JPH07218059A - Air conditioner provided with reverse rotation-preventing function - Google Patents
Air conditioner provided with reverse rotation-preventing functionInfo
- Publication number
- JPH07218059A JPH07218059A JP1080194A JP1080194A JPH07218059A JP H07218059 A JPH07218059 A JP H07218059A JP 1080194 A JP1080194 A JP 1080194A JP 1080194 A JP1080194 A JP 1080194A JP H07218059 A JPH07218059 A JP H07218059A
- Authority
- JP
- Japan
- Prior art keywords
- compressor
- pressure
- reverse rotation
- air conditioner
- stopped
- 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.)
- Pending
Links
Landscapes
- Control Of Positive-Displacement Pumps (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、回転圧縮方向が定まっ
ている回転圧縮機を用いた空気調和機において、圧縮機
の吐出部または、吸入部に配設した圧力検知ポートよ
り、吐出圧力Ｐｄ又は、吸入圧力Ｐｓのどちらか一方を
検知し、圧縮機の停止時から起動後の指定時間における
圧力変化率を用いて条件判定、すなわち冷凍サイクルの
圧力状態により圧縮機の回転方向を検知し逆回転を防止
する装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner using a rotary compressor having a fixed rotary compression direction, and a discharge pressure Pd from a pressure detection port provided at a discharge part or a suction part of the compressor. Alternatively, either one of the suction pressure Ps is detected, and the condition change is made by using the pressure change rate from the time when the compressor is stopped to the specified time after starting, that is, the direction of rotation of the compressor is detected depending on the pressure state of the refrigeration cycle and the reverse. A device for preventing rotation.
【０００２】[0002]
【従来の技術】従来の回転圧縮方向が定まっている回転
圧縮機を用いた空気調和機は、圧縮機に投入される三相
電源に逆相リレーを取付け、圧縮機に投入される三相電
源の各相が正相か否か判断し圧縮機の逆回転を検知して
いる。又、特開昭54−154810号公報では、圧縮機起動後
の圧力が吐出圧力より吸入圧力が高い圧力となった時に
圧縮機の逆回転と判断し、圧縮機を停止させている。2. Description of the Related Art An air conditioner using a conventional rotary compressor whose rotary compression direction is fixed has a three-phase power supply which is supplied to the compressor by attaching a negative phase relay to a three-phase power supply which is supplied to the compressor. The reverse rotation of the compressor is detected by determining whether each phase is a positive phase. Further, in Japanese Patent Application Laid-Open No. 54-154810, when the pressure after starting the compressor becomes higher than the discharge pressure, the suction pressure is judged to be the reverse rotation of the compressor, and the compressor is stopped.
【０００３】[0003]
【発明が解決しようとする課題】前記の回転圧縮方向が
定まっている回転圧縮機を用いた空気調和機では、圧縮
機に投入される三相電源の各相を逆相リレーにより正相
か否かを判断し圧縮機の逆回転を防止していた。この方
法では、３ＫＶ・６ＫＶの高電圧仕様の冷凍装置に使用
できる逆相リレーがないため、圧縮機の逆回転を検知す
ることはできない。In an air conditioner using a rotary compressor whose rotary compression direction is fixed, whether each phase of a three-phase power source to be supplied to the compressor is positive or negative by a reverse phase relay. It was judged that it was preventing the compressor from rotating in the reverse direction. This method cannot detect the reverse rotation of the compressor because there is no reverse-phase relay that can be used in the refrigeration system with high voltage specifications of 3KV and 6KV.
