JP3443442B2 - Air conditioner - Google Patents
Air conditionerInfo
- Publication number
- JP3443442B2 JP3443442B2 JP30372493A JP30372493A JP3443442B2 JP 3443442 B2 JP3443442 B2 JP 3443442B2 JP 30372493 A JP30372493 A JP 30372493A JP 30372493 A JP30372493 A JP 30372493A JP 3443442 B2 JP3443442 B2 JP 3443442B2
- Authority
- JP
- Japan
- Prior art keywords
- compressor
- heat exchanger
- frequency
- change speed
- temperature
- 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
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- Air Conditioning Control Device (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、例えば、冷凍サイクル
の所定の部位の温度に基づいて圧縮機の回転数上昇速度
を切換える空気調和機に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner that switches the speed of rotation of a compressor based on the temperature of a predetermined portion of a refrigeration cycle.
【０００２】[0002]
【従来の技術】例えば、スプリット型の空気調和機に
は、室温制御のために、圧縮機の回転数変化速度（Hz／
sec)を必要に応じて切換えるタイプのものがある。この
種の空気調和機においては、圧縮機の回転数（運転周波
数、運転能力）が複数の領域に分けられており、各領域
は目標の室温に対応している。さらに、これらの領域と
室温との対応は予めメモリに記憶されている。そして、
制御部が、目的の室温に応じた回転数領域をメモリから
読み出し、圧縮機の回転数変化速度を回転数領域に応じ
切換えて、圧縮機の回転数を調節する。2. Description of the Related Art For example, in a split type air conditioner, in order to control the room temperature, the rotational speed change speed of the compressor (Hz / Hz /
There is a type that switches sec) as needed. In this type of air conditioner, the rotation speed (operating frequency, operating capacity) of the compressor is divided into a plurality of regions, and each region corresponds to a target room temperature. Further, the correspondence between these areas and room temperature is stored in the memory in advance. And
The control unit reads the rotation speed region corresponding to the target room temperature from the memory and switches the rotation speed change speed of the compressor according to the rotation speed region to adjust the rotation speed of the compressor.
【０００３】[0003]
【発明が解決しようとする課題】ところで、上述のよう
な空気調和機には以下のような不具合がある。
１．回転数変化速度が一定で且つ速すぎると、圧縮機の
吐出温度が充分に上がらないまま圧縮機の回転数が急激
に上昇する。このため、圧縮機中の油が冷媒中に多量に
溶け込んだまま吐出され、圧縮機の油が大きく減少して
油面が低下する。そして、油面が過度に低下すると、油
量が不足する。油量の不足は圧縮機の故障の原因にな
る。
２．回転数変化速度を遅く設定すれば、圧縮機の吐出温
度を充分に高めることができる。このため、油と冷媒を
分離でき、油面の低下を防止できる。しかし、回転数変
化速度を単に遅くすると、室温制御に対する圧縮機回転
数の追随性が悪くなり、室温変動が大きくなったり、室
温が設定温度に安定するまでに多くの時間を要したりす
る。本発明の目的とするところは、圧縮機中の油の過度
な吐出を防止するとともに、室温制御に対する追随性の
優れた空気調和機を提供することにある。The air conditioner as described above has the following problems. 1. If the rotational speed change speed is constant and too fast, the rotational speed of the compressor rises rapidly without the discharge temperature of the compressor rising sufficiently. Therefore, the oil in the compressor is discharged while being melted in the refrigerant in a large amount, and the oil in the compressor is greatly reduced to lower the oil level. And when the oil level is excessively lowered, the amount of oil is insufficient. Insufficient amount of oil causes breakdown of the compressor. 2. The discharge temperature of the compressor can be sufficiently increased by setting the rotational speed changing speed to be slow. For this reason, the oil and the refrigerant can be separated, and the deterioration of the oil level can be prevented. However, if the rotation speed change speed is simply slowed down, the followability of the compressor rotation speed to the room temperature control becomes poor, and room temperature fluctuation becomes large, or it takes a long time for the room temperature to stabilize at the set temperature. An object of the present invention is to provide an air conditioner that prevents excessive discharge of oil in a compressor and has excellent followability to room temperature control.
