JPH11316149A - Level detecting device of absorption refrigerating device - Google Patents
Level detecting device of absorption refrigerating deviceInfo
- Publication number
- JPH11316149A JPH11316149A JP10123062A JP12306298A JPH11316149A JP H11316149 A JPH11316149 A JP H11316149A JP 10123062 A JP10123062 A JP 10123062A JP 12306298 A JP12306298 A JP 12306298A JP H11316149 A JPH11316149 A JP H11316149A
- Authority
- JP
- Japan
- Prior art keywords
- light
- liquid level
- light receiving
- liquid
- detecting device
- 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
Classifications
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Sorption Type Refrigeration Machines (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本願発明は、吸収式冷凍装置
の液面検出装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid level detecting device for an absorption refrigeration system.
【０００２】[0002]
【従来の技術】従来から例えば冷媒として水、吸収液と
して臭化リチウム（ＬｉＢｒ）を採用した吸収式冷凍装
置が種々開発されてきている。この系の装置は、安全
で、しかも水の蒸発潜熱が他の系に比較して最も大きい
ために、高い効率を得ることができる。2. Description of the Related Art Various absorption refrigeration systems employing, for example, water as a refrigerant and lithium bromide (LiBr) as an absorption liquid have been developed. The system of this system is safe and has high efficiency because the latent heat of vaporization of water is the highest compared to other systems.
【０００３】そして、このような吸収式冷凍装置では、
冷凍回路中に例えばガスバーナなどなどの加熱源を有す
る高温再生器を備え、該高温再生器により、吸収作用完
了後の臭化リチウム希溶液を加熱沸騰させて、冷媒蒸気
である水蒸気と吸収液である臭化リチウム濃溶液とに分
離再生するようになっている。[0003] In such an absorption refrigeration system,
A high-temperature regenerator having a heating source such as a gas burner is provided in the refrigeration circuit. It is designed to separate and regenerate into a certain lithium bromide concentrated solution.
【０００４】この高温再生器に供給される臭化リチウム
希溶液は、吸収器において吸収液である臭化リチウム濃
溶液に冷媒蒸気である水蒸気を吸収させることによって
得られ、例えば溶液熱交換器を経て有効に予熱された後
に当該高温再生器へ還流されるようになっている。[0004] The lithium bromide dilute solution supplied to the high-temperature regenerator is obtained by causing a concentrated solution of lithium bromide as an absorbing solution to absorb water vapor as a refrigerant vapor in an absorber. After having been effectively preheated through this, it is returned to the high-temperature regenerator.
【０００５】ところで、このような吸収式冷凍装置の高
温再生器では、その負荷量に応じて系を適切に運転制御
するために、その希溶液レベルを所望の目標レベルに最
適に制御することが必要である。そのために通常上記臭
化リチウム希溶液の液面位を検出する液面検出手段が設
けられている。Incidentally, in such a high-temperature regenerator of an absorption refrigerating apparatus, in order to appropriately control the operation of the system in accordance with the load, it is necessary to optimally control the dilute solution level to a desired target level. is necessary. Therefore, a liquid level detecting means for detecting the liquid level of the dilute lithium bromide solution is usually provided.
【０００６】従来この種の液面位検出手段としては、例
えば図１０に示すように高温再生器１の容器本体４の上
方部に複数本の電極棒５ａ，５ｂ，５ｃを高さを変えて
設置したものや、また図１１および図１２に示すように
高温再生器１の容器本体４内にフロート軸８を嵌挿し、
このフロート軸８に対してリードスイッチＲＳを設ける
一方、それに対応して同リードスイッチＲＳを作動させ
るマグネットＭＧを設けた上下２つのフロート６ａ，６
ｂを当該フロート軸８に昇降自在に遊嵌し、それらの上
下昇降位置をストッパ７ａ，７ｂ，７ｃで規制するフロ
ートスイッチ６を設けたものなどが採用されていた。Conventionally, as this kind of liquid level detecting means, for example, as shown in FIG. 10, a plurality of electrode rods 5a, 5b, 5c are changed in height above the container body 4 of the high temperature regenerator 1 to change the height. 11 and 12, the float shaft 8 is inserted into the container body 4 of the high-temperature regenerator 1,
A reed switch RS is provided for the float shaft 8, and two upper and lower floats 6a and 6 are provided with magnets MG for operating the reed switch RS correspondingly.
b is freely fitted to the float shaft 8 so as to be able to move up and down, and a float switch 6 for regulating the vertical position of the float with stoppers 7a, 7b and 7c is used.
【０００７】[0007]
【発明が解決しようとする課題】しかし、上記高温再生
器のような気密度（真空）を要求される容器本体内に複
数本の電極棒を嵌挿設置する構成の場合、それら各電極
棒嵌挿部の気密性（シール性）の維持に困難を伴うし、
また同容器本体内にフロートスイッチを設ける場合、そ
の高温、腐食環境下での耐久性が問題となる。また、そ
れぞれメンテナンスに困難を伴う。However, in the case of a configuration in which a plurality of electrode rods are inserted and installed in a container body requiring air tightness (vacuum), such as the high temperature regenerator, each of the electrode rods is inserted. It is difficult to maintain the airtightness (sealability) of the insertion part,
Further, when a float switch is provided in the main body of the container, there is a problem of durability in a high temperature and corrosive environment. In addition, maintenance is difficult in each case.
