JPH03260561A - Air conditioner - Google Patents
Air conditionerInfo
- Publication number
- JPH03260561A JPH03260561A JP5636390A JP5636390A JPH03260561A JP H03260561 A JPH03260561 A JP H03260561A JP 5636390 A JP5636390 A JP 5636390A JP 5636390 A JP5636390 A JP 5636390A JP H03260561 A JPH03260561 A JP H03260561A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- air conditioner
- heating
- switching
- valve
- 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
- 238000010438 heat treatment Methods 0.000 claims abstract description 48
- 238000001816 cooling Methods 0.000 claims abstract description 37
- 238000001514 detection method Methods 0.000 claims description 17
- 238000005057 refrigeration Methods 0.000 claims description 17
- 238000004378 air conditioning Methods 0.000 claims description 5
- 239000003507 refrigerant Substances 0.000 abstract description 20
- 239000007788 liquid Substances 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、冷暖同時運転可能な空気調和機における、冷
暖房切換用開閉弁の切換時に発生する冷媒流動音の低減
に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to the reduction of refrigerant flow noise generated when switching an on-off valve for switching between cooling and heating in an air conditioner capable of simultaneous cooling and heating operation.
従来の空気調和機は、圧縮機、凝縮器、減圧装置、蒸発
器により構成される一組の冷凍サイクルでは、同時に運
転する室内機の台数に関わらず、どの室内機も全数冷房
（含除湿）あるいは、全数暖房のいずれか一方の運転し
かできなかった。Conventional air conditioners use a refrigeration cycle consisting of a compressor, condenser, pressure reducing device, and evaporator, and all indoor units are completely cooled (including dehumidification) regardless of the number of indoor units operating simultaneously. Alternatively, only one of the heating systems could be operated.
また、冷暖同時運転可能な空気調和機においては、冷房
用、暖房用の開閉弁をそれぞれの一台の室内機ごとに備
えることによって、−組の冷凍サイクル内で室内機ごと
の、冷房、暖房運転の選択を可能にしている。In addition, in an air conditioner capable of simultaneous cooling and heating operations, by providing each indoor unit with an on-off valve for cooling and heating, it is possible to It allows you to choose your driving style.
他に、特開昭５１−８７７６５号のように、電磁弁その
ものの金属衝撃音を低下させるために励磁電流をおくら
せるなどの方法もとられているが、冷媒流動音の低減と
は目的を異にしている。In addition, as in Japanese Patent Application Laid-Open No. 51-87765, methods such as sending excitation current to reduce the metal impact noise of the solenoid valve itself have been taken, but the purpose is not to reduce the refrigerant flow noise. It's different.
上記従来技術は、冷房、暖房の同時運転を一組の冷凍サ
イクル内で可能にしたが、その切換時の切換用開閉弁の
前後で生じる圧力差によって発生する騒音防止について
は配慮されておらず、冷房運転から暖房運転への切換時
、あるいは暖房運転から冷房運転への切換時、すなわち
冷暖房切換用開閉弁の作動時に、冷媒流動音が発生する
という問題があった。The above conventional technology enables simultaneous operation of cooling and heating within a set of refrigeration cycles, but does not take into account the prevention of noise caused by the pressure difference that occurs before and after the switching valve at the time of switching. There has been a problem in that refrigerant flow noise is generated when switching from cooling operation to heating operation, or when switching from heating operation to cooling operation, that is, when the cooling/heating switching switching valve is operated.
本発明の目的は、冷暖房切換用開閉弁の開閉弁時に発生
する冷媒流動音を低減することにある。SUMMARY OF THE INVENTION An object of the present invention is to reduce refrigerant flow noise that occurs when an on-off valve for switching between air conditioning and heating is opened and closed.
上記目的を達成するために、冷凍サイクル中の圧力検知
装置により、圧縮機の前後の圧力差を検知し、あらかじ
め設定′した基準圧力差と検知圧力差との比較を行い、
冷暖房切換用開閉弁と、室内熱交換器用減圧装置の開閉
時期をずらすことを決定することとしたものである。In order to achieve the above objective, a pressure detection device in the refrigeration cycle detects the pressure difference before and after the compressor, and compares the detected pressure difference with a preset reference pressure difference.
It has been decided to shift the opening and closing timings of the air conditioning/heating switching valve and the indoor heat exchanger pressure reducing device.
