A stator coil 19 is fixed to the outer periphery of the case 15 at a position corresponding to the rotor 8 of the motor. Therefore, the electric expansion valve 6 is
By energizing the stator coil 19, the rotor 8 moves straight in the axial direction while rotating, and as a result, the throttle portion 2 is formed between the needle valve 9 and the valve seat 18.
The amount of refrigerant flowing between the ports 16 and 17 can be controlled by changing the degree of opening.
一方、図中２１はマイクロコンピユーターで構
成された制御部である。制御部２１には、第６図
に示されるように揮発性の記憶部２３、カウンタ
ー２４、タイマー２５、比較回路２６が内蔵され
ている。そして、制御部２１の出力側は電動式膨
張弁６のモータに信号線２２ａ、駆動回路２７を
介して接続される。さらに制御部２１の出力側
は、圧縮機１の電源入力部１ａに信号線２２ｂを
介して接続され、圧縮機１の電源入力部１ａへ出
力される電源周波数にもとづいて、第４図に示す
ように電動式膨張弁６の開度を、周波数に応じ各
種比例的に可変することができるようになつてい
る。また制御部２１は、冷凍サイクルの運転の電
源入力が行なわれると、タイマー２５が作動し、
その時間内において電動式膨張弁６のモータを駆
動し、開度を弁開度の基準となる機械的にロツク
される全開（MAX）の位置に調整するようにし
ている（定位置に調整する手段）。さらに制御部
２１は、電源入力部１ａに投入される電源周波数
に応じた電動式膨張弁６の開度を記憶部２３に記
憶するようにしている。そして、制御部２１は、
上記全開位置の開度と比較回路２６を通じ比較
し、双方が同じとなるよう電源入力部１ａに投入
される電源周波数をカウンター２４を用いて制御
した後、通常の周波数可変の制御に入るようにし
ている。つまり、全開定位置での開度を基準に電
動式膨張弁６の開度を電源周波数に応じて制御す
るようになつている。 On the other hand, numeral 21 in the figure is a control section composed of a microcomputer. As shown in FIG. 6, the control section 21 includes a volatile storage section 23, a counter 24, a timer 25, and a comparison circuit 26. The output side of the control section 21 is connected to the motor of the electric expansion valve 6 via a signal line 22a and a drive circuit 27. Further, the output side of the control section 21 is connected to the power input section 1a of the compressor 1 via a signal line 22b, and is based on the power frequency output to the power input section 1a of the compressor 1 as shown in FIG. Thus, the opening degree of the electric expansion valve 6 can be varied proportionally in various ways depending on the frequency. Further, the control unit 21 operates the timer 25 when power is input for operation of the refrigeration cycle.
Within that time, the motor of the electric expansion valve 6 is driven to adjust the opening to the mechanically locked fully open (MAX) position, which is the standard for the valve opening (adjust to the fixed position). means). Further, the control unit 21 stores in the storage unit 23 the opening degree of the electric expansion valve 6 according to the frequency of the power supplied to the power input unit 1a. Then, the control unit 21
After comparing the opening degree at the fully open position with the comparator circuit 26 and controlling the power frequency applied to the power input section 1a using the counter 24 so that both are the same, normal frequency variable control is started. ing. In other words, the opening degree of the electric expansion valve 6 is controlled based on the opening degree at the fully open position in accordance with the power supply frequency.
つぎに、このように構成された冷凍サイクル装
置の作用について、第３図に示すフローチヤート
にもとづいて説明する。 Next, the operation of the refrigeration cycle device configured as described above will be explained based on the flowchart shown in FIG. 3.
