JP3219583B2 - Gas conditioner for air conditioner - Google Patents
Gas conditioner for air conditionerInfo
- Publication number
- JP3219583B2 JP3219583B2 JP01693694A JP1693694A JP3219583B2 JP 3219583 B2 JP3219583 B2 JP 3219583B2 JP 01693694 A JP01693694 A JP 01693694A JP 1693694 A JP1693694 A JP 1693694A JP 3219583 B2 JP3219583 B2 JP 3219583B2
- Authority
- JP
- Japan
- Prior art keywords
- heat exchanger
- temperature
- temperature difference
- compressor
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Air Conditioning Control Device (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は空気調和機のガスロー検
知装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas low detecting device for an air conditioner.
【０００２】[0002]
【従来の技術】従来の空気調和機の冷媒回路が図３に示
されている。冷房運転時には、インバータ駆動圧縮機１
から吐出された高温・高圧のガス冷媒は、実線矢印で示
すように、四方弁２を経て室外熱交換器３に入り、ここ
で室外フアン４によって送られる室外空気と熱交換する
ことによって凝縮液化して高圧の液冷媒となる。2. Description of the Related Art FIG. 3 shows a refrigerant circuit of a conventional air conditioner. During the cooling operation, the inverter-driven compressor 1
The high-temperature and high-pressure gas refrigerant discharged from the air-conditioner enters the outdoor heat exchanger 3 through the four-way valve 2 as shown by the solid line arrow, where it exchanges heat with outdoor air sent by the outdoor fan 4 to condense and liquefy. Then, it becomes a high-pressure liquid refrigerant.
【０００３】この液冷媒は絞り５によって絞られること
により断熱膨張して高温・低圧の気液二相となって室内
熱交換器６に入り、ここで室内フアン７によって送られ
る室内空気と熱交換してこれを冷却すると同時に自身は
蒸発気化して低圧のガス冷媒となる。このガス冷媒は四
方弁２を経て圧縮機１に吸入される。The liquid refrigerant is adiabatically expanded by being throttled by the throttle 5 to form a high-temperature / low-pressure gas-liquid two-phase and enters the indoor heat exchanger 6 where it exchanges heat with the indoor air sent by the indoor fan 7. Then, at the same time as cooling it, it evaporates and becomes a low-pressure gas refrigerant. This gas refrigerant is sucked into the compressor 1 via the four-way valve 2.
【０００４】暖房運転時には、四方弁２を切り換えるこ
とによって冷媒は破線矢印で示すように循環し、室内熱
交換器６は凝縮器として機能し、室外熱交換器３は蒸発
器として機能する。In the heating operation, the refrigerant circulates by switching the four-way valve 2 as shown by the dashed arrow, the indoor heat exchanger 6 functions as a condenser, and the outdoor heat exchanger 3 functions as an evaporator.
【０００５】圧縮機１を駆動するためのモータ８には商
用電源９からの電力がインバータ10を介して供給され、
インバータ10によって電流の周波数を増減することによ
って圧縮機１の回転数、即ち、冷媒循環量を連続して無
段階に増減することができるようになっている。A motor 8 for driving the compressor 1 is supplied with electric power from a commercial power supply 9 via an inverter 10.
By increasing / decreasing the frequency of the current by the inverter 10, the rotation speed of the compressor 1, that is, the amount of circulating refrigerant can be continuously increased / decreased.
【０００６】[0006]
【発明が解決しようとする課題】空気調和機の冷媒回路
内に封入されている冷媒が漏洩すると、冷媒循環量が少
なくなり室外熱交換器３及び室内熱交換器６における伝
熱量が低下する。冷媒の漏洩量が増大すると、圧縮機１
の温度が上昇して圧縮機１は破損するに至る。When the refrigerant sealed in the refrigerant circuit of the air conditioner leaks, the amount of circulating refrigerant decreases, and the amount of heat transfer in the outdoor heat exchanger 3 and the indoor heat exchanger 6 decreases. When the leakage amount of the refrigerant increases, the compressor 1
Temperature rises, and the compressor 1 is damaged.
