JPH081340B2 - Refrigeration cycle - Google Patents
Refrigeration cycleInfo
- Publication number
- JPH081340B2 JPH081340B2 JP61163453A JP16345386A JPH081340B2 JP H081340 B2 JPH081340 B2 JP H081340B2 JP 61163453 A JP61163453 A JP 61163453A JP 16345386 A JP16345386 A JP 16345386A JP H081340 B2 JPH081340 B2 JP H081340B2
- Authority
- JP
- Japan
- Prior art keywords
- heat storage
- heat
- compressor
- temperature
- refrigeration cycle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
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
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
-
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
-
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
-
- 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
- F25B2400/04—Refrigeration circuit bypassing means
- F25B2400/0403—Refrigeration circuit bypassing means for the condenser
-
- 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
- F25B2600/11—Fan speed control
- F25B2600/112—Fan speed control of evaporator fans
-
- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Description
【発明の詳細な説明】 〔発明の目的〕 （産業上の利用分野） 本発明は冷凍サイクルに係り、特に蓄熱器を備えた冷
凍サイクルに関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a refrigeration cycle, and more particularly to a refrigeration cycle provided with a heat accumulator.
（従来の技術） 冷凍サイクルに蓄熱器を設け、この蓄熱器に蓄えた熱
を一時的に利用して能力向上を図る試みは従来からなさ
れていた。従来のこの種の冷凍サイクルとして例えば第
６図に示される特公昭49−20023号公報記載のものがあ
る。この冷凍サイクルは、冷凍運転時に圧縮機で高温高
圧になった冷媒を蓄熱器２に導き蓄熱しておき、蒸発器
表面の着霜や結氷を融解する除霜運転時にこの蓄熱を利
用するように構成したものである。即ち、冷凍運転時に
は冷媒は実線矢印で示されるように順次圧縮機１、四方
弁３、蓄熱器２、凝縮器４、減圧装置７、蒸発器８を流
れ圧縮機１に還流し、このサイクルの間に蓄熱器２に高
温冷媒からその熱を吸収し蓄熱しておく一方、除霜運転
時には四方弁３を切換えて流路切換えを図り、冷媒は破
線矢印で示されるように順次圧縮機１、四方弁３、蒸発
器８、バイパス管Ｂ、蓄熱器２を流れ圧縮機１に還流
し、このとき蒸発器８を除霜して熱交換され液化した冷
媒は蓄熱器２で熱交換されて気化して圧縮機１に戻るよ
うになっている。なお、符号23,24,25は逆止弁である。
このように冷凍運転時に高温冷媒より吸熱して蓄熱する
一方、除霜運転時に蒸発器を通過して除霜後の冷媒に上
記蓄熱を放出して加熱するようにしたものである。(Prior Art) It has been conventionally attempted to provide a regenerator in a refrigeration cycle and temporarily utilize the heat stored in the regenerator to improve the capacity. As a conventional refrigeration cycle of this type, for example, there is one described in Japanese Patent Publication No. 49-20023 shown in FIG. In this refrigeration cycle, the refrigerant that has become high temperature and high pressure in the compressor during freezing operation is guided to the heat storage device 2 to store the heat therein, and this heat storage is used during the defrosting operation for melting frost and freezing of the evaporator surface. It is composed. That is, during the refrigerating operation, the refrigerant flows through the compressor 1, the four-way valve 3, the heat storage device 2, the condenser 4, the decompression device 7, and the evaporator 8 sequentially to the compressor 1 as shown by the solid line arrow. In the meantime, the heat from the high-temperature refrigerant is absorbed and stored in the heat storage device 2, while the four-way valve 3 is switched during defrosting operation to switch the flow paths, and the refrigerant is sequentially compressed by the compressor 1 as indicated by the broken line arrow. The four-way valve 3, the evaporator 8, the bypass pipe B, and the heat accumulator 2 flow back to the compressor 1. At this time, the evaporator 8 is defrosted and the heat-exchanged and liquefied refrigerant is heat-exchanged in the heat accumulator 2 to be vaporized. It is adapted to return to the compressor 1. Reference numerals 23, 24 and 25 are check valves.
In this way, during the freezing operation, the heat is absorbed from the high-temperature refrigerant to store the heat, while during the defrosting operation, the heat is released and heated to the refrigerant after passing through the evaporator after defrosting.