【０００４】本発明の目的は、回転圧縮方向が定まって
いる回転圧縮機を用いた空気調和機において、冷凍サイ
クルの圧力を検知することにより、圧縮機の逆回転を防
止し、圧縮機に投入される三相電源の電圧にかかわらず
圧縮機の逆回転を検知することを可能とすることにあ
る。An object of the present invention is to prevent reverse rotation of a compressor by detecting the pressure of a refrigeration cycle in an air conditioner using a rotary compressor whose rotational compression direction is fixed, and to put the compressor into the compressor. It is possible to detect the reverse rotation of the compressor regardless of the voltage of the three-phase power supply.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に、本発明は回転圧縮方向が定まっている回転圧縮機を
用いた空気調和機において、圧縮機吐出部又は、吸入部
どちらか一方に配設した圧力検知ポートより、吐出圧力
Ｐｄ又は、吸入圧力Ｐｓの圧力を、圧縮機の停止時から
起動後までの指定時間において検知し圧力変化率が、吐
出圧力Ｐｄを検知している場合、圧力変化率が負の時、
また吸入圧力Ｐｓを検知している場合、圧力変化率が正
の時、圧縮機を停止させ圧縮機の逆回転を防止する。In order to achieve the above object, the present invention relates to an air conditioner using a rotary compressor having a fixed rotary compression direction, which is provided in either the compressor discharge part or the suction part. When the discharge pressure Pd or the suction pressure Ps is detected from the provided pressure detection port in a specified time from the time the compressor is stopped to the time it is started, and the pressure change rate detects the discharge pressure Pd, When the pressure change rate is negative,
When the suction pressure Ps is detected, when the rate of pressure change is positive, the compressor is stopped to prevent reverse rotation of the compressor.
【０００６】[0006]
（１）回転圧縮方向が定まっている回転圧縮機を用いた
空気調和機において、圧縮機の吐出部と吸入部にそれぞ
れ配設した圧力検知ポートより吐出圧力Ｐｄと吸入圧力
Ｐｓの圧力差ΔＰ＝Ｐｄ−Ｐｓを検知し、圧縮機停止時
の圧力差ΔＰ1 と起動直後の圧力差ΔＰ2 を比較し、Δ
Ｐ1＞ΔＰ2となった時、圧縮機を停止させ圧縮機の逆回
転を防止する。(1) In an air conditioner using a rotary compressor with a fixed rotary compression direction, a pressure difference ΔP = between the discharge pressure Pd and the suction pressure Ps is obtained from pressure detection ports respectively provided in the discharge part and the suction part of the compressor. Detecting Pd-Ps, comparing the pressure difference ΔP 1 when the compressor is stopped with the pressure difference ΔP 2 immediately after starting,
When P 1 > ΔP 2 , the compressor is stopped and reverse rotation of the compressor is prevented.
【０００７】（２）回転圧縮方向が定まっている回転圧
縮機を用いた空気調和機において、圧縮機の吐出部に配
設した圧力検知ポートより吐出圧力Ｐｄを検知し、圧縮
機停止時から起動後の指定時間Δｔにおいて、吐出圧力
の圧力変化率ΔＰを用いて、ΔＰ／Δｔ＜０となった
時、圧縮機を停止させ圧縮機の逆回転を防止する。(2) In an air conditioner using a rotary compressor whose rotational compression direction is fixed, the discharge pressure Pd is detected from a pressure detection port provided in the discharge part of the compressor, and the compressor is started when the compressor is stopped. At a later specified time Δt, the pressure change rate ΔP of the discharge pressure is used, and when ΔP / Δt <0, the compressor is stopped and reverse rotation of the compressor is prevented.
【０００８】（３）回転圧縮方向が定まっている回転圧
縮機を用いた空気調和機において、圧縮機の吸入部に配
設した圧力検知ポートより吸入圧力Ｐｓを検知し、圧縮
機停止時から起動後の指定時間Δｔにおいて、吸入圧力
の圧力変化率ΔＰを用いて、ΔＰ／Δｔ＞０となった
時、圧縮機を停止させ圧縮機の逆回転を防止する。(3) In an air conditioner using a rotary compressor having a fixed rotary compression direction, the suction pressure Ps is detected from a pressure detection port provided in the suction portion of the compressor, and the compressor is started when the compressor is stopped. At a later specified time Δt, the pressure change rate ΔP of the suction pressure is used, and when ΔP / Δt> 0, the compressor is stopped and reverse rotation of the compressor is prevented.
