JPS6325457A - Refrigerator - Google Patents
RefrigeratorInfo
- Publication number
- JPS6325457A JPS6325457A JP16844786A JP16844786A JPS6325457A JP S6325457 A JPS6325457 A JP S6325457A JP 16844786 A JP16844786 A JP 16844786A JP 16844786 A JP16844786 A JP 16844786A JP S6325457 A JPS6325457 A JP S6325457A
- Authority
- JP
- Japan
- Prior art keywords
- compressors
- compressor
- controlled
- control
- capacity
- 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.)
- Granted
Links
- 238000005057 refrigeration Methods 0.000 claims description 38
- 238000001514 detection method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 7
- 230000007423 decrease Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/07—Details of compressors or related parts
- F25B2400/075—Details of compressors or related parts with parallel compressors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/07—Details of compressors or related parts
- F25B2400/075—Details of compressors or related parts with parallel compressors
- F25B2400/0751—Details of compressors or related parts with parallel compressors the compressors having different capacities
Landscapes
- Control Of Positive-Displacement Pumps (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
(イ〉産業上の利用分野
本発明は複数台の圧縮機の台数制御と、この圧縮機のう
ちの−・台の回転数制御とを併用した能力可変型の冷凍
装置に関する。DETAILED DESCRIPTION OF THE INVENTION (A) Industrial Application Field The present invention relates to a variable capacity type refrigeration system that uses both the number control of a plurality of compressors and the rotation speed control of one or more of the compressors. Regarding equipment.
(0)従来の技術
従来、この種の冷凍装置は特開昭59−94258号公
報等に記載され第6図に示すよう構成されていた。以下
説明すると、20は並列接続された2台の圧縮機A、B
と凝縮器21と膨張弁22と蒸発器23とを順次接続し
て構成詐れた冷凍サイクルである。24は前記圧縮機A
、Hの夫々に電気的に接続訪れ前記冷凍サイクル20の
負荷量に応じて運転台数の制御を行う制御器である。2
5は圧縮機Bだげに電気的に接続され冷凍ザイクル20
の負荷量に応じて該圧縮機の回転数制御を行う周波数可
変装置である。そして、斯る冷凍装置は、複数台の圧縮
機A、Hのうち、1台の圧縮機Bだけを回転数制御する
ことにより、周波数可変装置の電気容量を少く押え節電
を図る一方、圧縮機A、Hの容量比を1=2とし、かつ
、周波数可変装置25の可変能力を50〜100%とす
ることにより、第7図に示すように各制御領域■。(0) Prior Art Conventionally, this type of refrigeration apparatus has been described in Japanese Patent Application Laid-Open No. 59-94258, etc., and was constructed as shown in FIG. To explain below, 20 is two compressors A and B connected in parallel.
This is a refrigeration cycle with an incorrect configuration in which a condenser 21, an expansion valve 22, and an evaporator 23 are sequentially connected. 24 is the compressor A
This is a controller that is electrically connected to each of the refrigeration cycles 20 and H, and controls the number of operating units according to the load amount of the refrigeration cycle 20. 2
5 is electrically connected only to the compressor B and is a refrigerating cycle 20.
This is a variable frequency device that controls the rotation speed of the compressor according to the load amount of the compressor. By controlling the rotation speed of only one compressor B out of the plurality of compressors A and H, such a refrigeration system reduces the electric capacity of the frequency variable device and saves power. By setting the capacitance ratio of A and H to 1=2 and setting the variable capacity of the frequency variable device 25 to 50 to 100%, each control region (2) is set as shown in FIG.
■の制御範囲が、隣り合う領域で連続的にしかも直線的
につながるようにして広範囲の容量制御を行なっている
。Capacity control over a wide range is performed by connecting the control range (2) continuously and linearly in adjacent areas.