【０００４】[0004]
【課題を解決するための手段および作用】上記目的を達
成するために本発明は、圧縮機、四方弁、室外熱交換
器、室内熱交換器、及び、減圧器を順次配管接続してな
り室外熱交換器と室内熱交換器のうちのいずれか一方が
選択的に冷媒の凝縮器として利用されるヒ−トポンプ式
の冷凍サイクルと、圧縮機の吐出温度を検出する吐出温
度センサと、凝縮器の温度を検出する凝縮温度センサ
と、圧縮機の所望の回転周波数領域に応じて圧縮機の周
波数変化速度を設定する制御手段とを備えた空気調和機
において、上記制御手段は、空気調和機の運転開始直
後、圧縮機の回転周波数領域が四方弁が反転し得る回転
周波数領域に達するまで周波数変化速度を一定の比較的
高速度とし、その後所定時間、回転周波数をそのまま保
持する手段と、その後、吐出温度センサと凝縮温度セン
サの検出温度からその検出温度差を算出し、その値と予
め設定した検出温度差の基準値とを比較し、検出温度差
が基準値未満の場合の周波数変化速度を小に設定して回
転数を徐々に高め、検出温度差が基準値以上に達した場
合の周波数変化速度を大とし、回転数を高めるよう周波
数変化速度を切換える周波数変化速度設定部を有する。In order to achieve the above-mentioned object, the present invention comprises an outdoor structure comprising a compressor, a four-way valve, an outdoor heat exchanger, an indoor heat exchanger, and a pressure reducer, which are sequentially connected by piping. A heat pump type refrigeration cycle in which one of a heat exchanger and an indoor heat exchanger is selectively used as a refrigerant condenser, a discharge temperature sensor for detecting a discharge temperature of a compressor, and a condenser. In the air conditioner provided with a condensing temperature sensor for detecting the temperature of, and a control means for setting the frequency change speed of the compressor according to a desired rotation frequency region of the compressor, the control means is an air conditioner. Immediately after starting operation
After that, the rotation frequency range of the compressor can be reversed by the four-way valve
The rate of frequency change is relatively constant until the frequency domain is reached.
Set to high speed and then keep the rotation frequency for a predetermined time.
Holding means, then the discharge temperature sensor and the condensation temperature sensor.
Calculate the detected temperature difference from the temperature detected by the
For comparison with the reference value of the detected temperature difference set for
Is less than the reference value, set the frequency change speed to small and turn
When the number of rotations is gradually increased and the detected temperature difference exceeds the reference value,
Frequency to increase the frequency and increase the frequency
It has a frequency change speed setting unit for switching the number change speed .
【０００５】また、本発明は、圧縮機、四方弁、室外熱
交換器、室内熱交換器、及び、減圧器を順次配管接続し
てなり上記室外熱交換器と上記室内熱交換器のうちのい
ずれか一方が選択的に冷媒の凝縮器として利用されるヒ
−トポンプ式の冷凍サイクルと、上記圧縮機の吐出温度
を検出する吐出温度センサと、上記凝縮器の温度を検出
する凝縮温度センサと、上記圧縮機の所望の回転周波数
領域に応じて上記圧縮機の周波数変化速度を設定する制
御手段とを備えた空気調和機において、 上記制御手段
は、空気調和機の運転開始直後、圧縮機の回転周波数領
域が四方弁が反転し得る回転周波数領域に達するまで周
波数変化速度を一定の比較的高速度とし、その後所定時
間、回転周波数をそのまま保持する手段と、その後、吐
出温度センサの検出温度と予め設定した検出温度の基準
値とを比較し、検出温度が基準値未満の場合の周波数変
化速度を小に設定して回転数を徐々に高め、検出温度が
基準値以上に達した場合の周波数変化速度を大とし、回
転数を高めるよう周波数変化速度を切換える。 The present invention also provides a compressor, a four-way valve, and outdoor heat.
Connect the exchanger, indoor heat exchanger, and decompressor in order by piping.
Of the above outdoor heat exchanger and indoor heat exchanger
One of them is selectively used as a refrigerant condenser.
-Pump pump type refrigeration cycle and discharge temperature of the compressor
Discharge temperature sensor to detect the temperature of the condenser
Condensing temperature sensor and the desired rotation frequency of the compressor
A control to set the frequency change speed of the compressor according to the area.