【０００９】[0009]
【実施例】図１は、本発明の回転圧縮方向が定まってい
る回転圧縮機を用いた空気調和機の冷凍サイクル系統図
である。圧縮機１により圧縮された高温・高圧ガス冷媒
は、逆止弁２を通過し凝縮器３で冷却水と熱交換され高
圧液冷媒となる。高圧液冷媒は、膨張弁４により減圧さ
れ蒸発器５で冷水と熱交換され低温・低圧ガス冷媒とな
り、圧縮機１に戻る冷凍サイクルである。本発明では、
圧縮機１の吐出部に圧力検知ポート６，吸入部に圧力検
知ポート７を配設し、冷凍サイクルの圧力を検知するこ
とにより圧縮機の逆回転を検知し運転を停止させる逆回
転防止機能を備えた冷凍装置である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a refrigeration cycle system diagram of an air conditioner using a rotary compressor having a fixed rotary compression direction according to the present invention. The high temperature / high pressure gas refrigerant compressed by the compressor 1 passes through the check valve 2 and exchanges heat with the cooling water in the condenser 3 to become a high pressure liquid refrigerant. The high-pressure liquid refrigerant is decompressed by the expansion valve 4, exchanges heat with cold water in the evaporator 5, becomes low-temperature low-pressure gas refrigerant, and returns to the compressor 1 in the refrigeration cycle. In the present invention,
A pressure detection port 6 is provided at the discharge part of the compressor 1 and a pressure detection port 7 is provided at the suction part, and a reverse rotation prevention function is detected by detecting the reverse rotation of the compressor by detecting the pressure of the refrigeration cycle and stopping the operation. It is a refrigerating device provided.
【００１０】図２を用いて圧縮機逆回転検知方法につい
て説明する。図１の圧力検知ポート６および圧力検知ポ
ート７で検知した吐出圧力Ｐｄ・吸入圧力Ｐｓ・圧力差
ΔＰ1〜3 を図２に示す。圧縮機が正回転の場合、圧縮
機起動後吐出圧力Ｐｄは上昇、吸入圧力Ｐｓは低下、圧
力差ΔＰ3 は増加する。一方、圧縮機が逆回転の場合、
圧縮機起動後吐出圧力Ｐｄは低下、吸入圧力Ｐｓは上昇
圧力差ΔＰ2 は減少する。本結果は、圧縮機停止時の吐
出圧力Ｐｄと吸入圧力Ｐｓの状態が、Ｐｄ＞Ｐｓ，Ｐｄ
＝Ｐｓ，Ｐｄ＜Ｐｓの全ての場合、同様である。以上よ
り本発明では、圧縮機１の起動１秒前の圧力差と圧縮機
１の起動直後、例えば、０〜５秒間においての圧力差を
比較し、圧縮機１の起動直後の圧力差が小さい時、圧縮
機１を停止する。A compressor reverse rotation detection method will be described with reference to FIG. FIG. 2 shows the discharge pressure Pd, the suction pressure Ps, and the pressure differences ΔP 1 to 3 detected by the pressure detection port 6 and the pressure detection port 7 in FIG. 1 . When the compressor is rotating normally, the discharge pressure Pd after starting the compressor increases, the suction pressure Ps decreases, and the pressure difference ΔP 3 increases. On the other hand, if the compressor is rotating in reverse,
After the compressor is started, the discharge pressure Pd decreases, and the suction pressure Ps increases and the pressure difference ΔP 2 decreases. This result shows that the states of the discharge pressure Pd and the suction pressure Ps when the compressor is stopped are Pd> Ps and Pd.
The same applies in all cases of = Ps and Pd <Ps. As described above, in the present invention, the pressure difference immediately after the start of the compressor 1 is compared with the pressure difference immediately after the start of the compressor 1, for example, 0 to 5 seconds, and the pressure difference immediately after the start of the compressor 1 is small. At this time, the compressor 1 is stopped.