（発明が解決しようとする問題点） しかしながら、上述の冷凍サイクルにあっては、蓄熱
器２における蓄熱は除霜改善には利用されていたが、最
も蓄熱器の蓄熱を利用したい冷凍サイクルの利用側熱交
換器（凝縮器）の立上り時には全く利用されていないと
いう問題点がある。(Problems to be Solved by the Invention) However, in the refrigeration cycle described above, the heat storage in the heat storage device 2 was used for defrosting improvement, but the use of the refrigeration cycle in which the heat storage of the heat storage device is most desired is used. There is a problem that it is not used at all when the side heat exchanger (condenser) rises.
また、蓄熱時に圧縮機１から蓄熱器２に至るまでの管
路Ａは高圧となり、冷媒はバイパス管Ｂに流入する。即
ち、蓄熱時に逆止弁23から管路Ａの分岐点に至るまでの
バイパス管Ｂが液溜りになるという問題点がある。Further, during heat storage, the pipeline A from the compressor 1 to the heat storage device 2 has a high pressure, and the refrigerant flows into the bypass pipe B. That is, there is a problem that the bypass pipe B from the check valve 23 to the branch point of the pipe line A becomes a reservoir when heat is stored.
本発明は上記事情に鑑み創案されたもので、その目的
とする処は、冷凍サイクルの利用側熱交換器（凝縮器）
の立上り時に蓄熱器における蓄熱を有効に利用すること
ができるとともに各管路の液溜りを解消することができ
る冷凍サイクルを提供することにある。The present invention has been made in view of the above circumstances, and its object is to use a heat exchanger (condenser) on the utilization side of a refrigeration cycle.
It is an object of the present invention to provide a refrigeration cycle capable of effectively utilizing the heat storage in the regenerator at the start-up of (1) and eliminating the liquid pool in each pipeline.
（問題点を解決するための手段） 上記問題点を解決するため本発明は、圧縮機、凝縮
器、減圧装置、蒸発器を順次管路で接続してなる冷凍サ
イクルにおいて、上記圧縮機の吐出側と凝縮器との間に
蓄熱器を介装するとともに、バイパス管の一端を上記凝
縮器と減圧装置との間に接続し他端を上記蓄熱器を介し
て上記減圧装置と蒸発器との間に接続するように設け、
さらに上記蓄熱器内に蓄熱温度センサを設け、この蓄熱
温度センサの検出値にもとずき蒸発器用ファンをON・OF
F制御するようにしたことを特徴とするものである。(Means for Solving the Problems) In order to solve the above problems, the present invention provides a discharge of the compressor in a refrigeration cycle in which a compressor, a condenser, a decompression device, and an evaporator are sequentially connected by pipelines. While accumulating a heat storage device between the side and the condenser, one end of the bypass pipe is connected between the condenser and the pressure reducing device, and the other end is connected between the pressure reducing device and the evaporator via the heat storage device. It is installed so as to connect between
Furthermore, a heat storage temperature sensor is installed in the heat storage device, and the evaporator fan is turned on / off based on the detection value of this heat storage temperature sensor.
The feature is that the F control is performed.
（作用） 本発明は前記手段により、蓄熱器に蓄熱された熱を利
用する冷凍サイクルの利用側熱交換器（凝縮器）の立上
り運転時には、圧縮機で加圧された冷媒は蓄熱器を介し
て凝縮器を通り、ここで熱交換が行われ、この凝縮器を
経てバイパス管に流入した冷媒は蓄熱器で熱交換され加
熱された後、蒸発器を介して圧縮機に還流し、冷媒の蒸
発温度を高くし、圧縮機の吸込圧力が高くなり冷媒の循
環量が増大するため、凝縮器で大きな出力で暖房を行う
ことができる。また、蓄熱温度センサにより検出した蓄
熱器における温度が高い場合には、蒸発器用ファンをOF
Fして蒸発器での放熱を防止し、逆に低い場合には、蒸
発器用ファンをONして蒸発器で吸熱を行い利用側熱交換
器（凝縮器）の立上り時における蓄熱利用運転時の放熱
損失を防止するものである。(Operation) According to the present invention, during the startup operation of the utilization side heat exchanger (condenser) of the refrigeration cycle that utilizes the heat stored in the heat storage device, the refrigerant pressurized by the compressor passes through the heat storage device. Through the condenser, where heat is exchanged, and the refrigerant that has flowed into the bypass pipe through this condenser is heat-exchanged and heated in the regenerator, and then returns to the compressor via the evaporator, Since the evaporation temperature is increased, the suction pressure of the compressor is increased, and the circulation amount of the refrigerant is increased, it is possible to perform heating with a large output in the condenser. If the temperature of the heat storage device detected by the heat storage temperature sensor is high, turn the evaporator fan off.
