JPH074766A - Air-conditioning device - Google Patents

Air-conditioning device

Info

Publication number
JPH074766A
JPH074766A JP5146066A JP14606693A JPH074766A JP H074766 A JPH074766 A JP H074766A JP 5146066 A JP5146066 A JP 5146066A JP 14606693 A JP14606693 A JP 14606693A JP H074766 A JPH074766 A JP H074766A
Authority
JP
Japan
Prior art keywords
compressor
refrigerant
outdoor unit
air
accumulator
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.)
Withdrawn
Application number
JP5146066A
Other languages
Japanese (ja)
Inventor
Sakae Yamamoto
栄 山本
Katsutoshi Kitagawa
勝敏 北川
Kiyougo Chiga
匡悟 千賀
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP5146066A priority Critical patent/JPH074766A/en
Publication of JPH074766A publication Critical patent/JPH074766A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00Control issues
    • F25B2600/02Compressor control
    • F25B2600/021Inverters therefor
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Landscapes

  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)

Abstract

PURPOSE:To provide an air-conditioning device simple in structure and capable of damping the vibration at the time of partial load operation. CONSTITUTION:The air-conditioning load required of indoor units 14a and 14b is transmitted to an outdoor unit control part 13 after the load detection and computation have been made by indoor unit control parts 17a and 17b. The outdoor unit control part 13 drives a frequency variable compressor 20 with the frequency responsive to the air-conditioning load and, when the driving frequency becomes a predetermined value or less, opens a solenoid valve 21. As a result, the gas refrigerant compressed by a compressor 20 is allowed to flow in the direction of a four-way change-over valve 3 and this gas refrigerant is partially supplied through a discharge bypass pipe 9, the solenoid 21 and a hot gas bypass 22 to a refrigerant controller 23 and from there is bypassed through a low pressure accumulator return pipe 11 into an accumulator 7. Therefore, this air-conditioning device can obtain the same effect as at the time of the partial load operation of the volume control type frequency variable compressor of the conventional air-conditioner.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、インバータ駆動圧縮機
を用いたヒートポンプ式の空気調和機に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat pump type air conditioner using an inverter driven compressor.

【0002】[0002]

【従来の技術】従来、ヒートポンプ式の空気調和機は、
図2に示すように構成されている。同図において、1は
室外ユニットで、この室外ユニット1には予め設定され
た範囲の周波数に対して運転を行ない冷媒を圧縮する容
量制御形周波数可変式圧縮機2と、冷媒の流れを切り換
える四方切換弁3と、冷媒の熱を交換するための室外機
熱交換器4と、圧縮機2の運転状態を選択するフルロー
ド容量制御用電磁弁5及びパーシャルロード容量制御用
電磁弁6と、冷媒液を蓄えるアキュムレータ7が設置さ
れる。
2. Description of the Related Art Conventionally, heat pump type air conditioners are
It is configured as shown in FIG. In the figure, reference numeral 1 denotes an outdoor unit. The outdoor unit 1 has a capacity-controlled frequency variable compressor 2 for operating a frequency within a preset range to compress the refrigerant, and a four-way unit for switching the flow of the refrigerant. A switching valve 3, an outdoor unit heat exchanger 4 for exchanging heat of the refrigerant, a solenoid valve 5 for controlling a full load capacity and a solenoid valve 6 for controlling a partial load capacity, which selects an operating state of the compressor 2, and a refrigerant. An accumulator 7 that stores liquid is installed.

【0003】そして、上記圧縮機2と四方切換弁3の間
は、吐出管8で結ばれ、その途中に吐出バイパス管9が
設けられる。この吐出バイパス管9は、フルロード容量
制御用電磁弁5に接続され、更にその先に、パーシャル
ロード容量制御用電磁弁6及び低圧管10が配設され
る。この低圧管10は、アキュムレータもどり管11に
接続される。
A discharge pipe 8 is connected between the compressor 2 and the four-way switching valve 3, and a discharge bypass pipe 9 is provided on the way. The discharge bypass pipe 9 is connected to the full load capacity control solenoid valve 5, and further, the partial load capacity control solenoid valve 6 and the low pressure pipe 10 are disposed further ahead. The low pressure pipe 10 is connected to the accumulator return pipe 11.

