JPH1137589A - Absorption type refrigerator - Google Patents
Absorption type refrigeratorInfo
- Publication number
- JPH1137589A JPH1137589A JP9188134A JP18813497A JPH1137589A JP H1137589 A JPH1137589 A JP H1137589A JP 9188134 A JP9188134 A JP 9188134A JP 18813497 A JP18813497 A JP 18813497A JP H1137589 A JPH1137589 A JP H1137589A
- Authority
- JP
- Japan
- Prior art keywords
- refrigerant
- pressure
- heat exchanger
- pressure refrigerant
- low
- 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
- 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
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption refrigeration system.
【０００２】[0002]
【従来の技術】一般に、吸収式冷凍装置においては、単
一の冷媒とこれを吸収する吸収剤とを用い、発生器にお
ける入力熱と吸収器において発生する吸収熱とを冷媒に
より利用側熱交換器に搬送するようにしているが、単一
の冷媒の場合、蒸発圧力に対応する吸収器での冷媒吸収
量が十分に得られないところから、十分な成績係数（以
下、ＣＯＰという）が得られにくいという問題があっ
た。2. Description of the Related Art Generally, an absorption refrigeration system uses a single refrigerant and an absorbent for absorbing the same, and uses the refrigerant to exchange heat input into a generator and heat absorbed in an absorber by a refrigerant. However, in the case of a single refrigerant, a sufficient coefficient of performance (hereinafter referred to as COP) is obtained because the amount of refrigerant absorbed by the absorber corresponding to the evaporating pressure cannot be sufficiently obtained. There was a problem that it was difficult to be.
【０００３】また、塩素を含んだ分子構造をもつ冷媒
（例えば、Ｒ−２２：クロロジフルオロメタン）と各種
吸収剤とを組み合わせた吸収式冷凍装置もあるが、オゾ
ン層破壊の問題から、将来は全廃されることとなってい
る。There is also an absorption refrigeration system in which a refrigerant having a molecular structure containing chlorine (for example, R-22: chlorodifluoromethane) is combined with various absorbents. It is to be totally abolished.
【０００４】さらに、沸騰点が異なる２種以上の冷媒を
用い、複数の吸収器においてそれぞれの冷媒を段階的に
吸収させることにより、吸収熱を段階的に高温度化させ
るようにした吸収式冷凍装置も提案されている（例え
ば、特公昭６２−３２３８４号公報参照）。Furthermore, an absorption refrigeration system in which two or more kinds of refrigerants having different boiling points are used and each of the refrigerants is absorbed stepwise by a plurality of absorbers so that the heat of absorption is raised stepwise. An apparatus has also been proposed (for example, see Japanese Patent Publication No. 62-32384).
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上記公
知例の吸収式冷凍装置の場合、複数の吸収器において複
数の冷媒を吸収させるようにしているため、構造および
配管系が複雑化せざるを得ないという問題がある。However, in the absorption refrigeration apparatus of the above-mentioned known example, since a plurality of refrigerants are absorbed by a plurality of absorbers, the structure and piping system must be complicated. There is no problem.
【０００６】本願発明は、上記の点に鑑みてなされたも
ので、蒸発圧力の異なる複数の冷媒からなる混合冷媒を
用いることにより、吸収器における冷媒溶解度が可及的
に大きくなるようにすることを目的とするものである。[0006] The present invention has been made in view of the above points, and is intended to increase the solubility of refrigerant in an absorber as much as possible by using a mixed refrigerant composed of a plurality of refrigerants having different evaporation pressures. It is intended for.
【０００７】[0007]
【課題を解決するための手段】本願発明の基本構成（請
求項１の発明）では、上記課題を解決するための手段と
して、比較的蒸発圧力の低い低圧冷媒に対して該低圧冷
媒に比較して蒸発圧力の高い高圧冷媒を少なくとも１種
類を組み合わせた混合冷媒を用いている。According to the basic structure of the present invention (the invention of claim 1), as a means for solving the above-mentioned problems, a low-pressure refrigerant having a relatively low evaporation pressure is compared with the low-pressure refrigerant. In addition, a mixed refrigerant in which at least one high-pressure refrigerant having a high evaporation pressure is combined is used.