(ハ)発明が解決しようとする問題点
しかしながら上記の構成によると、各制御領域の制御範
囲が、隣り合う領域で連続的にしかも直線的につながっ
ているため、冷凍負荷と冷凍装置の容量が常に1:1の
対応となる。このため、冷凍負荷が互いに隣接する制御
領域で僅かに変動した場合、例えば、第7図中冷凍装置
の容量で66%付近に対応していた負荷が、僅かに増減
しだしたような場合には、領域I(圧縮機B1台の回転
数制御運転)と組合せ領域■(圧縮機Aの定速運転と圧
縮機Bの回転数制御運転の両運転)の間の移り変りが多
くなって、商用電源で運転される圧縮機Aの発停が頻発
し、制御が不安定になると共にショ−トサイクル運転を
起こすという問題がi)つた〇
本発明は断る点に鑑みなされたもので、各制御領域の境
界付近で負荷が変動しても、商用電源で運転される圧縮
機の発停が頻発しないようにして、制御を安定させると
共にショートサイクル運転を防止することを目的とする
。(c) Problems to be solved by the invention However, according to the above configuration, the control range of each control area is connected continuously and linearly in adjacent areas, so the refrigeration load and the capacity of the refrigeration system are There is always a 1:1 correspondence. Therefore, if the refrigeration load slightly fluctuates in adjacent control areas, for example, if the load corresponding to around 66% of the refrigeration equipment capacity in Figure 7 begins to increase or decrease slightly. In the case of commercial The problem is that the compressor A, which is operated by a power source, frequently starts and stops, making the control unstable and causing short cycle operation. The purpose is to prevent a compressor operated by commercial power from frequently starting and stopping even if the load fluctuates near the boundary of a region, thereby stabilizing control and preventing short-cycle operation.
(ニ)問題点を解決するための手段
本発明は並列接続された複数台の圧縮機、凝縮器、減圧
装置、及び蒸発器を順次接続して冷凍サイクルを構成し
てなり、前記冷凍サイクルに負荷量を検出する負荷検知
手段を設け、この手段からの信号に応じて前記圧縮機の
運転台数を制御する一方、同じく前記手段からの信号に
応じて前記圧縮機の一台を周波数可変装置により回転数
制御し、かつ、残りの圧縮機を商用電源で定速運転する
ようにした冷凍装置において、前記回転数制御される圧
縮機の制御範囲、または回転数制御される圧縮機と定速
運転される圧縮機の組合せの各制御範囲力釈隣り合う制
御領域で重なるよう構成したものである。(D) Means for Solving the Problems The present invention comprises a refrigeration cycle constructed by sequentially connecting a plurality of compressors, condensers, depressurizers, and evaporators connected in parallel. Load detection means for detecting the amount of load is provided, and the number of operating compressors is controlled according to a signal from this means, and one of the compressors is controlled by a frequency variable device according to a signal from the means. In a refrigeration system in which the rotation speed is controlled and the remaining compressors are operated at a constant speed using commercial power, the control range of the compressor whose rotation speed is controlled, or the compressor whose rotation speed is controlled and the constant speed operation. The control ranges of each compressor combination are configured so that they overlap in adjacent control ranges.
(ホ)作用
本発明の冷凍装置は上記の構成により、各制御領域にお
ける上限または下限付近の容量を、隣り合う夫々の制御
領域で重複して持たせることができ、例えば、従来構成
で各制御領域の境界付近の容量で対応していた冷凍負荷
が、僅かに増減した場合には、従来のような制御領域を
移す制御、すなわち、商用電源で運転する圧縮機の発停
制御をすることなく、同一の制御領域でそのニドま回転
数制御を行うことができ、商用電源で運転される圧縮機
の発停頻度を減らして制御を安定させると共にショート
サイクル運転を防止するようにしたものである。(e) Effect The refrigeration system of the present invention has the above-described configuration, so that the capacity near the upper limit or lower limit in each control area can be duplicated in each adjacent control area. For example, in the conventional configuration, each control area If the refrigeration load, which was handled by the capacity near the area boundary, increases or decreases slightly, the control area can be changed without the conventional control of shifting the control area, that is, starting and stopping the compressor operated by commercial power. It is possible to control the rotational speed within the same control range, reduce the frequency of starting and stopping of the compressor operated by commercial power, stabilize the control, and prevent short cycle operation. .
(へ)実施例 以下本発明の実施例を図面に基づいて説明する。(f) Example Embodiments of the present invention will be described below based on the drawings.