【００１１】また、実施例の応用として、図１の圧縮機
１吐出部にのみ圧力検知ポート６を配設し本検知ポート
より検知した吐出圧力を圧縮機１の起動時から圧縮機１
の起動後指定時間Δｔ（例えば０〜５秒間）の圧力変化
率ΔＰを用い、ΔＰ／Δｔ＜０の時、圧縮機１を停止す
る。Further, as an application of the embodiment, the pressure detection port 6 is provided only in the discharge part of the compressor 1 of FIG. 1, and the discharge pressure detected from this detection port is detected from the start of the compressor 1 to the compressor 1.
When the pressure change rate ΔP of the designated time Δt (for example, 0 to 5 seconds) after the startup of is used, and when ΔP / Δt <0, the compressor 1 is stopped.
【００１２】また、吸入圧力のみ検知した場合も同様
に、図１の圧縮機１の吸入部にのみ圧力検知ポート７を
配設し本検知ポートより検知した吸入圧力を圧縮機１の
起動時から、圧縮機１の起動後指定時間Δｔ（例えば０
〜５秒間）の圧力変化率ΔＰを用い、ΔＰ／Δｔ＞０の
時、圧縮機１を停止する。また、本制御は、圧縮機停止
時の圧力差と起動直後の圧力差を比較し、圧縮機の逆回
転を検知するため差圧スイッチを用い、制御することな
どは不可である。Similarly, when only the suction pressure is detected, the pressure detection port 7 is provided only in the suction portion of the compressor 1 shown in FIG. , A specified time Δt after the compressor 1 is started (for example, 0
The pressure change rate ΔP for ˜5 seconds) is used, and when ΔP / Δt> 0, the compressor 1 is stopped. In addition, in this control, it is impossible to compare the pressure difference when the compressor is stopped with the pressure difference immediately after the compressor is started and to use a differential pressure switch to detect the reverse rotation of the compressor, and to perform control.
【００１３】図３に本発明の電源回路部および圧縮機の
逆回転検知制御を示す。高圧検知ポート１７ａおよび低
圧検知ポート１７ｂより検知した吐出圧力Ｐｄと吸入圧
力Ｐｓの圧力差ΔＰ＝Ｐｄ−Ｐｓにおいて圧縮機１が停
止する条件となった時、制御基板８よりリレーコイル９
に通電され、電磁接触器１０の上流部に配設されたリレ
ー接点９ａが開き、電磁接触器１０が非通電になる。従
って、電磁接触器接点１０ａが開き、圧縮機１の電動機
１４が非通電となり圧縮機１は停止する。FIG. 3 shows the reverse rotation detection control of the power supply circuit unit and compressor of the present invention. When the compressor 1 stops under the pressure difference ΔP = Pd−Ps between the discharge pressure Pd and the suction pressure Ps detected from the high pressure detection port 17a and the low pressure detection port 17b, the relay coil 9 is fed from the control board 8
Is energized, the relay contact 9a arranged in the upstream portion of the electromagnetic contactor 10 is opened, and the electromagnetic contactor 10 is de-energized. Therefore, the electromagnetic contactor contact 10a is opened, the electric motor 14 of the compressor 1 is de-energized, and the compressor 1 is stopped.
【００１４】図４に従来の電源回路部および圧縮機の逆
回転検知制御を示す。本制御は、逆相リレー１８で電動
機１４に投入される三相電源が各相共、正相であるか否
か判断する。正相でない時は逆相リレー接点１８ａが開
き、電磁接触器１０が非通電となる。従って、電磁接触
器接点１０ａが開き電動機１４が非通電となり、圧縮機
１は停止する。本制御では、３ＫＶ・６ＫＶの高電圧仕
様の場合、使用できる逆相リレーがないため、高電圧仕
様の対応はできない。FIG. 4 shows the conventional reverse rotation detection control of the power supply circuit section and the compressor. This control determines whether or not the three-phase power supplied to the electric motor 14 by the negative-phase relay 18 is a positive phase for each phase. When it is not in the positive phase, the negative phase relay contact 18a is opened and the electromagnetic contactor 10 is de-energized. Therefore, the electromagnetic contactor contact 10a is opened, the electric motor 14 is de-energized, and the compressor 1 is stopped. With this control, in the case of high voltage specifications of 3KV and 6KV, there is no reverse-phase relay that can be used, so high voltage specifications cannot be supported.