まず、冷凍サイクルの電源をONにする。これ
により、まず電動式膨張弁６の開度が制御部６の
時間Ｔのタイマー２５にて所定の時間TM≦Ｔ内
で、全開（MAX）の位置に設定される。このと
きの制御部２１の記憶部２３のメモリーＭは０で
あり、また全開（MAX）の状態はパルス数Ｐで
入力される。こののち、現在の圧縮機１の電源周
波数Hzが入力されることにより、その周波数に応
じた電動式膨張弁６の開度がパルスP2として記
憶部２３にメモリーされ、メモリーされた周波数
HzＭと全開（MAX）の周波数数Hzとが比較回路
２６で比較され、その差がカウンター２４でパル
スカウントされて演算される。そして、その差が
同じならば、電動式膨張弁６の開度は目的とする
開度として維持され、また周波数Hzが周波数HzＭ
よりも大きいときには、開度を開く側にパルスの
きざみ〓Ｐを付加して、このきざみパルスで調整
したパルスP3をメモリーして、電源周波数HzＭ
に応じた周波数Hz３で第５図で示すように、定位
置を基準に電動式膨張弁６の開度を目的とする開
度に調整することになり、所期の冷凍サイクル運
転（冷房および暖房共）が行なわれる。 First, turn on the power to the refrigeration cycle. As a result, first, the opening degree of the electric expansion valve 6 is set to the fully open (MAX) position by the timer 25 of the control unit 6 for a time T within a predetermined time T M ≦T. At this time, the memory M of the storage unit 23 of the control unit 21 is 0, and the fully open (MAX) state is inputted by the number of pulses P. After that, when the current power frequency Hz of the compressor 1 is input, the opening degree of the electric expansion valve 6 according to the frequency is memorized as a pulse P 2 in the storage section 23, and the memorized frequency
HzM and the fully open (MAX) frequency number Hz are compared by a comparator circuit 26, and the difference between them is counted and calculated by a counter 24. If the difference is the same, the opening degree of the electric expansion valve 6 is maintained as the target opening degree, and the frequency Hz is the frequency HzM.
When the value is larger than , add a pulse increment 〓P to the side that opens the opening, store the pulse P 3 adjusted with this increment pulse, and set the power supply frequency HzM.
As shown in Fig. 5 at a frequency of Hz3 corresponding to joint) will be carried out.
かくして、電源入力の際に電動式膨張弁６の開
度を、弁開度の基準となる全開位置に調整し、そ
の全開位置の開度を基準に電動式膨張弁６の開度
を圧縮機１の電源周波数に応じて制御したこと
で、従来、問題とされていた電動式膨張弁６の開
度位置がわからなくなることなしに、圧縮機１の
電源周波数と対応した制御を行なうことができる
ようになり、電源の入切に関係なく電動式膨張弁
６の開度を目的とする開度位置に設定することが
できる。 Thus, when power is input, the opening degree of the electric expansion valve 6 is adjusted to the full open position, which is the standard for the valve opening degree, and the opening degree of the electric expansion valve 6 is adjusted to the full open position, which is the standard for the valve opening degree, and the opening degree of the electric expansion valve 6 is adjusted to the full open position, which is the standard for the valve opening degree. By performing control according to the power supply frequency of the compressor 1, it is possible to perform control corresponding to the power supply frequency of the compressor 1 without losing knowledge of the opening position of the electric expansion valve 6, which has been a problem in the past. Thus, the opening degree of the electric expansion valve 6 can be set to the desired opening position regardless of whether the power is turned on or off.
しかも、電動式膨張弁６の全開位置を基準とし
たことにより、冷凍サイクルは運転開始当初から
冷媒が流通するようになるので、運転開始から冷
凍サイクルが安定するまでの時間、すなわち起動
時間を短縮することができる。また圧縮機１は運
転開始当初から冷媒を吸込むので、運転当初から
圧縮機１の内部ではオイルの循環が行われ、冷凍
サイクルの運転当初から圧縮機１を円滑に運転さ
せることができる。そのうえ、圧縮機１は冷媒の
吸込みによつて運転当初から冷却されるので、圧
縮機１の信頼性も高い。 Moreover, by setting the fully open position of the electric expansion valve 6 as the reference, refrigerant will begin to flow through the refrigeration cycle from the beginning of operation, reducing the time from the start of operation until the refrigeration cycle stabilizes, that is, the start-up time. can do. Furthermore, since the compressor 1 sucks refrigerant from the beginning of operation, oil is circulated inside the compressor 1 from the beginning of operation, and the compressor 1 can be operated smoothly from the beginning of operation of the refrigeration cycle. Moreover, since the compressor 1 is cooled from the beginning of operation by sucking refrigerant, the reliability of the compressor 1 is also high.
なお、第１図において、実線で示す矢印は冷房
時の冷媒の流れ、破線で示す矢印は暖房のときの
冷媒の流れを示す。 In FIG. 1, solid line arrows indicate the flow of refrigerant during cooling, and broken line arrows indicate the flow of refrigerant during heating.
