JPH09113079A - Refrigerant sealing quantity detector for air conditioner - Google Patents
Refrigerant sealing quantity detector for air conditionerInfo
- Publication number
- JPH09113079A JPH09113079A JP29488695A JP29488695A JPH09113079A JP H09113079 A JPH09113079 A JP H09113079A JP 29488695 A JP29488695 A JP 29488695A JP 29488695 A JP29488695 A JP 29488695A JP H09113079 A JPH09113079 A JP H09113079A
- Authority
- JP
- Japan
- Prior art keywords
- refrigerant
- pressure
- detecting
- sensor
- air
- 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- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/04—Refrigerant level
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は空気調和機の冷媒回
路内に封入された非共沸混合冷媒の量を検知する装置に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting the amount of non-azeotropic mixed refrigerant enclosed in a refrigerant circuit of an air conditioner.
【０００２】[0002]
【従来の技術及びその課題】近年、オゾン層の破壊を防
止するため、空気調和機の冷媒回路内に単一のフロンに
代えて非共沸混合冷媒を封入することが推奨されてい
る。一方、空気調和機の冷媒回路内に冷媒を封入する
際、適正封入量より過大となったり、過少となる場合が
あり、また、封入時には適正量であっても冷媒配管の継
手等から冷媒が漏洩することによって封入量が過少とな
る場合が発生する。2. Description of the Related Art In recent years, in order to prevent the destruction of the ozone layer, it has been recommended to enclose a non-azeotropic mixed refrigerant in the refrigerant circuit of an air conditioner instead of a single CFC. On the other hand, when the refrigerant is filled in the refrigerant circuit of the air conditioner, it may be larger or smaller than the proper amount to be filled. The leakage may cause an excessively small filling amount.
【０００３】冷媒封入量が過大又は過少となると、空気
調和機に種々の不具合が発生するが、非共沸混合冷媒が
封入されている場合には空気調和機の運転中これを精度
良く検出することができず、従って、冷媒封入量の過大
又は過少に基づく種々の不具合を未然に防止することが
できなかった。When the amount of refrigerant filled is too large or too small, various problems occur in the air conditioner. However, when a non-azeotropic mixed refrigerant is filled, this can be detected accurately during operation of the air conditioner. Therefore, it is impossible to prevent various problems caused by the excessively large amount or the too small amount of the enclosed refrigerant.
【０００４】[0004]
【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、第１の発明の要旨
とするところは、圧縮機、凝縮器、絞り機構、蒸発器等
からなる冷媒回路内に非共沸混合冷媒を封入してなる空
気調和機において、上記凝縮器の吸込空気温度及び風量
をそれぞれ検出するセンサと、上記冷媒回路内の高圧冷
媒圧力を検出するセンサと、これらセンサによって検出
された吸込空気温度及び風量と高圧冷媒圧力との相関関
係から上記非共沸混合冷媒の封入量を検知する冷媒封入
量検知装置を設けたことを特徴とする空気調和機の冷媒
封入量検知装置にある。The present invention has been invented to solve the above-mentioned problems, and the gist of the first invention is to provide a compressor, a condenser, a throttle mechanism, an evaporator, etc. In an air conditioner in which a non-azeotropic mixed refrigerant is sealed in a refrigerant circuit consisting of a sensor for detecting the suction air temperature and the air volume of the condenser, and a sensor for detecting the high pressure refrigerant pressure in the refrigerant circuit. , An air conditioner characterized by providing a refrigerant enclosure amount detection device for detecting the enclosure amount of the non-azeotropic mixed refrigerant from the correlation between the intake air temperature and the air volume detected by these sensors and the high pressure refrigerant pressure. It is in the refrigerant amount detection device.
【０００５】しかして、封入量検知手段は各センサによ
って検出された凝縮器の吸込空気温度及び風量並びに高
圧冷媒圧力との相関関係から非共沸混合冷媒の封入量を
検知する。Therefore, the enclosed amount detecting means detects the enclosed amount of the non-azeotropic mixed refrigerant from the correlation with the intake air temperature and the air amount of the condenser detected by each sensor and the high pressure refrigerant pressure.