An air conditioner including a control means,
Immediately after the start of operation of the air conditioner,
Range until it reaches the rotational frequency range where the four-way valve can reverse.
The wave number change speed is set to a constant relatively high speed, and then at a predetermined time
For a period of time, a means to hold the rotation frequency as it is,
Criteria for the detection temperature of the temperature sensor and the preset detection temperature
Frequency fluctuation when the detected temperature is less than the reference value.
The temperature is set to a small value and the rotation speed is gradually increased to
If the frequency exceeds the reference value, increase the frequency change speed and
The frequency change speed is switched to increase the number of turns.
【０００６】[0006]
【０００７】したがって、これらの発明は、圧縮機中の
油の過度な吐出を防止するとともに、空気調和機の室温
制御に対する追随性を向上できるようにした。 Therefore, these inventions can prevent the excessive discharge of oil in the compressor and improve the followability to the room temperature control of the air conditioner.
【０００８】[0008]
【実施例】以下、本発明の各実施例を図１〜図９に基づ
いて説明する。図１は本発明の第１実施例の空気調和機
１を示している。この空気調和機１はヒ−トポンプ式の
冷凍サイクル２を備えており、冷凍サイクル２は圧縮機
３、室内熱交換器４、室外熱交換器５、膨張弁６（減圧
器）、及び、四方弁７を順次配管接続している。圧縮機
３の吐出口に四方弁７を介して室外熱交換器５が接続さ
れており、室外熱交換器５に膨張弁６を介して室内熱交
換器４が接続されている。さらに、室内熱交換器４に四
方弁７を介して圧縮機３の吸込口が接続されている。ま
た、室内熱交換器４の近傍に室内ファン８が設けられて
おり、室外熱交換器５の近傍に室外ファン９が設けられ
ている。Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 shows an air conditioner 1 according to the first embodiment of the present invention. The air conditioner 1 includes a heat pump type refrigeration cycle 2, and the refrigeration cycle 2 includes a compressor 3, an indoor heat exchanger 4, an outdoor heat exchanger 5, an expansion valve 6 (pressure reducer), and a four-way valve. The valves 7 are sequentially connected by piping. The outdoor heat exchanger 5 is connected to the discharge port of the compressor 3 via a four-way valve 7, and the indoor heat exchanger 4 is connected to the outdoor heat exchanger 5 via an expansion valve 6. Further, the suction port of the compressor 3 is connected to the indoor heat exchanger 4 via a four-way valve 7. An indoor fan 8 is provided near the indoor heat exchanger 4, and an outdoor fan 9 is provided near the outdoor heat exchanger 5.
【０００９】これらのうち、圧縮機３、室外熱交換器
５、膨張弁６、四方弁７、および室外ファン９を主体に
室外ユニットＡが構成されている。さらに、室内熱交換
器４および室内ファン８を主体に室内ユニットＢが構成
されている。Of these, the outdoor unit A is mainly composed of the compressor 3, the outdoor heat exchanger 5, the expansion valve 6, the four-way valve 7 and the outdoor fan 9. Further, the indoor unit B is mainly composed of the indoor heat exchanger 4 and the indoor fan 8.
【００１０】冷房時は、実線矢印の方向に冷媒が流れて
冷房サイクルが形成され、室外熱交換器５が凝縮器、室
内熱交換器４が蒸発器として機能する。暖房時は、四方
弁７が切換わることにより、破線矢印の方向に冷媒が流
れて暖房サイクルが形成され、室内熱交換器４が凝縮
器、室外熱交換器５が蒸発器として機能する。During cooling, the refrigerant flows in the direction of the solid arrow to form a cooling cycle, and the outdoor heat exchanger 5 functions as a condenser and the indoor heat exchanger 4 functions as an evaporator. During heating, by switching the four-way valve 7, the refrigerant flows in the direction of the broken line arrow to form a heating cycle, and the indoor heat exchanger 4 functions as a condenser and the outdoor heat exchanger 5 functions as an evaporator.