また第７図に示すものは他の実施例を示し、上
述した実施例における電動式膨張弁６の初期作動
を、圧縮機１の起動後、数秒間〓ｔ、遅延して信
号を与えて、圧縮機１の起動から遅れて電動式膨
張弁６の開閉動作を行なうようにしたものであ
る。このようにすれば、初期時における電動式膨
張弁６の内部に寝込んでいる油、冷媒などの抵抗
が除去され、電動式膨張弁６における信号と開度
との不一致をなくすことができ、安定した電動式
膨張弁６の制御を得ることができる。 7 shows another embodiment, in which the initial operation of the electric expansion valve 6 in the embodiment described above is delayed by several seconds t after the start of the compressor 1, and a signal is given. The electric expansion valve 6 is opened and closed with a delay after the compressor 1 is started. In this way, the resistance of oil, refrigerant, etc. lying inside the electric expansion valve 6 at the initial stage can be removed, and the discrepancy between the signal and the opening degree of the electric expansion valve 6 can be eliminated, resulting in stable operation. It is possible to control the electric expansion valve 6 in a manner similar to that described above.
［考案の効果］
以上説明したようにこの考案によれば、電源入
力の際から圧縮機の電源周波数と対応した電動式
膨張弁の制御ができるようになり、電源の入切り
に関係なく電動式膨張弁を目的の開度に設定する
ことができる。しかも、電動式膨張弁の全開位置
を基準としたことで、冷凍サイクルは運転開始当
初から冷媒が流通するようになるので運転開始か
ら冷凍サイクルが安定するまでに必要な起動時間
を短縮することができる。そのうえ、冷凍サイク
ルの圧縮機は運転開始当初から冷媒を吸込むの
で、運転当初から圧縮機の内部ではオイルの循環
が行われ、冷凍サイクルの運転当初から圧縮機を
円滑に運転させることができる。と同時に圧縮機
は、冷媒の吸込みによつて運転当初から冷却され
るので、圧縮機の信頼性も高い。[Effects of the invention] As explained above, according to this invention, the electric expansion valve can be controlled in accordance with the power frequency of the compressor from the time of power input, and the electric expansion valve can be controlled regardless of whether the power is turned on or off. The expansion valve can be set to a desired opening degree. Moreover, by setting the fully open position of the electric expansion valve as the standard, refrigerant will begin to flow through the refrigeration cycle from the beginning of operation, reducing the start-up time required from the start of operation until the refrigeration cycle stabilizes. can. Moreover, since the compressor of the refrigeration cycle sucks refrigerant from the beginning of operation, oil is circulated inside the compressor from the beginning of operation, and the compressor can be operated smoothly from the beginning of operation of the refrigeration cycle. At the same time, since the compressor is cooled from the beginning of operation by sucking refrigerant, the reliability of the compressor is also high.
第１図はこの考案の一実施例の冷凍サイクル装
置を示す構成図、第２図はその電動式膨張弁の構
造を示す断面図、第３図は電動式膨張弁の動作推
移を示すフローチヤート図、第４図は電動式膨張
弁の開度とパルスとの関係を示すグラフ、第５図
は定位置を基準に電動式膨張弁がパルス制御で目
的の開度に調整される状態を示すグラフ、第６図
は制御回路を示すブロツク図、第７図はこの考案
の他の実施例としての電動式膨張弁の動作状況を
示す線図である。
１……圧縮機、３……室外側熱交換器、４……
室内側熱交換器、６……電動式膨張弁、７……冷
凍サイクル、２１……制御部、２３……記憶部。
Fig. 1 is a configuration diagram showing a refrigeration cycle device according to an embodiment of this invention, Fig. 2 is a sectional view showing the structure of the electric expansion valve, and Fig. 3 is a flow chart showing the operation transition of the electric expansion valve. Figure 4 is a graph showing the relationship between the opening degree of the electric expansion valve and the pulse, and Figure 5 shows the state in which the electric expansion valve is adjusted to the desired opening degree by pulse control based on the fixed position. 6 is a block diagram showing the control circuit, and FIG. 7 is a diagram showing the operating status of an electric expansion valve as another embodiment of this invention. 1...Compressor, 3...Outdoor heat exchanger, 4...
Indoor heat exchanger, 6...Electric expansion valve, 7...Refrigerating cycle, 21...Control unit, 23...Storage unit.
