JPH06101910A - Temperature regulator of refrigerator - Google Patents
Temperature regulator of refrigeratorInfo
- Publication number
- JPH06101910A JPH06101910A JP19674492A JP19674492A JPH06101910A JP H06101910 A JPH06101910 A JP H06101910A JP 19674492 A JP19674492 A JP 19674492A JP 19674492 A JP19674492 A JP 19674492A JP H06101910 A JPH06101910 A JP H06101910A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- water temperature
- outlet
- detector
- value
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0003—Exclusively-fluid systems
-
- 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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/1906—Control of temperature characterised by the use of electric means using an analogue comparing device
- G05D23/1912—Control of temperature characterised by the use of electric means using an analogue comparing device whose output amplitude can take more than two discrete values
-
- 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
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/025—Compressor control by controlling speed
- F25B2600/0251—Compressor control by controlling speed with on-off operation
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、複数の段階容量制御機
構を有する圧縮機を組込んだ冷凍装置において、一定幅
の水温の冷温水を供給することを必要とする冷凍装置の
温度調節器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 machine incorporating a compressor having a plurality of stage capacity control mechanisms, and a refrigerating machine temperature controller which requires supply of cold and hot water having a constant temperature. It is about.
【０００２】[0002]
【従来の技術】冷温水の出口温度を精密に制御するため
には、連続制御機構を有する圧縮機を用いて連続制御コ
ントローラによる制御方法、または冷温水出口系統に別
の冷媒と熱交する熱交換器を設け冷媒熱で出口温度をよ
り精密に制御させる方法（特開平1−3470 号）等がある
が、この方法は圧縮機を停止させず、低下した冷水を再
加熱する方法で、出口水温制御の精度は向上するが、別
の熱交換器を設ける必要があるので装置も大型化し、価
格面でかなりアップすることになる。2. Description of the Related Art In order to precisely control the outlet temperature of cold / hot water, a control method using a compressor having a continuous control mechanism by a continuous control controller, or the heat of heat exchange with another refrigerant in the cold / hot water outlet system is used. There is a method of more accurately controlling the outlet temperature with the heat of the refrigerant provided with an exchanger (Japanese Patent Laid-Open No. 1-3470), but this method is a method of reheating the cold water that has fallen without stopping the compressor. Although the accuracy of water temperature control is improved, it is necessary to provide another heat exchanger, so that the device becomes large in size and the price is considerably improved.
【０００３】[0003]
【発明が解決しようとする課題】複数の容量制御機構付
圧縮機を組込んだ冷凍装置においても、出口水温のみ、
または入口水温のみを検知する検知器の値１１を読み込
んで、温度調節器上で設定された温度に達したとき容量
を減少させる信号を出す制御方式のものは、負荷が急に
変動し増加した場合上記設定温度と一定の温度の幅(デ
ィファレンシャル)だけ上昇しないと冷凍装置の容量を
一段増加させることが出来ないため、負荷の変動に対し
て、出口水温が大幅に変化する制御しか出来ない。それ
は入口水温制御の場合圧縮機の容量制御段数が多いほど
出口水温の変化が大きくなる。また出口水温制御の場
合、圧縮機の容量制御段数が多いほど出口水温が低くな
りすぎる。本発明は前記冷凍装置の入口水温と出口水温
を別々に検知する検知器からの読み込み値と温度調節器
上で設定された値と、一定の幅を越えたときのみ圧縮機
の容量を増減させ、また圧縮機が停止するときは入口水
温を検知する検知器からの読み込み値と、その値より一
定幅入口水温が上昇したとき圧縮機を再起動させて、出
口水温を一定幅に納めることを目的とする。Even in a refrigerating apparatus incorporating a plurality of compressors with capacity control mechanisms, only the outlet water temperature is
Alternatively, the control system that reads the value 11 of the detector that detects only the inlet water temperature and outputs a signal to decrease the capacity when the temperature set on the temperature controller has increased due to a sudden change in load. In this case, the capacity of the refrigeration system cannot be further increased unless it is increased by the range (differential) between the set temperature and the constant temperature. Therefore, the outlet water temperature can only be controlled so as to drastically change in response to load fluctuations. In the case of inlet water temperature control, the greater the number of compressor capacity control stages, the greater the change in outlet water temperature. Further, in the case of the outlet water temperature control, the outlet water temperature becomes too low as the number of capacity control stages of the compressor increases. The present invention increases or decreases the capacity of the compressor only when the reading value from the detector for separately detecting the inlet water temperature and the outlet water temperature of the refrigerating apparatus and the value set on the temperature controller, and a certain width are exceeded. In addition, when the compressor stops, the reading value from the detector that detects the inlet water temperature and a certain width from that value When the inlet water temperature rises, the compressor is restarted and the outlet water temperature is kept within a certain range. To aim.