【０００８】本願発明は、このような問題を解決するた
めになされたもので、液収容部の相互に対向する上部面
又は下部面の何れか一方に透光部を、他方に反射部を形
成する一方、上記透光部外方に上記透光部から液部を介
して上記反射部の基準となる反射点方向に向けて光を照
射する発光部と上記反射部の反射点からの反射光を受光
する受光部とを設け、該受光部における液部の高さに応
じた受光位置の変化から上記液収容部内の液面位を検出
するようにすることにより、上記従来の問題を解決した
吸収式冷凍装置の液面検出装置を提供することを目的と
するものである。The present invention has been made to solve such a problem, and a light transmitting portion is formed on one of an upper surface and a lower surface of a liquid storage portion facing each other, and a reflection portion is formed on the other. On the other hand, a light-emitting unit that irradiates light from the light-transmitting part toward the direction of a reflection point that is a reference of the reflection unit from the light-transmitting unit through the liquid unit, and light reflected from the reflection point of the reflection unit A light receiving unit for receiving the light, and detecting the liquid level in the liquid storage unit from a change in the light receiving position according to the height of the liquid unit in the light receiving unit. It is an object of the present invention to provide a liquid level detection device for an absorption refrigeration device.
【０００９】[0009]
【課題を解決するための手段】本願発明は、上記の目的
を達成するために、次のような課題解決手段を備えて構
成されている。Means for Solving the Problems In order to achieve the above object, the present invention is provided with the following means for solving the problems.
【００１０】（１） 請求項１記載の発明 請求項１記載の発明は、液収容部の相互に対向する上部
面又は下部面の何れか一方に透光部を、他方に反射部を
形成する一方、上記透光部外方に上記透光部から液部を
介して上記反射部の基準となる反射点方向に向けて光を
照射する発光部と上記反射部の反射点からの反射光を受
光する受光部とを設け、該受光部における上記液部の高
さに応じた受光位置の変化から上記液収容部内の液面位
を検出するようになっている。(1) The invention according to claim 1 In the invention according to claim 1, a light-transmitting portion is formed on one of an upper surface and a lower surface of the liquid container facing each other, and a reflecting portion is formed on the other. On the other hand, the light emitted from the light transmitting section and the light reflected from the reflecting point of the reflecting section are radiated from the light transmitting section through the liquid section toward the reflection point direction which is the reference of the reflecting section outside the light transmitting section. A light receiving portion for receiving light; a liquid level in the liquid storage portion is detected from a change in a light receiving position of the light receiving portion in accordance with a height of the liquid portion.
【００１１】以上の構成では、上記発光部から垂直以外
の方向に照射された光は、透光部及び液相部と気相部を
透過した後、反射部で反射して受光部に到達する。この
とき、気相部と液相部における屈折率の差異から液面の
高さによって反射光の光路が異なる。よって、予じめ受
光部の基準点と液面高さの関係を把握しておけば、基準
点からの偏位量を測定することにより、容易に液面高さ
を検出することができる。In the above arrangement, the light emitted from the light emitting portion in a direction other than the vertical direction passes through the light transmitting portion, the liquid phase portion, and the gas phase portion, and is reflected by the reflecting portion to reach the light receiving portion. . At this time, the optical path of the reflected light differs depending on the height of the liquid surface due to the difference in the refractive index between the gas phase portion and the liquid phase portion. Therefore, if the relationship between the reference point of the light receiving unit and the liquid level is grasped in advance, the liquid level can be easily detected by measuring the amount of deviation from the reference point.
【００１２】しかも、以上の構成では光を往復させるこ
とで、往復させない場合に比較して光路長さを倍にとる
ことができるので、基準点からの偏位量を大きくするこ
とが可能となり、液面位の検出精度が向上する。In addition, in the above configuration, by reciprocating the light, the optical path length can be doubled as compared with the case where the reciprocation is not performed, so that the amount of deviation from the reference point can be increased. The detection accuracy of the liquid level is improved.
【００１３】さらに、以上の構成では一方の面で光の照
射及び受光を行うようにしたので、液面検出部（例えば
発光部、受光部さらには液面位判別回路等）の一体化構
成が可能となり、設置が容易になる。また、液面検出装
置本体の上下いずれの位置にも同液面検出部を設置する
ことができるので、装置のレイアウトが容易になる。Further, in the above configuration, light irradiation and light reception are performed on one surface, so that an integrated configuration of a liquid level detection unit (for example, a light emitting unit, a light receiving unit, and a liquid level determination circuit) is provided. It becomes possible and installation becomes easy. In addition, since the liquid level detecting unit can be installed at any position above and below the liquid level detecting device main body, the layout of the device is simplified.