1は並列接続された3台の圧縮機A、B、C。1 has three compressors A, B, and C connected in parallel.
凝縮器2、膨張弁3、及び蒸発器4を順次接続して構成
した冷凍サイクルである。前記3台の圧縮機A、B、C
には夫々の容量が5Hp、 7.5Hp 。This is a refrigeration cycle configured by sequentially connecting a condenser 2, an expansion valve 3, and an evaporator 4. The three compressors A, B, C
The respective capacities are 5Hp and 7.5Hp.
10Hp(1: 1.5 : 2)と異なった容量のも
のが使用されている。5は前記冷凍サイクル1の低圧側
配管6に取付けられた圧力センサーであり、このセンサ
ーは冷凍サイクル1の負荷量として低圧圧力値を検出し
、この検出した値を電気信号に変えて後述する制御装置
7に出力している。ここで、前記圧縮機A、Cは電磁接
触器8,9を夫々介して三和交流電@12(商用電源)
に接続されており、また、圧縮機Bは25Hz 〜75
Hz(50〜150%)の範囲で可変する周波数可変装
置10、及び電磁接触器11を介して三相交流電源12
に接続されている。7は前記圧力センサー5からの信号
を入力し、この入力値と予め設定された設定値との差に
応じた信号を、前記電磁接触器8゜9.11や周波数可
変装置10に出力して、該接触器の0N−OFFや周波
数可変装置10の周波数制御を行ない、冷凍サイクル1
の負荷量に応じて圧縮機A、Cの台数制御を行うと共に
、同じく負荷量に応じて圧縮機Bの回転数制御を行う制
御装置である。Different capacities such as 10 Hp (1:1.5:2) are used. 5 is a pressure sensor attached to the low pressure side piping 6 of the refrigeration cycle 1, and this sensor detects a low pressure value as the load amount of the refrigeration cycle 1, converts this detected value into an electric signal, and performs the control described later. It is output to device 7. Here, the compressors A and C are powered by Sanwa AC power @ 12 (commercial power supply) via electromagnetic contactors 8 and 9, respectively.
and compressor B has a frequency of 25Hz to 75Hz.
A three-phase AC power source 12 via a frequency variable device 10 that varies in the range of Hz (50 to 150%) and an electromagnetic contactor 11
It is connected to the. 7 inputs the signal from the pressure sensor 5, and outputs a signal corresponding to the difference between this input value and a preset setting value to the electromagnetic contactor 8゜9.11 and the frequency variable device 10. , performs ON-OFF of the contactor and frequency control of the frequency variable device 10, and controls the refrigeration cycle 1.
This is a control device that controls the number of compressors A and C according to the load amount, and also controls the rotation speed of compressor B according to the load amount.
このように構成された冷凍装置において、その容量制御
範囲は第2図に示すようになる。ここで、周波数可変装
置10により回転数制御される圧縮機Bは固定容量が7
.5Hpであり、また、周波数可変装置10の可変能力
は50〜150%であるため、前記圧縮機Bの容量制御
範囲は3.75〜11.25Hpとなる。そして、もっ
とも容量の小さい領域■では、前記圧縮機Bだけで3.
75〜11.25Hpまでの容量制御が行なわれる。次
に容量の小さい組合ぜ領域すなわち回転数制御される圧
縮機Bと定速運転される5Hpの圧縮機Aの組合せ領域
■では、圧縮機A、Hの2台で8.75〜16.25H
pまでの容量制御が行なわれる。また、次に容量の小さ
い組合せ領域すなわち回転数制御される圧縮機Bと定速
運転されるtoupの圧縮機Cの組合せ領域■では、圧
縮機B、Cの2台で13.75〜21.25Hpまでの
容量制御が行なわれる。最後に容量のもっとも大きい組
合せ領域すなわち回転数制御される圧縮機Bと定速運転
される圧縮機A、Bの組合ぜ領域■では、圧縮機A。In the refrigeration system configured in this way, the capacity control range is as shown in FIG. Here, the compressor B whose rotation speed is controlled by the frequency variable device 10 has a fixed capacity of 7.
.. 5 Hp, and the variable capacity of the variable frequency device 10 is 50 to 150%, so the capacity control range of the compressor B is 3.75 to 11.25 Hp. In the area (3) where the capacity is the smallest, only the compressor B is used.