【０００４】[0004]
【課題を解決するための手段】本発明は、出口水温を一
定の温度幅に納めるために、容量制御機構付圧縮機と、
凝縮器と、蒸発器と、膨張弁とを配管により接続して冷
凍サイクルを構成し、利用水を冷却又は過熱する冷凍装
置の温度調節器において、前記冷凍装置の出口水温検出
器及び入口水温検出器と、該出口水温の上限値と下限値
を設定するとともに、設定温度範囲を上限値以上と下限
値以下と該上下限値間の中立帯と停止温度設定値とに分
けて設定した設定温度比較演算装温と、前記圧縮機の運
転を停止後は前記入口水温検出器からの信号と前記設定
温度比較演算装置からの信号とを読み込み再起動を判断
する再起動比較演算装置とを設けた。また、冷水をつく
る場合と温水をつくる場合に、温度調節器の設定を冷水
用と温水用に切替えて使用するために、出口水温検出器
と設定温度比較演算装置との間に前記出口水温検出器か
らの信号を読み込む出口水温読み込み装置と、入口水温
検出器と再起動比較演算装置との間に前記入口水温検出
器からの信号読み込む入口水温読み込み装置とを設け、
両読み込み装置を冷水用と温水用との設定値切替装置に
より接続した。DISCLOSURE OF THE INVENTION In order to keep the outlet water temperature within a constant temperature range, the present invention provides a compressor with a capacity control mechanism,
A condenser, an evaporator, and an expansion valve are connected by piping to form a refrigeration cycle, and in a temperature controller of a refrigeration system that cools or overheats utilization water, an outlet water temperature detector and an inlet water temperature detection of the refrigeration system. And an upper limit value and a lower limit value of the outlet water temperature are set, and a set temperature range is set by dividing the set temperature range into an upper limit value and a lower limit value and a neutral zone between the upper and lower limit values and a stop temperature set value. A comparison calculation temperature controller and a restart comparison calculation device for determining a restart by reading a signal from the inlet water temperature detector and a signal from the set temperature comparison calculation device after the operation of the compressor is stopped are provided. . In addition, when making cold water and making hot water, in order to switch the setting of the temperature controller between cold water and hot water, the outlet water temperature detector is set between the outlet water temperature detector and the set temperature comparison calculation device. An outlet water temperature reading device for reading a signal from the inlet, and an inlet water temperature reading device for reading a signal from the inlet water temperature detector between the inlet water temperature detector and the restart comparison operation device,
Both reading devices were connected by a set value switching device for cold water and hot water.
