JP3546102B2 - Engine driven air conditioner - Google Patents

Engine driven air conditioner Download PDF

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Publication number
JP3546102B2
JP3546102B2 JP29060295A JP29060295A JP3546102B2 JP 3546102 B2 JP3546102 B2 JP 3546102B2 JP 29060295 A JP29060295 A JP 29060295A JP 29060295 A JP29060295 A JP 29060295A JP 3546102 B2 JP3546102 B2 JP 3546102B2
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Japan
Prior art keywords
heat exchanger
outdoor heat
radiator
outside air
engine
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Expired - Fee Related
Application number
JP29060295A
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Japanese (ja)
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JPH09113061A (en
Inventor
鈴木　　寛
立二 森島
実 花井
道雄 米田
忠広 加藤
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Mitsubishi Heavy Industries Ltd
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Mitsubishi Heavy Industries Ltd
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Filing date
Publication date
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Priority to JP29060295A priority Critical patent/JP3546102B2/en
Publication of JPH09113061A publication Critical patent/JPH09113061A/en
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    • 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
    • Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine

Description

【０００１】
【発明の属する技術分野】
本発明は水冷式のエンジンより駆動される圧縮機を具備する空気調和機に関する。
【０００２】
【従来の技術】
従来のこの種空気調和機の系統図が図３に示されている。
水冷式エンジン１によって駆動される圧縮機２、四方弁３、室外熱交換器４、絞り機構５、室内熱交換器６を冷媒配管で接続することによって冷凍サイクルが構成されている。
【０００３】
冷房運転時、エンジン１によって圧縮機２が駆動されると、この圧縮機２から吐出されたガス冷媒は実線矢印で示すように、四方弁３を経て室外熱交換器４に入り、ここで室外フアン７により送風される外気に放熱することによって凝縮液化する。
【０００４】
この液冷媒は絞り機構５を流過する過程で断熱膨張した後、室内熱交換器６に入り、ここで室内フアン８により送風される室内空気を冷却することによって蒸発気化する。しかる後、このガス冷媒は四方弁３を経て圧縮機２に戻る。
【０００５】
暖房運転時には、四方弁３が上記と逆方向に切り換えられ、圧縮機２から吐出された冷媒は破線矢印で示すように、四方弁３、室内熱交換器６、絞り機構５、室外熱交換器４、四方弁３をこの順に経て圧縮機２に戻る。
【０００６】
エンジン１を冷却することによって昇温した冷却水はラジェータ９に入り、ここでラジェータフアン１０により送風される外気に放熱することによって降温した後、冷却水循環ポンプ１１により付勢されてエンジン１に戻る。
【０００７】
【発明が解決しようとする課題】
上記従来の空気調和機においては、その冷房運転時外気温度が低下すると、室外熱交換器４の放熱量が増大することによってその凝縮能力が増大するので、室内熱交換器６で蒸発し切れなかった液冷媒が圧縮機１に戻って圧縮機１が損傷するという不具合があった。
【００１０】
【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、水冷式エンジンによって駆動される圧縮機、室外熱交換器、絞り機構、室内熱交換器よりなる冷凍サイクルと、上記水冷式エンジンの冷却水放熱用ラジェータを具備するエンジン駆動式空気調和機において、上記ラジェータと並列に接続されたサブラジェータを上記室外熱交換器と熱交換可能に設置するとともに、上記サブラジェータへの冷却水循環量を加減する流量調整弁と、外気温度を検出する外気温センサーと、上記室外熱交換器の凝縮圧力を検出する凝縮圧力センサーと、上記外気温センサー及び凝縮圧力センサーの検出値に応じて上記流量調整弁の開度を調整することによって上記室外熱交換器の凝縮能力を制御するコントローラを設けたことを特徴とするエンジン駆動式空気調和機にある。
【００１１】
しかして、冷房運転時、外気温度及び凝縮圧力に応じてコントローラにより流量調整弁の開度を調整することによって室外熱交換器の凝縮能力を制御する。
【００１２】
【発明の実施の形態】
本発明の第１の実施形態が図１及び図２に示されている。
図１に示すように、ラジェータ９と並列にサブラジェータ１２が接続され、このサブラジェータ１２は室外熱交換器４と熱交換可能に設置されている。
サブラジェータ１２の冷却水入口には冷却水循環量を加減するための流量調整弁１３が設けられ、この流量調整弁１３の開度はコントローラ１４によって制御される。
【００１８】
外気温センサー１５によって検出された外気温度及び圧力センサー１６によって検出された室外熱交換器４の出口の冷媒圧力がコントローラ１４Ａに入力されるようになっている。
他の構成は図３に示す従来のものと同様であり、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。
【００１９】
コントローラ１４Ａの制御フローチャートが図２に示されている。
空気調和機の運転が開始されると、外気温センサー１５によって外気温度が検出される。検出された外気温が設定温度以下のとき圧力センサー１６によって室外熱交換器４の凝縮圧力が検出され、この凝縮圧力に基づいてＰＩＤ 演算、ファジィ演算することによって流量調整弁１３の開度が決定される。
決定された開度は流量調整弁１３に出力され、この開度を決定された開度とする。
【００２０】
しかして、外気温度及び凝縮圧力に応じて流量調整弁１３の開度が決定されるので、室外熱交換器４の凝縮能力を正確に制御できる。
【００２１】
【発明の効果】
本発明においては、外気温センサー及び凝縮圧力センサーの検出値に応じて流量調整弁の開度を調整することによって室外熱交換器の凝縮能力を制御するので、冷房低外気温時に冷媒が圧縮機に戻るのを防止して圧縮機の信頼性を向上しうるとともに室外熱交換器の凝縮能力を正確に制御しうる。
【図面の簡単な説明】
【図１】本発明の実施形態を示す系統図である。
【図２】上記実施形態のフローチャートである。
【図３】従来のエンジン駆動式空気調和機の系統図である。
【符号の説明】
１ エンジン
２ 圧縮機
４ 室外熱交換器
５ 絞り機構
６ 室内熱交換器
９ ラジエータ
１２ サブラジエータ
１３ 流量調整弁
１５ 外気温センサー
１４ コントローラ[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an air conditioner having a compressor driven by a water-cooled engine.
[0002]
[Prior art]
System diagram this type of conventional air conditioner is shown in FIG.
A refrigeration cycle is configured by connecting a compressor 2, a four-way valve 3, an outdoor heat exchanger 4, an expansion mechanism 5, and an indoor heat exchanger 6 driven by a water-cooled engine 1 by a refrigerant pipe.
[0003]
During the cooling operation, when the compressor 2 is driven by the engine 1, the gas refrigerant discharged from the compressor 2 enters the outdoor heat exchanger 4 through the four-way valve 3 as shown by the solid line arrow, where It is condensed and liquefied by radiating heat to the outside air blown by the fan 7.
[0004]
The liquid refrigerant adiabatically expands in the process of flowing through the throttle mechanism 5 and then enters the indoor heat exchanger 6 where it evaporates and vaporizes by cooling the indoor air blown by the indoor fan 8. Thereafter, the gas refrigerant returns to the compressor 2 via the four-way valve 3.
[0005]