Capacity control is performed from 75 to 11.25 Hp. Next, in the combination area with a small capacity, that is, the combination area (■) of compressor B whose rotation speed is controlled and compressor A that operates at a constant speed of 5 Hp, the combination of compressors A and H is 8.75 to 16.25 H.
Capacity control is performed up to p. In addition, in the combination region (2) with the next smallest capacity, that is, the combination region (3) of compressor B whose rotation speed is controlled and toup compressor C which is operated at a constant speed, the combination of compressors B and C is 13.75 to 21. Capacity control is performed up to 25 Hp. Finally, in the combination region with the largest capacity, that is, the combination region (3) of compressor B whose rotation speed is controlled and compressors A and B which are operated at constant speed, compressor A is selected.
B、Cの3台で18.75〜26.251ipまでの容
量制御が行なわれる。Three units B and C control the capacity from 18.75 to 26.251 ip.
すなわち、冷凍装置の容量制御範囲は■〜■までの隣り
合う組合せ領域で一部重なるように(ヒステリシスを持
つように)設定される。これにより、例えば、第2図中
P点に示す容量に対応していた冷凍負荷が僅かに増減し
た場合には、組合せ領域■上で容量制御され、また同図
中Q点に示す容量に対応していた冷凍負荷が僅かに増減
した場合には、組合せ領域■上でそのまま容量制御され
るという具合いに、同じ負荷量であってもその時点の組
合せ領域内で制御することができる。このため、各組合
せ領域の境界付近で負荷が僅かに変動しても定速運転さ
れる圧縮機A、Cの発停が頻発したり、ショートサイク
ル運転を起こしたりするのを減少できる。なお、第3図
に上述した制御例における冷凍装置のヒステリシスを示
す。That is, the capacity control range of the refrigeration system is set so that the adjacent combination areas from ■ to ■ partially overlap (have hysteresis). As a result, for example, if the refrigeration load corresponding to the capacity shown at point P in Figure 2 changes slightly, the capacity will be controlled on the combination area ■, and the capacity will correspond to the capacity shown at point Q in the same figure. If the refrigeration load that was being used changes slightly, the capacity is directly controlled in the combination area (2), so even if the load is the same, it can be controlled within the combination area at that time. Therefore, even if the load fluctuates slightly near the boundary between each combination area, it is possible to reduce the occurrence of frequent starting and stopping of the compressors A and C, which are operated at a constant speed, and short cycle operation. Note that FIG. 3 shows the hysteresis of the refrigeration system in the control example described above.
また、第4図及び第5図は他の実施例を示す冷凍装置の
容量制御の説明図であり、第4図は夫々の固定容量が5
Hp、 7.5Hp、 10Hpの3台の圧縮機A、B
、Cを使い、かつ、10Hpの圧縮機Cを25〜75H
z(50〜150%)の範囲で回転数制御したもの、第
5図は夫々の固定容量が5Hp。Moreover, FIGS. 4 and 5 are explanatory diagrams of capacity control of a refrigeration system showing other embodiments, and FIG. 4 shows that each fixed capacity is 5.
Three compressors A and B with Hp, 7.5Hp, and 10Hp
, C, and a 10Hp compressor C for 25 to 75H.
The rotation speed is controlled in the range of z (50 to 150%), and each fixed capacity in FIG. 5 is 5 Hp.
7 、5 ttpの2台の圧縮機A、Bを使い、かつ、
7.5Hpの圧縮機Bを25〜75Hz(50〜150
%)の範囲で回転数制御したものであり、これらのもの
も各図に示す如く、隣り合う組合せ領域(制御領域)で
ヒステリシスを持つことができ、本実施例と同様の作用
効果を奏する。Using two compressors A and B of 7 and 5 ttp, and
7.5Hp compressor B at 25~75Hz (50~150Hz)
%), and as shown in each figure, these devices can also have hysteresis in adjacent combination areas (control areas), producing the same effects as the present embodiment.