【０００６】第２の発明の要旨とするところは、圧縮
機、凝縮器、絞り機構、蒸発器等からなる冷媒回路内に
非共沸混合冷媒を封入してなる空気調和機において、上
記凝縮器における冷媒飽和温度を検出するセンサと、上
記冷媒回路内の高圧冷媒圧力を検出するセンサと、これ
らセンサで検出された冷媒飽和温度と高圧冷媒圧力との
相関関係から上記非共沸混合冷媒の封入量を検知する冷
媒封入量検知装置を設けたことを特徴とする空気調和機
の冷媒封入量検知装置にある。The gist of the second aspect of the present invention is to provide an air conditioner in which a non-azeotropic mixed refrigerant is enclosed in a refrigerant circuit including a compressor, a condenser, a throttle mechanism, an evaporator, and the like. , A sensor for detecting the refrigerant saturation temperature in the refrigerant circuit, a sensor for detecting the high pressure refrigerant pressure in the refrigerant circuit, the inclusion of the non-azeotropic mixed refrigerant from the correlation between the refrigerant saturation temperature and high pressure refrigerant pressure detected by these sensors A refrigerant enclosed amount detecting device for an air conditioner, which is provided with a refrigerant enclosed amount detecting device for detecting an amount.
【０００７】しかして、冷媒封入量検知手段は各センサ
によって検出された冷媒飽和温度と高圧冷媒圧力との相
関関係から冷媒封入量検知する。Therefore, the refrigerant enclosed amount detecting means detects the refrigerant enclosed amount from the correlation between the refrigerant saturation temperature detected by each sensor and the high pressure refrigerant pressure.
【０００８】[0008]
【発明の実施の形態】本発明の第１の実施形態が図１な
いし図４に示されている。図１に示すように、圧縮機
１、凝縮器２、絞り機構３、蒸発器４を冷媒配管で接続
してなる冷媒回路内にはR407C 等の非共沸混合冷媒が封
入されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention is shown in FIGS. As shown in FIG. 1, a non-azeotropic mixed refrigerant such as R407C is enclosed in a refrigerant circuit formed by connecting a compressor 1, a condenser 2, a throttle mechanism 3, and an evaporator 4 with a refrigerant pipe.
【０００９】空気調和機の運転時、圧縮機１から吐出さ
れたガス冷媒は矢印で示すように、凝縮器２に入り、こ
こでフアン５により送られる外気に放熱することによっ
て凝縮液化する。During operation of the air conditioner, the gas refrigerant discharged from the compressor 1 enters the condenser 2 as shown by the arrow, and radiates heat to the outside air sent by the fan 5 to be condensed and liquefied.
【００１０】この液冷媒は絞り機構３を流過する過程で
断熱膨張した後、蒸発器４に入り、ここでフアン６によ
り送られる室内空気を冷却することによって蒸発気化し
て圧縮機１に戻る。This liquid refrigerant is adiabatically expanded in the process of passing through the throttling mechanism 3, and then enters the evaporator 4, where the room air sent by the fan 6 is cooled to evaporate and return to the compressor 1. .
【００１１】凝縮器２に吸い込まれる吸込空気の温度を
検出する温度センサ７及びこの吸込空気の風量を検出す
る風量センサ８及び冷媒回路内の高圧冷媒の圧力を検出
する圧力センサ９の検出値は冷媒封入量検知装置10に入
力され、ここでこれら検出値の相関関係から非共沸混合
冷媒の冷媒封入量が検知される。The detection values of the temperature sensor 7 for detecting the temperature of the suction air sucked into the condenser 2, the air volume sensor 8 for detecting the air volume of the suction air, and the pressure sensor 9 for detecting the pressure of the high pressure refrigerant in the refrigerant circuit are: It is input to the refrigerant enclosure amount detection device 10, where the refrigerant enclosure amount of the non-azeotropic mixed refrigerant is detected from the correlation of these detection values.