【０００８】上記のように構成したことにより、低圧冷
媒を単独で用いる場合に比べて、蒸発器での圧力が高く
なるため、吸収器での冷媒溶解度が向上する。従って、
吸収サイクルにおける溶液循環量を減少させることが可
能となり、ＣＯＰが改善できる。なお、高圧冷媒を単独
で用いると、一般に吸収液との相溶性が悪いため、ＣＯ
Ｐは低下する。[0008] With the above configuration, the pressure in the evaporator is higher than in the case where the low-pressure refrigerant is used alone, so that the solubility of the refrigerant in the absorber is improved. Therefore,
It becomes possible to reduce the amount of solution circulated in the absorption cycle, and COP can be improved. When a high-pressure refrigerant is used alone, the compatibility with the absorbing liquid is generally poor.
P decreases.
【０００９】請求項２あるいは請求項３の発明における
ように、前記低圧冷媒として１，１，１，２−テトラフ
ルオロエタンおよび（あるいは）ペンタフルオロエタン
を用い、高圧冷媒としてジフルオロメタンを用いた場
合、いずれの冷媒も塩素を含まない分子構造を有してい
るのでオゾン層破壊規制に適合できる。According to a second or third aspect of the present invention, the low-pressure refrigerant uses 1,1,1,2-tetrafluoroethane and / or pentafluoroethane and the high-pressure refrigerant uses difluoromethane. Since each of the refrigerants has a molecular structure containing no chlorine, it can comply with ozone depletion regulations.
【００１０】[0010]
【発明の実施の形態】以下、添付の図面を参照して、本
願発明の好適な実施の形態について詳述する。Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
【００１１】図１には、本願発明の実施の形態にかかる
吸収式冷凍装置の冷媒回路が示されている。FIG. 1 shows a refrigerant circuit of an absorption refrigerating apparatus according to an embodiment of the present invention.
【００１２】この吸収式冷凍装置は、加熱手段として作
用するガスバーナ１により加熱され、高温冷媒蒸気ｇ1
を発生させる発生器２と、該発生器２により発生された
高温冷媒蒸気ｇ1中に含まれる吸収剤成分を分離する気
液分離器３と、該気液分離器３から導かれる高温冷媒蒸
気ｇ1が四路切換弁１３を介して冷房運転時および暖房
運転時においてそれぞれ供給される室外熱交換器４およ
び室内熱交換器６と、該室外熱交換器４と室内熱交換器
６との間に介設された冷房用および暖房用減圧機構５
Ａ，５Ｂと、冷房運転時に前記室内熱交換器６により蒸
発気化され且つ前記四路切換弁１３を介して供給される
低温冷媒蒸気ｇ2を前記発生器２から導かれる吸収希溶
液ｌ1に吸収させる際に発生する吸収熱を回収する吸収
熱交換器７と、該吸収熱交換器７から導かれる溶液にさ
らに冷媒蒸気を吸収させる空冷吸収器８と、該空冷吸収
器８から前記吸収熱交換器７を経て前記発生器２に導か
れる途中の吸収濃溶液ｌ2に前記発生器２から前記吸収
熱交換器７に導かれる途中の吸収希溶液ｌ1の保有する
熱を回収する熱回収用溶液熱交換器９とを備えて構成さ
れている。符号１０は吸収濃溶液ｌ2を圧送するための
溶液ポンプ、１１は溶液ポンプ１０を保護するために吸
収濃溶液ｌ2を過冷却する過冷却器、１２は発生器２か
らの吸収希溶液ｌ1を減圧するための減圧機構である。This absorption type refrigeration system is heated by a gas burner 1 acting as a heating means, and a high-temperature refrigerant vapor g 1
, A gas-liquid separator 3 for separating an absorbent component contained in the high-temperature refrigerant vapor g 1 generated by the generator 2, and a high-temperature refrigerant vapor guided from the gas-liquid separator 3. g 1 is an outdoor heat exchanger 4 and the indoor heat exchanger 6 is supplied during cooling operation and during heating operation via the four-way switching valve 13, and the outdoor heat exchanger 4 and the indoor heat exchanger 6 Cooling and heating decompression mechanism 5 interposed