【０００５】[0005]
【作用】圧縮機運転中は温度調節器上の設定された温度
と一定幅異なる温度の幅（中立帯）内に出口水温を検知
する検知器の検出値が納っていると、圧縮機の容量を増
加する信号および減少する信号も出さずに、同じ圧縮機
容量で運転を維持する。出口水温の検知器の読み込み値
が上記の中立帯を越えたとき、すなわち、設定上限値を
越えたときにはただちに、圧縮機の容量を一段増加また
減少させて、出口水温を中立帯の幅内に入る様に制御す
る。またこれ以上圧縮機の容量を減少することが出来な
くて中立帯を越えると上記の中立帯と一定温度異なった
別の設定温度の下限値を越えて圧縮機停止用設定温度に
達したとき圧縮機を停止させる信号を出して出口水温を
中立帯設定温度内に戻す。また圧縮機が停止したときは
出口水温が急に上昇するので、入口水温を検知する検知
器の読み込み値が一定温度上昇したとき圧縮機の再起動
の信号を出し、圧縮機の運転により出口水温を中立帯設
定温度内に戻すことで出口水温を一定幅の温度に制御出
来る。[Operation] During the operation of the compressor, if the value detected by the detector for detecting the outlet water temperature is within the temperature range (neutral zone) that is different from the set temperature on the temperature controller by a certain width, It keeps running at the same compressor capacity without giving up and down signals. Immediately when the reading value of the outlet water temperature detector exceeds the above-mentioned neutral zone, that is, when it exceeds the set upper limit value, immediately increase or decrease the capacity of the compressor to reduce the outlet water temperature to within the width of the neutral zone. Control to enter. If the capacity of the compressor cannot be reduced any further and the temperature exceeds the neutral zone, the compressor will be compressed when it reaches the preset temperature for stopping the compressor by exceeding the lower limit of another preset temperature that is different from the neutral zone by a certain temperature. Send a signal to stop the machine and return the outlet water temperature to the neutral zone set temperature. Also, when the compressor stops, the outlet water temperature rises rapidly, so when the reading value of the detector that detects the inlet water temperature rises by a certain temperature, a signal to restart the compressor is output and the outlet water temperature is activated by the operation of the compressor. It is possible to control the outlet water temperature within a certain range by returning the water temperature within the neutral zone set temperature.
【０００６】[0006]
【実施例】以下、本発明の一実施例を図１，図２，図３
により説明する。図１は冷水をつくる場合の制御ブロッ
ク図を示し、冷凍装置２０内の被冷却体へ送出する冷水
配管１４内に取付けられた冷水出口温度を検知する検知
器１は通常サーミスターであり、検知する周囲の温度で
その抵抗値が変化する。また被冷却体からの返水の冷水
配管１５内に取付けられた冷水入口温度を検知する検知
器２も通常サーミスターで、検知する周囲温度でその抵
抗値が変化する。該検知器１，検知器２の抵抗値は連続
して、それぞれ冷水出口温度読み込み装置４と冷水入口
温度読み込み装置６に読み込まれる。この温度調節器３
には冷水出口温度設定する装置すなわち下限値を定め、
また設定された温度より高い温度で可変に設定出来る装
置すなわち上限値を定める設定温度比較演算装置５を有
し、そしてこの設定下限値と設定上限値の間を中立帯９
が設定記憶されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.
Will be described. FIG. 1 shows a control block diagram in the case of producing chilled water. A detector 1 for detecting the chilled water outlet temperature mounted in a chilled water pipe 14 for delivering to a cooled object in a refrigerating device 20 is usually a thermistor, The resistance value changes depending on the ambient temperature. Further, the detector 2 for detecting the cold water inlet temperature mounted in the cold water pipe 15 of the return water from the object to be cooled is also usually a thermistor, and its resistance value changes depending on the ambient temperature to be detected. The resistance values of the detector 1 and the detector 2 are continuously read by the cold water outlet temperature reading device 4 and the cold water inlet temperature reading device 6, respectively. This temperature controller 3
Is a device for setting the cold water outlet temperature, that is, the lower limit value,
Further, it has a device which can be variably set at a temperature higher than the set temperature, that is, a set temperature comparison operation device 5 which sets an upper limit value, and a neutral zone 9 is provided between the set lower limit value and the set upper limit value.
Is set and stored.
【０００７】また、該設定温度比較演算装置５には、上
限値以上８の範囲と、下限値以下１０の範囲および停止
温度設定値１１が設定されている。７は再起動比較演算
装置で、停止時における入口水温に設定温度加算設定値
１２を算出するために前記設定温度比較演算装置５と冷
水入口温度読み込み装置６と信号のやりとりが可能に接
続されている。Further, in the set temperature comparison / calculation device 5, a range of not less than the upper limit value and 8 and a range of not more than the lower limit value 10 and a stop temperature set value 11 are set. Reference numeral 7 is a restart comparison calculation device, which is connected to the set temperature comparison calculation device 5 and the cold water inlet temperature reading device 6 so as to be able to exchange signals in order to calculate the set temperature addition set value 12 for the inlet water temperature at the time of stop. There is.