【００１２】空気調和機の運転時、運転条件が同じであ
っても冷媒封入量の過不足により非共沸混合冷媒の組成
比が変化し、図２に示すように、封入量が過大であれば
高圧冷媒圧力が上昇し、封入量が過少であれば高圧冷媒
圧力が低下する。During operation of the air conditioner, even if the operating conditions are the same, the composition ratio of the non-azeotropic mixed refrigerant changes due to an excess or deficiency of the refrigerant charge amount, and as shown in FIG. For example, the pressure of the high-pressure refrigerant rises, and if the filling amount is too small, the pressure of the high-pressure refrigerant decreases.
【００１３】また、高圧冷媒圧力は空気調和機の運転条
件に応じて変化し、図３に示すように、凝縮器２に吸い
込まれる吸込空気温度の上昇に応じて上昇し、かつ、図
４に示すように、吸込空気風量の増大に応じて低下す
る。The pressure of the high-pressure refrigerant changes according to the operating conditions of the air conditioner, increases as the temperature of the suction air sucked into the condenser 2 rises, as shown in FIG. As shown, it decreases as the intake air volume increases.
【００１４】従って、冷媒封入量検知装置10において、
高圧冷媒圧力を吸込空気温度及び風量により補正するこ
とによって冷媒封入量の過不足を検知することができ、
この過不足は表示器10A に表示される。Therefore, in the refrigerant enclosure amount detection device 10,
By correcting the high-pressure refrigerant pressure with the intake air temperature and the air volume, it is possible to detect the excess or deficiency of the refrigerant charge amount.
This excess or deficiency is displayed on the display 10A.
【００１５】本発明の第２の実施形態が図５に示されて
いる。この第２の実施形態においては、凝縮器２の吸込
空気温度及び風量に代えて凝縮器２における冷媒飽和温
度を検出する熱交センサ11の検出値が冷媒封入量検知装
置12に入力され、ここで冷媒回路内の高圧冷媒圧力を検
出する圧力センサ９の検出値との相関関係から非共沸混
合冷媒の封入量が検知されるようになっている。他の構
成は図１に示す第１の実施形態と同様であり、対応する
部材には同じ符号を付してその説明を省略する。A second embodiment of the invention is shown in FIG. In the second embodiment, the detection value of the heat exchange sensor 11 that detects the refrigerant saturation temperature in the condenser 2 instead of the intake air temperature and the air volume of the condenser 2 is input to the refrigerant enclosure amount detection device 12, The amount of non-azeotropic mixed refrigerant enclosed is detected from the correlation with the detection value of the pressure sensor 9 for detecting the high pressure refrigerant pressure in the refrigerant circuit. Other configurations are the same as those of the first embodiment shown in FIG. 1, and corresponding members are denoted by the same reference numerals and description thereof will be omitted.
【００１６】しかして、熱交センサ11によって凝縮器２
における非共沸混合冷媒の気液二相域における冷媒飽和
温度を検出することができ、この冷媒飽和温度と高圧冷
媒圧力との相関関係は冷媒封入量の過不足によって変化
するので、高圧冷媒圧力と冷媒飽和温度の検出値をマイ
コンで処理し、所定の関係式により演算することによっ
て冷媒封入量の過不足を算出することができ、この算出
値は表示器12A に表示される。Then, the condenser 2 is heated by the heat exchange sensor 11.
The refrigerant saturation temperature in the gas-liquid two-phase region of the non-azeotropic mixed refrigerant in can be detected, and the correlation between this refrigerant saturation temperature and the high-pressure refrigerant pressure changes depending on whether the refrigerant filling amount is high or low. By processing the detected value of the refrigerant saturation temperature with a microcomputer and calculating it by a predetermined relational expression, it is possible to calculate the excess or deficiency of the refrigerant enclosed amount, and this calculated value is displayed on the display 12A.
【００１７】[0017]
【発明の効果】第１の発明においては、凝縮器の吸込空
気温度及び風量並びに高圧冷媒圧力との相関関係から非
共沸混合冷媒の封入量を検知できるため、空気調和機を
運転しながら非共沸混合冷媒の封入量の過不足を精度良
く検知することができ、従って、冷媒封入量の過不足に
よる種々の故障を未然に防止できる。According to the first aspect of the present invention, the amount of non-azeotropic mixed refrigerant enclosed can be detected from the correlation with the intake air temperature and air flow of the condenser and the high pressure refrigerant pressure. It is possible to accurately detect the excess or deficiency of the enclosed amount of the azeotropic mixed refrigerant, and thus it is possible to prevent various failures due to the excess or deficiency of the enclosed amount of the refrigerant.
