JP3239804B2 - Refrigeration equipment for refrigeration containers - Google Patents
Refrigeration equipment for refrigeration containersInfo
- Publication number
- JP3239804B2 JP3239804B2 JP18133997A JP18133997A JP3239804B2 JP 3239804 B2 JP3239804 B2 JP 3239804B2 JP 18133997 A JP18133997 A JP 18133997A JP 18133997 A JP18133997 A JP 18133997A JP 3239804 B2 JP3239804 B2 JP 3239804B2
- Authority
- JP
- Japan
- Prior art keywords
- expansion valve
- opening
- electronic expansion
- supply current
- refrigeration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Devices That Are Associated With Refrigeration Equipment (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本願発明は、冷凍コンテナ用
冷凍装置に関するものであるBACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerating apparatus for a refrigerating container.
【０００２】[0002]
【従来の技術】一般に、冷凍コンテナ用冷凍装置は、圧
縮機、凝縮器、レシーバ、電子膨張弁および蒸発器を順
次接続してなる冷媒回路を備えて構成されており、圧縮
機から吐出されたガス冷媒を凝縮器において凝縮液化
し、電子膨張弁で減圧した後蒸発器において蒸発気化さ
せ、その際庫内空気を冷却して冷凍用に供することとな
っている。2. Description of the Related Art Generally, a refrigerating apparatus for a refrigerating container is provided with a refrigerant circuit in which a compressor, a condenser, a receiver, an electronic expansion valve, and an evaporator are sequentially connected, and is discharged from the compressor. The gas refrigerant is condensed and liquefied in a condenser, decompressed by an electronic expansion valve, and then evaporated and vaporized in an evaporator. At that time, the air in the refrigerator is cooled and provided for freezing.
【０００３】[0003]
【発明が解決しようとする課題】上記構成の冷凍コンテ
ナ用冷凍装置の場合、保管物の種類によって庫内温度が
０℃〜２５℃のチルドモードによる運転、０℃以下の冷
凍モードによる運転が実行される。In the refrigeration apparatus for a refrigeration container having the above-described structure, the operation in the chilled mode in which the temperature in the refrigerator is 0 ° C. to 25 ° C. and the operation in the refrigeration mode in which the temperature is 0 ° C. or less are executed depending on the type of the storage object. Is done.
【０００４】一方、蒸発器からの吹出空気の温度分布を
均一化することが庫内温度を均一化かる上で重要であ
る。On the other hand, it is important to make the temperature distribution of the air blown out from the evaporator uniform, in order to make the temperature in the refrigerator uniform.
【０００５】上記チルドモードにおいて吹出空気の温度
分布を均一化する方法としては、冷凍装置を循環する冷
媒量を多くし、蒸発温度を上げる方法があるが、この場
合、冷媒循環量の増大に伴って冷凍装置全体としての負
荷が大きくなるため、供給電流を遮断するブレーカが作
動してしまうおそれがある。そこで、従来は圧縮機のア
ンロードを行うことにより負荷軽減を図るようにしてい
たが、吹出温度の均一化を図る上で最適な冷媒循環量を
得ることが難しかった。As a method of making the temperature distribution of the blown air uniform in the chilled mode, there is a method of increasing the amount of refrigerant circulating in the refrigerating apparatus and increasing the evaporation temperature. As a result, the load of the entire refrigeration apparatus becomes large, and there is a possibility that a breaker that cuts off the supply current may operate. Therefore, in the past, the load was reduced by unloading the compressor, but it was difficult to obtain an optimum refrigerant circulation amount in order to make the blowing temperature uniform.
【０００６】本願発明は、上記の点に鑑みてなされたも
ので、チルドモードにおける吹出空気の温度分布を均一
化するに十分な最大冷媒循環量を確保できるようにする
ことを目的とするものである。The present invention has been made in view of the above points, and has as its object to secure a maximum refrigerant circulation amount sufficient to make the temperature distribution of blown air uniform in a chilled mode. is there.
【０００７】[0007]
【課題を解決するための手段】本願発明の基本構成（請
求項１の発明）では、上記課題を解決するための手段と
して、圧縮機１、凝縮器２、レシーバ３、電子膨張弁４
および蒸発器５を順次接続してなる冷媒回路を備えた冷
凍コンテナ用冷凍装置において、チルドモードでの運転
中においては前記電子膨張弁４の開度を最大開度に設定
する膨張弁開度設定手段と、前記冷凍装置への供給電流
Ｉを検出する供給電流検出手段２０とを付設するととも
に、前記膨張弁開度設定手段を、前記供給電流検出手段
２０による検出電流Ｉが上下限設定値Ｉｓｈ，Ｉｓｌの
間となるように前記電子膨張弁４の開度を設定するもの
としている。In the basic configuration of the present invention (the invention of claim 1), as means for solving the above-mentioned problems, a compressor 1, a condenser 2, a receiver 3, and an electronic expansion valve 4 are provided.