A, 5B and the low-temperature refrigerant vapor g 2 supplied via and is vaporized the four-way switching valve 13 by the indoor heat exchanger 6 during cooling operation to absorb a dilute solution l 1 derived from the generator 2 An absorption heat exchanger 7 for recovering the absorption heat generated during absorption; an air-cooled absorber 8 for further absorbing the refrigerant vapor into the solution led from the absorption heat exchanger 7; heat recovery for recovering heat held exchanger 7 to the generator absorbent concentrated solution l 2 of the middle led to 2 through from the generator 2 of the absorbent dilute solution l 1 of the course to be guided to the absorber heat exchanger 7 And a solution heat exchanger 9 for use. Reference numeral 10 denotes a solution pump for pumping the concentrated solution l 2 , 11 denotes a supercooler for supercooling the concentrated solution l 2 to protect the solution pump 10, and 12 denotes a dilute solution 1 from the generator 2. This is a decompression mechanism for decompressing 1 .
【００１３】この吸収式冷凍装置においては、冷房運転
時においては凝縮器として作用している室外熱交換器４
から導かれる凝縮液冷媒ｌ3（実線矢印で示す）が減圧
機構５Ｂを側路して逆止弁１４Ｂ、過冷却用気液熱交換
器１５、レシーバ１６および減圧機構５Ａを介して室内
熱交換器６に供給される一方、暖房運転時においては凝
縮器として作用している室内熱交換器６から導かれる凝
縮液冷媒ｌ3（点線矢印で示す）が減圧機構５Ａを側路
して逆止弁１４Ａ、過冷却用気液熱交換器１５、レシー
バ１６および減圧機構１４Ｂを介して室外熱交換器４に
供給されることとなっている。このようにすれば、冷房
運転時および暖房運転時において、凝縮器として作用し
ている室外熱交換器４および室内熱交換器６から導かれ
る凝縮液冷媒ｌ3が過冷却用気液熱交換器１３およびレ
シーバ１４へ供給されることとなるのである。In the absorption refrigeration system, the outdoor heat exchanger 4 acting as a condenser during the cooling operation is provided.
Refrigerant l 3 (indicated by a solid arrow) drawn from the flow path passes through the pressure reducing mechanism 5B and passes through the check valve 14B, the subcooling gas-liquid heat exchanger 15, the receiver 16, and the pressure reducing mechanism 5A for indoor heat exchange. While being supplied to the heat exchanger 6, the condensed liquid refrigerant l 3 (indicated by a dotted arrow) guided from the indoor heat exchanger 6 acting as a condenser during the heating operation is checked by way of the pressure reducing mechanism 5A. It is to be supplied to the outdoor heat exchanger 4 via the valve 14A, the subcooling gas-liquid heat exchanger 15, the receiver 16, and the pressure reducing mechanism 14B. Thus, in and during the heating operation during the cooling operation, the condensed liquid refrigerant l 3 supercooling liquid heat exchanger derived from the outdoor heat exchanger 4 and the indoor heat exchanger 6 acts as a condenser 13 and the receiver 14.