【００１８】第２の発明においては、冷媒飽和温度と高
圧冷媒圧力との相関関係から冷媒封入量を検知できるた
め、第１の発明と同様の効果を奏することかできる。In the second aspect of the invention, since the amount of the refrigerant sealed can be detected from the correlation between the refrigerant saturation temperature and the high pressure refrigerant pressure, the same effect as the first invention can be obtained.
【図１】本発明の第１の実施形態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】第１の実施形態における高圧冷媒圧力と冷媒封
入量との関係を示す線図である。FIG. 2 is a diagram showing a relationship between a high pressure refrigerant pressure and a refrigerant charge amount in the first embodiment.
【図３】第１の実施形態における高圧冷媒圧力と吸込空
気温度との関係を示す線図である。FIG. 3 is a diagram showing a relationship between a high pressure refrigerant pressure and a suction air temperature in the first embodiment.
【図４】第１の実施形態における高圧冷媒圧力と吸込空
気風量との関係を示す線図である。FIG. 4 is a diagram showing a relationship between high-pressure refrigerant pressure and intake air volume in the first embodiment.
【図５】本発明の第２の実施形態を示す系統図である。FIG. 5 is a system diagram showing a second embodiment of the present invention.
１ 圧縮機 ２ 凝縮器 ３ 絞り機構 ４ 蒸発器 ７ 吸込空気温度センサ ８ 吸込空気風量センサ ９ 高圧冷媒圧力センサ 10 冷媒封入量検知装置 1 Compressor 2 Condenser 3 Throttle mechanism 4 Evaporator 7 Suction air temperature sensor 8 Suction air flow rate sensor 9 High pressure refrigerant pressure sensor 10 Refrigerant filling amount detection device
Claims (2)
らなる冷媒回路内に非共沸混合冷媒を封入してなる空気
調和機において、 上記凝縮器の吸込空気温度及び風量をそれぞれ検出する
センサと、上記冷媒回路内の高圧冷媒圧力を検出するセ
ンサと、これらセンサによって検出された吸込空気温度
及び風量と高圧冷媒圧力との相関関係から上記非共沸混
合冷媒の封入量を検知する冷媒封入量検知装置を設けた
ことを特徴とする空気調和機の冷媒封入量検知装置。1. An air conditioner in which a non-azeotropic mixed refrigerant is enclosed in a refrigerant circuit composed of a compressor, a condenser, a throttle mechanism, an evaporator and the like, and the suction air temperature and the air volume of the condenser are respectively detected. Sensor, a sensor for detecting the high-pressure refrigerant pressure in the refrigerant circuit, and detects the enclosed amount of the non-azeotropic mixed refrigerant from the correlation between the intake air temperature and the air volume detected by these sensors and the high-pressure refrigerant pressure. A refrigerant enclosure amount detection device for an air conditioner, comprising a refrigerant enclosure amount detection device.