【０００８】１３は、設定値切替装置で、前記冷水出口
温度読み込み装置４と冷水入口温度読み込み装置６を冷
水をつくる場合と、温水をつくる場合とで設定値を切替
えられるように接続されている。A set value switching device 13 is connected to the cold water outlet temperature reading device 4 and the cold water inlet temperature reading device 6 so that the set values can be switched depending on whether cold water is produced or hot water is produced. .
【０００９】前述の冷水出口温度読み込み装置４に読み
込まれた値とこの中立帯９に記憶された値を設定温度比
較演算装置５にて比較演算を行なう。そこで冷水出口温
度読み込み装置４に読み込まれた値が中立帯９の上限値
をこえていれば一段容量増加の信号を上限値以上８と判
定し発信する。逆に中立帯９の下限値以下ならば一段容
量減少（たとえば７５％容量）の信号を下限値以下１０
と判定し発信する。発信された一負荷の例は図２に示
す。図において中立帯９の幅から外れたときのみ容量増
加または減少の信号が出ているので、中立帯９内にある
ときは無信号の状態で同一容量で圧縮機は運転し、冷水
出口温度はたえず、中立帯９内に納まるように制御され
る。次に負荷が減少して最小容量（たとえば２５％容
量）運転でもまだ冷水出口温度が低下するときはもう一
段容量減少の信号を出せないので、このときには前もっ
て設定された停止温度設定値１１と比較して、冷水出口
温度として読み込まれた値がこの停止温度設定値１１に
達したとき、圧縮機停止信号を発信する。圧縮機が停止
したときの冷水出口温度の変動は図２の圧縮機停止信号
の区分の部分に示した変動とする。次に停止温度設定値
１１が作動すると再起動比較演算装置７にも停止信号が
伝達され、冷水入口温度読み込み装置６に読み込まれた
値を引き出し、前もって設定された温度を停止時におけ
る入口温度に設定温度加算設定値１２の値を求め、やが
て負荷が増加して入口水温が上昇して、設定値１２の温
度に達したとき、圧縮機再起動の信号を発信する。以上
のように冷水出口および冷水入口の両方を制御すること
で、図２に示す冷水出口温度を一定の幅内に納められ
る。また暖房用として使用する場合は、冷水用と温水用
との設定値切替装置１３を温水側に切替えると、前述の
冷水制御を暖房用の温水制御に変えることができる。A set temperature comparison calculation device 5 compares the value read by the cold water outlet temperature reading device 4 and the value stored in the neutral zone 9 with each other. Therefore, if the value read by the cold water outlet temperature reading device 4 exceeds the upper limit value of the neutral zone 9, the signal of the capacity increase by one step is determined to be 8 or more as the upper limit value and transmitted. On the contrary, if it is below the lower limit value of the neutral zone 9, a signal of one-stage capacity reduction (for example, 75% capacity) is set below the lower limit value 10
And send. An example of one transmitted load is shown in FIG. In the figure, the signal for capacity increase or decrease is output only when the width is out of the width of the neutral zone 9, so when in the neutral zone 9, the compressor operates with the same capacity with no signal and the chilled water outlet temperature is It is constantly controlled so that it is contained in the neutral zone 9. Next, when the load decreases and the chilled water outlet temperature still decreases even when operating at the minimum capacity (for example, 25% capacity), another signal indicating that the capacity is decreasing cannot be output. At this time, compare it with the preset stop temperature setting value 11. Then, when the value read as the cold water outlet temperature reaches the stop temperature set value 11, the compressor stop signal is transmitted. The fluctuation of the cold water outlet temperature when the compressor is stopped is the fluctuation shown in the section of the compressor stop signal section in FIG. Next, when the stop temperature set value 11 is activated, the stop signal is also transmitted to the restart comparison and calculation device 7, the value read by the cold water inlet temperature reading device 6 is drawn, and the preset temperature is set as the inlet temperature at the time of stop. The value of the set temperature addition set value 12 is calculated, and when the load increases and the inlet water temperature rises to reach the set value 12, the compressor restart signal is transmitted. By controlling both the cold water outlet and the cold water inlet as described above, the cold water outlet temperature shown in FIG. 2 can be kept within a certain range. When used for heating, if the set value switching device 13 for cold water and hot water is switched to the hot water side, the above-mentioned cold water control can be changed to hot water control for heating.