And a refrigerating device for a refrigeration container provided with a refrigerant circuit in which the evaporator 5 is sequentially connected. During the operation in the chilled mode, the opening of the electronic expansion valve 4 is set to the maximum opening. Means and a supply current detecting means 20 for detecting a supply current I to the refrigeration apparatus, and the expansion valve opening degree setting means is connected to an upper and lower limit setting value Ish which is detected by the supply current detection means 20. , Isl, the opening of the electronic expansion valve 4 is set.
【０００８】上記のように構成したことにより、チルド
モードでの運転中においては電子膨張弁４が最大開度に
設定されるため、冷媒循環量を最大に確保できることと
なる。従って、蒸発器５における冷媒偏流が抑制される
こととなり、蒸発器５からの吹出空気の温度分布を均一
化することができるとともに、供給電流Ｉの許容量に対
応した電子膨張弁４の開度設定が行えることとなり、そ
の状態での最大冷媒循環量を確保できることとなる。With the above configuration, the electronic expansion valve 4 is set to the maximum opening during operation in the chilled mode, so that the refrigerant circulation amount can be secured to the maximum. Therefore, the refrigerant drift in the evaporator 5 is suppressed, the temperature distribution of the air blown out from the evaporator 5 can be made uniform, and the opening degree of the electronic expansion valve 4 corresponding to the allowable amount of the supply current I Setting can be performed, and the maximum refrigerant circulation amount in that state can be secured.
【０００９】この場合において、請求項２の発明におけ
るように、前記供給電流検出手段２０による検出電流Ｉ
が前記上限設定値Ｉｓｈを超えた場合には、前記電子膨
張弁４の開度を前記膨張弁開度設定手段による設定開度
から所定の絞り量だけ絞る一方、前記供給電流検出手段
２０による検出電流Ｉが前記下限設定値Ｉｓｌ未満とな
った場合には、前記電子膨張弁４の開度を前記膨張弁開
度設定手段による設定開度から前記絞り量より大きな開
き量だけ開くようにした場合、供給電流Ｉの最大許容量
に対応した（即ち、上限設定値Ｉｓｈに近い状態での）
電子膨張弁４の開度設定が行える。In this case, the current I detected by the supply current detecting means 20 is equal to the current I.
Exceeds the upper limit set value Ish, the opening of the electronic expansion valve 4 is reduced by a predetermined throttle amount from the opening set by the expansion valve opening setting means, while the opening of the electronic expansion valve 4 is detected by the supply current detecting means 20. When the current I is less than the lower limit set value Isl, the opening of the electronic expansion valve 4 is opened from the opening set by the expansion valve opening setting means by an opening larger than the throttle amount. Corresponding to the maximum allowable amount of the supply current I (that is, in a state close to the upper limit set value Ish).
The opening of the electronic expansion valve 4 can be set.
【００１０】請求項３の発明におけるように、前記圧縮
機１の吐出圧力Ｐｈを検出する高圧圧力検出手段１９
と、該高圧圧力検出手段１９による検出圧力Ｐｈが設定
値Ｐｈ0を超えた場合には前記膨張弁開度設定手段の作
動を禁止する禁止手段とを付設した場合、電子膨張弁４
の開き過ぎに起因して圧縮機１の吐出圧力Ｐｈが高くな
り過ぎ、保護装置が作動してしまうということがなくな
る。As in the third aspect of the present invention, a high pressure detecting means 19 for detecting a discharge pressure Ph of the compressor 1 is provided.
And a prohibiting means for prohibiting the operation of the expansion valve opening setting means when the pressure Ph detected by the high pressure detection means 19 exceeds the set value Ph 0.
The discharge pressure Ph of the compressor 1 due to excessive opening of the compressor 1 does not become too high, and the protection device does not operate.
【００１１】請求項４の発明におけるように、前記圧縮
機１からの吐出ガス冷媒を前記蒸発器５の入口側にバイ
パスさせるバイパス回路１１と、前記吐出ガス冷媒を前
記凝縮器２および前記バイパス回路１１へ比例分配する
比例弁１３と、該比例弁１３による吐出ガス冷媒の前記
バイパス回路１１側への分配が所定値を超えた場合には
前記膨張弁開度設定手段の作動を禁止する禁止手段とを
付設した場合、吐出ガス冷媒のバイパス量が増え過ぎて
電子膨張弁４の開度設定制御が難しくなるということが
なくなる。As in the invention of claim 4, a bypass circuit 11 for bypassing the gas refrigerant discharged from the compressor 1 to the inlet side of the evaporator 5, a condenser circuit 2 for passing the discharged gas refrigerant to the condenser 2 and the bypass circuit And a prohibiting means for prohibiting the operation of the expansion valve opening setting means when the distribution of the discharge gas refrigerant to the bypass circuit 11 side by the proportional valve 13 exceeds a predetermined value. In this case, it is possible to prevent the bypass amount of the discharged gas refrigerant from being excessively increased and the opening degree control of the electronic expansion valve 4 from becoming difficult.