らなる冷媒回路内に非共沸混合冷媒を封入してなる空気
調和機において、 上記凝縮器における冷媒飽和温度を検出するセンサと、
上記冷媒回路内の高圧冷媒圧力を検出するセンサと、こ
れらセンサで検出された冷媒飽和温度と高圧冷媒圧力と
の相関関係から上記非共沸混合冷媒の封入量を検知する
冷媒封入量検知装置を設けたことを特徴とする空気調和
機の冷媒封入量検知装置。2. An air conditioner in which a non-azeotropic mixed refrigerant is enclosed in a refrigerant circuit including a compressor, a condenser, a throttle mechanism, an evaporator, and the like, and a sensor for detecting a refrigerant saturation temperature in the condenser. ,
A sensor for detecting the high pressure refrigerant pressure in the refrigerant circuit, a refrigerant filling amount detection device for detecting the filling amount of the non-azeotropic mixed refrigerant from the correlation between the refrigerant saturation temperature and the high pressure refrigerant pressure detected by these sensors. A refrigerant enclosed amount detection device for an air conditioner, which is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29488695A JPH09113079A (en) | 1995-10-18 | 1995-10-18 | Refrigerant sealing quantity detector for air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29488695A JPH09113079A (en) | 1995-10-18 | 1995-10-18 | Refrigerant sealing quantity detector for air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09113079A true JPH09113079A (en) | 1997-05-02 |
Family
ID=17813529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29488695A Withdrawn JPH09113079A (en) | 1995-10-18 | 1995-10-18 | Refrigerant sealing quantity detector for air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09113079A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006090451A1 (en) * | 2005-02-24 | 2006-08-31 | Mitsubishi Denki Kabushiki Kaisha | Air conditioning system |
| EP1942306A1 (en) * | 2005-10-25 | 2008-07-09 | Mitsubishi Electric Corporation | Air-conditioning apparatus, method of refrigerant filling in air-conditioning apparatus, method of judging state of refrigerant filling in air-conditioning apparatus, and method of refrigerant filling/piping cleaning for air-conditioning apparatus |
| KR100882005B1 (en) * | 2007-06-26 | 2009-02-04 | 고려대학교 산학협력단 | Device for detecting the status of coolant charged in the heat exchange system and method for controllling the same |
| WO2020094007A1 (en) * | 2018-11-07 | 2020-05-14 | 宁波奥克斯电气股份有限公司 | Control method and device for improving refrigeration comfort of inverter air-conditioner, and air conditioner |
| WO2023132010A1 (en) * | 2022-01-05 | 2023-07-13 | 三菱電機株式会社 | Air-conditioning device |
-
1995
- 1995-10-18 JP JP29488695A patent/JPH09113079A/en not_active Withdrawn
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006090451A1 (en) * | 2005-02-24 | 2006-08-31 | Mitsubishi Denki Kabushiki Kaisha | Air conditioning system |
| JPWO2006090451A1 (en) * | 2005-02-24 | 2008-07-17 | 三菱電機株式会社 | Air conditioner |
| JP4503646B2 (en) * | 2005-02-24 | 2010-07-14 | 三菱電機株式会社 | Air conditioner |
| US7987679B2 (en) | 2005-02-24 | 2011-08-02 | Mitsubishi Denki Kabushiki Kaisha | Air conditioning apparatus |
| EP1942306A1 (en) * | 2005-10-25 | 2008-07-09 | Mitsubishi Electric Corporation | Air-conditioning apparatus, method of refrigerant filling in air-conditioning apparatus, method of judging state of refrigerant filling in air-conditioning apparatus, and method of refrigerant filling/piping cleaning for air-conditioning apparatus |
| EP1942306A4 (en) * | 2005-10-25 | 2010-09-29 | Mitsubishi Electric Corp | Air-conditioning apparatus, method of refrigerant filling in air-conditioning apparatus, method of judging state of refrigerant filling in air-conditioning apparatus, and method of refrigerant filling/piping cleaning for air-conditioning apparatus |
| US8087258B2 (en) | 2005-10-25 | 2012-01-03 | Mitsubishi Electric Corporation | Air conditioner, refrigerant filling method of air conditioner, method for judging refrigerant filling state of air conditioner as well as refrigerant filling and pipe cleaning method of air conditioner |
| US9103574B2 (en) | 2005-10-25 | 2015-08-11 | Mitsubishi Electric Corporation | Air conditioner, refrigerant filling method of air conditioner, method for judging refrigerant filling state of air conditioner as well as refrigerant filling and pipe cleaning method of air conditioner |
| KR100882005B1 (en) * | 2007-06-26 | 2009-02-04 | 고려대학교 산학협력단 | Device for detecting the status of coolant charged in the heat exchange system and method for controllling the same |
| WO2020094007A1 (en) * | 2018-11-07 | 2020-05-14 | 宁波奥克斯电气股份有限公司 | Control method and device for improving refrigeration comfort of inverter air-conditioner, and air conditioner |
| WO2023132010A1 (en) * | 2022-01-05 | 2023-07-13 | 三菱電機株式会社 | Air-conditioning device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20030107 |