【００１４】また、メンテナンスも容易になる。Further, maintenance becomes easy.
【００１５】（２） 請求項２記載の発明 請求項２記載の発明は、上記請求項１記載の発明におい
て、その受光部における受光位置の変化に基いて液面位
を判別する液面位判別回路が設けられている。(2) A liquid level discrimination method according to the first aspect of the present invention, wherein the liquid level is determined based on a change in a light receiving position in the light receiving section. A circuit is provided.
【００１６】したがって、該液面位判別回路により、上
記受光部の受光位置の変化に基いて正確に液部の液面位
が検出判定される。Therefore, the liquid level determination circuit accurately detects and determines the liquid level of the liquid portion based on the change in the light receiving position of the light receiving portion.
【００１７】（３） 請求項３記載の発明 請求項３記載の発明は、上記請求項１又は２記載の発明
において、その発光部と透光部との間にチョッパーミラ
ーを設け、上記発光部からの光を上記受光部に基準点位
置として周期的に全反射させるようになっている。(3) The invention as set forth in claim 3 according to the invention as set forth in claim 1 or 2, wherein a chopper mirror is provided between the light emitting section and the light transmitting section. Light is periodically reflected by the light receiving section as a reference point position.
【００１８】このような構成にすると、発光部から照射
された光は、チョッパーミラーにより、周期的に全反射
して、受光部の基準点に到達する。この基準点は、液面
高さに関係しない絶対的なものなので、受光部における
反射光の受光位置と基準点間の距離を測定すれば、液面
高さをより正確に検出することが可能となる。With this configuration, the light emitted from the light emitting section is totally totally reflected by the chopper mirror and reaches the reference point of the light receiving section. Since this reference point is absolutely independent of the liquid level, measuring the distance between the light receiving position of the reflected light at the light receiving section and the reference point enables the liquid level to be detected more accurately. Becomes
【００１９】（４） 請求項４記載の発明 請求項４記載の発明は、上記請求項２又は３記載の発明
において、その液面位判別回路が、所定の周期で受光部
における受光位置の変化を入力し、同周期で液面位を時
間平均的に演算するようになっている。(4) The invention as set forth in claim 4 according to the invention as set forth in claim 2 or 3, wherein the liquid level determining circuit is adapted to change the light receiving position in the light receiving section at a predetermined cycle. Is input, and the liquid level is calculated on a time-average basis in the same cycle.
【００２０】したがって、このような構成にすると、液
面部の揺れによる誤検出を避けることができるようにな
る。Therefore, with this configuration, it is possible to avoid erroneous detection due to the fluctuation of the liquid surface.
【００２１】（５） 請求項５記載の発明 請求項５記載の発明は、上記請求項１，２，３又は４記
載の発明において、液面検出装置が液収容部に対し、ジ
ョイント部を有する連絡配管により、着脱可能に付設さ
れるようになっている。(5) The invention according to claim 5 The invention according to claim 5 is the invention according to claim 1, 2, 3 or 4 wherein the liquid level detecting device has a joint portion with respect to the liquid storage portion. The connecting pipe is detachably attached.
【００２２】したがって、取付けやメンテナンス作業が
容易になる。Therefore, mounting and maintenance work become easy.
【００２３】（６） 請求項６記載の発明 請求項６記載の発明は、上記請求項１，２，３，４又は
５記載の発明において、その液収容部が、高温再生器で
あることを特徴としており、気密性を要求される高温再
生器内の臭化リチウム希溶液の液面位が、上記各作用に
よって正確に検出される。(6) The invention according to claim 6 The invention according to claim 6 is the invention according to claim 1, 2, 3, 4 or 5, wherein the liquid container is a high-temperature regenerator. As a feature, the liquid level of the lithium bromide dilute solution in the high-temperature regenerator, which requires hermeticity, is accurately detected by the above-described operations.
【００２４】したがって、このような液面検出装置の構
成によると、例えば高温再生器の加熱沸騰状態にある高
温の臭化リチウム希溶液の液面位を非接触で容易に検出
することができ、気密性保持の問題やフロートスイッチ
の場合のような腐食や耐久性、信頼性等の問題が確実に
解消される。Therefore, according to the configuration of such a liquid level detecting device, the liquid level of a high-temperature dilute solution of lithium bromide in a heated and boiling state of a high-temperature regenerator can be easily detected in a non-contact manner. The problem of maintaining airtightness and the problems of corrosion, durability, reliability and the like as in the case of a float switch are surely solved.
【００２５】[0025]
【発明の効果】以上の結果、本願発明の吸収式冷凍装置
の液面検出装置によると、次のような効果が得られる。As a result, according to the liquid level detecting device of the absorption refrigeration system of the present invention, the following effects can be obtained.
【００２６】（１） 非接触方式による液面検出が可能
となるので、液収容部の気密性の保持が容易である。(1) Since the liquid level can be detected by the non-contact method, the airtightness of the liquid container can be easily maintained.