【００１２】[0012]
【発明の実施の形態】以下、添付の図面を参照して、本
願発明の好適な実施の形態について詳述する。Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
【００１３】この冷凍コンテナ用冷凍装置は、図１に示
すように、圧縮機１、凝縮器２、レシーバ３、電子膨張
弁４および蒸発器５を順次接続してなる冷媒回路を備
え、前記レシーバ３から導かれる液冷媒と前記蒸発器５
から導かれるガス冷媒とを熱交換させて前記液冷媒に過
冷却を付与する過冷却用熱交換器６を付設して構成され
ている。符号７は凝縮器２を冷却するための庫外ファ
ン、８は蒸発器３に庫内空気を供給するための庫内ファ
ンである。As shown in FIG. 1, the refrigerating apparatus for a refrigerating container includes a refrigerant circuit in which a compressor 1, a condenser 2, a receiver 3, an electronic expansion valve 4, and an evaporator 5 are sequentially connected. 3 and the evaporator 5
A supercooling heat exchanger 6 for exchanging heat with a gas refrigerant guided from the apparatus to provide supercooling to the liquid refrigerant is provided. Reference numeral 7 denotes an external fan for cooling the condenser 2, and reference numeral 8 denotes an internal fan for supplying internal air to the evaporator 3.
【００１４】前記冷媒回路には、前記レシーバ３から導
かれる液冷媒の一部を前記圧縮機１の吸入側にインジェ
クションするリキッドインジェクション回路９が付設さ
れている。符号１０はリキッドインジェクション時に開
作動される開閉弁として作用する電磁開閉弁である。The refrigerant circuit is provided with a liquid injection circuit 9 for injecting a part of the liquid refrigerant guided from the receiver 3 into the suction side of the compressor 1. Reference numeral 10 denotes an electromagnetic on-off valve that operates as an on-off valve that is opened at the time of liquid injection.
【００１５】また、前記冷媒回路には、前記圧縮機１か
らの吐出ガス冷媒の一部を該凝縮器２、前記レシーバ３
および前記電子膨張弁４を側路するとともにドレンパン
ヒータ１２を経て前記蒸発器５の入口側に導くバイパス
回路１１と、該バイパス回路１１と前記凝縮器２側とに
ガス冷媒を比例分配する比例弁１３と、前記吐出ガス冷
媒を前記ドレンパンヒータ１２を側路して前記蒸発器５
の入口側へ供給するための三方弁１４とが付設されてい
る。In the refrigerant circuit, a part of the refrigerant gas discharged from the compressor 1 is supplied to the condenser 2 and the receiver 3.
A bypass circuit 11 for bypassing the electronic expansion valve 4 and leading to the inlet side of the evaporator 5 through a drain pan heater 12; and a proportional valve for proportionally distributing gas refrigerant to the bypass circuit 11 and the condenser 2 side. 13 and the discharge gas refrigerant is passed through the drain pan heater 12 to the evaporator 5.
And a three-way valve 14 for supplying the gas to the inlet side.
【００１６】また、この冷凍コンテナ用冷凍装置には、
前記蒸発器５の吸込空気温度Ｔｒを検出する庫内温度検
出手段として作用する温度センサー１５と、前記蒸発器
５の吹出空気温度Ｔｓを検出する吹出温度検出手段とし
て作用する温度センサー１６と、前記蒸発器５の入口冷
媒温度Ｔｉを検出する入口冷媒温度検出手段として作用
する温度センサー１７と、前記蒸発器５の出口冷媒温度
Ｔｏを検出する出口冷媒温度検出手段として作用する温
度センサー１８と、前記圧縮機１の吐出圧力（換言すれ
ば、高圧圧力）Ｐｈを検出する高圧圧力検出手段として
作用する圧力センサー１９と、冷凍装置への供給電流Ｉ
を検出する供給電流検出手段として作用する電流検知器
２０とが付設されている。The refrigeration apparatus for a refrigeration container includes:
A temperature sensor 15 acting as an internal temperature detecting means for detecting the intake air temperature Tr of the evaporator 5, a temperature sensor 16 acting as an outlet temperature detecting means for detecting the outlet air temperature Ts of the evaporator 5, A temperature sensor 17 acting as an inlet refrigerant temperature detecting means for detecting an inlet refrigerant temperature Ti of the evaporator 5, a temperature sensor 18 acting as an outlet refrigerant temperature detecting means for detecting an outlet refrigerant temperature To of the evaporator 5, A pressure sensor 19 serving as a high pressure detecting means for detecting a discharge pressure Ph (in other words, a high pressure) of the compressor 1;
And a current detector 20 acting as supply current detecting means for detecting the current.