F to prevent heat dissipation in the evaporator, and on the contrary, when it is low, the evaporator fan is turned on to absorb heat in the evaporator, and when the heat storage utilization operation at the startup of the heat exchanger (condenser) on the use side is performed It is intended to prevent heat loss.
（実施例） 以下、本発明に係る冷凍サイクルの実施例を第１図及
び第２図を参照して説明する。(Embodiment) An embodiment of the refrigeration cycle according to the present invention will be described below with reference to FIGS. 1 and 2.
第１図は空気調和機の冷凍サイクル図を示し、同図に
おいて符号１は圧縮機、２は蓄熱器、４は利用側の熱交
換器（凝縮器）例えば室内熱交換器、７は減圧装置、８
は熱源側の熱交換器（蒸発器）例えば室外熱交換器であ
る。FIG. 1 shows a refrigeration cycle diagram of an air conditioner in which reference numeral 1 is a compressor, 2 is a heat storage device, 4 is a heat exchanger (condenser) on the use side, for example, an indoor heat exchanger, and 7 is a decompression device. , 8
Is a heat exchanger (evaporator) on the heat source side, for example, an outdoor heat exchanger.
上記蓄熱器２は、その内部に蓄熱材2Bを充填したもの
からなり、本実施例では、例えば蓄熱槽2A内にパラフィ
ン115°（融点45℃）が充填されており、この蓄熱器２
は圧縮機１で圧縮されて高温高圧となった冷媒の熱を冷
媒配管2Aより受容して蓄熱しておくものであり、冷凍サ
イクル上高い温度で蓄熱できるものである。The heat storage unit 2 is formed by filling the inside with a heat storage material 2B. In this embodiment, for example, the heat storage tank 2A is filled with paraffin 115 ° (melting point 45 ° C.).
Is for receiving the heat of the refrigerant that has been compressed by the compressor 1 and has become high temperature and high pressure from the refrigerant pipe 2A to store the heat, and can store the heat at a high temperature in the refrigeration cycle.
また、上記室内熱交換器４と室外熱交換器８との間に
はバイパス管Ｂが設けられ、このバイパス管の一端は室
内熱交換器４と減圧装置７との間に接続され、他端は蓄
熱器２を介して上記減圧装置７と室外熱交換器８との間
に接続されている。そして、上記バイパス管Ｂには開閉
弁５、減圧装置６及び冷媒配管2Dが介装されている。Further, a bypass pipe B is provided between the indoor heat exchanger 4 and the outdoor heat exchanger 8, one end of the bypass pipe is connected between the indoor heat exchanger 4 and the pressure reducing device 7, and the other end. Is connected between the pressure reducing device 7 and the outdoor heat exchanger 8 via the heat storage device 2. The bypass pipe B is provided with an opening / closing valve 5, a pressure reducing device 6 and a refrigerant pipe 2D.
また、上記室内外熱交換器4,8は、それぞれ室内ファ
ン（凝縮器用ファン）12及び室外ファン（蒸発器用ファ
ン）13を備えており、蓄熱器２はその内部温度を検出す
る蓄熱温度センサ（たとえば、サーミスタ等）10を備え
ている。そして、蓄熱温度センサ10の検出値に基づいて
上記室外ファン13がON,OFF制御されるようになってい
る。The indoor and outdoor heat exchangers 4 and 8 each include an indoor fan (condenser fan) 12 and an outdoor fan (evaporator fan) 13, and the heat accumulator 2 detects a heat storage temperature sensor ( For example, a thermistor, etc.) 10. The outdoor fan 13 is ON / OFF-controlled based on the detected value of the heat storage temperature sensor 10.
次に前述のように構成された本発明に係る空気調和機
の冷凍サイクルの動作について説明する。Next, the operation of the refrigeration cycle of the air conditioner according to the present invention configured as described above will be described.