【００１０】[0010]
【発明の効果】本発明によれば、連続制御圧縮機の採用
による連続制御コントローラによる制御や付加熱交換器
を用いることなく小型化でき、複数の段階容量制御機構
を有する圧縮機を組込んだ冷凍装置の出口水温の変動を
一定の温度幅内で制御し安定した水温を得ることが出来
る。According to the present invention, a compressor having a plurality of step-capacity control mechanisms can be incorporated, which can be miniaturized without using a control by a continuous control controller or an additional heat exchanger by adopting a continuous control compressor. It is possible to obtain a stable water temperature by controlling the fluctuation of the outlet water temperature of the refrigeration system within a constant temperature range.
【図１】本発明の一実施例を示す制御ブロック図。FIG. 1 is a control block diagram showing an embodiment of the present invention.
【図２】同実施例による水温変化を示すタイムチャート
図。FIG. 2 is a time chart diagram showing changes in water temperature according to the embodiment.
１…出口水温検出器、２…入口水温検出器、４…冷水出
口温度読み込み装置、５…設定温度比較演算装置、６…
冷水入口温度読み込み装置、７…再起動比較演算装置、
８…上限値以上一段容量増加信号発生装置、９…中立帯
無信号、１０…下限値以下一段容量減少信号発生装置、
１１…停止時における入口温度に設定の装置、１２…停
止時における入口温度に設定温度加算設定値の装置、１
３…冷水用と温水用との設定値切替装置、２０…冷凍装
置。1 ... Outlet water temperature detector, 2 ... Inlet water temperature detector, 4 ... Cold water outlet temperature reading device, 5 ... Set temperature comparison calculation device, 6 ...
Cold water inlet temperature reading device, 7 ... Reboot comparison calculation device,
8 ... One-stage capacity increase signal generator above the upper limit value, 9 ... Neutral zone no signal, 10 ... One-stage capacity decrease signal generator below the lower limit value,
11 ... Device for setting inlet temperature at stop, 12 ... Device for setting addition temperature at inlet temperature at stop, 1
3 ... Set value switching device for cold water and hot water, 20 ... Refrigerating device.
Claims (2)
器と、膨張弁とを配管により接続して冷凍サイクルを構
成し、利用水を冷却又は過熱する冷凍装置の温度調節器
において、前記冷凍装置の出口水温検出器及び入口水温
検出器と、該出口水温の上限値と下限値を設定するとと
もに、設定温度範囲を上限値以上と下限値以下と該上下
限値間の中立帯と停止温度設定値とに分けて設定した設
定温度比較演算装温と、前記圧縮機の運転を停止後は前
記入口水温検出器からの信号と前記設定温度比較演算装
置からの信号とを読み込み再起動を判断する再起動比較
演算装置とを設けたことを特徴とする冷凍装置の温度調
節器。1. A temperature controller of a refrigerating apparatus for cooling or overheating utilization water, wherein a compressor with a capacity control mechanism, a condenser, an evaporator and an expansion valve are connected by piping to form a refrigeration cycle. The outlet water temperature detector and the inlet water temperature detector of the refrigerating apparatus, and the upper limit value and the lower limit value of the outlet water temperature are set, and the set temperature range is a neutral zone between the upper limit value and the lower limit value and the upper and lower limit values. And the set value for the stop temperature, the set temperature comparison and calculation temperature is set separately, and after the compressor operation is stopped, the signal from the inlet water temperature detector and the signal from the set temperature comparison and calculation device are read and read again. A temperature controller for a refrigerating apparatus, comprising: a restart comparison arithmetic unit for determining start-up.