【００１７】そして、前記温度センサー１５〜１８によ
り検出された吸込空気温度Ｔｒ、吹出空気温度Ｔｓ、入
口冷媒温度Ｔｉおよび出口冷媒温度Ｔｏ、前記圧力セン
サー１９により検出された高圧圧力Ｐｈ、前記電流検知
器２０により検出された供給電流Ｉは、コントローラ２
１に入力され、該コントローラ２１は、前記各情報に基
づいて各種演算処理を行い、その結果を制御信号として
圧縮機１、庫外ファン７、庫内ファン８、電子膨張弁
４、比例弁１３および三方弁１４へ出力することとなっ
ている。The suction air temperature Tr detected by the temperature sensors 15 to 18, the blown air temperature Ts, the inlet refrigerant temperature Ti and the outlet refrigerant temperature To, the high pressure Ph detected by the pressure sensor 19, and the current detection The supply current I detected by the device 20 is
1, the controller 21 performs various arithmetic processes based on the information, and uses the results as control signals as the compressor 1, the outside fan 7, the inside fan 8, the electronic expansion valve 4, the proportional valve 13 And the three-way valve 14.
【００１８】つまり、前記コントローラ２１は、圧縮機
１の運転制御、庫外ファン７および庫内ファン８の運転
制御、電子膨張弁４の過熱度制御を行うとともに、チル
ドモードでの運転中においては前記電子膨張弁４の開度
を最大開度に設定する膨張弁開度設定手段としての機能
を有しているのである。該膨張弁開度設定手段は、具体
的には、前記電流検知器２０による検出電流Ｉが上下限
設定値Ｉｓｈ，Ｉｓｌの間となるように前記電子膨張弁
４の開度を設定するものとされている。That is, the controller 21 controls the operation of the compressor 1, controls the operation of the external fan 7 and the internal fan 8, controls the degree of superheat of the electronic expansion valve 4, and operates during the chilled mode. The electronic expansion valve 4 has a function as expansion valve opening setting means for setting the opening of the electronic expansion valve 4 to the maximum opening. Specifically, the expansion valve opening setting means sets the opening of the electronic expansion valve 4 such that the current I detected by the current detector 20 is between the upper and lower limit set values Ish and Isl. Have been.
【００１９】ついで、図２に示すフローチャートを参照
して、本実施の形態にかかる冷凍コンテナ用冷凍装置に
おける冷媒循環量制御について詳述する。Next, with reference to a flow chart shown in FIG. 2, the refrigerant circulation amount control in the refrigeration apparatus for a refrigeration container according to the present embodiment will be described in detail.
【００２０】ステップＳ1において温度センサー１５〜
１８からの温度情報（Ｔｒ，Ｔｓ，Ｔｉ，Ｔｏ）、圧力
センサー１９からの圧力情報（Ｐｈ）および電流検知器
２０からの電流情報（Ｉ）が入力され、ステップＳ2に
おいてチルドモードによる運転が否かの判定がなされ
る。ここで、肯定判定されると、ステップＳ3において
三方弁１４がＯＮされ（即ち、吐出ガス冷媒がドレンパ
ンヒータ１２をバイパスして蒸発器５の入口側へ供給さ
れ）、電子膨張弁４の開度ＥＶが初期値に設定され、比
例弁１３が吹出空気温度Ｔｓにより制御される。[0020] The temperature sensor 15 in step S 1
Temperature information from the 18 (Tr, Ts, Ti, To), pressure information (Ph) and the current information from the current detector 20 (I) is inputted from the pressure sensor 19, is operated by chilled mode in step S 2 A determination is made as to whether or not it is. Here, if an affirmative determination, the three-way valve 14 is ON in step S 3 (i.e., the discharge gas refrigerant is supplied to the inlet side of the evaporator 5 to bypass the drain pan heater 12), the opening of the electronic expansion valve 4 The degree EV is set to the initial value, and the proportional valve 13 is controlled by the blown air temperature Ts.
【００２１】ついで、ステップＳ4において圧縮機１の
吐出圧力（即ち、高圧圧力）Ｐｈと設定値（即ち、許容
最大値）Ｐｈ0との比較が行われ、ここでＰｈ≦Ｐｈ0と
判定されると、ステップＳ5に進み、供給電流Ｉと上限
設定値Ｉｓｈとの比較がなされ、ここでＩ＞Ｉｓｈと判
定された場合には、ステップＳ6において電子膨張弁４
の開度ＥＶが１パルス／秒で絞られる。つまり、供給電
流Ｉが増大し過ぎると、冷媒循環量が減少され、負荷の
増大によるブレーカの作動が防止されることとなるので
ある。なお、ステップＳ4においてＰｈ＞Ｐｈ0と判定さ
れた場合には、直接ステップＳ6に進み、電子膨張弁４
の開度ＥＶが１パルス／秒で絞られる。このようにする
と、電子膨張弁４の開き過ぎに起因して圧縮機１の吐出
圧力Ｐｈが高くなり過ぎ、保護装置が作動してしまうと
いうことがなくなる。つまり、膨張弁設定手段による開
度設定が禁止されることとなるのである。[0021] Then, the discharge pressure of the compressor 1 (i.e., high pressure) in step S 4 Ph and the set value (i.e., the allowable maximum value) is performed compared with Ph 0, where it is determined that the Ph ≦ Ph 0 that when, the process proceeds to step S 5, a comparison of the supply current I and the upper limit set value Ish is performed, wherein when it is determined that I> Ish, the electronic expansion valve 4 in step S 6
Is narrowed at 1 pulse / sec. That is, if the supply current I increases too much, the amount of circulating refrigerant is reduced, and the operation of the breaker due to an increase in load is prevented. Incidentally, when it is determined that Ph> Ph 0 in step S 4, the flow directly advances to step S 6, the electronic expansion valve 4
Is narrowed at 1 pulse / sec. This prevents the discharge pressure Ph of the compressor 1 from becoming too high due to the electronic expansion valve 4 being opened too much, so that the protection device does not operate. That is, the setting of the opening degree by the expansion valve setting means is prohibited.