【００２７】（２） 受光部の受光点密度を高くするこ
とにより、略アナログ的な液面位の検出が可能になる。(2) By increasing the light receiving point density of the light receiving section, it is possible to detect the liquid level substantially in an analog manner.
【００２８】（３） 非接触方式なので、高温・腐食性
のある液部の液面位をも、何ら問題なく検出することが
できる。(3) Since it is a non-contact type, the liquid level of a liquid part having high temperature and corrosiveness can be detected without any problem.
【００２９】（４） 反射による復光路構成を採用して
いるので、単光路構成の場合に比べて光路長さを長く取
れ、受光位置の変化幅が大きいので検出精度が向上す
る。(4) Since the return optical path configuration by reflection is adopted, the optical path length can be made longer than in the case of the single optical path configuration, and the change width of the light receiving position is large, so that the detection accuracy is improved.
【００３０】（５） 液部本来の温度を変化させること
なく、液面位を検出することができる。(5) The liquid level can be detected without changing the original temperature of the liquid part.
【００３１】（６） 取付けおよびメンテナンス作業が
容易になる。(6) Installation and maintenance work is facilitated.
【００３２】（７） 気密性が高く、高温、腐食環境下
である高温再生器内の臭化リチウム希溶液の液面位検出
に適したものとなる。(7) It is suitable for detecting the liquid level of a dilute lithium bromide solution in a high-temperature regenerator having high airtightness and high temperature and corrosive environment.
【００３３】[0033]
【発明の実施の形態】（実施の形態１）先ず図１〜図３
は、この出願の発明を吸収式冷凍装置の高温再生器に適
用した実施の形態１に係る液面検出装置の構成および作
用を示している。(Embodiment 1) First, FIGS.
1 shows the configuration and operation of a liquid level detecting apparatus according to Embodiment 1 in which the invention of this application is applied to a high-temperature regenerator of an absorption refrigeration apparatus.
【００３４】図１および図２中、符号１は高温再生器で
あり、その容器本体１ｂの底部には加熱源としてのガス
バーナ２を備えている。そして、上記容器本体１ｂ内側
の高温再生室１ａ内には、前述のように吸収器からの臭
化リチウム希溶液が供給されるようになっており、該供
給された臭化リチウム希溶液を上記ガスバーナ２により
加熱沸騰させることによって水冷媒蒸気を発生させ、そ
の水冷媒蒸気を冷媒蒸気配管３を介して凝縮器に供給す
るようになっている。In FIGS. 1 and 2, reference numeral 1 denotes a high-temperature regenerator, and a gas burner 2 as a heating source is provided at the bottom of the container body 1b. As described above, the lithium bromide dilute solution from the absorber is supplied into the high-temperature regeneration chamber 1a inside the container main body 1b. The water refrigerant vapor is generated by heating and boiling by the gas burner 2, and the water refrigerant vapor is supplied to the condenser through the refrigerant vapor pipe 3.
【００３５】符号１１は、上記高温再生器１の容器本体
１ｂの液面位側部に上下連通パイプ１２ａ，１２ｂを介
して設けられた液面検出装置であり、該液面検出装置１
１の装置本体容器１１ｂの底部には透光ガラス部１３ａ
が、また天井部下面には反射鏡部１３ｂがそれぞれ設け
られている。また上記透光ガラス部１３ａの下方には、
発光部１４および受光部１５が並設されている。Reference numeral 11 denotes a liquid level detecting device provided on the liquid level side of the container body 1b of the high temperature regenerator 1 via upper and lower communicating pipes 12a and 12b.
The transparent glass portion 13a is provided at the bottom of the device main body container 11b.
However, a reflecting mirror 13b is provided on the lower surface of the ceiling. In addition, below the translucent glass part 13a,
The light emitting unit 14 and the light receiving unit 15 are provided side by side.
【００３６】そして、上記受光部１５には、さらに液面
位判別回路１６が接続されている。The light receiving section 15 is further connected to a liquid level determining circuit 16.
【００３７】上記発光部１４および受光部１５は、例え
ば図３に詳細に示すように、上記液面検出装置１１の装
置本体１１ｂ内に臭化リチウム希溶液が全く入っていな
い空の状態（液相部Ｂの屈折率がゼロで気相部Ａだけ）
の時に、上記発光部１４の光源Ｘ点からの光が上記反射
鏡部１３ｂの反射面の基準反射点（例えば中心点）Ｒ0
で反射し、上記受光部１５の右端側基準受光点Ｐ0に入
射するように光源Ｘの発光角φおよび受光部１５の受光
点Ｐが設定されている。As shown in detail in FIG. 3, for example, the light emitting section 14 and the light receiving section 15 are in an empty state (liquid state) where no dilute lithium bromide solution is contained in the apparatus main body 11b of the liquid level detecting apparatus 11. (The refractive index of phase part B is zero and only gas phase part A)
At this time, the light from the light source X point of the light emitting section 14 is reflected by a reference reflection point (for example, a center point) R 0 on the reflection surface of the reflection mirror section 13b.