【００１１】圧縮機３には吐出温度センサ１０が取付け
られており、室内熱交換器４と室外熱交換器５とにはそ
れぞれ室内熱交換器温度センサ１１、室外熱交換器セン
サ１２が取付けられている。図２に示すように、吐出温
度センサ１０と室外熱交換器センサ１１は室外制御部１
３に接続されており、室内熱交換器センサ１２は室内制
御部１４に接続されている。そして、室外制御部１３と
室内制御部１４とにより制御手段１５が構成されてい
る。A discharge temperature sensor 10 is attached to the compressor 3, and an indoor heat exchanger temperature sensor 11 and an outdoor heat exchanger sensor 12 are attached to the indoor heat exchanger 4 and the outdoor heat exchanger 5, respectively. ing. As shown in FIG. 2, the discharge temperature sensor 10 and the outdoor heat exchanger sensor 11 are connected to the outdoor control unit 1.
3 and the indoor heat exchanger sensor 12 is connected to the indoor control unit 14. The outdoor control unit 13 and the indoor control unit 14 constitute control means 15.
【００１２】室外制御部１３及び室内制御部１４は、そ
れぞれマイクロコンピュータおよびその周辺回路からな
り、電源ライン１６及びシリアル信号ライン１７を介し
て互いに接続されている。そして、両制御部１３、１４
はシリアル信号ライン１７を通して相互にデータ転送を
行ないながら、空気調和機１の全般にわたる制御を行な
う。The outdoor control unit 13 and the indoor control unit 14 are each composed of a microcomputer and its peripheral circuits, and are connected to each other via a power supply line 16 and a serial signal line 17. Then, both control units 13 and 14
Performs overall control of the air conditioner 1 while mutually transferring data through the serial signal line 17.
【００１３】室内制御部１４には商用交流電源１８が接
続されている。さらに、室内制御部１４には室内温度セ
ンサ１９、ファンモ−タ２０、及び、ル−バ駆動モ−タ
２１が接続されている。そして、室内制御部１４の操作
は、リモコン２２を利用して行われる。また、リモコン
２２は設定室内温度の入力にも利用される。A commercial AC power source 18 is connected to the indoor control unit 14. Further, an indoor temperature sensor 19, a fan motor 20, and a louver drive motor 21 are connected to the indoor control unit 14. Then, the operation of the indoor control unit 14 is performed using the remote controller 22. The remote controller 22 is also used to input the set room temperature.
【００１４】室外制御部１３には、圧縮機モ−タ２３を
回転制御するインバ−タ回路２４が接続されている。ま
た、室外制御部１３には四方弁７やファンモ−タ２５も
接続されている。An inverter circuit 24 for controlling the rotation of the compressor motor 23 is connected to the outdoor controller 13. The four-way valve 7 and a fan motor 25 are also connected to the outdoor control unit 13.
【００１５】さらに、室外制御部１３は、図３に示すよ
うに、ＣＰＵ２６、メモリ２７、温度差算出部２８、及
び、周波数変化速度設定部２９を有している。メモリ２
７は、種々の設定温度と圧縮機３の回転周波数領域との
対応を表す情報を記憶している。また、温度差算出部２
８は、吐出温度センサ１０と室外熱交換器温度センサ１
１の検出温度の差、或いは、吐出温度センサ１０と室内
熱交換器温度センサ１２の検出温度の差を求める。Further, the outdoor control unit 13 has a CPU 26, a memory 27, a temperature difference calculation unit 28, and a frequency change speed setting unit 29, as shown in FIG. Memory 2
Reference numeral 7 stores information indicating the correspondence between various set temperatures and the rotation frequency region of the compressor 3. In addition, the temperature difference calculation unit 2
8 is a discharge temperature sensor 10 and an outdoor heat exchanger temperature sensor 1
The difference between the detected temperature of No. 1 or the detected temperature between the discharge temperature sensor 10 and the indoor heat exchanger temperature sensor 12 is obtained.
【００１６】さらに、周波数変化速度設定部２９は、温
度差算出部２８によって算出された検出温度差に基づい
て周波数変化速度のデ−タをＣＰＵ２６に出力する。そ
して、周波数変化速度設定部２９によって設定された周
波数変化速度Ｖ（Hz／sec ）は、圧縮機３の回転周波数
が所望の領域に達するまで維持される。所望の周波数領
域は実際の室温と設定室内温度とに基づいて決定され
る。Further, the frequency change speed setting unit 29 outputs frequency change speed data to the CPU 26 based on the detected temperature difference calculated by the temperature difference calculation unit 28. The frequency change speed V (Hz / sec) set by the frequency change speed setting unit 29 is maintained until the rotation frequency of the compressor 3 reaches a desired region. The desired frequency range is determined based on the actual room temperature and the set room temperature.