【0004】また、フルロード容量制御用電磁弁5とパ
ーシャルロード容量制御用電磁弁6の間に配設された吐
出バイパス管9から圧縮機2に、容量制御用圧力管12
が配設される。更に、この室外ユニット1には、主に室
外ユニット1を電気的に制御する室外機制御部13が設
置される。
Further, from the discharge bypass pipe 9 arranged between the full load capacity control solenoid valve 5 and the partial load capacity control solenoid valve 6 to the compressor 2, the capacity control pressure pipe 12 is provided.
Is provided. Further, the outdoor unit 1 is mainly provided with an outdoor unit controller 13 that electrically controls the outdoor unit 1.

【0005】そして、上記室外ユニット1には、1台ま
たは複数台例えば2台の室内ユニット14a,14bが
冷媒配管18により接続される。上記各室内ユニット1
4a,14bは、室内機熱交換器15a,15b,絞り
機構、即ち冷媒を膨脹するための膨張弁16a,16b
及び冷暖房負荷の情報を室外機制御部13に伝送する室
内機制御部17a,17bで構成される。この室内機制
御部17a,17bは、室外機制御部13に電気的に接
続される。
To the outdoor unit 1, one or a plurality of indoor units 14a and 14b, for example, two indoor units 14a and 14b are connected by a refrigerant pipe 18. Each indoor unit 1
4a and 14b are indoor unit heat exchangers 15a and 15b, a throttle mechanism, that is, expansion valves 16a and 16b for expanding the refrigerant.
And the indoor unit control units 17a and 17b that transmit information on the cooling / heating load to the outdoor unit control unit 13. The indoor unit controllers 17a and 17b are electrically connected to the outdoor unit controller 13.

【0006】上記のように構成された空気調和機は、次
のように動作する。冷房運転時には、容量制御形周波数
可変式圧縮機2により圧縮された冷媒は、四方切換弁3
を通して、室外機熱交換器4へ送られ、凝縮された後に
室内ユニット14a,14bに送られる。この室内ユニ
ット14a,14bに送られた冷媒は、膨張弁16a,
16bで膨張して低圧となり、室内機熱交換器15a,
15bで蒸発する。その後、再び四方切換弁3を通り、
アキュムレータ7から圧縮機2へ戻る。
The air conditioner configured as described above operates as follows. During the cooling operation, the refrigerant compressed by the capacity control type frequency variable compressor 2 is transferred to the four-way switching valve 3
Is sent to the outdoor unit heat exchanger 4, condensed, and then sent to the indoor units 14a and 14b. The refrigerant sent to the indoor units 14a and 14b is the expansion valve 16a,
16b expands to a low pressure, and the indoor unit heat exchanger 15a,
Evaporate at 15b. After that, it passes through the four-way switching valve 3 again,
Returning from the accumulator 7 to the compressor 2.

【0007】暖房運転時には、四方切換弁3が切換えら
れ、室外機熱交換器4と室内機熱交換器15a,15b
の作用が逆となるように冷媒の流れが逆になる。図3
は、フルロード容量制御用電磁弁5及びパーシャルロー
ド容量制御用電磁弁6の開閉により、圧縮機2の容量制
御を行なうことを示した電磁弁の動作一覧である。
During the heating operation, the four-way switching valve 3 is switched, and the outdoor unit heat exchanger 4 and the indoor unit heat exchangers 15a and 15b.
The flow of the refrigerant is reversed so that the action of is reversed. Figure 3
[Fig. 6] is a list of operations of the solenoid valve showing that the capacity control of the compressor 2 is performed by opening and closing the full load capacity control solenoid valve 5 and the partial load capacity control solenoid valve 6.

【0008】フルロード容量制御用電磁弁5を開とし、
パーシャルロード容量制御用電磁弁6を閉とした場合、
容量制御用圧力管12の中の圧力は吐出管8の圧力と同
一の高圧となり、圧縮機2はフルロードで運転する。
The solenoid valve 5 for full load capacity control is opened,
When the partial load capacity control solenoid valve 6 is closed,
The pressure in the capacity control pressure pipe 12 becomes the same high pressure as the pressure of the discharge pipe 8, and the compressor 2 operates at full load.