【００２２】ステップＳ5においてＩ≦Ｉｓｈと判定さ
れた場合には、ステップＳ7に進み、供給電流Ｉと下限
設定値Ｉｓｌとの比較がなされ、ここでＩ＜Ｉｓｌと判
定された場合には、ステップＳ8において電子膨張弁４
の開度ＥＶが２パルス／秒で開かれる。つまり、供給電
流Ｉが減少し過ぎると、冷媒循環量が増大され、最大冷
媒循環量に近づけられるのである。しかも、Ｉ＜Ｉｓｌ
と判定された場合における電子膨張弁４の開度ＥＶの開
き度をＩ＞Ｉｓｈと判定された場合における電子膨張弁
４の開度ＥＶの絞り度より大きく（本実施の形態におい
ては、２倍）したことにより、電子膨張弁４の開度ＥＶ
を上限設定値Ｉｓｈにおいて許容される開度に近づける
ことができることとなり、供給電流Ｉの最大許容量に対
応した電子膨張弁４の開度が得られることとなる。従っ
て、冷媒循環量を供給電流Ｉの許容範囲において最大と
することができる。[0022] If it is determined that I ≦ Ish at step S 5, the process proceeds to step S 7, the comparison of the supply current I and the lower limit set value Isl is performed, wherein when it is determined that I <Isl is , electronic expansion valve 4 in step S 8
Is opened at 2 pulses / sec. In other words, if the supply current I decreases too much, the amount of circulating refrigerant is increased, and approaches the maximum amount of circulating refrigerant. Moreover, I <Isl
Is larger than the throttle degree of the opening EV of the electronic expansion valve 4 when it is determined that I> Ish (in this embodiment, it is twice as large). ), The opening EV of the electronic expansion valve 4
Can be made closer to the opening allowed by the upper limit set value Ish, and the opening of the electronic expansion valve 4 corresponding to the maximum allowable amount of the supply current I can be obtained. Therefore, the refrigerant circulation amount can be maximized within the allowable range of the supply current I.
【００２３】そして、ステップＳ9において比例弁１３
による吐出ガス冷媒のバイパス量（換言すれば、比例分
配量ＭＶ）が所定値を超えたと判定された場合（例え
ば、吐出ガス冷媒の９０％を超えた量がバイパスしたと
判定された場合）には、ステップＳ6に戻り、電子膨張
弁４の開度ＥＶが１パルス／秒で絞られる。このように
すると、吐出ガス冷媒のバイパス量が増え過ぎて電子膨
張弁４の開度設定制御が難しくなるということがなくな
る。なお、ステップＳ7においてはＩ≧Ｉｓｌと判定さ
れた場合には、ステップＳ9に直接進み、比例分配量Ｍ
Ｖの監視が行われる。つまり、膨張弁設定手段による開
度設定が禁止されることとなるのである。また、ステッ
プＳ9においてＭＶ≦９０％と判定された場合には、電
子膨張弁４の開き度を変えることなく、ステップＳ1へ
リターンする。[0023] Then, the proportional valve in step S 9 13
If the bypass amount of the discharged gas refrigerant (in other words, the proportional distribution amount MV) is determined to exceed a predetermined value (for example, if it is determined that the amount exceeding 90% of the discharged gas refrigerant has bypassed), returns to step S 6, the opening degree EV of the electronic expansion valve 4 is throttled by 1 pulse / sec. In this case, it is possible to prevent the bypass amount of the discharged gas refrigerant from being excessively increased and the opening degree setting control of the electronic expansion valve 4 from becoming difficult. Note that in the case where it is determined that I ≧ Isl is step S 7, the process proceeds directly to step S 9, the proportional volume of distribution M
V is monitored. That is, the setting of the opening degree by the expansion valve setting means is prohibited. Further, when it is determined that the MV ≦ 90% in step S 9, without changing the opening degree of the electronic expansion valve 4, the process returns to step S 1.