【００１４】また、吸収熱交換器７から導かれる吸収濃
溶液ｌ2に気液分離器３から導かれる高温冷媒蒸気ｇ1の
保有する熱を回収する熱回収用気液熱交換器１７が、熱
回収用溶液熱交換器９と並列に設けられている。従っ
て、吸収熱交換器７から導かれる吸収濃溶液ｌ2には、
気液分離器３から導かれる吸収希溶液ｌ1の保有する
熱、気液分離器３から導かれる冷媒蒸気ｇ1の保有する
熱が回収されることとなっているのである。Further, the heat recovery gas-liquid heat exchanger 17 for recovering heat held by the high-temperature refrigerant vapor g 1 to be guided to the absorbent concentrated solution l 2 derived from the absorber heat exchanger 7 from the gas-liquid separator 3, It is provided in parallel with the heat recovery solution heat exchanger 9. Therefore, the absorption concentrated solution l 2 guided from the absorption heat exchanger 7 includes:
Liquid heat possessed by the separator 3 absorption dilute solution l 1 derived from is the heat held by the refrigerant vapor g 1 derived from the gas-liquid separator 3 is in the to be recovered.
【００１５】上記のように構成された吸収式冷凍装置
は、次のように作用する。The absorption refrigeration system configured as described above operates as follows.
【００１６】（Ｉ） 冷房運転時 四路切換弁１３は実線方向に切り換えられており、発生
器２から発生された高温冷媒蒸気ｇ1は凝縮器として作
用する室外熱交換器４において凝縮液化され、逆止弁１
４Ｂ、過冷却用気液熱交換器１５において過冷却された
後、レシーバ１６を経て冷房用減圧機構５Ａにおいて減
圧され、その後蒸発器として作用する室内熱交換器６に
おいて蒸発気化され、その際発生せしめられる冷熱が室
内冷房用熱源として利用される。なお、室内熱交換器６
において蒸発気化された冷媒蒸気ｇ2は、四路切換弁１
３を経て吸収熱交換器７、空冷吸収器８に導かれ、気液
分離器３から導かれた吸収希溶液ｌ1に吸収され、得ら
れた吸収濃溶液ｌ2は、過冷却器１１、溶液ポンプ１
０、吸収熱交換器７、熱回収用溶液熱交換器９および熱
回収用気液熱交換器１７を経て発生器２へ還流される。[0016] (I) cooling operation during the four-way switching valve 13 is switched to the solid line direction, the high-temperature refrigerant vapor g 1 generated from the generator 2 is condensed and liquefied in the outdoor heat exchanger 4, which acts as a condenser , Check valve 1
4B, after being supercooled in the subcooling gas-liquid heat exchanger 15, passed through the receiver 16 and depressurized in the cooling decompression mechanism 5A, and then evaporated and vaporized in the indoor heat exchanger 6 acting as an evaporator. The chilled heat is used as a heat source for indoor cooling. In addition, the indoor heat exchanger 6
The refrigerant vapor g 2 evaporated and vaporized in the four-way switching valve 1
3 through the absorption heat exchanger 7, is led to the air-cooled absorber 8, is absorbed into the absorbent dilute solution l 1 derived from the gas-liquid separator 3, resulting absorbent concentrated solution l 2 are subcooler 11, Solution pump 1
The heat is returned to the generator 2 through the absorption heat exchanger 7, the heat recovery solution heat exchanger 9, and the heat recovery gas-liquid heat exchanger 17.