また、冷凍サイクル中の冷暖切換用開閉弁の前後圧力と
、室内熱交換器用減圧装置の前後圧力とを検知して、こ
の圧力差により、該切換用開閉弁と該減圧装置との開閉
時期を決定することとしたものである。In addition, the pressure before and after the cooling/heating switching on-off valve during the refrigeration cycle and the pressure before and after the pressure reducing device for the indoor heat exchanger are detected, and based on this pressure difference, the opening/closing timing of the switching on/off valve and the pressure reducing device is determined. This has been decided.
該切換用開閉弁の前後圧力差を低減させるために、減圧
装置を新たに並設したものである。In order to reduce the pressure difference between the front and rear switching valves, a pressure reducing device is newly installed in parallel.
さらに、該並設減圧装置に開閉弁を設け、圧力検知装置
による判断で、該並設減圧装置を未使用とすることがで
きる様にしたものである。Further, the parallel pressure reducing device is provided with an on-off valve so that the parallel pressure reducing device can be left unused as determined by the pressure detection device.
さらに、圧力検知用装置の検出誤差を室内機の設置され
る状況や、冷凍サイクルの運転状態から補正を加え、該
圧力検知用装置の正確な情報により該切換開閉弁と、該
減圧装置の開閉の要否を判断することとしたものである
。Furthermore, the detection error of the pressure detection device is corrected based on the installation situation of the indoor unit and the operating condition of the refrigeration cycle, and the accurate information of the pressure detection device is used to open and close the switching valve and the pressure reducing device. The decision was made to determine whether or not it is necessary.
また、該切換用開閉弁と該減圧装置の開閉時期にあわせ
、室内機送風装置を運転し、該切換用開閉弁の前後圧力
差を低減したものである。Further, the indoor unit blower is operated in accordance with the opening/closing timing of the switching on-off valve and the pressure reducing device to reduce the pressure difference between the front and back of the switching on-off valve.
冷暖房切換用開閉弁前後の圧力差があらかじめ与えられ
る基準圧力差より大の場合、該開閉弁の開閉と、室内機
熱交換器用減圧装置の開路時期は圧力差の大小により、
大きければ大きなずれを、小さければ小さなずれを生ず
るように動作する。それによって、該開閉弁前後の圧力
差は小となる。If the pressure difference before and after the air conditioning/heating switch valve is larger than a predetermined reference pressure difference, the opening/closing timing of the valve and the opening timing of the pressure reducing device for the indoor heat exchanger will depend on the magnitude of the pressure difference.
If it is large, it operates to produce a large deviation, and if it is small, it operates to produce a small deviation. Thereby, the pressure difference before and after the on-off valve becomes small.
また、該切換用開閉弁を並設した減圧装置においても、
減圧装置が常に開路することにより、該開閉弁前後の圧
力差は小となる。また、減圧装置の前後に開閉弁を設置
することにより、該圧力差が大きく、圧力差の低減が必
要と判断される時にのみ、並設した減圧装置を用いた冷
凍サイクルとすることができる。In addition, in a pressure reducing device in which switching valves are installed in parallel,
Since the pressure reducing device is always open, the pressure difference before and after the on-off valve becomes small. Furthermore, by installing on-off valves before and after the pressure reducing device, it is possible to create a refrigeration cycle using pressure reducing devices installed in parallel only when the pressure difference is large and it is determined that reduction of the pressure difference is necessary.
冷凍サイクル中の圧縮機の前後に圧力検知用装置を設置
した場合、該切換用開閉弁と、該室内機熱交換器用減圧
装置の前後圧力の検知に際して、必ずしも正確に検出し
ているとは限らない。そこで冷凍サイクルの配管長、温
度、運転周波数などの運転状況の変化などの情報を与え
、検出したデータに補正を行なうようになるので、該開
閉弁と該開閉弁と該減圧装置が誤動作することがない。If a pressure detection device is installed before and after the compressor during the refrigeration cycle, it may not necessarily be possible to accurately detect the pressure before and after the switching valve and the pressure reducing device for the indoor unit heat exchanger. do not have. Therefore, information such as changes in operating conditions such as piping length, temperature, and operating frequency of the refrigeration cycle is given and the detected data is corrected to prevent malfunctions of the on-off valve, the on-off valve, and the pressure reducing device. There is no.