【００２４】上記したように、本実施の形態において
は、チルドモードでの運転時においては、電子膨張弁４
の開度を供給電流Ｉの許容範囲の上限での最大開度とす
ることができることとなり、冷媒循環量を最大とするこ
とができる。従って、蒸発器５における冷媒偏流が抑制
されることとなり、蒸発器５の吹出空気の温度分布を均
一化することができる。As described above, in the present embodiment, during operation in the chilled mode, the electronic expansion valve 4
Can be the maximum opening at the upper limit of the allowable range of the supply current I, and the refrigerant circulation amount can be maximized. Therefore, refrigerant drift in the evaporator 5 is suppressed, and the temperature distribution of the air blown out from the evaporator 5 can be made uniform.
【００２５】[0025]
【発明の効果】本願発明（請求項１の発明）によれば、
圧縮機１、凝縮器２、電子膨張弁４および蒸発器５を順
次接続してなる冷媒回路を備えた冷凍コンテナ用冷凍装
置において、チルドモードでの運転中においては前記電
子膨張弁４の開度を最大開度に設定する膨張弁開度設定
手段と、前記冷凍装置への供給電流Ｉを検出する供給電
流検出手段２０とを付設するとともに、前記膨張弁開度
設定手段を、前記供給電流検出手段２０による検出電流
Ｉが上下限設定値Ｉｓｈ，Ｉｓｌの間となるように前記
電子膨張弁４の開度を設定するものとして、チルドモー
ドでの運転中においては電子膨張弁４が最大開度に設定
されるとともに、供給電流Ｉの許容量に対応した電子膨
張弁４の開度設定が行えるようにしたので、冷媒循環量
を最大に確保でき、蒸発器５における冷媒偏流が抑制さ
れることとなり、蒸発器５からの吹出空気の温度分布を
均一化することができるとともに、その状態での最大冷
媒循環量を確保できるという優れた効果がある。According to the invention of the present application (the invention of claim 1),
In a refrigeration apparatus for a refrigeration container provided with a refrigerant circuit in which a compressor 1, a condenser 2, an electronic expansion valve 4, and an evaporator 5 are sequentially connected, the opening degree of the electronic expansion valve 4 during operation in a chilled mode. And a supply current detecting means 20 for detecting a supply current I to the refrigerating apparatus, and the expansion valve opening setting means is provided with the supply current detection. The opening of the electronic expansion valve 4 is set so that the current I detected by the means 20 is between the upper and lower limit set values Ish and Isl. And the opening degree of the electronic expansion valve 4 can be set in accordance with the allowable amount of the supply current I, so that the refrigerant circulation amount can be maximized, and the refrigerant drift in the evaporator 5 is suppressed. Becomes It is possible to uniform the temperature distribution of air blown from Hatsuki 5, there is excellent effect that can ensure maximum refrigerant circulation amount in this state.
【００２６】この場合において、請求項２の発明におけ
るように、前記供給電流検出手段２０による検出電流Ｉ
が前記上限設定値Ｉｓｈを超えた場合には、前記電子膨
張弁４の開度を前記膨張弁開度設定手段による設定開度
から所定の絞り量だけ絞る一方、前記供給電流検出手段
２０による検出電流Ｉが前記下限設定値Ｉｓｌ未満とな
った場合には、前記電子膨張弁４の開度を前記膨張弁開
度設定手段による設定開度から前記絞り量より大きな開
き量だけ開くようにした場合、供給電流Ｉの最大許容量
に対応した（即ち、上限設定値Ｉｓｈに近い状態での）
電子膨張弁４の開度設定が行える。In this case, as in the second aspect of the present invention, the current I
Exceeds the upper limit set value Ish, the opening of the electronic expansion valve 4 is reduced by a predetermined throttle amount from the opening set by the expansion valve opening setting means, while the opening of the electronic expansion valve 4 is detected by the supply current detecting means 20. When the current I is less than the lower limit set value Isl, the opening of the electronic expansion valve 4 is opened from the opening set by the expansion valve opening setting means by an opening larger than the throttle amount. Corresponding to the maximum allowable amount of the supply current I (that is, in a state close to the upper limit set value Ish).
The opening of the electronic expansion valve 4 can be set.
【００２７】請求項３の発明におけるように、前記圧縮
機１の吐出圧力Ｐｈを検出する高圧圧力検出手段１９
と、該高圧圧力検出手段１９による検出圧力Ｐｈが設定
値Ｐｈ0を超えた場合には前記膨張弁開度設定手段の作
動を禁止する禁止手段とを付設した場合、電子膨張弁４
の開き過ぎに起因して圧縮機１の吐出圧力Ｐｈが高くな
り過ぎ、保護装置が作動してしまうということがなくな
る。As in the third aspect of the present invention, the high pressure detecting means 19 for detecting the discharge pressure Ph of the compressor 1 is provided.
And a prohibiting means for prohibiting the operation of the expansion valve opening setting means when the pressure Ph detected by the high pressure detection means 19 exceeds the set value Ph 0.
The discharge pressure Ph of the compressor 1 due to excessive opening of the compressor 1 does not become too high, and the protection device does not operate.