【0009】また、フルロード容量制御用電磁弁5を開
としてパーシャルロード容量制御用電磁弁6を閉とした
場合、容量制御用圧力管12の中の圧力はアキュムレー
タもどり管11の圧力と同一の低圧となり、圧縮機2は
パーシャルロードで運転を行なう。
When the full load capacity control solenoid valve 5 is opened and the partial load capacity control solenoid valve 6 is closed, the pressure in the capacity control pressure pipe 12 is the same as the pressure in the accumulator return pipe 11. The pressure becomes low, and the compressor 2 operates at a partial load.

【0010】即ち、上記圧縮機2は、容量制御用圧力管
12に規定値以上の圧力がかかっている場合、フルロー
ドで運転を行ない、それ以下の場合には吐出ガスを圧縮
機2の中でバイパスさせてパーシャルロードで運転を行
なう構造となっている。
That is, the compressor 2 is operated at full load when the pressure for controlling the capacity 12 is higher than a specified value. It is designed to be operated by partial road by bypassing at.

【0011】[0011]

【発明が解決しようとする課題】容量制御形周波数可変
式圧縮機2は、フルロードからパーシャルロードへ切換
えも可能で広い範囲で運転できるが、パーシャルロード
時に運転を行なうと圧力変動との関係で振動が大きくな
ることがある。その結果、室外ユニット1の振動が大き
くなる場合や、冷媒配管18に大きな振動を生ずること
がある。
The capacity control type variable frequency compressor 2 can be switched from full load to partial load and can be operated in a wide range. Vibration may increase. As a result, the vibration of the outdoor unit 1 may be large, or the refrigerant pipe 18 may be greatly vibrated.

【0012】また、フルロード容量制御用電磁弁5及び
パーシャルロード容量制御用電磁弁6の二つの電磁弁を
必要とすることから冷媒回路が複雑となる。本発明は上
記実情に鑑みてなされたものであり、圧縮機の振動を防
ぐと共に構成の簡単な空気調和機を提供することを目的
とする。
Further, since the two solenoid valves, the full load capacity controlling solenoid valve 5 and the partial load capacity controlling solenoid valve 6, are required, the refrigerant circuit becomes complicated. The present invention has been made in view of the above circumstances, and an object thereof is to provide an air conditioner that prevents vibration of a compressor and has a simple configuration.

【0013】[0013]

【課題を解決するための手段】本発明に係る空気調和機
は、インバータ駆動圧縮機、四方切換弁、室外機熱交換
器、絞り機構、室内機熱交換器、及びアキュムレータに
よりヒートポンプサイクルを構成してなる空気調和機に
おいて、上記圧縮機と四方切換弁との間からバイパスさ
せたバイパス回路に電磁弁および冷媒制御器を配設し、
そのバイパス回路をアキュムレータもどり管、あるいは
上記圧縮機とアキュムレータの間に連結させると共に、
制御部から上記圧縮機へ運転要求する周波数が予め規定
された値よりも低いときに、上記電磁弁を開とすること
を特徴とする。
An air conditioner according to the present invention constitutes a heat pump cycle by an inverter driven compressor, a four-way switching valve, an outdoor unit heat exchanger, a throttle mechanism, an indoor unit heat exchanger, and an accumulator. In an air conditioner consisting of, a solenoid valve and a refrigerant controller are arranged in a bypass circuit bypassed between the compressor and the four-way switching valve,
While connecting the bypass circuit between the accumulator return pipe or the compressor and accumulator,
The electromagnetic valve is opened when the frequency required by the control unit to operate the compressor is lower than a predetermined value.

【0014】[0014]

【作用】室外機制御部は、冷暖房負荷が大きいときは高
い周波数で圧縮機を駆動すると共にバイパス回路の電磁
弁を閉じる。従って、圧縮機により圧縮されたガス冷媒
は、四方切換弁の方向のみに流れ、フルロード駆動が行
なわれる。また、室外機制御部は、冷暖房負荷が小さく
なると、それに伴って圧縮機の駆動周波数を低下させる
が、その駆動周波数が周波数が規定値以下になると、バ
イパス回路の電磁弁を開く。この結果、圧縮機により圧
縮されたガス冷媒は、四方切換弁の方向に流れると共
に、その一部は電磁弁及び冷媒制御器を経てアキュムレ
ータもどり管を通り、アキュムレータへと流れる。
When the cooling / heating load is large, the outdoor unit controller drives the compressor at a high frequency and closes the solenoid valve of the bypass circuit. Therefore, the gas refrigerant compressed by the compressor flows only in the direction of the four-way switching valve, and full load drive is performed. Further, the outdoor unit controller lowers the drive frequency of the compressor as the cooling and heating load decreases, but opens the solenoid valve of the bypass circuit when the drive frequency falls below a specified value. As a result, the gas refrigerant compressed by the compressor flows in the direction of the four-way switching valve, and a part of the gas refrigerant flows through the solenoid valve and the refrigerant controller, the accumulator return pipe, and the accumulator.