【００１７】つぎに、上述の空気調和機１の作用を説明
する。まず、空気調和機１の運転開始直後、圧縮機３の
回転周波数が、四方弁７の反転に必要な冷媒の高低圧差
が得られる領域（例えば６０Hz) に達するまで、図５に
示すように周波数変化速度Ｖは一定に保たれる。本実施
例では、この際の周波数変化速度Ｖは１（Hz／sec ）に
設定されている。そして、圧縮機３の回転周波数が６０
Hzに達した後は、回転周波数がそのまま保たれる。この
間、図５中に符号３１、３２で示すように、圧縮機３の
吐出温度ＴD と凝縮温度（冷房時は室内熱交換器４の温
度、暖房時は室外熱交換器５の温度）ＴC は徐々に上昇
する。Next, the operation of the air conditioner 1 will be described. First, immediately after the operation of the air conditioner 1 is started, as shown in FIG. The rate of change V is kept constant. In this embodiment, the frequency change speed V at this time is set to 1 (Hz / sec). The rotation frequency of the compressor 3 is 60
After reaching Hz, the rotation frequency remains the same. During this period, as indicated by reference numerals 31 and 32 in FIG. 5, the discharge temperature T D and the condensation temperature (the temperature of the indoor heat exchanger 4 during cooling, the temperature of the outdoor heat exchanger 5 during heating) T C gradually rises.
【００１８】この後、周波数変化速度Ｖが一旦０．２
（Hz／sec ）に設定され、圧縮機３の回転周波数が徐々
に高められる。さらに、吐出温度ＴD と凝縮温度ＴC と
の差が所定の基準値（例えば２０Ｋ）に達すると、周波
数変化速度設定部２８が変化速度Ｖを０．５（Hz／sec
）に切換える。この切換に伴って圧縮機３の回転周波
数が更に急激に上昇し、吐出温度ＴD と凝縮温度ＴC は
室温が設定温度に安定するよう上昇する。Thereafter, the frequency change speed V is once set to 0.2.
(Hz / sec), and the rotation frequency of the compressor 3 is gradually increased. Further, when the difference between the discharge temperature T D and the condensing temperature T C reaches a predetermined reference value (for example, 20 K), the frequency change speed setting unit 28 sets the change speed V to 0.5 (Hz / sec).
). With this switching, the rotation frequency of the compressor 3 rises more rapidly, and the discharge temperature T D and the condensing temperature T C rise so that the room temperature becomes stable at the set temperature.
【００１９】このような空気調和機１においては、吐出
ガス温度ＴD と凝縮温度ＴC とに基づいて周波数変化速
度Ｖが切換えられる。そして、圧縮機３の回転周波数が
６０Hzに達するまでは周波数変化速度Ｖが比較的高め１
（Hz／sec ）に設定されているので、四方弁７を素早く
確実に反転させることができる。In such an air conditioner 1, the frequency change speed V is switched based on the discharge gas temperature T D and the condensing temperature T C. The frequency change speed V is relatively high until the rotation frequency of the compressor 3 reaches 60 Hz.
Since it is set to (Hz / sec), the four-way valve 7 can be quickly and reliably reversed.
【００２０】また、吐出ガス温度ＴD と凝縮温度ＴC と
の差が小さい（２０Ｋ未満）場合には、周波数変化速度
Ｖが遅く（０．２Hz／sec ）に設定されるので、圧縮機
３からの吐油量を抑制することができ、図６（ａ）に示
すように油面の過度な低下を防止できる。そして、圧縮
機３に常に充分な量の油を確保することが可能になる。When the difference between the discharge gas temperature T D and the condensing temperature T C is small (less than 20 K), the frequency change speed V is set to be slow (0.2 Hz / sec), so the compressor 3 The amount of oil discharged from the oil can be suppressed, and an excessive decrease in the oil level can be prevented as shown in FIG. Then, it becomes possible to always secure a sufficient amount of oil in the compressor 3.