先ず、各モードにおける室内ファン12、室外ファン1
3、開閉弁５及び減圧装置７の各状態を表わした次表に
もとずき各動作を説明する。なお、開閉弁５、減圧装置
７、室内ファン12及び室外ファン13は制御装置20により
次表に示すように制御され、使用者が図示しない運転選
択スイッチを蓄熱運転か通常運転かを設定する。又、減
圧装置７は自動温度膨脹弁でも良いが、望ましくは特開
昭59−170653号公報に記載されている電動式膨脹弁が良
い。そして減圧装置７は温度センサ17,18により蒸発温
度と圧縮機１の吸込み温度の差が一定になるようないわ
ゆるスーパーヒート制御を行なうことができる。First, indoor fan 12 and outdoor fan 1 in each mode
3, each operation will be described based on the following table showing each state of the on-off valve 5 and the pressure reducing device 7. The on-off valve 5, the pressure reducing device 7, the indoor fan 12, and the outdoor fan 13 are controlled by the control device 20 as shown in the following table, and the user sets the operation selection switch (not shown) to the heat storage operation or the normal operation. Further, the pressure reducing device 7 may be an automatic temperature expansion valve, but preferably an electric expansion valve described in JP-A-59-170653. The decompression device 7 can perform so-called superheat control so that the difference between the evaporation temperature and the suction temperature of the compressor 1 becomes constant by the temperature sensors 17 and 18.
（１）蓄熱運転 使用者が図示しない運転選択スイッチを蓄熱運転に設
定すると、運転モードは、「蓄熱」となる。即ち圧縮機
１で加圧された冷媒は蓄熱器２を介して室内熱交換器
４、減圧装置７、室外熱交換器８を経て圧縮機１に還流
される。この循環の間に、蓄熱器２に蓄熱され、本実施
例においては蓄熱温度センサ10がたとえば50℃以下にな
ると圧縮機１をONし、55℃以上になると圧縮機１をOFF
する制御を行なう。 (1) Heat storage operation When the user sets an operation selection switch (not shown) to heat storage operation, the operation mode becomes "heat storage". That is, the refrigerant pressurized in the compressor 1 is returned to the compressor 1 via the heat storage device 2, the indoor heat exchanger 4, the pressure reducing device 7, and the outdoor heat exchanger 8. During this circulation, heat is stored in the heat storage device 2, and in this embodiment, when the heat storage temperature sensor 10 falls below 50 ° C., the compressor 1 is turned on, and above 55 ° C., the compressor 1 is turned off.
Control.
（２）通常運転 使用者が図示しない運転選択スイッチにより通常運転
を設定すると、蓄熱槽2A内の温度により自動的に蓄熱利
用暖房モードあるいは暖房蓄熱モードが選択される。(2) Normal operation When the user sets normal operation with an operation selection switch (not shown), the heat storage utilization heating mode or the heating heat storage mode is automatically selected according to the temperature in the heat storage tank 2A.
本実施例では例えば、蓄熱槽2A内の温度が10℃以上ある
場合は、蓄熱材2Bの熱量を利用して高暖房能力が出せる
「蓄熱利用暖房モード」が開始される。逆に蓄熱槽2Aの
温度が10℃以下の場合蓄熱利用の高暖房能力運転ができ
ないので「暖房蓄熱モード」の運転となる。In this embodiment, for example, when the temperature in the heat storage tank 2A is 10 ° C. or higher, the “heat storage utilization heating mode” is started in which the high heating capacity can be obtained by using the heat quantity of the heat storage material 2B. On the contrary, when the temperature of the heat storage tank 2A is 10 ° C. or less, the high heating capacity operation using heat storage cannot be performed, and thus the operation is the “heating heat storage mode”.
まず、最初に蓄熱利用暖房運転に入った場合について
説明する。First, the case where the heating operation using heat storage is first started will be described.