【０００７】しかしながら、従来の空気調和機において
は、冷媒回路からの冷媒の漏洩に基づく冷媒回路内の冷
媒量不足、即ち、ガスロー状態を適確に検出することが
できないため、空気調和機の冷暖房能力の低下や圧縮機
１の損傷が発生するおそれがあった。However, in the conventional air conditioner, it is not possible to accurately detect the shortage of the refrigerant in the refrigerant circuit due to the leakage of the refrigerant from the refrigerant circuit, that is, the gas low state. There is a possibility that the capacity may be reduced or the compressor 1 may be damaged.
【０００８】[0008]
【課題を解決するための手段】本発明は上記課題を解決
するために発明されたものであって、その要旨とすると
ころは、インバータ駆動圧縮機、室内熱交換器、絞り、
室外熱交換器等からなる冷媒回路内に冷媒を封入してな
る空気調和機のガスロー検知装置において、上記室内熱
交換器又は上記室外熱交換器の温度及びこの熱交換器に
吸い込まれる吸込空気の温度を検出する一対の温度検出
手段と、これら一対の温度検出手段によって検出された
温度の差を演算する温度差演算手段と、この温度差演算
手段によって演算された温度差と上記圧縮機の運転周波
数との相関関係からガスロー状態を判定するとともに上
記演算された温度差が第１の基準値以下のときは異常表
示手段に出力し、かつ、上記演算された温度差が第２の
基準値以下のときは上記圧縮機の異常停止手段に出力す
るガスロー判定手段とを具備することを特徴とする空気
調和機のガスロー検知装置にある。SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and its gist is to provide an inverter driven compressor, an indoor heat exchanger, a throttle,
In a gas lawn detecting device of an air conditioner in which a refrigerant is sealed in a refrigerant circuit including an outdoor heat exchanger, the temperature of the indoor heat exchanger or the outdoor heat exchanger and the suction air sucked into the heat exchanger are determined. A pair of temperature detecting means for detecting a temperature, a temperature difference calculating means for calculating a difference between the temperatures detected by the pair of temperature detecting means, a temperature difference calculated by the temperature difference calculating means, and an operation of the compressor. above with judges Gasuro state from the correlation between the frequency
Abnormality table when the calculated temperature difference is less than the first reference value
And outputting the calculated temperature difference to a second
If it is less than the reference value, output to the abnormal stop means of the compressor.
It is in Gasuro detection device for an air conditioner, characterized in that and a that Gasuro determining means.
【０００９】[0009]
【００１０】[0010]
【作用】本発明においては、室内熱交換器又は室外熱交
換器の温度及びこの熱交換器に吸い込まれる吸込空気の
温度との間の温度差と圧縮機の運転周波数との相関関係
からガスロー状態を判定する。According to the present invention, the gas low state is obtained from the correlation between the temperature of the indoor heat exchanger or the outdoor heat exchanger and the temperature of the suction air sucked into the heat exchanger and the operating frequency of the compressor. Is determined.
【００１１】そして、温度差が第１の基準値以下のとき
は異常表示手段によって異常を表示し、温度差が第２の
基準値以下のときは異常停止手段によって圧縮機を異常
停止する。When the temperature difference is equal to or less than the first reference value, an abnormality is displayed by the abnormality display means, and when the temperature difference is equal to or less than the second reference value, the compressor is abnormally stopped by the abnormal stop means.
【００１２】[0012]
【実施例】本発明の１実施例が図１及び図２に示されて
いる。図１に示すように、室内熱交換器６に吸い込まれ
る吸込空気の温度を検出する温度検出手段11及び室内熱
交換器６の温度を検出する温度検出手段12の検出温度は
温度差演算手段13に入力されて、ここでこれら検出温度
の温度差が演算される。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIGS. As shown in FIG. 1, the temperature detected by the temperature detecting means 11 for detecting the temperature of the intake air sucked into the indoor heat exchanger 6 and the temperature detecting means 12 for detecting the temperature of the indoor heat exchanger 6 is calculated by a temperature difference calculating means , Where the temperature difference between these detected temperatures is calculated.
【００１３】演算された温度差はガスロー判定手段14に
入力され、ガスロー判定手段14はこの温度差とインバー
タ10から入力された圧縮機１の運転周波数との相関関係
からガスロー状態を判定する。The calculated temperature difference is inputted to the gas low judging means 14, which judges the gas low state from the correlation between the temperature difference and the operating frequency of the compressor 1 inputted from the inverter 10.