室内機の送風装置は、該切換用開閉弁と該減圧装置の間
の圧力を変化するように動作する。The blower device of the indoor unit operates to change the pressure between the switching valve and the pressure reducing device.
これにより、該圧力が低減することによって、該切換用
開閉弁と該減圧装置との間の圧力差は減少する。This reduces the pressure, thereby reducing the pressure difference between the switching on-off valve and the pressure reducing device.
以下本発明の一実施例を第１図〜第２図により説明する
。An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.
第１図は室外機１、室内機２ａ、２ｂを組合せた暖房切
換用電磁弁１１１２、冷房切換用電磁弁２１．２２、お
よび室内機熱交換器３ａ、３ｂ、室内機用減圧装置４ａ
、４ｂを含む冷凍サイクルを示している。４０はレシー
バ−１４１はバイパス膨脹弁、４２．４３は室外機用膨
脹弁、４４は圧縮機、４５はアキュムレータ、４６．４
７は室外熱交換器、４８は逆止弁、４９．５０は四方弁
、５１はファンである。室内機２ａにおいて冷房運転し
ている場合、冷媒は減圧装置４ａから熱交換器３ａを通
過し、冷房切換用電磁弁２ａに流れる。この場合、冷媒
の圧力は、減圧装置４ａまでは液配管圧力Ｐｔ、である
が、減圧装置４ａと冷房切換用電磁弁２１との間の熱交
換器３ａの圧力Ｐｘは、吸入側配管圧力Ｐｓに近い値と
なる。Figure 1 shows a heating switching solenoid valve 1112, a cooling switching solenoid valve 21, 22, an indoor unit heat exchanger 3a, 3b, and an indoor unit pressure reducing device 4a, which combine an outdoor unit 1, indoor units 2a and 2b.
, 4b. 40 is a receiver, 141 is a bypass expansion valve, 42.43 is an outdoor unit expansion valve, 44 is a compressor, 45 is an accumulator, 46.4
7 is an outdoor heat exchanger, 48 is a check valve, 49.50 is a four-way valve, and 51 is a fan. When the indoor unit 2a is in a cooling operation, the refrigerant passes through the heat exchanger 3a from the pressure reducing device 4a, and flows to the cooling switching solenoid valve 2a. In this case, the pressure of the refrigerant up to the pressure reducing device 4a is the liquid pipe pressure Pt, but the pressure Px of the heat exchanger 3a between the pressure reducing device 4a and the cooling switching solenoid valve 21 is the suction side pipe pressure Ps. The value is close to .
この状態から、室内機２ａにおいて暖房運転に運転を切
換える場合、まず、高圧側と低圧側の圧力センサ５の測
定値から得た圧力差と、冷媒流動音の発生が予測される
圧力差を設定値とし、これを比較する。比較した結果、
圧力差が設定値よりも大きい場合には、冷房切換用電磁
弁２１を閉弁する。ここでは、室内機熱交換器３ａ内の
圧力ＰｘはＰｓである。しかし続いて室内機用減圧装置
４ａを開路すると液冷媒の流入により圧力ＰｘはＰＬに
等しくなる。さらに、暖房切換用電磁弁１１を開弁する
とガス冷媒が圧力Ｐｄで流れ込み、室内機熱交換器３ａ
内の圧力ＰｘはＰｄに等しくなる。When switching the operation to heating operation in the indoor unit 2a from this state, first set the pressure difference obtained from the measured values of the pressure sensors 5 on the high pressure side and the low pressure side and the pressure difference at which refrigerant flow noise is predicted to occur. value and compare it. As a result of the comparison,
When the pressure difference is larger than the set value, the cooling switching solenoid valve 21 is closed. Here, the pressure Px inside the indoor unit heat exchanger 3a is Ps. However, when the indoor unit pressure reducing device 4a is subsequently opened, the pressure Px becomes equal to PL due to the inflow of liquid refrigerant. Furthermore, when the heating switching solenoid valve 11 is opened, the gas refrigerant flows into the indoor unit heat exchanger 3a at a pressure Pd.
The pressure inside Px becomes equal to Pd.