The light-emitting angle φ of the light source X and the light-receiving point P of the light-receiving unit 15 are set so that the light is reflected by the light-receiving unit 15 and enters the reference light-receiving point P 0 on the right end of the light-receiving unit 15.
【００３８】そして、上記装置本体１１ｂ内に所定量の
臭化リチウム希溶液（液相部Ｂ）がある時は、その液面
位Ｌｎに応じて異なってくる上記発光部１４からの光の
屈折率の差により、上記反射鏡部１３ｂの反射点ＲがＲ
0，Ｒ1，Ｒ2，Ｒ3・・・Ｒｎと変化し、さらに受光部１
５の受光点Ｐが上記基準点Ｐ0から左端側方向にＰ0，Ｐ
1，Ｐ2，Ｐ3・・・・Ｐｎと偏位するので、それら受光
部１５の各受光点に対応して例えば複数の光電スイッチ
を設け、同偏位量ΔＬを、それら複数の光電スイッチの
内の何れがＯＮになったかによって検出し、上記液面位
判別回路１６によって判別することによって最終的に正
確な液面位が検出される。When a predetermined amount of a dilute lithium bromide solution (liquid phase portion B) is present in the apparatus main body 11b, refraction of light from the light emitting section 14 which varies depending on the liquid level Ln. The reflection point R of the reflecting mirror 13b is set to R
0 , R 1 , R 2 , R 3 ... Rn, and
P 0 in the left side direction receiving point P from the reference point P 0 of 5, P
1, since P 2, to P 3 · · · · Pn and excursion, they provide a plurality of photoelectric switch, for example, corresponding to the light receiving point of the light receiving portion 15, the same deviation amount [Delta] L, the plurality of photoelectric switch The liquid level is detected by detecting which of them has been turned ON, and the liquid level is determined by the liquid level determination circuit 16, whereby an accurate liquid level is finally detected.
【００３９】以上の構成では、上記発光部１４から垂直
以外の方向に照射された光は、透光ガラス部１３ａ及び
臭化リチウム希溶液（液相部Ｂ）と水蒸気（気相部Ａ）
を透過した後、反射鏡部１３ｂで鏡面反射して受光部１
５に到達する。このとき、気相部Ａと液相部Ｂにおける
屈折率の差異から液面の高さによって上記反射光の光路
が異なってくる。従って、予じめ上記受光部１５の上記
受光基準点Ｐ0と液面高さの関係を把握しておけば、上
記受光基準点Ｐ0からの偏位量ΔＬを測定することによ
り、容易に液面高さを検出することができる。In the above configuration, the light emitted from the light emitting section 14 in a direction other than the vertical direction includes the light transmitting glass section 13a and the dilute lithium bromide solution (liquid phase section B) and water vapor (gas phase section A).
After the light is transmitted through the light receiving portion 1
Reach 5 At this time, the optical path of the reflected light differs depending on the height of the liquid surface due to the difference in the refractive index between the gas phase part A and the liquid phase part B. Therefore, if the relationship between the light receiving reference point P 0 of the light receiving unit 15 and the liquid level is grasped in advance, the deviation ΔL from the light receiving reference point P 0 can be easily measured. The liquid level can be detected.
【００４０】しかも、以上の構成では反射鏡部１３ｂを
介して光を往復させることにより、往復させない場合に
比較して光路長さを倍にとることができるので、上記受
光基準点Ｐ0からの偏位量ΔＬを大きくすることが可能
となり、液面位の検出精度が向上する。[0040] Moreover, by reciprocating the light through the reflection mirror portion 13b in the above configuration, since as compared with the case of not reciprocate may take the optical path length doubles, from the light receiving reference point P 0 The displacement amount ΔL can be increased, and the detection accuracy of the liquid level is improved.
【００４１】さらに、以上の構成では装置本体１１ｂの
一方側の面で光の照射及び受光を行えるようにしたの
で、液面検出部（発光部１４、受光部１５及び液面位判
別回路１６）の一体化構成が可能となり、設置が容易に
なる。また、液面検出装置１１の上下いずれの位置にも
同液面検出部を設置することができるので、装置のレイ
アウトが容易となる。Further, in the above configuration, light irradiation and light reception can be performed on one surface of the apparatus main body 11b. Therefore, the liquid level detecting section (light emitting section 14, light receiving section 15, and liquid level determining circuit 16) And the installation becomes easy. Further, since the liquid level detecting unit can be installed at any position above and below the liquid level detecting device 11, the layout of the device is simplified.