【００２８】請求項４の発明におけるように、前記圧縮
機１からの吐出ガス冷媒を前記蒸発器５の入口側にバイ
パスさせるバイパス回路１１と、前記吐出ガス冷媒を前
記凝縮器２および前記バイパス回路１１へ比例分配する
比例弁１３と、該比例弁１３による吐出ガス冷媒の前記
バイパス回路１１側への分配が所定値を超えた場合には
前記膨張弁開度設定手段の作動を禁止する禁止手段とを
付設した場合、吐出ガス冷媒のバイパス量が増え過ぎて
電子膨張弁４の開度設定制御が難しくなるということが
なくなる。A bypass circuit 11 for bypassing the gas refrigerant discharged from the compressor 1 to the inlet side of the evaporator 5 as in the invention of claim 4, and a condenser 2 and the bypass circuit for passing the discharged gas refrigerant to the condenser 2 And a prohibiting means for prohibiting the operation of the expansion valve opening setting means when the distribution of the discharge gas refrigerant to the bypass circuit 11 side by the proportional valve 13 exceeds a predetermined value. In this case, it is possible to prevent the bypass amount of the discharged gas refrigerant from being excessively increased and the opening degree control of the electronic expansion valve 4 from becoming difficult.
【図１】本願発明の実施の形態にかかる冷凍コンテナ用
冷凍装置の冷媒回路図である。FIG. 1 is a refrigerant circuit diagram of a refrigeration container refrigeration apparatus according to an embodiment of the present invention.
【図２】本願発明の実施の形態にかかる冷凍コンテナ用
冷凍装置における冷媒循環量制御を説明するフローチャ
ートである。FIG. 2 is a flowchart illustrating a refrigerant circulation amount control in the refrigeration container refrigeration apparatus according to the embodiment of the present invention.
１は圧縮機、２は凝縮器、３はレシーバ、４は電子膨張
弁、５は蒸発器、１３は比例弁、１４は三方弁、１９は
高圧圧力検出手段（圧力センサー）、２０は供給電流検
出手段（電流検知器）、２１はコントローラ、Ｐｈは高
圧圧力、Ｉは供給電流。1 is a compressor, 2 is a condenser, 3 is a receiver, 4 is an electronic expansion valve, 5 is an evaporator, 13 is a proportional valve, 14 is a three-way valve, 19 is a high pressure detection means (pressure sensor), and 20 is a supply current. Detecting means (current detector), 21 is a controller, Ph is high pressure, I is supply current.
Claims (4)
（３）、電子膨張弁（４）および蒸発器（５）を順次接
続してなる冷媒回路を備えた冷凍コンテナ用冷凍装置で
あって、チルドモードでの運転中においては前記電子膨
張弁（４）の開度を最大開度に設定する膨張弁開度設定
手段と、前記冷凍装置への供給電流（Ｉ）を検出する供
給電流検出手段（２０）とを付設するとともに、前記膨
張弁開度設定手段を、前記供給電流検出手段（２０）に
よる検出電流（Ｉ）が上下限設定値（Ｉｓｈ），（Ｉｓ
ｌ）の間となるように前記電子膨張弁（４）の開度を設
定するものとしたことを特徴とする冷凍コンテナ用冷凍
装置。1. A refrigerating apparatus for a refrigerating container comprising a refrigerant circuit in which a compressor (1), a condenser (2), a receiver (3), an electronic expansion valve (4) and an evaporator (5) are sequentially connected. In operation in the chilled mode, an expansion valve opening setting means for setting the opening of the electronic expansion valve (4) to a maximum opening, and a supply current (I) to the refrigerating device are detected. Offering
A supply current detecting means (20);
The expansion valve opening setting means is connected to the supply current detecting means (20).
The detected current (I) is determined by the upper and lower limit set values (Ish), (Is
l) The opening of the electronic expansion valve (4) is set so that
A refrigeration apparatus for a refrigeration container, characterized in that:
出電流（Ｉ）が前記上限設定値（Ｉｓｈ）を超えた場合
には、前記電子膨張弁（４）の開度を前記膨張弁開度設
定手段による設定開度から所定の絞り量だけ絞る一方、
前記供給電流検出手段（２０）による検出電流（Ｉ）が
前記下限設定値（Ｉｓｌ）未満となった場合には、前記
電子膨張弁（４）の開度を前記膨張弁開度設定手段によ
る設定開度から前記絞り量より大きな開き量だけ開くよ
うにしたことを特徴とする前記請求項１記載の冷凍コン
テナ用冷凍装置。2. When the detection current (I) detected by the supply current detection means (20) exceeds the upper limit set value (Ish), the opening of the electronic expansion valve (4) is changed to the expansion valve opening. While the aperture is reduced by a predetermined amount from the opening set by the setting means,
When the current (I) detected by the supply current detecting means (20) is smaller than the lower limit set value (Isl), the opening of the electronic expansion valve (4) is set by the expansion valve opening setting means. claim 1 refrigerated container refrigeration apparatus, wherein it has to open only in a large opening ratio than the aperture amount from said opening.