【００１５】[0015]
【発明の効果】本発明によれば、回転圧縮方向が定まっ
ている回転圧縮機を用いた空気調和機において、使用す
る電源電圧にかかわらず冷凍サイクルの圧縮機吐出部ま
たは吸入部どちらか一方に配設した圧力検知ポートより
検知した吐出圧力または吸入圧力を、圧縮機の停止時か
ら圧縮機起動後までの指定時間における圧力変化率を条
件判定することにより圧縮機の逆回転防止が図れる。According to the present invention, in an air conditioner using a rotary compressor whose rotary compression direction is fixed, either the compressor discharge part or the suction part of the refrigeration cycle is used regardless of the power supply voltage used. The reverse rotation of the compressor can be prevented by conditionally determining the discharge pressure or the suction pressure detected from the provided pressure detection port with respect to the pressure change rate in the designated time from the stop of the compressor to the start of the compressor.
【図１】本発明の実施例に係わる空気調和機の冷凍サイ
クル系整図。FIG. 1 is a schematic diagram of a refrigeration cycle system of an air conditioner according to an embodiment of the present invention.
【図２】本発明の実施例，圧縮機の逆回転検知方法の説
明図。FIG. 2 is an explanatory diagram of an embodiment of the present invention and a method for detecting reverse rotation of a compressor.
【図３】本発明の実施例，電源回路部および圧縮機の逆
回転検知制御方式の説明図。FIG. 3 is an explanatory diagram of an embodiment of the present invention, a power supply circuit section, and a reverse rotation detection control system for a compressor.
【図４】従来の電源回路部および圧縮機の逆回転検知制
御方式の説明図。FIG. 4 is an explanatory diagram of a conventional reverse rotation detection control system for a power supply circuit section and a compressor.
１…圧縮機、２…逆止弁、３…凝縮器、４…膨張弁、５
…蒸発器、６…圧力検知ポート（吐出側）、７…圧力検
知ポート（吸入側）。1 ... Compressor, 2 ... Check valve, 3 ... Condenser, 4 ... Expansion valve, 5
... Evaporator, 6 ... Pressure detection port (discharge side), 7 ... Pressure detection port (suction side).
───────────────────────────────────────────────────── フロントページの続き (72)発明者 金子 賢 静岡県清水市村松390番地 株式会社日立 製作所空調システム事業部内 (72)発明者 相山 真之 静岡県清水市村松390番地 日立清水エン ジニアリング株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Ken Kaneko, 390 Muramatsu, Shimizu City, Shizuoka Prefecture, Hitachi Air Conditioning Systems Division (72) Masayuki Aiyama 390, Muramatsu, Shimizu City, Shizuoka Hitachi Shimizu Engineering Co., Ltd. Within the corporation
Claims (1)
た空気調和機において、前記圧縮機の吐出部に圧力検知
ポートを配設し、前記圧縮機の停止時から前記圧縮機の
起動後までの指定時間Δｔにおいて吐出部の圧力検知ポ
ートより検知した吐出圧力の圧力変化率ΔＰを用いてΔ
Ｐ／Δｔ ０の条件判定により前記圧縮機の停止あるい
は、継続運転の判断機能を有したことを特徴とする逆回
転防止機能付空気調和機。1. An air conditioner using a compressor whose rotational compression direction is fixed, wherein a pressure detection port is provided at a discharge portion of the compressor, and after the compressor is stopped, the compressor is started. Up to the specified time Δt until Δ using the pressure change rate ΔP of the discharge pressure detected from the pressure detection port of the discharge part
An air conditioner with a reverse rotation preventing function, which has a function of determining whether the compressor is stopped or continuously operating according to the condition determination of P / Δt 0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1080194A JPH07218059A (en) | 1994-02-02 | 1994-02-02 | Air conditioner provided with reverse rotation-preventing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1080194A JPH07218059A (en) | 1994-02-02 | 1994-02-02 | Air conditioner provided with reverse rotation-preventing function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07218059A true JPH07218059A (en) | 1995-08-18 |