（２）−蓄熱利用暖房（暖房立上り）モード 暖房運転を必要としない時に蓄熱器２に蓄熱しておき
その熱を利用して、暖房立上り時に大きな出力で一気に
暖房を行う運転である。即ち、圧縮機１で加圧された冷
媒は蓄熱器２を介して室内熱交換器４を通り、ここで、
熱交換が行われる。そして、室内熱交換器４を経て液化
した冷媒は、開閉弁５、減圧装置６を経て蓄熱器２で熱
交換が行われ加熱される。蓄熱器２で加熱された冷媒は
室外熱交換器８を介して圧縮機１に還流する。ここで、
蓄熱材2Bの温度が高いため、冷媒はここで蒸発する。そ
して、冷媒の蒸発温度は高くなるため圧縮機１の吸込圧
力も高くなり冷媒の循環量が増大するため、室内熱交換
器４において大きな出力で一気に暖房を行うことができ
る。このとき、蓄熱器２を出た冷媒の温度が室外熱交換
器８の周囲外気より高い場合には、室外熱交換器８にお
いて外気吸熱をしないで逆に外気放熱して暖房能力が低
下する恐れがある。そこで、第３図に示されるように蓄
熱槽2A温度を蓄熱温度センサ10により検出して室外ファ
ン13をON・OFF制御し、室外熱交換器８における強制対
流による放熱を避け、自然対流による放熱のみとし、放
熱を最小限に押さえる。(2) -Heat Storage Utilization Heating (Heating Rising) Mode This is an operation in which heat is stored in the heat storage device 2 when heating operation is not required and the heat is used to perform heating at once with a large output at the time of heating rising. That is, the refrigerant pressurized by the compressor 1 passes through the indoor heat exchanger 4 via the heat storage device 2, where
Heat exchange takes place. The refrigerant liquefied through the indoor heat exchanger 4 is heated by the heat storage 2 through the on-off valve 5 and the pressure reducing device 6 for heat exchange. The refrigerant heated by the heat storage device 2 returns to the compressor 1 via the outdoor heat exchanger 8. here,
Since the temperature of the heat storage material 2B is high, the refrigerant evaporates here. Since the evaporation temperature of the refrigerant becomes high, the suction pressure of the compressor 1 also becomes high and the circulation amount of the refrigerant increases, so that the indoor heat exchanger 4 can perform heating at once with a large output. At this time, when the temperature of the refrigerant discharged from the heat storage device 2 is higher than the ambient air of the outdoor heat exchanger 8, the outdoor heat exchanger 8 does not absorb the external air and radiates the outdoor air to the contrary and the heating capacity may be deteriorated. There is. Therefore, as shown in FIG. 3, the temperature of the heat storage tank 2A is detected by the heat storage temperature sensor 10 to control the outdoor fan 13 to be turned on and off to avoid heat radiation by forced convection in the outdoor heat exchanger 8 and heat radiation by natural convection. And keep heat dissipation to a minimum.
すなわち、第２図において蓄熱センサ温度をTHCと
し、室外熱交換器８における放熱開始温度を初期設定温
度としてT0とする。ここで、T0はたとえば15℃とする。
運転開始されると、THCとT0とを比較する（ステップ
）。そして、THC≧T0であれば室外ファン13をOFFし
（ステップ）、THC＜T0であれば室外ファン13をONす
る（ステップ）。That is, in FIG. 2, the heat storage sensor temperature is T HC , and the heat radiation start temperature in the outdoor heat exchanger 8 is T 0 as the initial set temperature. Here, T 0 is, eg, 15 ° C.
When the operation is started, and compares the T HC and T 0 (steps). Then, if T HC ≧ T 0 , the outdoor fan 13 is turned off (step), and if T HC <T 0 , the outdoor fan 13 is turned on (step).
しかして、蓄熱利用暖房モードと暖房・蓄熱モードと
の切換えは次表のように蓄熱センサ温度（THC）と設定
値（TP）との比較において行い、ここで、TPはたとえば
10℃とする。蓄熱利用暖房運転を続けると蓄熱槽2Aの温
度が低下し、たとえば2Aの温度がTP以下になると後述す
る「暖房蓄熱運転モード」（（２）−）に自動的に切
換わる。Then, switching between the heating mode using heat storage and the heating / heat storage mode is performed by comparing the heat storage sensor temperature (T HC ) with the set value (T P ) as shown in the following table, where T P is, for example,
Set to 10 ° C. When the heating operation using heat storage continues, the temperature of the heat storage tank 2A decreases, and when the temperature of 2A becomes T P or lower, for example, the mode is automatically switched to the "heating heat storage operation mode" ((2)-) described later.