検出する高圧圧力検出手段（１９）と、該高圧圧力検出
手段（１９）による検出圧力（Ｐｈ）が設定値（Ｐ
ｈ0）を超えた場合には前記膨張弁開度設定手段の作動
を禁止する禁止手段とを付設したことを特徴とする前記
請求項１および請求項２のいずれか一項記載の冷凍コン
テナ用冷凍装置。3. A high pressure detection means (19) for detecting a discharge pressure (Ph) of the compressor (1), and a pressure (Ph) detected by the high pressure detection means (19) is set to a set value (P).
3. A refrigerating container according to claim 1, further comprising a prohibition means for prohibiting the operation of the expansion valve opening setting means when h 0 ) is exceeded. Refrigeration equipment.
前記蒸発器（５）の入口側にバイパスさせるバイパス回
路（１１）と、前記吐出ガス冷媒を前記凝縮器（２）お
よび前記バイパス回路（１１）へ比例分配する比例弁
（１３）と、該比例弁（１３）による吐出ガス冷媒の前
記バイパス回路（１１）側への分配が所定値を超えた場
合には前記膨張弁開度設定手段の作動を禁止する禁止手
段とを付設したことを特徴とする前記請求項１ないし請
求項３のいずれか一項記載の冷凍コンテナ用冷凍装置。4. A bypass circuit (11) for bypassing the gas refrigerant discharged from the compressor (1) to the inlet side of the evaporator (5), and a bypass circuit (11) for passing the discharged gas refrigerant to the condenser (2). A proportional valve (13) for proportionally distributing the refrigerant to the circuit (11), and the expansion valve opening when the distribution of the discharge gas refrigerant to the bypass circuit (11) side by the proportional valve (13) exceeds a predetermined value. The refrigeration apparatus for a refrigeration container according to any one of claims 1 to 3 , further comprising prohibition means for prohibiting operation of the setting means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18133997A JP3239804B2 (en) | 1997-07-07 | 1997-07-07 | Refrigeration equipment for refrigeration containers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18133997A JP3239804B2 (en) | 1997-07-07 | 1997-07-07 | Refrigeration equipment for refrigeration containers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1123073A JPH1123073A (en) | 1999-01-26 |
| JP3239804B2 true JP3239804B2 (en) | 2001-12-17 |
Family
ID=16098977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18133997A Expired - Fee Related JP3239804B2 (en) | 1997-07-07 | 1997-07-07 | Refrigeration equipment for refrigeration containers |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3239804B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008001525A1 (en) * | 2006-06-27 | 2008-01-03 | Yanmar Co., Ltd. | Refrigerated container |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009156544A (en) * | 2007-12-27 | 2009-07-16 | Calsonic Kansei Corp | Air conditioner and air-conditioning method |
| JP2010236712A (en) * | 2009-03-30 | 2010-10-21 | Daikin Ind Ltd | Refrigerating device |
-
1997
- 1997-07-07 JP JP18133997A patent/JP3239804B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008001525A1 (en) * | 2006-06-27 | 2008-01-03 | Yanmar Co., Ltd. | Refrigerated container |
| JP2008008517A (en) * | 2006-06-27 | 2008-01-17 | Yanmar Co Ltd | Refrigerating container |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1123073A (en) | 1999-01-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5904049A (en) | Refrigeration expansion control | |
| EP1146299B1 (en) | Integrated electronic refrigerant management system | |
| US6438978B1 (en) | Refrigeration system | |
| WO2007029803A1 (en) | Refrigeration device | |
| JP2000179960A (en) | Vapor compression type refrigeration cycle | |
| US6058728A (en) | Refrigerant cycle for vehicle air conditioner | |
| US20030145614A1 (en) | Refrigerating device | |
| JP3239804B2 (en) | Refrigeration equipment for refrigeration containers | |
| JPH11182946A (en) | Refrigerating device | |
| JP2007032895A (en) | Supercritical refrigerating cycle device and its control method | |
| JPH04251164A (en) | Freezing cycle device | |
| JPH04214158A (en) | Operation controller for refrigerating device | |
| JPH10339509A (en) | Freezer for freezing container | |
| JPH0534578B2 (en) | ||
| JP3735338B2 (en) | Refrigeration apparatus for vehicle and control method thereof | |
| JP2643671B2 (en) | Operation control device for refrigeration equipment | |
| JPH1123072A (en) | Freezer for freezer container | |
| JPH0682122A (en) | Refrigerating apparatus | |
| JP3107001B2 (en) | Refrigeration equipment for refrigeration containers | |
| JPH0156355B2 (en) | ||
| JP2002195726A (en) | Refrigerator | |
| KR940018623A (en) | Refrigerant cycle control device and method of air conditioner | |
| JPH0263152B2 (en) | ||
| JPH1137572A (en) | Freezer device of freezing container | |
| JPH0833242B2 (en) | Refrigeration equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081012 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081012 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091012 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091012 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101012 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111012 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111012 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121012 Year of fee payment: 11 |
|
| LAPS | Cancellation because of no payment of annual fees |