高圧側と低圧側の圧力センサ５の測定値と、先の設定値
との比較において、測定した圧力差が小さく冷媒流動音
の発生が予想されない場合には上記の場合と同様に開閉
時期をずらす制御を行ってもよいが、冷房切換用電磁弁
２１の閉弁、室内機用減圧装置４ａの開路、暖房切換用
電磁弁１１の開弁を各々の開閉時期で動作させてもかま
わない。When comparing the measured values of the pressure sensors 5 on the high pressure side and the low pressure side with the previously set values, if the measured pressure difference is small and generation of refrigerant flow noise is not expected, the opening/closing timing is shifted in the same way as in the above case. Although the control may be performed, the closing of the cooling switching solenoid valve 21, the opening of the indoor unit pressure reducing device 4a, and the opening of the heating switching solenoid valve 11 may be operated at respective opening and closing timings.
第３図には、上記開閉時期をずらす制御を行なう場合の
各電磁弁・減圧装置の動作の様子と、室内熱交換器３ａ
の圧力Ｐｘの変化を示したものである。この様に、熱交
換器圧力Ｐｘは、Ｐｓ−＝Ｐｄへ急激に変化するのでは
なく、Ｐｓ−４ＰＬ→Ｐｄと段階的に変化するため冷媒
流動音の発生を低減することができる。また、前述の第
１図において、室内熱交換器３ｂで暖房運転している状
態から冷房運転に運転を切換える場合には、まず、暖房
切換用電磁弁１２、および室内機用減圧装置４ｂを閉弁
する。この直後熱交換器３ｂの圧力Ｐｘ＝Ｐｄであるが
、ここで室内機送風装置６の風量あるいは風速を増加さ
せる。Figure 3 shows the operation of each solenoid valve/pressure reducing device when controlling the opening/closing timing described above, and the indoor heat exchanger 3a.
It shows the change in pressure Px of . In this way, the heat exchanger pressure Px does not change abruptly to Ps-=Pd, but changes stepwise from Ps-4PL to Pd, so that the generation of refrigerant flow noise can be reduced. In addition, in FIG. 1 described above, when switching the operation from heating operation to cooling operation with the indoor heat exchanger 3b, first close the heating switching solenoid valve 12 and the indoor unit pressure reducing device 4b. speak. Immediately after this, the pressure of the heat exchanger 3b is Px=Pd, but the air volume or air speed of the indoor unit blower 6 is increased.
すなわち熱交換器３ｂの圧力Ｐｘは、送風装置６の風量
切換により熱交換器３ｂのガス冷媒の凝縮により、高圧
圧力Ｐｄよりもむしろ低圧圧力に近い圧力となる。そこ
で圧力検知センサにより圧力差を検知するか、または検
知しないで充分に時間をおくか、した後減圧装置４ｂを
開路し、次に、冷房切換用電磁弁２２を開弁する。That is, the pressure Px of the heat exchanger 3b becomes closer to the low pressure than the high pressure Pd due to the condensation of the gas refrigerant in the heat exchanger 3b by changing the air volume of the blower 6. Therefore, either the pressure difference is detected by the pressure detection sensor or a sufficient time is left without detection, and then the pressure reducing device 4b is opened, and then the cooling switching solenoid valve 22 is opened.
本実施例によれば、暖房運転から冷房運転に切換える操
作をした時も、前述の実施例と同様に、冷房切換用電磁
弁の前後圧力差を小さくすることができる。According to this embodiment, even when an operation is performed to switch from heating operation to cooling operation, the pressure difference between the front and rear sides of the cooling switching solenoid valve can be reduced, similarly to the above-described embodiment.
第４図では、暖房切換用電磁弁１の前後の冷凍サイクル
中に冷暖房切換用減圧装置７を並設した実施例を示す。FIG. 4 shows an embodiment in which pressure reducing devices 7 for switching between cooling and heating are installed in parallel in the refrigeration cycle before and after the electromagnetic valve 1 for switching between heating and heating.
ここでは、減圧装置４の開路により、熱交換器３の圧力
ＰＸ＝ＰＬになった後、暖房切換用減圧装置７を開路す
ることにより、第１図、第３図の例に示したのと同様に
、Ｐｘ（＝ＰＬ）→Ｐｄとすることができる。Here, by opening the pressure reducing device 4, the pressure of the heat exchanger 3 becomes PX=PL, and then by opening the heating switching pressure reducing device 7, the pressure reducing device 4 is opened. Similarly, it is possible to set Px (=PL)→Pd.