（２）−暖房・蓄熱モード 暖房を継続するとともにその間に蓄熱する暖房・蓄熱
モードにおいては、圧縮機１で加圧された冷媒は蓄熱器
２を介して室内熱交換器４、減圧装置７、室外熱交換器
８を経て圧縮機１に還流される。このように暖房運転を
続けると、外気温が低い場合室外熱交換器８に霜がつ
く。このため除霜運転を行う必要がある。 (2) -Heating / Heat Storage Mode In the heating / heat storage mode in which heating is continued and heat is stored during the heating, the refrigerant pressurized by the compressor 1 passes through the heat storage 2 to the indoor heat exchanger 4, the decompression device 7, It is returned to the compressor 1 via the outdoor heat exchanger 8. When the heating operation is continued in this way, the outdoor heat exchanger 8 is frosted when the outside air temperature is low. Therefore, it is necessary to perform the defrosting operation.
なお、「蓄熱モード」と「暖房・蓄熱モード」との切
換えは次表のように室温（TIN）と室内サーモスタット
の設定値（TS）との比較により自動的に行ってもよい。The "heat storage mode" and the "heating / heat storage mode" may be automatically switched by comparing the room temperature (T IN ) with the indoor thermostat set value (T S ) as shown in the following table.
その場合、前述した（１）の蓄熱運転に入るが蓄熱運
転中TS＞TINの場合は暖房蓄熱運転に入る。その際さら
に立上りをよくする必要がある場合には蓄熱槽2Aの温度
が10℃以上であれば蓄熱利用運転に入ってもよい。In that case, the heat storage operation of (1) described above is entered, but if T S > T IN during heat storage operation, the heating heat storage operation is entered. At this time, if it is necessary to improve the start-up, the heat storage utilization operation may be started as long as the temperature of the heat storage tank 2A is 10 ° C or higher.
次に除霜運転モードについて説明する。 Next, the defrosting operation mode will be described.
（２）−除霜モード 室外熱交換器の除霜を行うモードにおいては、暖房蓄
熱運転中、室外熱交換器８の暖房側入口部に設けられた
温度センサ16の検出値が設定値（例えば−15℃）以下の
場合に除霜が開始される。なお、この場合、先に行った
除霜から所定時間（例えば40分）経過していることも除
霜開始条件となる。そして、温度センサ16の検出値が設
定値（たとえば10℃）以上のとき除霜が終了し前記した
暖房蓄熱運転となる。(2) -Defrosting Mode In the defrosting mode of the outdoor heat exchanger, the detected value of the temperature sensor 16 provided at the heating side inlet of the outdoor heat exchanger 8 is a set value (for example, during the heating heat storage operation). Defrosting is started when the temperature is lower than -15 ℃. In this case, the defrosting start condition is that a predetermined time (for example, 40 minutes) has elapsed from the previously performed defrosting. Then, when the detected value of the temperature sensor 16 is equal to or higher than the set value (for example, 10 ° C.), the defrosting is completed and the heating heat storage operation is started.
除霜モードの冷媒経路は、開閉弁５が開となるため、
蓄熱利用暖房モードと同一となり、圧縮機１、蓄熱器
２、室内熱交換器４、開閉弁５、減圧装置６、室外熱交
換器８、圧縮機１のループとなり、蓄熱器２の蓄熱を除
霜に有効に利用する。そして、除霜時には暖房を継続し
ながら除霜を行うことができる。Since the opening / closing valve 5 is opened in the refrigerant path in the defrosting mode,
It becomes the same as the heating mode using heat storage, becomes a loop of the compressor 1, the heat storage device 2, the indoor heat exchanger 4, the on-off valve 5, the pressure reducing device 6, the outdoor heat exchanger 8 and the compressor 1, and removes the heat storage of the heat storage device 2. Effectively used for frost. Then, during defrosting, defrosting can be performed while continuing heating.
第１図に示した実施例では暖房専用の空気調和機の冷
凍サイクルについて説明したが第３図に示すように暖・
冷房可能なヒートポンプ式空気調和機の冷凍サイクルに
も本発明は適用可能である。In the embodiment shown in FIG. 1, the refrigeration cycle of the air conditioner dedicated to heating has been described, but as shown in FIG.
The present invention is also applicable to a refrigeration cycle of a heat pump type air conditioner capable of cooling.