Family
ID=11760444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1080194A Pending JPH07218059A (en) | 1994-02-02 | 1994-02-02 | Air conditioner provided with reverse rotation-preventing function |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07218059A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09145125A (en) * | 1995-11-24 | 1997-06-06 | Matsushita Electric Ind Co Ltd | Air conditioner |
| JPH09280700A (en) * | 1996-04-10 | 1997-10-31 | Denso Corp | Failure detector of air conditioner |
| JP2007147220A (en) * | 2005-11-30 | 2007-06-14 | Matsushita Electric Ind Co Ltd | Air conditioner |
| CN100356121C (en) * | 2002-09-04 | 2007-12-19 | 日立空调***株式会社 | Refrigerating machine |
| JP2008064331A (en) * | 2006-09-05 | 2008-03-21 | Daikin Ind Ltd | Negative phase detecting device, air conditioner having the same, and negative phase detecting method |
| US7990640B2 (en) | 2006-12-20 | 2011-08-02 | Hitachi Global Storage Technologies, Netherlands, B.V. | Apparatus and method for determining motor spin direction of a hard disk drive |
| JP2013083361A (en) * | 2011-10-06 | 2013-05-09 | Panasonic Corp | Refrigeration cycle device |
| GB2527228B (en) * | 2013-03-11 | 2017-01-04 | Trane Int Inc | Controls and operation of variable frequency drives |
| JP2018152287A (en) * | 2017-03-14 | 2018-09-27 | トヨタ自動車株式会社 | Fuel cell system |
| CN112944647A (en) * | 2021-02-04 | 2021-06-11 | 广州恒星制冷设备集团有限公司 | Embedded heat recovery unit |
-
1994
- 1994-02-02 JP JP1080194A patent/JPH07218059A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09145125A (en) * | 1995-11-24 | 1997-06-06 | Matsushita Electric Ind Co Ltd | Air conditioner |
| JPH09280700A (en) * | 1996-04-10 | 1997-10-31 | Denso Corp | Failure detector of air conditioner |
| CN100356121C (en) * | 2002-09-04 | 2007-12-19 | 日立空调***株式会社 | Refrigerating machine |
| JP2007147220A (en) * | 2005-11-30 | 2007-06-14 | Matsushita Electric Ind Co Ltd | Air conditioner |
| JP4710571B2 (en) * | 2005-11-30 | 2011-06-29 | パナソニック株式会社 | Air conditioner |
| JP2008064331A (en) * | 2006-09-05 | 2008-03-21 | Daikin Ind Ltd | Negative phase detecting device, air conditioner having the same, and negative phase detecting method |
| US7990640B2 (en) | 2006-12-20 | 2011-08-02 | Hitachi Global Storage Technologies, Netherlands, B.V. | Apparatus and method for determining motor spin direction of a hard disk drive |
| JP2013083361A (en) * | 2011-10-06 | 2013-05-09 | Panasonic Corp | Refrigeration cycle device |
| GB2527228B (en) * | 2013-03-11 | 2017-01-04 | Trane Int Inc | Controls and operation of variable frequency drives |
| US10295239B2 (en) | 2013-03-11 | 2019-05-21 | Trane International Inc. | Controls and operation of variable frequency drives |
| US10746448B2 (en) | 2013-03-11 | 2020-08-18 | Trane International Inc. | Controls and operation of variable frequency drives |
| JP2018152287A (en) * | 2017-03-14 | 2018-09-27 | トヨタ自動車株式会社 | Fuel cell system |
| CN112944647A (en) * | 2021-02-04 | 2021-06-11 | 广州恒星制冷设备集团有限公司 | Embedded heat recovery unit |
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