【0015】このように圧縮機で圧縮されたガス冷媒の
一部を、バイパス回路によりキュムレータもどり管の低
圧側へバイパスすることにより、圧縮機の容量を減じた
のと同一の効果が得られる。これによりパーシャルロー
ド運転時の振動がなくなると共に、電磁弁の数を減少で
きると共に、パーシャルロードのない構造の簡単な周波
数可変式の圧縮機(インバータ駆動圧縮機)を用いるこ
とができる。
By bypassing a part of the gas refrigerant compressed by the compressor to the low pressure side of the return line of the cumulator by the bypass circuit, the same effect as reducing the capacity of the compressor can be obtained. As a result, vibration during partial load operation is eliminated, the number of solenoid valves can be reduced, and a simple variable frequency compressor (inverter drive compressor) without a partial load can be used.

【0016】[0016]

【実施例】以下、図面を参照して本発明の一実施例を説
明する。図1に同実施例に係る冷媒回路の構成を示す。
同図において1は室外ユニットで、この室外ユニット1
には予め設定された範囲の周波数に対して運転を行な
い、冷媒を圧縮する周波数可変式圧縮機(インバータ駆
動圧縮機)20と、冷媒の流れを切り換えるための四方
切換弁3と、冷媒の熱を交換するための室外機熱交換器
4と、バイパス回路の開閉を行うための電磁弁21と、
冷媒制御器23及び冷媒液を蓄えるアキュムレータ7が
設置される。また、この室外ユニット1には、主に室外
ユニット1を電気的に制御する室外機制御部13が設置
される。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows the configuration of the refrigerant circuit according to the embodiment.
In the figure, 1 is an outdoor unit, and this outdoor unit 1
Is a frequency variable compressor (inverter drive compressor) 20 for operating a frequency in a preset range to compress the refrigerant, a four-way switching valve 3 for switching the flow of the refrigerant, and a heat of the refrigerant. An outdoor unit heat exchanger 4 for exchanging air, a solenoid valve 21 for opening and closing a bypass circuit,
A refrigerant controller 23 and an accumulator 7 that stores a refrigerant liquid are installed. In addition, the outdoor unit 1 is mainly provided with an outdoor unit controller 13 that electrically controls the outdoor unit 1.

【0017】そして、上記圧縮機20と四方切換弁3の
間は、吐出管8で結ばれ、その途中にバイパス回路を構
成する吐出バイパス管9が設けられる。この吐出バイパ
ス管9は、電磁弁21、ホットガスバイパス管22及び
冷媒制御器23を介してアキュムレータもどり管11に
接続される。
A discharge pipe 8 is connected between the compressor 20 and the four-way switching valve 3, and a discharge bypass pipe 9 forming a bypass circuit is provided in the middle of the discharge pipe 8. The discharge bypass pipe 9 is connected to the accumulator return pipe 11 via a solenoid valve 21, a hot gas bypass pipe 22 and a refrigerant controller 23.

【0018】そして、上記室外ユニット1には、1台ま
たは複数台例えば2台の室内ユニット14a,14bが
冷媒配管18により接続される。上記各室内ユニット1
4a,14bは、室内機熱交換器15a,15b,絞り
機構、即ち冷媒を膨脹するための膨張弁16a,16b
及び冷暖房負荷の情報を室外機制御部13に伝送する室
内機制御部17a,17bで構成される。この室内機制
御部17a,17bは、室外機制御部13に電気的に接
続される。
To the outdoor unit 1, one or a plurality of indoor units 14a, 14b, for example, two are connected by a refrigerant pipe 18. Each indoor unit 1
4a and 14b are indoor unit heat exchangers 15a and 15b, a throttle mechanism, that is, expansion valves 16a and 16b for expanding the refrigerant.
And the indoor unit control units 17a and 17b that transmit information on the cooling / heating load to the outdoor unit control unit 13. The indoor unit controllers 17a and 17b are electrically connected to the outdoor unit controller 13.