At the time of the heating operation, the four-way valve 3 is switched in the opposite direction to the above, and the refrigerant discharged from the compressor 2 has the four-way valve 3, the indoor heat exchanger 6, the throttle mechanism 5, the outdoor heat exchanger 4. Return to the compressor 2 via the four-way valve 3 in this order.
[0006]
The cooling water that has been heated by cooling the engine 1 enters the radiator 9, where it cools by radiating heat to the outside air blown by the radiator fan 10, and is energized by the cooling water circulation pump 11 to return to the engine 1. .
[0007]
[Problems to be solved by the invention]
In the above-mentioned conventional air conditioner, when the outside air temperature decreases during the cooling operation, the amount of heat radiated from the outdoor heat exchanger 4 increases, so that the condensation capacity increases. There was a problem that the liquid refrigerant returned to the compressor 1 and the compressor 1 was damaged.
[0010]
[Means for Solving the Problems]
The present invention was invented to solve the above problems, it is an Abstract of their a compressor driven by a water-cooled engine, an outdoor heat exchanger, throttle mechanism, consisting of the indoor heat exchanger In a refrigeration cycle and an engine-driven air conditioner including a radiator for radiating cooling water of the water-cooled engine, a sub-radiator connected in parallel with the radiator is installed so as to be able to exchange heat with the outdoor heat exchanger, A flow regulating valve for adjusting the amount of cooling water circulating to the sub-radiator, an outside air temperature sensor for detecting the outside air temperature, a condensing pressure sensor for detecting the condensing pressure of the outdoor heat exchanger, the outside air temperature sensor and the condensing pressure sensor A controller that controls the condensation capacity of the outdoor heat exchanger by adjusting the opening of the flow control valve in accordance with the detected value of In an engine driving type air conditioner according to claim.
[0011]
During the cooling operation, the controller controls the opening degree of the flow control valve according to the outside air temperature and the condensing pressure to control the condensing capacity of the outdoor heat exchanger.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
A first embodiment of the present invention is shown in FIGS.
As shown in FIG. 1, a sub radiator 12 is connected in parallel with the radiator 9, and the sub radiator 12 is installed so as to be able to exchange heat with the outdoor heat exchanger 4.
At the cooling water inlet of the sub radiator 12, a flow regulating valve 13 for adjusting the cooling water circulation amount is provided, and the opening of the flow regulating valve 13 is controlled by a controller 14.
[0018]
The outside air temperature detected by the outside air temperature sensor 15 and the refrigerant pressure at the outlet of the outdoor heat exchanger 4 detected by the pressure sensor 16 are input to the controller 14A.
The other configuration is the same as that of the conventional one shown in FIG.
[0019]
Control flowchart of the controller 14A is shown in FIG.
When the operation of the air conditioner is started, the outside air temperature is detected by the outside air temperature sensor 15. When the detected outside air temperature is equal to or lower than the set temperature, the condensing pressure of the outdoor heat exchanger 4 is detected by the pressure sensor 16, and PID calculation and fuzzy calculation are performed based on the condensing pressure to determine the opening of the flow control valve 13. Is done.
The determined opening is output to the flow control valve 13, and this opening is set as the determined opening.
[0020]
Thus, since the opening of the flow control valve 13 is determined according to the outside air temperature and the condensation pressure, the condensation capacity of the outdoor heat exchanger 4 can be accurately controlled.
[0021]
【The invention's effect】
In the present invention, the condensing capacity of the outdoor heat exchanger is controlled by adjusting the opening of the flow control valve in accordance with the detection values of the outside air temperature sensor and the condensing pressure sensor. , The reliability of the compressor can be improved, and the condensation capacity of the outdoor heat exchanger can be accurately controlled.
[Brief description of the drawings]
1 is a system diagram showing a implementation form of the present invention.
2 is a flow chart of the implementation forms.
FIG. 3 is a system diagram of a conventional engine-driven air conditioner.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Engine 2 Compressor 4 Outdoor heat exchanger 5 Throttle mechanism 6 Indoor heat exchanger 9 Radiator 12 Sub-radiator 13 Flow control valve 15 Outside temperature sensor 14 Controller