【００４２】したがって、このような液面検出装置の構
成によると、高温再生器１の加熱沸騰状態にある高温の
臭化リチウム希溶液の液位を非接触で容易に検出するこ
とができ、気密性保持の問題やフロートスイッチの場合
のような腐食や耐久性、信頼性等の問題が確実に解消さ
れる。Therefore, according to the configuration of such a liquid level detecting device, the liquid level of the high temperature regenerator 1 in the heated and boiling state of the dilute solution of high temperature lithium bromide can be easily detected in a non-contact manner, and the airtightness can be obtained. The problem of maintaining the performance and the problems of corrosion, durability, reliability and the like as in the case of the float switch are surely solved.
【００４３】また、メンテナンス作業も容易になる。Further, maintenance work becomes easy.
【００４４】（変形例）なお、上記図１〜図３の構成で
は、装置本体１１ｂの底部に透光ガラス部１３ａを、天
井部に反射鏡部１３ｂを設け、透光ガラス部１３ａの下
方側に発光部１４、受光部１５、液面位判別回路１６よ
りなる液位判別部を設けるようにしたが、これは例えば
図４に示すように、装置本体１１ｂの天井部に透光ガラ
ス部１３ａを、底部に反射鏡部１３ｂを設け、透光ガラ
ス部１３ａの上方側に発光部１４、受光部１５、液面位
判別回路１６よりなる液面検出部を設けるようにしても
全く同様の作用効果を得ることができる。(Modification) In the configuration shown in FIGS. 1 to 3, a light-transmitting glass portion 13a is provided at the bottom of the apparatus main body 11b, a reflecting mirror portion 13b is provided at the ceiling portion, and the lower side of the light-transmitting glass portion 13a. Is provided with a liquid level discriminating section comprising a light emitting section 14, a light receiving section 15, and a liquid level discriminating circuit 16, but this is, for example, as shown in FIG. The same operation can be achieved by providing a reflecting mirror section 13b at the bottom and a liquid level detecting section including a light emitting section 14, a light receiving section 15, and a liquid level determining circuit 16 above the translucent glass section 13a. The effect can be obtained.
【００４５】（実施の形態２）次に図５および図６は、
本願発明の実施の形態２に係る吸収式冷凍装置の液面検
出装置の構成を示している。(Embodiment 2) Next, FIG. 5 and FIG.
9 shows a configuration of a liquid level detection device of an absorption refrigeration apparatus according to Embodiment 2 of the present invention.
【００４６】この実施の形態では、上記実施の形態１の
液面検出装置の構成において、発光部１４と透光ガラス
部１３ａとの間にモータ１６ａによって所定の回転速度
で水平回転されるチョッパーミラー１６を設け、上記発
光部１４からの光を該チョッパーミラー１６のミラー部
１６ｂによって所定の周期で下方側受光部１５の左端側
所定位置に全反射させ、該位置を受光基準点Ｐ0として
設定するようになっている。そして、該設定された受光
基準点Ｐ0からの光の受光点Ｐｎの偏位量（距離）ΔＬ
を検出することによって液面位Ｌｎを検出するようにし
ている。In this embodiment, in the configuration of the liquid level detecting device of the first embodiment, the chopper mirror horizontally rotated at a predetermined rotation speed by the motor 16a between the light emitting unit 14 and the light transmitting glass unit 13a. 16 is provided, the light from the light emitting portion 14 is totally reflected on the left side position of the lower-side light receiving unit 15 in a predetermined cycle by the mirror portion 16b of the chopper mirror 16, sets the position as the light receiving reference point P 0 It is supposed to. Then, the deviation amount (distance) ΔL of the light receiving point Pn of the light from the set light receiving reference point P 0.
Is detected to detect the liquid level Ln.
【００４７】このような構成にすると、発光部１４の光
源Ｘから照射された光は、チョッパーミラー１６のミラ
ー部１６ｂにより、周期的に全反射して、受光部１５の
受光基準点Ｐ0に到達する。この基準点Ｐ0は、液面高さ
に関係しない絶対的なものなので、反射光の受光位置Ｐ
ｎと同受光基準点Ｐ0間の距離ΔＬを測定すれば、液面
高さをより正確に検出することが可能となる。With such a configuration, the light emitted from the light source X of the light emitting section 14 is totally reflected periodically by the mirror section 16 b of the chopper mirror 16 and reaches the light receiving reference point P 0 of the light receiving section 15. To reach. Since the reference point P 0 is an absolute point irrespective of the liquid level, the light receiving position P of the reflected light
If the distance ΔL between n and the light receiving reference point P 0 is measured, the liquid level can be detected more accurately.
【００４８】（実施の形態３）次に図７および図８は、
本願発明の実施の形態３に係る吸収式冷凍装置の液面検
出装置の構成を示している。(Embodiment 3) Next, FIG. 7 and FIG.
9 shows a configuration of a liquid level detection device of an absorption refrigeration apparatus according to Embodiment 3 of the present invention.