(ト)発明の効果
以上のように本発明は並列接続された複数台の圧縮機、
凝縮器、減圧装置、及び蒸発器を順次接続して冷凍サイ
クルを構成してなり、前記冷凍サイクルに負荷量を検出
する負荷検知手段を設け、この手段からの信号に応じて
前記圧縮機の運転台数を制御する一方、同じく前記手段
からの信号に応じて前記圧縮機の一台を周波数可変装置
により回転数制御し、かつ、残りの圧縮機を商用電源で
定速運転するようにした冷凍装置において、前記回転数
制御される圧縮機の制御範囲、または回転数制御される
圧縮機と定速運転される圧縮機の組合せの各制御範囲が
、隣り合う制御領域で重なるよう構成したものであるか
ら、各制御領域の境界−〇−
付近の容量で対応していた冷凍負荷が僅かに増減した場
合に、制御領域が頻繁に移り変わるのを防ぐことができ
、商用電源で運転される圧縮機の発停頻度を減らして制
御を安定させると共にショートサイクル運転を防止する
ことができる。(g) Effects of the invention As described above, the present invention provides a plurality of compressors connected in parallel,
A refrigeration cycle is constructed by sequentially connecting a condenser, a pressure reducing device, and an evaporator, and the refrigeration cycle is provided with load detection means for detecting a load amount, and the compressor is operated in accordance with a signal from this means. A refrigeration system in which the number of compressors is controlled, the rotation speed of one of the compressors is controlled by a variable frequency device in response to a signal from the means, and the remaining compressors are operated at a constant speed using commercial power. The control range of the compressor whose rotation speed is controlled or the control range of the combination of the compressor whose rotation speed is controlled and the compressor which is operated at a constant speed is configured to overlap in adjacent control areas. Therefore, if the refrigeration load corresponding to the capacity near the boundary of each control area -〇- increases or decreases slightly, it is possible to prevent the control area from changing frequently. It is possible to reduce the frequency of starts and stops, stabilize control, and prevent short cycle operation.
第1図乃至第3図は本発明の実施例を示し、第1図は冷
凍装置の構成図、第2図は冷凍装置の容量制御を示す説
明図、第3図は容量制御のヒステリシスを示す説明図、
第4図及び第5図は夫々他の実施例の冷凍装置における
容量制御を示す説明図、第6図及び第7図は従来例を示
し、第6図は冷凍装置の構成図、第7図は冷凍装置の容
量制御を示す説明図である。
A、B、C・・・圧縮機、 1・・・冷凍サイクル、
2・・・凝縮器、 3・・・膨張弁、 4・・・蒸発器
、 5・・・圧カセンザー。
出願人 三洋電機株式会社外1名
代理人 弁理士 西野東嗣 外1名
第 1f!1
第2図
第3図
12 14 16 181、f1第4図
第5図
工 ■
第6図
第7図
II[Figures 1 to 3 show embodiments of the present invention, Figure 1 is a configuration diagram of a refrigeration system, Figure 2 is an explanatory diagram showing capacity control of the refrigeration system, and Figure 3 shows hysteresis of capacity control. Explanatory diagram,
FIGS. 4 and 5 are explanatory diagrams showing capacity control in refrigeration systems of other embodiments, FIGS. 6 and 7 show conventional examples, FIG. 6 is a block diagram of the refrigeration system, and FIG. FIG. 2 is an explanatory diagram showing capacity control of the refrigeration device. A, B, C... Compressor, 1... Refrigeration cycle,
2... Condenser, 3... Expansion valve, 4... Evaporator, 5... Pressure sensor. Applicant Sanyo Electric Co., Ltd. (1 other person) Representative Patent attorney Higashi Nishino (1 other person) No. 1f! 1 Fig. 2 Fig. 3 12 14 16 181, f1 Fig. 4 Fig. 5 ■ Fig. 6 Fig. 7 II [
Claims (1)
置、及び蒸発器を順次接続して冷凍サイクルを構成して
なり、前記冷凍サイクルに負荷量を検出する負荷検知手
段を設け、この手段からの信号に応じて前記圧縮機の運
転台数を制御する一方、同じく前記手段からの信号に応
じて前記圧縮機の一台を周波数可変装置により回転数制
御し、かつ、残りの圧縮機を商用電源で定速運転するよ
うにした冷凍装置において、前記回転数制御される圧縮
機の制御範囲、または回転数制御される圧縮機と定速運
転される圧縮機の組合せの各制御範囲が、隣り合う制御