【００２１】ここで、図６（ａ）は油面の高さの変化
（実線３６）を示している。また、同図中の一点鎖線３
７は周波数変化速度Ｖが高いまま切換えられない場合を
示している。周波数変化速度Ｖが切換えられない場合に
は油面が一時的に大きく低下することが分かる。なお、
周波数変化速度Ｖが低いまま切換えられない場合には、
実線３６と同様に油面は略一定に保たれる。油面の変化
は、図６（ｂ）に示すように、圧縮機３に設けられた油
面観察用窓４１を通して観察される。Here, FIG. 6A shows a change in the height of the oil surface (solid line 36). Also, the alternate long and short dash line 3 in FIG.
7 shows a case where the frequency change speed V remains high and switching is not possible. It can be seen that the oil level temporarily greatly decreases when the frequency change speed V cannot be switched. In addition,
If the frequency change speed V remains low and switching is not possible,
Similar to the solid line 36, the oil level is kept substantially constant. The change in the oil level is observed through an oil level observation window 41 provided in the compressor 3, as shown in FIG.
【００２２】また、本実施例では、吐出ガス温度ＴD と
凝縮温度ＴC との差が基準値（２０Ｋ以上）に達すると
周波数変化速度Ｖが高められる（０．５Hz／sec ）の
で、周波数変化を過度に遅らせることなく、吐出温度Ｔ
D を効率よく高めることができる。このため、図７に実
線３８で示すように、空気調和機１の室温制御に対する
追随性を向上できる。ここで、同図中の一点鎖線３９は
周波数変化速度Ｖが速すぎる場合を示しており、二点鎖
線４０は周波数変化速度Ｖが遅すぎる場合を示してい
る。Further, in this embodiment, when the difference between the discharge gas temperature T D and the condensation temperature T C reaches the reference value (20 K or more), the frequency change speed V is increased (0.5 Hz / sec), so The discharge temperature T is not excessively delayed.
D can be efficiently increased. Therefore, as shown by the solid line 38 in FIG. 7, the followability with respect to the room temperature control of the air conditioner 1 can be improved. Here, the alternate long and short dash line 39 in the figure shows the case where the frequency change speed V is too fast, and the two-dot chain line 40 shows the case where the frequency change speed V is too slow.
【００２３】なお、本発明は、要旨を逸脱しない範囲で
種々に変形することが可能である。例えば、本実施例で
は温度差算出部２８や周波数変化速度設定部２９が室外
ユニットＡに備えられているが、本発明はこれに限定さ
れるものではなく、例えばこれらを室内ユニットＢに設
けてもよい。The present invention can be variously modified without departing from the scope of the invention. For example, in the present embodiment, the temperature difference calculation unit 28 and the frequency change speed setting unit 29 are provided in the outdoor unit A, but the present invention is not limited to this. For example, they may be provided in the indoor unit B. Good.
【００２４】また、本実施例では、周波数変化速度の切
換のために吐出温度と凝縮温度との検出温度差が利用さ
れているが、本発明はこれに限定されるものではなく、
例えば、図８及び図９に示す第２実施例のように、吐出
温度のみを参照してもよい。この実施例では、吐出温度
の基準を７０℃として、周波数変化速度が０．２（Hz／
sec ）から０．５（Hz／sec ）に切換えられている。Further, in the present embodiment, the detected temperature difference between the discharge temperature and the condensation temperature is used for switching the frequency change speed, but the present invention is not limited to this.
For example, like the second embodiment shown in FIGS. 8 and 9, only the discharge temperature may be referred to. In this embodiment, the discharge temperature reference is 70 ° C., and the frequency change rate is 0.2 (Hz /
sec) to 0.5 (Hz / sec).
【００２５】[0025]
【発明の効果】以上説明したように本発明によれば、圧
縮機中の油の過度な吐出を防止するとともに、空気調和
機の室温制御に対する追随性を向上できるという効果が
ある。As described above, according to the present invention, it is possible to prevent excessive discharge of oil in the compressor and improve the followability of the air conditioner with respect to room temperature control.
【図１】本発明の第１実施例の空気調和機を示す構成
図。FIG. 1 is a configuration diagram showing an air conditioner of a first embodiment of the present invention.
【図２】本発明の第１実施例の空気調和機の制御回路を
示すブロック図。FIG. 2 is a block diagram showing a control circuit of the air conditioner of the first embodiment of the present invention.
【図３】室外制御部を示すブロック図。FIG. 3 is a block diagram showing an outdoor control unit.