【0019】次に上記実施例の動作を説明する。冷房運
転時には、周波数可変式圧縮機20により圧縮された冷
媒は、四方切換弁3を通して、室外機熱交換器4へ送ら
れ、凝縮された後に室内ユニット14a,14bに送ら
れる。この室内ユニット14a,14bに送られた冷媒
は、膨張弁16a,16bで膨張して低圧となり室内機
熱交換器15a,15bで蒸発する。その後、四方切換
弁3を介して、アキュムレータ7から圧縮機20へ供給
される。
Next, the operation of the above embodiment will be described. During the cooling operation, the refrigerant compressed by the variable frequency compressor 20 is sent to the outdoor unit heat exchanger 4 through the four-way switching valve 3, condensed, and then sent to the indoor units 14a and 14b. The refrigerant sent to the indoor units 14a, 14b is expanded by the expansion valves 16a, 16b to a low pressure, and evaporated in the indoor unit heat exchangers 15a, 15b. Then, it is supplied from the accumulator 7 to the compressor 20 via the four-way switching valve 3.

【0020】暖房運転時には、四方切換弁3が切換えら
れ、室外機熱交換器4と室内機熱交換器15a,15b
の作用が逆となるように冷媒の流れが逆になる。室内ユ
ニット14a,14bの要求する冷暖房負荷は、室内機
制御部17a,17bによって検知・演算された後に室
外機制御部13に伝送される。室外機制御部13は、室
内機制御部17a,17bから送られてくる冷暖房負荷
に応じた周波数で圧縮機20を運転制御する。
During the heating operation, the four-way switching valve 3 is switched, and the outdoor unit heat exchanger 4 and the indoor unit heat exchangers 15a, 15b.
The flow of the refrigerant is reversed so that the action of is reversed. The cooling / heating loads required by the indoor units 14a, 14b are transmitted to the outdoor unit controller 13 after being detected and calculated by the indoor unit controllers 17a, 17b. The outdoor unit control unit 13 controls the operation of the compressor 20 at a frequency according to the cooling / heating load sent from the indoor unit control units 17a and 17b.

【0021】室外機制御部13は、冷暖房負荷が大きい
ときは高い周波数で圧縮機20を駆動すると共に電磁弁
21を閉じる。この結果、圧縮機20によって圧縮され
たガス冷媒は四方切換弁3の方向のみに流れ、フルロー
ドの運転が行なわれる。また、室外機制御部13は、冷
暖房負荷が小さくなると、それに伴って圧縮機20の駆
動周波数を低下させ、その駆動周波数が周波数が規定値
以下になると、電磁弁21を開とする。この結果、圧縮
機20により圧縮されたガス冷媒は、四方切換弁3の方
向に流れると共に、その一部は吐出バイパス管9,電磁
弁21を介してホットガスバイパス管22に供給され
る。このホットガスバイパス管22を流れるガス冷媒
は、冷媒制御器23を経てアキュムレータもどり管11
を通り、アキュムレータ7へと流れる。
The outdoor unit controller 13 drives the compressor 20 at a high frequency and closes the solenoid valve 21 when the cooling and heating load is large. As a result, the gas refrigerant compressed by the compressor 20 flows only in the direction of the four-way switching valve 3, and full load operation is performed. Further, the outdoor unit control unit 13 lowers the drive frequency of the compressor 20 when the cooling and heating load decreases, and opens the solenoid valve 21 when the drive frequency becomes equal to or lower than the specified value. As a result, the gas refrigerant compressed by the compressor 20 flows in the direction of the four-way switching valve 3, and a part of the gas refrigerant is supplied to the hot gas bypass pipe 22 via the discharge bypass pipe 9 and the electromagnetic valve 21. The gas refrigerant flowing through the hot gas bypass pipe 22 passes through the refrigerant controller 23 and then accumulator return pipe 11
It flows through to the accumulator 7.