の間に前記出口水温検出器からの信号を読み込む出口水
温読み込み装置と、入口水温検出器と再起動比較演算装
置との間に前記入口水温検出器からの信号読み込む入口
水温読み込み装置とを設け、両読み込み装置を冷水用と
温水用との設定値切替装置により接続したことを特徴と
する請求項１の冷凍装置の温度調節器。2. An outlet water temperature reading device for reading a signal from the outlet water temperature detector between the outlet water temperature detector and the set temperature comparison and calculation device, and the inlet water temperature detector and the restart comparison and calculation device. An inlet water temperature reading device for reading a signal from the inlet water temperature detector is provided, and both reading devices are connected by a set value switching device for cold water and for hot water.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4196744A JP2708053B2 (en) | 1992-07-23 | 1992-07-23 | Refrigerator temperature controller |
| GB9315007A GB2269684B (en) | 1992-07-23 | 1993-07-20 | Refrigerating Apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4196744A JP2708053B2 (en) | 1992-07-23 | 1992-07-23 | Refrigerator temperature controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06101910A true JPH06101910A (en) | 1994-04-12 |
| JP2708053B2 JP2708053B2 (en) | 1998-02-04 |
Family
ID=16362886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4196744A Expired - Fee Related JP2708053B2 (en) | 1992-07-23 | 1992-07-23 | Refrigerator temperature controller |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2708053B2 (en) |
| GB (1) | GB2269684B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008101884A (en) * | 2006-10-20 | 2008-05-01 | Mitsubishi Heavy Ind Ltd | Heat source machine, heat source system and control method of heat source machine |
| WO2014030083A3 (en) * | 2012-08-20 | 2014-04-17 | Agile 8 Consulting Limited | A system and method for improving efficiency of a refrigerant based system |
| JP2015087078A (en) * | 2013-11-01 | 2015-05-07 | 三浦工業株式会社 | Food machine with vacuum cooling function |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2309552B (en) * | 1996-01-25 | 2000-01-19 | Rwl Consultants Ltd | Failsafe system monitoring |
| US6206652B1 (en) | 1998-08-25 | 2001-03-27 | Copeland Corporation | Compressor capacity modulation |
| EP2012068A1 (en) * | 2007-06-04 | 2009-01-07 | RHOSS S.p.A. | Method for regulating the delivery temperature of a service fluid in output from a refrigerating machine |
| US8157538B2 (en) | 2007-07-23 | 2012-04-17 | Emerson Climate Technologies, Inc. | Capacity modulation system for compressor and method |
| EP2391826B1 (en) | 2009-01-27 | 2017-03-15 | Emerson Climate Technologies, Inc. | Unloader system and method for a compressor |
| US10378533B2 (en) | 2011-12-06 | 2019-08-13 | Bitzer Us, Inc. | Control for compressor unloading system |
| US20230092474A1 (en) * | 2021-09-23 | 2023-03-23 | Carel Industries S.P.A | Regulation method and regulation apparatus of a refrigeration plant and respective refrigeration plant including such apparatus |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5610643A (en) * | 1979-07-06 | 1981-02-03 | Mitsubishi Electric Corp | Water cooler |
| JPS56164477U (en) * | 1980-05-09 | 1981-12-05 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8702008D0 (en) * | 1987-01-29 | 1987-03-04 | Calibre Energy Systems Ltd | Energy producing source control |
-
1992
- 1992-07-23 JP JP4196744A patent/JP2708053B2/en not_active Expired - Fee Related
-
1993
- 1993-07-20 GB GB9315007A patent/GB2269684B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5610643A (en) * | 1979-07-06 | 1981-02-03 | Mitsubishi Electric Corp | Water cooler |
| JPS56164477U (en) * | 1980-05-09 | 1981-12-05 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008101884A (en) * | 2006-10-20 | 2008-05-01 | Mitsubishi Heavy Ind Ltd | Heat source machine, heat source system and control method of heat source machine |
| WO2014030083A3 (en) * | 2012-08-20 | 2014-04-17 | Agile 8 Consulting Limited | A system and method for improving efficiency of a refrigerant based system |
| JP2015531051A (en) * | 2012-08-20 | 2015-10-29 | アジャイル ８ コンサルティング リミテッドＡｇｉｌｅ ８ Ｃｏｎｓｕｌｔｉｎｇ Ｌｉｍｉｔｅｄ | System and method for improving the efficiency of a coolant system |
| US9664426B2 (en) | 2012-08-20 | 2017-05-30 | Agile8 Consulting Limited | System and method for improving efficiency of a refrigerant based system |
| JP2015087078A (en) * | 2013-11-01 | 2015-05-07 | 三浦工業株式会社 | Food machine with vacuum cooling function |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9315007D0 (en) | 1993-09-01 |
| GB2269684A (en) | 1994-02-16 |
| JP2708053B2 (en) | 1998-02-04 |
| GB2269684B (en) | 1996-05-22 |
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