【図４】周波数変化速度の切換え手順を示すフロ−チャ
−ト。FIG. 4 is a flow chart showing a procedure for switching the frequency changing speed.
【図５】圧縮機の回転数の変化と吐出温度及び凝縮温度
の変化との関係を示すグラフ。FIG. 5 is a graph showing the relationship between changes in the number of revolutions of the compressor and changes in discharge temperature and condensation temperature.
【図６】圧縮機の油面の変化を示すグラフ。FIG. 6 is a graph showing changes in the oil level of the compressor.
【図７】周波数変化速度と室温との関係を示すグラフ。FIG. 7 is a graph showing the relationship between frequency change rate and room temperature.
【図８】本発明の第２実施例の空気調和機の周波数変化
速度の切換え手順を示すフロ−チャ−ト。FIG. 8 is a flow chart showing a procedure for changing the frequency changing speed of the air conditioner of the second embodiment of the present invention.
【図９】周波数変化速度と室温との関係を示すグラフ。FIG. 9 is a graph showing the relationship between frequency change rate and room temperature.
１…空気調和機、２…冷凍サイクル、３…圧縮機、４…
室内熱交換器（凝縮器）、５…室外熱交換器（凝縮
器）、６…膨張弁（減圧器）、７…四方弁、１０…吐出
温度センサ、１１…室外熱交換器温度センサ（凝縮温度
センサ）、１２…室内熱交換器温度センサ（凝縮温度セ
ンサ）
１５…制御手段、２８…温度差算出部、２９…周波数変
化速度設定部、Ａ…室外ユニット、Ｂ…室内ユニット。1 ... Air conditioner, 2 ... Refrigeration cycle, 3 ... Compressor, 4 ...
Indoor heat exchanger (condenser), 5 ... Outdoor heat exchanger (condenser), 6 ... Expansion valve (decompressor), 7 ... Four-way valve, 10 ... Discharge temperature sensor, 11 ... Outdoor heat exchanger temperature sensor (condensation) Temperature sensor), 12 ... Indoor heat exchanger temperature sensor (condensation temperature sensor) 15 ... Control means, 28 ... Temperature difference calculation unit, 29 ... Frequency change speed setting unit, A ... Outdoor unit, B ... Indoor unit.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) F25B 1/00 371 F25B 1/00 361 F24F 11/02 102 ─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. 7 , DB name) F25B 1/00 371 F25B 1/00 361 F24F 11/02 102
Claims (2)
交換器、及び、減圧器を順次配管接続してなり上記室外
熱交換器と上記室内熱交換器のうちのいずれか一方が選
択的に冷媒の凝縮器として利用されるヒ−トポンプ式の
冷凍サイクルと、上記圧縮機の吐出温度を検出する吐出
温度センサと、上記凝縮器の温度を検出する凝縮温度セ
ンサと、上記圧縮機の所望の回転周波数領域に応じて上
記圧縮機の周波数変化速度を設定する制御手段とを備え
た空気調和機において、 上記制御手段は、空気調和機の運転開始直後、上記圧縮
機の回転周波数領域が上記四方弁が反転し得る回転周波
数領域に達するまで上記周波数変化速度を一定の比較的
高速度とし、その後所定時間、回転周波数をそのまま保
持する手段と、その後、上記吐出温度センサと上記凝縮
温度センサの検出温度からその検出温度差を算出し、そ
の値と予め設定した上記検出温度差の基準値とを比較
し、上記検出温度差が上記基準値未満の場合の周波数変
化速度を小に設定して回転数を徐々に高め、上記検出温
度差が上記基準値以上に達した場合の周波数変化速度を
大とし、回転数を高めるよう周波数変化速度を切換える
周波数変化速度設定部を有することを特徴とする空気調
和機。1. A compressor, a four-way valve, an outdoor heat exchanger, an indoor heat exchanger, and a pressure reducer are sequentially connected by piping, and either one of the outdoor heat exchanger and the indoor heat exchanger is connected. A heat pump type refrigeration cycle selectively used as a refrigerant condenser, a discharge temperature sensor for detecting the discharge temperature of the compressor, a condensing temperature sensor for detecting the temperature of the condenser, and the compressor. In an air conditioner equipped with a control means for setting the frequency change speed of the compressor according to the desired rotation frequency area of, the control means, immediately after the start of operation of the air conditioner, the rotation frequency area of the compressor Is a relatively high speed at which the frequency changes until a rotation frequency region in which the four-way valve can be reversed is reached, and then a means for holding the rotation frequency as it is for a predetermined time, and then the discharge temperature sensor and Calculate the detected temperature difference from the detected temperature of the condensation temperature sensor, compare the value with the preset reference value of the detected temperature difference, and reduce the frequency change speed when the detected temperature difference is less than the reference value. The frequency change speed setting unit is set to gradually increase the rotation speed, increase the frequency change speed when the detected temperature difference reaches the reference value or more, and switch the frequency change speed to increase the rotation speed. An air conditioner characterized by.