即ち、室内熱交換器４の近傍に温度センサ31,32を設
け、又、バイパス管Ｂに逆止弁11を設け、さらに蓄熱器
２と室内熱交換器４との間に四方弁３を介装することに
より、冷房サイクルが可能となる。第３図に示す実施例
では、冷房モード以外は前述した実施例と同様なサイク
ルとなるため、「冷房モード」のみ説明する。That is, the temperature sensors 31 and 32 are provided near the indoor heat exchanger 4, the check valve 11 is provided in the bypass pipe B, and the four-way valve 3 is interposed between the heat storage device 2 and the indoor heat exchanger 4. When equipped, a cooling cycle becomes possible. In the embodiment shown in FIG. 3, the cycle is the same as that of the above-mentioned embodiments except the cooling mode, so only the "cooling mode" will be described.
冷房モードにおいては、圧縮機１で加圧された冷媒は
蓄熱器２を介して四方弁３、室外熱交換器８、減圧装置
７、室内熱交換器４を経て圧縮機１に還流される。この
冷房運転の間にも蓄熱器２で蓄熱される。なお、開閉弁
５を閉としたが開閉弁５を開としてバイパス管Ｂ内の冷
媒を戻してもよい。 In the cooling mode, the refrigerant pressurized in the compressor 1 is returned to the compressor 1 via the heat storage device 2, the four-way valve 3, the outdoor heat exchanger 8, the pressure reducing device 7, and the indoor heat exchanger 4. During this cooling operation, heat is stored in the heat storage device 2. Although the opening / closing valve 5 is closed, the opening / closing valve 5 may be opened to return the refrigerant in the bypass pipe B.
以上の説明した第１図及び第３図に図示した実施例で
は、減圧装置７は特開昭59−170653号公報に記載されて
いる電動式膨脹弁としたが、減圧装置７を自動温度膨脹
弁として開閉弁21を、第４図（ａ）に図示するように構
成すれば減圧装置７へ流入する冷媒を完全に遮断でき
る。すなわち、第４図（ａ）では減圧装置７の直上流側
に開閉弁21を設け、開閉弁５が開放したときには開閉弁
21を閉塞する。なお、望ましくは完全に遮断する方が良
いが、自動温度膨脹弁22を第４図（ｂ）のように構成し
減圧装置７（22）を一部通過させてもよい。In the embodiment shown in FIGS. 1 and 3 described above, the pressure reducing device 7 is the electric expansion valve described in Japanese Patent Laid-Open No. 59-170653, but the pressure reducing device 7 is automatically expanded by temperature. If the on-off valve 21 is configured as shown in FIG. 4 (a) as a valve, the refrigerant flowing into the pressure reducing device 7 can be completely shut off. That is, in FIG. 4 (a), the opening / closing valve 21 is provided immediately upstream of the pressure reducing device 7, and when the opening / closing valve 5 is opened, the opening / closing valve 21 is opened.
Block 21. Although it is preferable to completely shut off the valve, the automatic temperature expansion valve 22 may be configured as shown in FIG. 4 (b) so that the pressure reducing device 7 (22) may partially pass through.
〔発明の効果〕 以上、実施例の説明から明らかなように本発明によれ
ば、圧縮機により加圧された高温の冷媒を蓄熱器で熱交
換してこの蓄熱器に蓄熱しておき、冷凍サイクルの利用
側交換器（凝縮器）の立上り時に凝縮器を経て液化した
冷媒をバイパス管を介して蓄熱器に導き、ここで高温の
蓄熱材と熱交換するため蒸発温度が高くなり圧縮機の吸
込圧力が高くなり、冷凍サイクルの利用側熱交換器（凝
縮器）の立上り時に単位時間当り大きな出力を発揮でき
る。[Effects of the Invention] As is apparent from the description of the embodiments above, according to the present invention, the high temperature refrigerant pressurized by the compressor is heat-exchanged in the regenerator to store heat in the regenerator, and the freezing is performed. At the start-up of the use side exchanger (condenser) of the cycle, the liquefied refrigerant that has passed through the condenser is guided to the heat storage device via the bypass pipe, where it exchanges heat with the high-temperature heat storage material, and the evaporation temperature rises and the compressor The suction pressure becomes high, and a large output per unit time can be exhibited when the heat exchanger (condenser) on the use side of the refrigeration cycle starts up.
また、本発明によれば、バイパス管は蒸発器と減圧装
置との間の低圧側に接続されているため、バイパス管内
の液溜りを防止できる。Further, according to the present invention, since the bypass pipe is connected to the low pressure side between the evaporator and the pressure reducing device, it is possible to prevent the liquid pool in the bypass pipe.