Claims (1)

水冷式エンジンによって駆動される圧縮機、室外熱交換器、絞り機構、室内熱交換器よりなる冷凍サイクルと、上記水冷式エンジンの冷却水放熱用ラジェータを具備するエンジン駆動式空気調和機において、
上記ラジェータと並列に接続されたサブラジェータを上記室外熱交換器と熱交換可能に設置するとともに、上記サブラジェータへの冷却水循環量を加減する流量調整弁と、外気温度を検出する外気温センサーと、上記室外熱交換器の凝縮圧力を検出する凝縮圧力センサーと、上記外気温センサー及び凝縮圧力センサーの検出値に応じて上記流量調整弁の開度を調整することによって上記室外熱交換器の凝縮能力を制御するコントローラを設けたことを特徴とするエンジン駆動式空気調和機。In a compressor driven by a water-cooled engine, an outdoor heat exchanger, a throttle mechanism, a refrigeration cycle including an indoor heat exchanger, and an engine-driven air conditioner including a radiator for radiating cooling water of the water-cooled engine,
A sub-radiator connected in parallel with the radiator is installed so as to be capable of exchanging heat with the outdoor heat exchanger, and a flow control valve for adjusting a cooling water circulation amount to the sub-radiator, and an outside air temperature sensor for detecting an outside air temperature. A condensing pressure sensor for detecting the condensing pressure of the outdoor heat exchanger, and a condensing pressure of the outdoor heat exchanger by adjusting an opening degree of the flow control valve in accordance with detection values of the outside air temperature sensor and the condensing pressure sensor. An engine-driven air conditioner comprising a controller for controlling the capacity.
JP29060295A 1995-10-13 1995-10-13 Engine driven air conditioner Expired - Fee Related JP3546102B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP29060295A JP3546102B2 (en) 1995-10-13 1995-10-13 Engine driven air conditioner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP29060295A JP3546102B2 (en) 1995-10-13 1995-10-13 Engine driven air conditioner

Publications (2)

Publication Number Publication Date
JPH09113061A JPH09113061A (en) 1997-05-02
JP3546102B2 true JP3546102B2 (en) 2004-07-21

Family

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Application Number Title Priority Date Filing Date
JP29060295A Expired - Fee Related JP3546102B2 (en) 1995-10-13 1995-10-13 Engine driven air conditioner

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6640889B1 (en) * 2002-03-04 2003-11-04 Visteon Global Technologies, Inc. Dual loop heat and air conditioning system
CN115164427B (en) * 2022-08-04 2023-12-19 南京天加环境科技有限公司 Gas heat pump device, control method thereof and air conditioning system

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