交換器、及び、減圧器を順次配管接続してなり上記室外
熱交換器と上記室内熱交換器のうちのいずれか一方が選
択的に冷媒の凝縮器として利用されるヒ−トポンプ式の
冷凍サイクルと、上記圧縮機の吐出温度を検出する吐出
温度センサと、上記凝縮器の温度を検出する凝縮温度セ
ンサと、上記圧縮機の所望の回転周波数領域に応じて上
記圧縮機の周波数変化速度を設定する制御手段とを備え
た空気調和機において、 上記制御手段は、空気調和機の運転開始直後、上記圧縮
機の回転周波数領域が上記四方弁が反転し得る回転周波
数領域に達するまで上記周波数変化速度を一定の比較的
高速度とし、その後所定時間、回転周波数をそのまま保
持する手段と、その後、上記吐出温度センサの検出温度
と予め設定した検出温度の基準値とを比較し、上記検出
温度が上記基準値未満の場合の周波数変化速度を小に設
定して回転数を徐々に高め、上記検出温度が上記基準値
以上に達した場合の周波数変化速度を大とし、回転数を
高めるよう周波数変化速度を切換える周波数変化速度設
定部を有することを特徴とする空気調和機。2. A compressor, a four-way valve, an outdoor heat exchanger, an indoor heat exchanger, and a pressure reducer are sequentially connected by piping, and either one of the outdoor heat exchanger and the indoor heat exchanger is connected. A heat pump type refrigeration cycle selectively used as a refrigerant condenser, a discharge temperature sensor for detecting the discharge temperature of the compressor, a condensing temperature sensor for detecting the temperature of the condenser, and the compressor. In an air conditioner equipped with a control means for setting the frequency change speed of the compressor according to the desired rotation frequency area of, the control means, immediately after the start of operation of the air conditioner, the rotation frequency area of the compressor Until the four-way valve reaches a rotation frequency region where the four-way valve can be reversed, the frequency changing speed is kept constant at a relatively high speed, and then a means for holding the rotation frequency as it is for a predetermined time, and thereafter, the discharge temperature sensor is detected. The temperature is compared with a preset reference value of the detected temperature, and when the detected temperature is lower than the reference value, the frequency change speed is set to a small value to gradually increase the rotation speed, and the detected temperature is equal to or higher than the reference value. The air conditioner is characterized in that it has a frequency change speed setting unit that increases the frequency change speed when the temperature reaches a predetermined value and switches the frequency change speed so as to increase the number of revolutions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30372493A JP3443442B2 (en) | 1993-12-03 | 1993-12-03 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30372493A JP3443442B2 (en) | 1993-12-03 | 1993-12-03 | Air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07158983A JPH07158983A (en) | 1995-06-20 |
| JP3443442B2 true JP3443442B2 (en) | 2003-09-02 |
Family
ID=17924506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30372493A Expired - Lifetime JP3443442B2 (en) | 1993-12-03 | 1993-12-03 | Air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3443442B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6985863B2 (en) * | 2017-09-07 | 2021-12-22 | シャープ株式会社 | air conditioner |
| JP2019143900A (en) * | 2018-02-21 | 2019-08-29 | パナソニックＩｐマネジメント株式会社 | Freezing device |
| CN114485254B (en) * | 2022-02-18 | 2023-10-10 | 佳木斯大学 | Uniform heat exchange control method for aircraft equipment |
-
1993
- 1993-12-03 JP JP30372493A patent/JP3443442B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07158983A (en) | 1995-06-20 |
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