【００４９】この実施の形態では、上記実施の形態１の
液面検出装置の構成において、透光ガラス部１３ａと発
光部１４との間にモータ１６ａによって所定の回転速度
で水平回転されるチョッパーミラー１６を設け、上記反
射鏡部１３ｂからの反射光を該チョッパーミラー１６の
スリット１６ｃによって所定の周期で下方側受光部１５
に入射受光させ、該受光点Ｐｎの受光基準点Ｐ0からの
偏位量ΔＬを検出することによって、図８のように所定
の演算周期で液面位Ｌｎを検出するようにしているよう
になる。In this embodiment, in the configuration of the liquid level detecting device of the first embodiment, the chopper mirror horizontally rotated at a predetermined rotation speed by the motor 16a between the light transmitting glass portion 13a and the light emitting portion 14. 16 is provided, and the reflected light from the reflecting mirror section 13b is reflected by the slit 16c of the chopper mirror 16 at a predetermined cycle.
As shown in FIG. 8, the liquid level Ln is detected at a predetermined calculation cycle by detecting the amount of deviation ΔL of the light receiving point Pn from the light receiving reference point P 0 . Become.
【００５０】このような構成にすると、時間平均的な液
面位を検出できるようになることから短時間内の液面の
揺れの影響を受けることなく、正確な液面位を検出する
ことができる。With this configuration, it is possible to detect a time-average liquid level, so that an accurate liquid level can be detected without being affected by the fluctuation of the liquid level within a short time. it can.
【００５１】（実施の形態４）さらに図９は、本願発明
の実施の形態４に係る吸収式冷凍装置の液面検出装置の
構成を示している。(Embodiment 4) FIG. 9 shows a configuration of a liquid level detecting device of an absorption refrigeration apparatus according to Embodiment 4 of the present invention.
【００５２】この実施の形態では、以上のような液面検
出装置１１の装置本体１１ｂを高温再生器１の容器本体
１ｂに対して連絡パイプ１２ａ，１２ｂを介して外付け
するに際し、バルブ１８ａ，１８ｂ，１８ｃや真空引き
ポート１９を有する連絡パイプ１２ａ，１２ｂの基端側
を高温再生器１の容器本体１ｂに連結固定する一方、そ
の非固定側端部に、回動操作によって着脱自在なジョイ
ント１７ａ，１７ｂを設け、これらジョイント１７ａ，
１７ｂを介して液面検出装置１１の装置本体１１ｂを着
脱可能に取り付けるようにしたことを特徴とするもので
ある。In this embodiment, when the apparatus main body 11b of the liquid level detecting device 11 as described above is externally connected to the container main body 1b of the high temperature regenerator 1 via the communication pipes 12a, 12b, the valves 18a, The base ends of the communication pipes 12a, 12b having the vacuum ports 18b, 18c and the vacuum evacuation port 19 are connected and fixed to the container body 1b of the high temperature regenerator 1. 17a and 17b are provided, and these joints 17a and 17b are provided.
The apparatus main body 11b of the liquid level detecting device 11 is detachably attached via the base 17b.
【００５３】このような構成にすると、液面検出装置１
１の定期又は故障時等の点検およびメンテナンス作業が
容易になる。With such a configuration, the liquid level detecting device 1
(1) Inspection and maintenance work at regular intervals or at the time of failure becomes easy.
【図１】本願発明の実施の形態１に係る吸収式冷凍装置
の液面検出装置の構成を示す断面図である。FIG. 1 is a cross-sectional view illustrating a configuration of a liquid level detection device of an absorption refrigeration apparatus according to Embodiment 1 of the present invention.
【図２】同装置の要部の拡大斜視図である。FIG. 2 is an enlarged perspective view of a main part of the device.
【図３】同装置の液面検出原理を示す説明図である。FIG. 3 is an explanatory view showing a liquid level detection principle of the apparatus.
【図４】本願発明の実施の形態１の変形例に係る吸収式
冷凍装置の液面検出装置の構成を示す拡大斜視図であ
る。FIG. 4 is an enlarged perspective view illustrating a configuration of a liquid level detection device of an absorption refrigeration apparatus according to a modified example of Embodiment 1 of the present invention.
【図５】本願発明の実施の形態２に係る吸収式冷凍装置
の液面検出装置の構成を示す拡大断面図である。FIG. 5 is an enlarged cross-sectional view illustrating a configuration of a liquid level detection device of an absorption refrigeration apparatus according to Embodiment 2 of the present invention.
【図６】同装置の要部の拡大斜視図である。FIG. 6 is an enlarged perspective view of a main part of the device.
【図７】本願発明の実施の形態３に係る吸収式冷凍装置
の液面検出装置の構成を示す斜視図である。FIG. 7 is a perspective view showing a configuration of a liquid level detection device of an absorption refrigeration apparatus according to Embodiment 3 of the present invention.
【図８】同装置の作用を示すタイムチャートである。FIG. 8 is a time chart showing the operation of the same device.
【図９】本願発明の実施の形態４に係る吸収式冷凍装置
の液面検出装置の構成を示す拡大斜視図である。FIG. 9 is an enlarged perspective view illustrating a configuration of a liquid level detection device of an absorption refrigeration apparatus according to Embodiment 4 of the present invention.