【0022】このように圧縮機20で圧縮されたガス冷
媒の一部をホットガスバイパス管22、冷媒制御器23
を介してアキュムレータもどり管11の低圧側へバイパ
スすることにより、圧縮機20の容量を減じたのと同一
の効果が得られる。つまり、従来の空気調和機の容量制
御形周波数可変式圧縮機がパーシャルロード運転をする
ことと同一の効果を得ることができる。これによりパー
シャルロード運転時の振動がなくなると共に、電磁弁の
数を二つから一つに減らすことができる。また、圧縮機
20は、パーシャルロードのない構造の簡単な周波数可
変式の圧縮機とすることができる。
A part of the gas refrigerant thus compressed by the compressor 20 is partially replaced by the hot gas bypass pipe 22 and the refrigerant controller 23.
By bypassing the accumulator to the low pressure side of the return pipe 11 via, the same effect as that of reducing the capacity of the compressor 20 can be obtained. That is, the same effect as the partial load operation of the conventional capacity-controlled variable frequency compressor of the air conditioner can be obtained. This eliminates vibration during partial load operation and reduces the number of solenoid valves from two to one. Further, the compressor 20 may be a simple frequency variable compressor having a structure without partial load.

【0023】なお、上記実施例では、圧縮機20で圧縮
されたガス冷媒の一部を電磁弁21、ホットガスバイパ
ス管22、冷媒制御器23を介してアキュムレータもど
り管11の低圧側へバイパスするようにしたが、その
他、圧縮機20とアキュムレータ7との間にバイパスす
るようにしても、上記実施例と同様の効果を得ることが
できる。
In the above embodiment, part of the gas refrigerant compressed by the compressor 20 is bypassed to the low pressure side of the accumulator return pipe 11 via the solenoid valve 21, the hot gas bypass pipe 22, and the refrigerant controller 23. However, if the bypass is provided between the compressor 20 and the accumulator 7, the same effect as the above embodiment can be obtained.

【0024】[0024]

【発明の効果】以上詳記したように本発明によれば、周
波数可変式圧縮機を駆動する周波数が予め規定された値
よりも低くなった際に電磁弁を開き、圧縮機で圧縮され
たガス冷媒の一部を冷媒制御器を介してアキュムレータ
もどり管あるいは、圧縮機とアキュムレータとの間にバ
イパスするようにしたので、容量制御形周波数可変式圧
縮機をパーシャルロード運転する場合と同様に冷暖房負
荷に応じた制御が可能であり、構造を簡易化し得ると共
にパーシャルロード運転時の振動を確実に防止すること
ができる。
As described above in detail, according to the present invention, when the frequency for driving the variable frequency compressor becomes lower than the predetermined value, the solenoid valve is opened and the compressor is compressed. Since a part of the gas refrigerant is bypassed via the refrigerant controller between the accumulator return pipe or between the compressor and accumulator, cooling / heating is performed in the same way as when the capacity-controlled frequency variable compressor is operated in partial load. Control according to the load is possible, the structure can be simplified, and vibration during partial load operation can be reliably prevented.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施例に係る空気調和機の冷媒回路
の構成を示す図。
FIG. 1 is a diagram showing a configuration of a refrigerant circuit of an air conditioner according to an embodiment of the present invention.

【図2】従来の空気調和機の冷媒回路の構成を示す図。FIG. 2 is a diagram showing a configuration of a refrigerant circuit of a conventional air conditioner.

【図3】従来の空気調和機のロード容量制御用電磁弁の
開閉状態を示す図。
FIG. 3 is a diagram showing an open / closed state of a load capacity control solenoid valve of a conventional air conditioner.

【符号の説明】 1 室外ユニット 2 周波数可変式圧縮機 3 四方切換弁 4 室外機熱交換器 7 アキュムレータ 8 吐出管 9 吐出バイパス管 11 アキュムレータもどり管 13 室外機制御部 14a,14b 室内ユニット 15a,15b 室内機熱交換器 16a,16b 膨張弁 17a,17b 室内機制御部 18 冷媒配管 21 電磁弁 22 ホットガスバイパス管 23 冷媒制御器[Explanation of symbols] 1 outdoor unit 2 variable frequency compressor 3 four-way switching valve 4 outdoor unit heat exchanger 7 accumulator 8 discharge pipe 9 discharge bypass pipe 11 accumulator return pipe 13 outdoor unit control unit 14a, 14b indoor unit 15a, 15b Indoor unit heat exchanger 16a, 16b Expansion valve 17a, 17b Indoor unit control unit 18 Refrigerant pipe 21 Solenoid valve 22 Hot gas bypass pipe 23 Refrigerant controller