【００１７】（ＩＩ） 暖房運転時 四路切換弁１３は点線方向に切り換えられており、発生
器２において発生された高温冷媒蒸気ｇ1が凝縮器とし
て作用する室内熱交換器６において凝縮液化され、その
際発生せしめられる温熱が室内暖房用熱源として利用さ
れる。なお、室内熱交換器６において凝縮液化された凝
縮液冷媒ｌ3は、逆止弁１４Ａを経て、過冷却用気液熱
交換器１５において過冷却され、レシーバ１６を経て暖
房用減圧機構５Ｂにおいて減圧された後、蒸発器として
作用する室外熱交換器４において蒸発気化されて低温冷
媒蒸気ｇ2となり、その後吸収熱交換器７および吸収器
８において気液分離器３から導かれた吸収希溶液ｌ1に
吸収されて吸収濃溶液ｌ2となって過冷却器１１、溶液
ポンプ１０、吸収熱交換器７、熱回収用溶液熱交換器９
および熱回収用気液熱交換器１７を経て発生器２へ還流
される。[0017] (II) heating operation when the four-way switching valve 13 is switched to the tangential direction, the high-temperature refrigerant vapor g 1 which is generated in the generator 2 is condensed and liquefied in the indoor heat exchanger 6 which acts as a condenser The generated heat is used as a heat source for indoor heating. Incidentally, the condensed liquid refrigerant l 3, which is condensed in the indoor heat exchanger 6, through the check valve 14A, is subcooled in subcooling liquid heat exchanger 15, the pressure reducing mechanism 5B for heating via the receiver 16 After being depressurized, it is evaporated and vaporized in the outdoor heat exchanger 4 acting as an evaporator to become a low-temperature refrigerant vapor g 2 , and then the absorption dilute solution guided from the gas-liquid separator 3 in the absorption heat exchanger 7 and the absorber 8. become absorbed concentrated solution l 2 is absorbed by the l 1 subcooler 11, solution pump 10, absorbing heat exchanger 7, the heat-recovery solution heat exchanger 9
Then, it is returned to the generator 2 through the gas-liquid heat exchanger 17 for heat recovery.
【００１８】第１の実施例 この場合、上記構成の吸収式冷凍装置において、比較的
蒸発圧力の低い低圧冷媒である１，１，１，２−テトラ
フルオロエタン（ＣＦ3−ＣＨ2Ｆ）（以下、Ｒ１３４ａ
という）およびペンタフルオロエタン（Ｃ2ＨＦ5）（以
下、Ｒ１２５という）と、該低圧冷媒に比較して蒸発圧
力の高い高圧冷媒であるジフルオロメタン（ＣＨ2Ｆ2）
（以下、Ｒ３２という）とを組み合わせた混合冷媒が用
いられている。該混合冷媒は、Ｒ３２：Ｒ１２５：Ｒ１
３４ａ＝２３：２５：５２の組成を有する冷媒（以下、
Ｒ４０７Ｃという）とされている。なお、吸収剤として
は、ジエチレングリコールジメチルエーテル（以下、Ｄ
ＥＧＤＭＥという）が用いられている。First Embodiment In this case, in the absorption refrigerating apparatus having the above-mentioned structure, 1,1,1,2-tetrafluoroethane (CF 3 —CH 2 F) (CF 3 —CH 2 F) which is a low-pressure refrigerant having a relatively low evaporation pressure is used. Hereinafter, R134a
Pentafluoroethane (C 2 HF 5 ) (hereinafter referred to as R125) and difluoromethane (CH 2 F 2 ), which is a high-pressure refrigerant having a higher evaporation pressure than the low-pressure refrigerant.
(Hereinafter, referred to as R32). The mixed refrigerant is R32: R125: R1
34a = a refrigerant having a composition of 23:25:52 (hereinafter referred to as a refrigerant)
R407C). In addition, as an absorbent, diethylene glycol dimethyl ether (hereinafter, D
EGDME).