【００１４】冷媒回路内に正規冷媒量が封入されている
場合には、図２に示すように、圧縮機１の運転周波数の
増大に伴って室内熱交換器６の吸込空気温度と室内熱交
換器６の温度との間の温度差は実線イに示すように変化
する。When the normal refrigerant amount is sealed in the refrigerant circuit, as shown in FIG. 2, the suction air temperature of the indoor heat exchanger 6 and the indoor heat exchange with the increase of the operating frequency of the compressor 1 are increased. The temperature difference from the temperature of the vessel 6 changes as shown by the solid line A.
【００１５】そして、冷媒の漏洩量の増大に伴って温度
差は図２に破線ロ、ハに示すように次第に小さくなる。
従って、ガスロー判定手段14に図２に示す相関関係を予
め記憶させて置くことによってガスロー状態を判定する
ことができる。The temperature difference gradually decreases as the amount of refrigerant leakage increases, as indicated by broken lines b and c in FIG.
Therefore, the gas low state can be determined by storing the correlation shown in FIG. 2 in advance in the gas low determination means 14.
【００１６】そして、温度差が第１基準値設定手段15か
ら入力された第１の基準値（例えば、封入冷媒量が正規
量の70％の場合の値で図２に線ニで示されている）以下
に低下したとき、ガスロー判定手段14は異常表示手段16
に出力して、これに異常表示させる。The temperature difference is a first reference value input from the first reference value setting means 15 (for example, a value when the amount of the charged refrigerant is 70% of the normal amount, which is indicated by a line d in FIG. 2). When the value falls below, the gas low judging means 14
And output an error message.
【００１７】また、温度差が第２基準値設定手段17から
入力された第２の基準値( 例えば、封入冷媒量が正規の
50％の場合の値で図２に線ホで示されている）以下に低
下したとき、ガスロー判定手段14は異常停止手段18に出
力する。すると、異常停止手段18はインバータ10に指令
して圧縮機１の運転周波数を零として圧縮機１を停止す
る。Further, the temperature difference is calculated based on the second reference value (for example, if the amount of the charged refrigerant is a regular value) inputted from the second reference value setting means 17.
If the value falls below 50% (indicated by the line E in FIG. 2 at the value of 50%), the gas low judging means 14 outputs to the abnormal stopping means 18. Then, the abnormal stop means 18 instructs the inverter 10 to stop the compressor 1 by setting the operating frequency of the compressor 1 to zero.
【００１８】なお、インバータ10への電力供給を遮断す
ることによって圧縮機１を停止しても良い。また、室外
熱交換器３の温度とその吸込空気温度との間の温度差に
基づいてガスロー状態を判定することもできる。The compressor 1 may be stopped by shutting off the power supply to the inverter 10. Further, the gas low state can be determined based on the temperature difference between the temperature of the outdoor heat exchanger 3 and the temperature of the intake air.
【００１９】[0019]
【発明の効果】本発明においては、室内熱交換器又は室
外熱交換器の温度とこの熱交換器に吸い込まれる吸込空
気の温度との間の温度差と圧縮機の運転周波数との相関
関係からガスロー状態を判定しているので、冷媒の漏洩
等に基づく冷媒封入量の不足を適確に検知することがで
きる。In the present invention, correlation between the operating frequency of the temperature difference between the compressor between the temperature of the indoor heat exchanger or the outdoor heat exchanger and the temperature of the intake air drawn into the heat exchanger Since the gas low state is determined from the above, it is possible to accurately detect the shortage of the amount of the charged refrigerant due to the leakage of the refrigerant or the like.
【００２０】温度差が第１の基準値以下のとき異常表示
し、温度差が第２の基準値以下のとき圧縮機を異常停止
するので、ガスロー状態に起因する冷暖房能力の低下及
び圧縮機の損傷を未然に防止できる。[0020] When the temperature difference is less than the first reference value abnormalities displayed, the temperature difference is the second reference value or less when Runode abnormally stopped <br/> the compressor, the cooling and heating capabilities caused by Gasuro state Dropping and damage to the compressor can be prevented.
【図１】本発明の第１の実施例を示す系統図である。FIG. 1 is a system diagram showing a first embodiment of the present invention.
【図２】上記実施例における温度差と圧縮機の運転周波
数との相関関係を示す線図である。FIG. 2 is a diagram showing a correlation between a temperature difference and an operating frequency of a compressor in the embodiment.