さらに、本発明によれば、予め設定した蓄熱温度レベ
ルにより、蒸発器用ファンをON・OFF制御するため、蓄
熱利用運転時の放熱損失を防止できる。Furthermore, according to the present invention, since the evaporator fan is ON / OFF controlled by the preset heat storage temperature level, it is possible to prevent heat radiation loss during heat storage utilization operation.
第１図は本発明に係る冷凍サイクルの一実施例を示す
図、第２図は同冷凍サイクルのフローチャートを示す
図、第３図は本発明の他の実施例を示す図、第４図
（ａ），（ｂ）は本発明の変形例を示す図、第５図は従
来の冷凍サイクルを示す図である。 １…圧縮機、２…蓄熱器、３…四方弁、４…室内熱交換
器、５…開閉弁、6,7…減圧装置、８…室外熱交換器、1
0…温度センサ、12…室内ファン、13…室外ファン。FIG. 1 is a diagram showing an embodiment of a refrigeration cycle according to the present invention, FIG. 2 is a diagram showing a flow chart of the refrigeration cycle, FIG. 3 is a diagram showing another embodiment of the present invention, and FIG. (a), (b) is a figure which shows the modification of this invention, and FIG. 5 is a figure which shows the conventional refrigeration cycle. 1 ... Compressor, 2 ... Heat storage device, 3 ... Four-way valve, 4 ... Indoor heat exchanger, 5 ... Open / close valve, 6,7 ... Decompression device, 8 ... Outdoor heat exchanger, 1
0 ... Temperature sensor, 12 ... Indoor fan, 13 ... Outdoor fan.
Claims (1)
管路で接続してなる冷凍サイクルにおいて、上記圧縮機
の吐出側と凝縮器との間に蓄熱器を介装するとともに、
バイパス管の一端を上記凝縮器と減圧装置との間に接続
し他端を上記蓄熱器を介して上記減圧装置と蒸発器との
間に接続するように設け、さらに上記蓄熱器内に蓄熱温
度センサを設け、この蓄熱温度センサの検出値にもとず
き蒸発器用ファンをON・OFF制御するようにしたことを
特徴とする冷凍サイクル。1. A refrigeration cycle in which a compressor, a condenser, a pressure reducing device, and an evaporator are sequentially connected by a pipe line, and a heat storage device is provided between the discharge side of the compressor and the condenser.
One end of the bypass pipe is provided so as to be connected between the condenser and the pressure reducing device, and the other end is provided so as to be connected between the pressure reducing device and the evaporator via the heat storage device, and the heat storage temperature is further stored in the heat storage device. A refrigeration cycle characterized in that a sensor is provided, and the evaporator fan is controlled to be turned on and off based on the detected value of the heat storage temperature sensor.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61163453A JPH081340B2 (en) | 1986-07-11 | 1986-07-11 | Refrigeration cycle |
| US07/071,663 US4833893A (en) | 1986-07-11 | 1987-07-09 | Refrigerating system incorporating a heat accumulator and method of operating the same |
| KR1019870007471A KR920009307B1 (en) | 1986-07-11 | 1987-07-11 | Refrigerating cycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61163453A JPH081340B2 (en) | 1986-07-11 | 1986-07-11 | Refrigeration cycle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6321449A JPS6321449A (en) | 1988-01-29 |
| JPH081340B2 true JPH081340B2 (en) | 1996-01-10 |
Family
ID=15774170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61163453A Expired - Lifetime JPH081340B2 (en) | 1986-07-11 | 1986-07-11 | Refrigeration cycle |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH081340B2 (en) |
| KR (1) | KR920009307B1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130027460A (en) * | 2010-03-01 | 2013-03-15 | 파나소닉 주식회사 | Refrigeration cycle device |
| JP5108923B2 (en) * | 2010-09-09 | 2012-12-26 | パナソニック株式会社 | Air conditioner |
-
1986
- 1986-07-11 JP JP61163453A patent/JPH081340B2/en not_active Expired - Lifetime
-
1987
- 1987-07-11 KR KR1019870007471A patent/KR920009307B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6321449A (en) | 1988-01-29 |
| KR880001987A (en) | 1988-04-28 |
| KR920009307B1 (en) | 1992-10-15 |
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