───────────────────────────────────────────────────── フロントページの続き (72)発明者 千賀 匡悟 愛知県西春日井郡西枇杷島町字旭町3丁目 1番地 三菱重工業株式会社エアコン製作 所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masago Senga Aichi Prefecture Nishi Kasugai-gun Nishibiwajima-cho, Asahi-cho 3-chome 1 Mitsubishi Heavy Industries Air Conditioning Factory

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 インバータ駆動圧縮機、四方切換弁、室
外機熱交換器、絞り機構、室内機熱交換器、及びアキュ
ムレータによりヒートポンプサイクルを構成してなる空
気調和機において、上記圧縮機と四方切換弁との間から
バイパスさせたバイパス回路に電磁弁および冷媒制御器
を配設し、そのバイパス回路をアキュムレータもどり
管、あるいは上記圧縮機とアキュムレータの間に連結さ
せると共に、制御部から上記圧縮機へ運転要求する周波
数が予め規定された値よりも低いときに、上記電磁弁を
開とすることを特徴とした空気調和機。
1. An air conditioner in which a heat pump cycle is constituted by an inverter-driven compressor, a four-way switching valve, an outdoor unit heat exchanger, a throttle mechanism, an indoor unit heat exchanger, and an accumulator. A solenoid valve and a refrigerant controller are arranged in a bypass circuit bypassed between the valve and the bypass circuit, and the bypass circuit is connected between the accumulator return pipe or the compressor and the accumulator, and from the control unit to the compressor. An air conditioner characterized by opening the solenoid valve when the frequency required for operation is lower than a predetermined value.
JP5146066A 1993-06-17 1993-06-17 Air-conditioning device Withdrawn JPH074766A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5146066A JPH074766A (en) 1993-06-17 1993-06-17 Air-conditioning device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5146066A JPH074766A (en) 1993-06-17 1993-06-17 Air-conditioning device

Publications (1)

Publication Number Publication Date
JPH074766A true JPH074766A (en) 1995-01-10

Family

ID=15399319

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5146066A Withdrawn JPH074766A (en) 1993-06-17 1993-06-17 Air-conditioning device

Country Status (1)

Country Link
JP (1) JPH074766A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006046394A1 (en) * 2004-10-29 2006-05-04 Daikin Industries, Ltd. Refrigeration system
KR20060055152A (en) * 2004-11-18 2006-05-23 엘지전자 주식회사 Multi-airconditioner system
KR100643687B1 (en) * 2004-09-21 2006-11-10 주식회사 대우일렉트로닉스 Air Conditioner Using a Plurality of Compressor
JP2013217595A (en) * 2012-04-10 2013-10-24 Mitsubishi Electric Corp Refrigeration cycle device
KR101414395B1 (en) * 2008-02-20 2014-07-01 엘지전자 주식회사 Air conditioner
DE102015208491A1 (en) 2014-05-08 2015-11-12 Sumitomo Electric Industries, Ltd. Polycrystalline diamond body, cutting tool, wear-resistant tool, grinding tool and method for producing a polycrystalline diamond body

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100643687B1 (en) * 2004-09-21 2006-11-10 주식회사 대우일렉트로닉스 Air Conditioner Using a Plurality of Compressor
WO2006046394A1 (en) * 2004-10-29 2006-05-04 Daikin Industries, Ltd. Refrigeration system
JP2006153418A (en) * 2004-10-29 2006-06-15 Daikin Ind Ltd Refrigeration system
KR20060055152A (en) * 2004-11-18 2006-05-23 엘지전자 주식회사 Multi-airconditioner system
KR101414395B1 (en) * 2008-02-20 2014-07-01 엘지전자 주식회사 Air conditioner
JP2013217595A (en) * 2012-04-10 2013-10-24 Mitsubishi Electric Corp Refrigeration cycle device
DE102015208491A1 (en) 2014-05-08 2015-11-12 Sumitomo Electric Industries, Ltd. Polycrystalline diamond body, cutting tool, wear-resistant tool, grinding tool and method for producing a polycrystalline diamond body

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