第４図において、冷暖房切換用減圧装置７を冷房切換用
電磁弁２１に並設しても、同様にして、Ｐｘ→Ｐｓとす
ることができる。In FIG. 4, even if the pressure reducing device 7 for switching between cooling and heating is arranged in parallel with the electromagnetic valve 21 for switching between cooling and heating, Px→Ps can be changed in the same way.
第５図では、第４図に示した冷暖房切換用減圧装置７に
直列に、切換用電磁弁８を設置した例を示す。ここでは
、冷暖房切換用減圧装置７の動作の必要があると判断さ
れる場合にのみ、切換用電磁弁８を開路させ、冷房切換
用電磁弁２１の前後の圧力差を低減することができる。FIG. 5 shows an example in which a switching solenoid valve 8 is installed in series with the cooling/heating switching pressure reducing device 7 shown in FIG. Here, only when it is determined that it is necessary to operate the cooling/heating switching switching solenoid valve 8, the pressure difference before and after the cooling switching solenoid valve 21 can be reduced.
第６図には、暖房切換用電磁弁１１に、冷暖房切換用減
圧装置７を並設した例を示す。FIG. 6 shows an example in which a pressure reducing device 7 for switching between cooling and heating is installed in parallel with the electromagnetic valve 11 for switching between heating and heating.
第７図には、室外機ｌより施設された冷媒配管主管１０
から、分岐管３０により室内機２が設置される例を示す
。ここでは分岐管３０が長いために、圧縮機１３の前後
で検出している圧力差と、暖房切換用電磁弁１１と、室
内機態交換機用減圧装置４ａの間の圧力差とが、異なる
可能性のある場合を示した。この場合、圧力検出用セン
サ５の設置場所により、圧力検出値の補正値を決定して
補正を行うことによって、配管長による圧力検出値の誤
差は補正できる。Figure 7 shows the main refrigerant pipe 10 installed from the outdoor unit l.
An example is shown in which the indoor unit 2 is installed by a branch pipe 30. Here, since the branch pipe 30 is long, the pressure difference detected before and after the compressor 13 may be different from the pressure difference between the heating switching solenoid valve 11 and the pressure reducing device 4a for the indoor unit exchanger. We have shown a case where there is a In this case, the error in the pressure detection value due to the piping length can be corrected by determining and correcting the correction value of the pressure detection value depending on the installation location of the pressure detection sensor 5.
温度変化による圧力検出用センサ５の検出誤差の補正や
圧縮機の運転周波数による冷媒流量変化を原因とする圧
力損失の補正、あるいはまた、室内機と室外機の設定場
所の高圧差による圧力損失の補正も同様に圧力検出値の
補正が可能となる。Correction of detection error of pressure detection sensor 5 due to temperature change, correction of pressure loss caused by change in refrigerant flow rate due to compressor operating frequency, or correction of pressure loss due to high pressure difference between the setting locations of the indoor unit and outdoor unit. Similarly, the pressure detection value can be corrected.
本発明によれば、冷暖同時運転可能な空気調和機におい
て、暖房切換用開閉弁の開弁直前の圧力差の低減ができ
るので、該開閉弁の開弁時の冷媒流動音の低減に効果が
ある。According to the present invention, in an air conditioner capable of simultaneous cooling and heating operations, it is possible to reduce the pressure difference immediately before the heating switching valve opens, so it is effective in reducing refrigerant flow noise when the heating switching valve is opened. be.
第１図は、本発明の一実施例の冷凍サイクル系統図の一
部分、第２図は動作フローチャートを示す。第３図は第
１図の構成要素の圧力相対値の時間変化を示した図、第
４図は、本発明の他の一実施例の冷凍サイクル系統図の
一部分である。第５図は、第４図の冷凍サイクル系統図
の一部分に減圧装置を設置したものである。第６図は第
４図の冷凍サイクル系統図の冷暖切換用減圧装置の取付
位置を高圧側とした冷凍サイクル系統図の一部分、第７
図は、室外機と室内機の間の配管施設例を示した図であ
る。
１・・・室外機 ２ａ、２ｂ・・・室内機 ３ａ、
３ｂ・・・室内機熱交換器 ４ａ、４ｂ・・・室内機
減圧装置 ５・・・圧力検知センサ ６・・・室内
機送風装置 ７・・・冷暖房切換用減圧装置８・・・
切換用電磁弁 １０・・・冷媒配管主管１１．１２・
・・暖房切換用電磁弁 １３・・・圧縮機 ２１．
２２・・・冷房切換用電磁弁 ３０・・・分岐管
贅ｊ図
電３図FIG. 1 shows a part of a refrigeration cycle system diagram according to an embodiment of the present invention, and FIG. 2 shows an operation flowchart. FIG. 3 is a diagram showing changes over time in the relative pressure values of the components shown in FIG. 1, and FIG. 4 is a part of a refrigeration cycle system diagram of another embodiment of the present invention. FIG. 5 shows a part of the refrigeration cycle diagram in FIG. 4 in which a pressure reducing device is installed. Figure 6 is a part of the refrigeration cycle system diagram shown in Figure 4, with the installation position of the pressure reducing device for cooling/heating switching on the high pressure side.