Claims (1)
有し、かつ凝縮器と蒸発器との間にモータで駆動
される電動式膨張弁を設けて構成された冷凍サイ
クルと、前記圧縮機に入力される電源周波数に応
じた膨張弁開度が記憶される揮発性の記憶部と、
この記憶部に記憶された膨張弁開度にしたがつて
前記電動式膨張弁の開度を制御する手段と、前記
冷凍サイクルの運転の電源入力時に前記電動式膨
張弁の開度を弁開度の基準となる全開位置に調整
する手段と、この全開位置での開度を基準に前記
電動式膨張弁の前記冷凍サイクルの運転起動時に
おける開度を前記記憶部に入力される膨張弁開度
に応じて定める手段とを具備したことを特徴とす
る冷凍サイクル装置。 A refrigeration cycle has a compressor whose capacity can be varied by changing the power frequency, and an electric expansion valve driven by a motor is provided between a condenser and an evaporator, and an input to the compressor. a volatile memory section that stores an expansion valve opening degree according to a power supply frequency;
means for controlling the opening degree of the electric expansion valve according to the expansion valve opening degree stored in the storage unit; means for adjusting the opening to a fully open position as a reference; and an expansion valve opening that is input into the storage unit as the opening of the electric expansion valve at the time of starting operation of the refrigeration cycle based on the opening at the fully open position. A refrigeration cycle device characterized by comprising means determined according to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14886482U JPS5952359U (en) | 1982-09-30 | 1982-09-30 | Refrigeration cycle equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14886482U JPS5952359U (en) | 1982-09-30 | 1982-09-30 | Refrigeration cycle equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5952359U JPS5952359U (en) | 1984-04-06 |
| JPH0325093Y2 true JPH0325093Y2 (en) | 1991-05-31 |
Family
ID=30330613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14886482U Granted JPS5952359U (en) | 1982-09-30 | 1982-09-30 | Refrigeration cycle equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5952359U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0612199B2 (en) * | 1984-10-12 | 1994-02-16 | 松下電器産業株式会社 | Expansion valve control device for air conditioner |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5228047A (en) * | 1975-08-28 | 1977-03-02 | Matsushita Electric Ind Co Ltd | Refrigerator control device |
| JPS5642776A (en) * | 1979-09-18 | 1981-04-21 | Matsushita Electric Ind Co Ltd | Electric expansion valve |
| JPS5644567A (en) * | 1979-09-19 | 1981-04-23 | Matsushita Electric Ind Co Ltd | Refrigerant flow rate controller |
| JPS5712276A (en) * | 1980-06-25 | 1982-01-22 | Diesel Kiki Co | Controller for cooling cycle |
| JPS57127755A (en) * | 1981-01-29 | 1982-08-09 | Nippon Denso Co | Cooling capacity controller for car air conditioner |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6130127Y2 (en) * | 1979-11-09 | 1986-09-04 |
-
1982
- 1982-09-30 JP JP14886482U patent/JPS5952359U/en active Granted
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5228047A (en) * | 1975-08-28 | 1977-03-02 | Matsushita Electric Ind Co Ltd | Refrigerator control device |
| JPS5642776A (en) * | 1979-09-18 | 1981-04-21 | Matsushita Electric Ind Co Ltd | Electric expansion valve |
| JPS5644567A (en) * | 1979-09-19 | 1981-04-23 | Matsushita Electric Ind Co Ltd | Refrigerant flow rate controller |
| JPS5712276A (en) * | 1980-06-25 | 1982-01-22 | Diesel Kiki Co | Controller for cooling cycle |
| JPS57127755A (en) * | 1981-01-29 | 1982-08-09 | Nippon Denso Co | Cooling capacity controller for car air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5952359U (en) | 1984-04-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4724680A (en) | Air conditioning apparatus and control method thereof | |
| JPS6152560A (en) | Air conditioner | |
| GB2305744A (en) | Valve controller | |
| US4604872A (en) | Heat pump type air conditioning apparatus having a controlled variable capacity compressor | |
| JPH0325093Y2 (en) | ||
| JPH0668410B2 (en) | Air conditioner | |
| JP2697282B2 (en) | Air conditioner | |
| JP2003185219A (en) | Air conditioner | |
| JPH0473052B2 (en) | ||
| JPS6080046A (en) | Air-conditioning device | |
| JPH04174B2 (en) | ||
| JPH02264171A (en) | Operation control device for air conditioner | |
| JPH01314868A (en) | Heat pump type heater-cooler | |
| JPS6230687Y2 (en) | ||
| JPS61231378A (en) | Method of operating cryogenic warehouse | |
| JPH0113977Y2 (en) | ||
| JPH0236019Y2 (en) | ||
| JPH0354274B2 (en) | ||
| JPH0343569Y2 (en) | ||
| JPH0120625Y2 (en) | ||
| JPH0481707B2 (en) | ||
| JPH01208667A (en) | Multi-type air conditioner | |
| JPH01219451A (en) | Control of electrically driven expansion valve of air conditioner | |
| JPH0730940B2 (en) | Air conditioner | |
| JPH025318Y2 (en) |