【図１０】第１の従来例に係る吸収式冷凍装置の液面検
出装置の構成を示す断面図である。FIG. 10 is a cross-sectional view illustrating a configuration of a liquid level detection device of an absorption refrigeration apparatus according to a first conventional example.
【図１１】第２の従来例に係る吸収式冷凍装置の液面検
出装置の構成を示す断面図である。FIG. 11 is a cross-sectional view illustrating a configuration of a liquid level detection device of an absorption refrigeration apparatus according to a second conventional example.
【図１２】同装置の要部の一部切欠斜視図である。FIG. 12 is a partially cutaway perspective view of a main part of the device.
１は高温再生器、１ａは高温再生室、１ｂは容器本体、
２はガスバーナ、３は冷媒蒸気配管、１１は液面検出装
置、１１ａは溶液収容空間、１１ｂは装置本体容器、１
３ａは透光ガラス部、１３ｂは反射鏡部、１４は発光
部、１５は受光部、１６はチョッパーミラー、１７ａ，
１７ｂはジョイントである。1 is a high temperature regenerator, 1a is a high temperature regeneration chamber, 1b is a container body,
2 is a gas burner, 3 is a refrigerant vapor pipe, 11 is a liquid level detecting device, 11a is a solution accommodating space, 11b is a device main body container, 1
3a is a translucent glass part, 13b is a reflecting mirror part, 14 is a light emitting part, 15 is a light receiving part, 16 is a chopper mirror, 17a,
17b is a joint.
Claims (6)
部面の何れか一方に透光部を、他方に反射部を形成する
一方、上記透光部外方に上記透光部から液部を介して上
記反射部の基準となる反射点方向に向けて光を照射する
発光部と上記反射部の反射点からの反射光を受光する受
光部とを設け、該受光部における上記液部の高さに応じ
た受光位置の変化から上記液収容部内の液面位を検出す
るようにした吸収式冷凍装置の液面検出装置1. A light transmitting portion is formed on one of an upper surface and a lower surface of a liquid storage portion facing each other, and a reflection portion is formed on the other. A light-emitting unit that irradiates light toward a reflection point direction that is a reference of the reflection unit via a unit; and a light-receiving unit that receives light reflected from the reflection point of the reflection unit, and the liquid unit in the light-receiving unit. Detecting device for detecting the liquid level in the liquid storage section from a change in the light receiving position according to the height of the liquid.
液面位を判別する液面位判別回路を設けたことを特徴と
する請求項１記載の吸収式冷凍装置の液面検出装置。2. The liquid level detecting device according to claim 1, further comprising a liquid level determining circuit for determining a liquid level based on a change in a light receiving position in the light receiving section.
ーを設け、上記発光部からの光を上記受光部に基準点位
置として周期的に全反射させるようにしたことを特徴と
する請求項１又は２記載の吸収式冷凍装置の液面検出装
置。3. A light-emitting device according to claim 1, wherein a chopper mirror is provided between the light-emitting portion and the light-transmitting portion, and the light from the light-emitting portion is totally reflected periodically to the light-receiving portion as a reference point position. Item 3. A liquid level detecting device for an absorption refrigeration apparatus according to item 1 or 2.
における受光位置の変化を入力し、同周期で液面位を時
間平均的に演算するようにしたことを特徴とする請求項
２又は３記載の吸収式冷凍装置の液面検出装置。4. The liquid level determination circuit according to claim 1, wherein a change in the light receiving position in the light receiving section is input at a predetermined cycle, and the liquid level is time-averaged at the same cycle. 4. The liquid level detecting device of the absorption refrigeration device according to 2 or 3.
ント部を有する連絡配管により、着脱可能に付設される
ようになっていることを特徴とする請求項１，２，３又
は４記載の吸収式冷凍装置の液面検出装置。5. A liquid level detecting device according to claim 1, wherein said liquid level detecting device is detachably attached to said liquid containing portion by a connecting pipe having a joint portion. Liquid level detector of absorption refrigeration system.
徴とする請求項１，２，３，４又は５記載の吸収式冷凍
装置の液面検出装置。6. The liquid level detecting device for an absorption type refrigeration system according to claim 1, wherein the liquid storage section is a high-temperature regenerator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10123062A JPH11316149A (en) | 1998-05-06 | 1998-05-06 | Level detecting device of absorption refrigerating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10123062A JPH11316149A (en) | 1998-05-06 | 1998-05-06 | Level detecting device of absorption refrigerating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11316149A true JPH11316149A (en) | 1999-11-16 |
Family
ID=14851264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10123062A Pending JPH11316149A (en) | 1998-05-06 | 1998-05-06 | Level detecting device of absorption refrigerating device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11316149A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010210623A (en) * | 2009-03-10 | 2010-09-24 | Nestec Sa | Optical level detector for beverage machine |
-
1998
- 1998-05-06 JP JP10123062A patent/JPH11316149A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010210623A (en) * | 2009-03-10 | 2010-09-24 | Nestec Sa | Optical level detector for beverage machine |
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