The figure is a diagram showing an example of a piping facility between an outdoor unit and an indoor unit. 1...Outdoor unit 2a, 2b...Indoor unit 3a,
3b... Indoor unit heat exchanger 4a, 4b... Indoor unit pressure reducing device 5... Pressure detection sensor 6... Indoor unit blower device 7... Air conditioning/heating switching switching pressure reducing device 8...
Switching solenoid valve 10...Refrigerant piping main pipe 11.12.
...Heating switching solenoid valve 13...Compressor 21.
22... Solenoid valve for cooling switching 30... Branch pipe diagram 3
Claims (1)
クル中の圧縮機の出入口の圧力の圧力差を検出し、この
差によって室内機の冷暖房切換用開閉弁と室内機熱交換
器用減圧装置の開路、閉路時期を決定することを特徴と
する空気調和機。 ２ 冷暖同時運転可能な空気調和機において、冷凍サイ
クル中の室内機の冷暖房切換用開閉弁の前後圧力と室内
熱交用減圧装置の前後圧力とを検出し、該開閉弁と、該
減圧装置の開閉時期をずらして、該開閉弁と該減圧装置
の間の圧力差を低減させることを特徴とする空気調和機
。 ３ 冷暖同時運転可能な空気調和機において、冷凍サイ
クル中の冷暖房切換用開閉弁の、前記冷凍サイクル中に
減圧装置を並設し、該開閉弁の前後の圧力差を低減させ
ることを特徴とする空気調和機。 ４ 特許請求の範囲第３項の空気調和機において、並設
した減圧装置の前後、あるいはどちらか一方に開閉弁を
設置し、該圧力差の低減を行なう場合と、行わない場合
とを切換えることを特徴とする空気調和機。 ５ 特許請求の範囲第１項の空気調和機において、圧縮
機の前後圧力と、圧力検知用装置の検出誤差を諸条件に
より補正のうえで、該切換開閉弁および該減圧装置の開
路閉路の要否を判断することを特徴とする空気調和機。 ６ 特許請求の範囲第２項の空気調和機において、切換
用開閉弁と減圧装置の開閉時期にあわせ、室内機の送風
装置の運転を行ない、冷凍サイクルの圧力バランスを変
化させ、冷暖房切換用開閉弁の前後圧力差を低減させる
ことを特徴とする空気調和機。[Scope of Claims] 1. In an air conditioner capable of simultaneous cooling and heating operation, a pressure difference between the inlet and outlet of the compressor during the refrigeration cycle is detected, and this difference is used to switch between the indoor unit's air conditioning and heating switching valve and the indoor unit's heat exchange. An air conditioner characterized by determining the opening and closing timing of a manual pressure reducing device. 2. In an air conditioner capable of simultaneous cooling and heating operation, the pressure before and after the switching valve for switching between heating and cooling of the indoor unit during the refrigeration cycle and the pressure before and after the pressure reducing device for indoor heat exchange are detected, and the pressure between the switching valve and the pressure reducing device is detected. An air conditioner characterized in that the pressure difference between the on-off valve and the pressure reducing device is reduced by shifting the opening/closing timing. 3. An air conditioner capable of simultaneous cooling and heating operation, characterized in that a pressure reducing device is installed in parallel to the cooling/heating switching opening/closing valve in the refrigeration cycle to reduce the pressure difference before and after the opening/closing valve. Air conditioner. 4. In the air conditioner set forth in claim 3, an on-off valve is installed before and after or on either side of the pressure reducing devices installed in parallel to switch between reducing the pressure difference and not reducing the pressure difference. An air conditioner featuring: 5. In the air conditioner set forth in claim 1, after correcting the front and rear pressure of the compressor and the detection error of the pressure detection device according to various conditions, the opening/closing requirements of the switching valve and the pressure reducing device are determined. An air conditioner characterized by determining whether or not the 6 In the air conditioner according to claim 2, the blower of the indoor unit is operated in accordance with the opening/closing timing of the switching valve and the pressure