領域で重なるよう構成したことを特徴とする冷凍装置。(1) A refrigeration cycle is constructed by sequentially connecting a plurality of compressors, condensers, pressure reduction devices, and evaporators connected in parallel, and the refrigeration cycle is provided with a load detection means for detecting a load amount, The number of operating compressors is controlled in response to a signal from this means, and the rotation speed of one of the compressors is controlled by a frequency variable device in response to a signal from the means, and the number of rotations of the remaining compressors is controlled by a variable frequency device. In a refrigeration system that operates at a constant speed using a commercial power supply, the control range of the compressor whose rotation speed is controlled or the control range of the combination of the compressor whose rotation speed is controlled and the compressor which is operated at a constant speed is , a refrigeration system characterized in that adjacent control areas are configured to overlap.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61168447A JP2686074B2 (en) | 1986-07-17 | 1986-07-17 | Refrigeration equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61168447A JP2686074B2 (en) | 1986-07-17 | 1986-07-17 | Refrigeration equipment |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6325457A true JPS6325457A (en) | 1988-02-02 |
JP2686074B2 JP2686074B2 (en) | 1997-12-08 |
Family
ID=15868279
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP61168447A Expired - Lifetime JP2686074B2 (en) | 1986-07-17 | 1986-07-17 | Refrigeration equipment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2686074B2 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01212869A (en) * | 1988-02-19 | 1989-08-25 | Matsushita Refrig Co Ltd | Multichamber type air conditioner |
JPH0211878A (en) * | 1988-06-29 | 1990-01-16 | Toshiba Corp | Control method for air conditioner |
JPH0359348A (en) * | 1989-07-26 | 1991-03-14 | Hitachi Ltd | Freezer device |
JP2008045814A (en) * | 2006-08-16 | 2008-02-28 | Tokyo Gas Co Ltd | Gas engine heat pump and its control method |
JP2010151424A (en) * | 2008-12-26 | 2010-07-08 | Daikin Ind Ltd | Refrigerating device |
CN101790644A (en) * | 2007-08-28 | 2010-07-28 | 佳能安内华股份有限公司 | Cryopump system |
EP1985939A4 (en) * | 2006-02-17 | 2015-03-11 | Daikin Ind Ltd | Air conditioner |
JP2016205742A (en) * | 2015-04-27 | 2016-12-08 | ヤマト科学株式会社 | Cooling system |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60253761A (en) * | 1984-05-30 | 1985-12-14 | 富士電機株式会社 | Method of controlling operation of refrigerator |
-
1986
- 1986-07-17 JP JP61168447A patent/JP2686074B2/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60253761A (en) * | 1984-05-30 | 1985-12-14 | 富士電機株式会社 | Method of controlling operation of refrigerator |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01212869A (en) * | 1988-02-19 | 1989-08-25 | Matsushita Refrig Co Ltd | Multichamber type air conditioner |
JPH0211878A (en) * | 1988-06-29 | 1990-01-16 | Toshiba Corp | Control method for air conditioner |
JPH0359348A (en) * | 1989-07-26 | 1991-03-14 | Hitachi Ltd | Freezer device |
EP1985939A4 (en) * | 2006-02-17 | 2015-03-11 | Daikin Ind Ltd | Air conditioner |
JP2008045814A (en) * | 2006-08-16 | 2008-02-28 | Tokyo Gas Co Ltd | Gas engine heat pump and its control method |
CN101790644A (en) * | 2007-08-28 | 2010-07-28 | 佳能安内华股份有限公司 | Cryopump system |
JP2010151424A (en) * | 2008-12-26 | 2010-07-08 | Daikin Ind Ltd | Refrigerating device |
JP2016205742A (en) * | 2015-04-27 | 2016-12-08 | ヤマト科学株式会社 | Cooling system |
Also Published As
Publication number | Publication date |
---|---|
JP2686074B2 (en) | 1997-12-08 |
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Legal Events
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EXPY | Cancellation because of completion of term |