【図３】従来の空気調和機の冷媒回路図である。FIG. 3 is a refrigerant circuit diagram of a conventional air conditioner.
１ 圧縮機 ８ モータ 10 インバータ ６ 室内熱交換器 ５ 絞り ３ 室外熱交換器 11 吸込空気温度検出手段 12 室内熱交換器温度検出手段 13 温度差演算手段 14 ガスロー判定手段 DESCRIPTION OF SYMBOLS 1 Compressor 8 Motor 10 Inverter 6 Indoor heat exchanger 5 Restrictor 3 Outdoor heat exchanger 11 Suction air temperature detecting means 12 Indoor heat exchanger temperature detecting means 13 Temperature difference calculating means 14 Gas low judging means
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) F25B 49/02 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) F25B 49/02
Claims (1)
絞り、室外熱交換器等からなる冷媒回路内に冷媒を封入
してなる空気調和機のガスロー検知装置において、上記
室内熱交換器又は上記室外熱交換器の温度及びこの熱交
換器に吸い込まれる吸込空気の温度を検出する一対の温
度検出手段と、これら一対の温度検出手段によって検出
された温度の差を演算する温度差演算手段と、この温度
差演算手段によって演算された温度差と上記圧縮機の運
転周波数との相関関係からガスロー状態を判定するとと
もに上記演算された温度差が第１の基準値以下のときは
異常表示手段に出力し、かつ、上記演算された温度差が
第２の基準値以下のときは上記圧縮機の異常停止手段に
出力するガスロー判定手段とを具備することを特徴とす
る空気調和機のガスロー検知装置。1. An inverter-driven compressor, an indoor heat exchanger,
In a gas lawn detection device for an air conditioner in which a refrigerant is sealed in a refrigerant circuit including a throttle and an outdoor heat exchanger, the temperature of the indoor heat exchanger or the outdoor heat exchanger and the suction sucked into the heat exchanger. A pair of temperature detecting means for detecting the temperature of the air; a temperature difference calculating means for calculating a difference between the temperatures detected by the pair of temperature detecting means; a temperature difference calculated by the temperature difference calculating means; When the gas low state is determined from the correlation with the operating frequency of
When the calculated temperature difference is equal to or less than the first reference value
Output to the abnormality display means, and the calculated temperature difference is
When the pressure is equal to or less than the second reference value, the abnormal stop means of the compressor is used.
A gas law detecting device for an air conditioner, comprising: a gas law judging means for outputting .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01693694A JP3219583B2 (en) | 1994-01-18 | 1994-01-18 | Gas conditioner for air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01693694A JP3219583B2 (en) | 1994-01-18 | 1994-01-18 | Gas conditioner for air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07208838A JPH07208838A (en) | 1995-08-11 |
| JP3219583B2 true JP3219583B2 (en) | 2001-10-15 |
Family
ID=11930016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP01693694A Expired - Lifetime JP3219583B2 (en) | 1994-01-18 | 1994-01-18 | Gas conditioner for air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3219583B2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10122711A (en) * | 1996-10-18 | 1998-05-15 | Matsushita Electric Ind Co Ltd | Refrigerating cycle control device |
| JP3166731B2 (en) * | 1998-09-28 | 2001-05-14 | ダイキン工業株式会社 | Air conditioner |
| JP2004162979A (en) * | 2002-11-12 | 2004-06-10 | Daikin Ind Ltd | Air conditioner |
| CN100451473C (en) * | 2006-10-12 | 2009-01-14 | 珠海格力电器股份有限公司 | Air conditioner with refrigerant lack fault detection function and fault detection method |
| JP4990702B2 (en) * | 2007-07-19 | 2012-08-01 | シャープ株式会社 | Refrigerant leak detection device, air conditioner, and refrigerant leak detection method |
| CN103375874B (en) * | 2012-04-23 | 2016-03-02 | 珠海格力电器股份有限公司 | Air conditioner and refrigerant circulation abnormity protection control method of air conditioner |
| JP7085405B2 (en) * | 2018-05-15 | 2022-06-16 | 三菱重工サーマルシステムズ株式会社 | Heat source system, control device, heat source system operation method and program |
-
1994
- 1994-01-18 JP JP01693694A patent/JP3219583B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07208838A (en) | 1995-08-11 |
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