reducing device, and the pressure balance of the refrigeration cycle is changed, and the opening/closing for switching between cooling and heating is performed. An air conditioner characterized by reducing the pressure difference between the front and rear of the valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5636390A JP2954259B2 (en) | 1990-03-09 | 1990-03-09 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5636390A JP2954259B2 (en) | 1990-03-09 | 1990-03-09 | Air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03260561A true JPH03260561A (en) | 1991-11-20 |
| JP2954259B2 JP2954259B2 (en) | 1999-09-27 |
Family
ID=13025165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5636390A Expired - Fee Related JP2954259B2 (en) | 1990-03-09 | 1990-03-09 | Air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2954259B2 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04347466A (en) * | 1991-05-27 | 1992-12-02 | Mitsubishi Electric Corp | Air conditioner |
| JPH06159842A (en) * | 1992-11-26 | 1994-06-07 | Matsushita Refrig Co Ltd | Multiple room type and conditioner |
| JPH06207760A (en) * | 1993-01-11 | 1994-07-26 | Matsushita Refrig Co Ltd | Multi-chamber type air conditioner |
| JPH06300380A (en) * | 1993-04-20 | 1994-10-28 | Matsushita Refrig Co Ltd | Multi-room type air conditioner |
| WO2008047784A1 (en) * | 2006-10-17 | 2008-04-24 | Daikin Industries, Ltd. | Air conditioner |
| US7395674B2 (en) | 2004-07-01 | 2008-07-08 | Daikin Industries, Ltd. | Air conditioner |
| US7607317B2 (en) | 2004-08-04 | 2009-10-27 | Daikin Industries, Ltd. | Air conditioner with oil recovery function |
| WO2011071959A2 (en) * | 2009-12-08 | 2011-06-16 | Get Green Energy Corporation | Heat pump |
| WO2013136714A1 (en) * | 2012-03-14 | 2013-09-19 | ダイキン工業株式会社 | Humidity control equipment |
-
1990
- 1990-03-09 JP JP5636390A patent/JP2954259B2/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04347466A (en) * | 1991-05-27 | 1992-12-02 | Mitsubishi Electric Corp | Air conditioner |
| JPH06159842A (en) * | 1992-11-26 | 1994-06-07 | Matsushita Refrig Co Ltd | Multiple room type and conditioner |
| JPH06207760A (en) * | 1993-01-11 | 1994-07-26 | Matsushita Refrig Co Ltd | Multi-chamber type air conditioner |
| JPH06300380A (en) * | 1993-04-20 | 1994-10-28 | Matsushita Refrig Co Ltd | Multi-room type air conditioner |
| US7395674B2 (en) | 2004-07-01 | 2008-07-08 | Daikin Industries, Ltd. | Air conditioner |
| US7607317B2 (en) | 2004-08-04 | 2009-10-27 | Daikin Industries, Ltd. | Air conditioner with oil recovery function |
| WO2008047784A1 (en) * | 2006-10-17 | 2008-04-24 | Daikin Industries, Ltd. | Air conditioner |
| WO2011071959A2 (en) * | 2009-12-08 | 2011-06-16 | Get Green Energy Corporation | Heat pump |
| WO2011071959A3 (en) * | 2009-12-08 | 2011-11-03 | Get Green Energy Corporation | Heat pump |
| WO2013136714A1 (en) * | 2012-03-14 | 2013-09-19 | ダイキン工業株式会社 | Humidity control equipment |
| JP2013217633A (en) * | 2012-03-14 | 2013-10-24 | Daikin Industries Ltd | Humidity control equipment |
| CN104246382A (en) * | 2012-03-14 | 2014-12-24 | 大金工业株式会社 | Humidity controller |
| US9441844B2 (en) | 2012-03-14 | 2016-09-13 | Daikin Industries, Ltd. | Humidity controller |
| CN104246382B (en) * | 2012-03-14 | 2017-03-08 | 大金工业株式会社 | Humidity control device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2954259B2 (en) | 1999-09-27 |
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