【００１９】上記した混合冷媒Ｒ４０７Ｃを用いた場
合、低圧冷媒であるＲ１３４ａあるいはＲ１２５を単独
で用いた場合に比べて、蒸発圧力が高くなる。例えば、
図２に示すように、Ｒ１３４ａあるいはＲ１２５単独の
場合、蒸発圧力は３ｋｇ／ｃｍ2程度であるのに対して
Ｒ４０７Ｃの場合６ｋｇ／ｃｍ2となる。すると、吸収
熱交換器７および空冷吸収器８における吸収冷媒の組成
（換言すれば、冷媒溶解度）が大幅に高くなる。即ち、
低圧冷媒であるＲ１３４ａおよびＲ１２５の冷媒溶解度
が、Ａ→ＢおよびＣ→Ｄへと大幅に高くなる。なお、高
圧冷媒であるＲ３２の冷媒溶解度はＥ→Ｆへとあまり高
くならないが、Ｒ４０７Ｃ全体としての冷媒溶解度が大
幅に高くなる。従って、吸収サイクルにおける溶液循環
量を多くしなくとも冷媒の吸収が十分に得られるところ
から、ＣＯＰが向上することとなる。また、発生器２に
おける加熱量の節約ができ、ランニングコストが低減で
きる。本実施の形態におけるように、Ｒ４０７ＣとＤＥ
ＧＤＭＥとの組み合わせでは、蒸発温度５℃、凝縮温度
４５℃の空冷条件で、ＣＯＰ＝０．８９を達成すること
ができた。When the above-described mixed refrigerant R407C is used, the evaporation pressure becomes higher than when the low-pressure refrigerant R134a or R125 is used alone. For example,
As shown in FIG. 2, in the case of R134a or R125 alone, the evaporation pressure is about 3 kg / cm 2 , whereas in the case of R407C, it is 6 kg / cm 2 . Then, the composition of the absorbing refrigerant (in other words, the solubility of the refrigerant) in the absorption heat exchanger 7 and the air-cooled absorber 8 is significantly increased. That is,
The refrigerant solubilities of the low-pressure refrigerants R134a and R125 greatly increase from A to B and C to D. The refrigerant solubility of R32, which is a high-pressure refrigerant, does not increase so much from E to F, but the refrigerant solubility of R407C as a whole increases significantly. Therefore, the COP is improved because the absorption of the refrigerant can be sufficiently obtained without increasing the circulation amount of the solution in the absorption cycle. Further, the amount of heating in the generator 2 can be saved, and the running cost can be reduced. As in this embodiment, R407C and DE
In combination with GDME, COP = 0.89 was able to be achieved under air cooling conditions at an evaporation temperature of 5 ° C. and a condensation temperature of 45 ° C.
【００２０】また、低圧冷媒（即ち、Ｒ１３４ａ、Ｒ１
２５）に対して少ない量の高圧冷媒（即ち、Ｒ３２）を
含むようにしているが、Ｒ３２は下記表１に示すよう
に、低圧冷媒に比べて蒸発潜熱が大きいため、溶液循環
比が少なくてすむところから、ＣＯＰが向上する。Also, low-pressure refrigerants (ie, R134a, R1
25), a small amount of high-pressure refrigerant (that is, R32) is contained, but as shown in Table 1 below, R32 has a large latent heat of vaporization as compared with low-pressure refrigerant, and therefore requires a small solution circulation ratio. Therefore, the COP is improved.
【００２１】[0021]
【表１】 [Table 1]
【００２２】しかも、いずれの冷媒（Ｒ１３４ａ、Ｒ１
２５、Ｒ３２）も塩素を含まない分子構造を有している
のでオゾン層破壊規制に適合できる。In addition, any refrigerant (R134a, R1
25, R32) also has a molecular structure that does not contain chlorine, and thus can conform to ozone depletion regulations.
【００２３】第２の実施例 この場合、上記構成の吸収式冷凍装置において、低圧冷
媒であるＲ１２５と、高圧冷媒であるＲ３２とを組み合
わせた混合冷媒が用いられている。該混合冷媒は、Ｒ３
２：Ｒ１２５＝４５：５５の組成を有する冷媒（以下、
Ｒ４１０Ｂ）という）とされている。なお、吸収剤とし
ては、ＤＥＧＤＭＥが用いられている。この場合にも、
第１の実施例と同様な作用効果が得られる。Second Embodiment In this case, in the absorption refrigeration system having the above structure, a mixed refrigerant in which R125 as a low-pressure refrigerant and R32 as a high-pressure refrigerant are combined is used. The mixed refrigerant is R3
A refrigerant having a composition of 2: R125 = 45: 55 (hereinafter, referred to as a refrigerant)
R410B)). Note that DEGDME is used as the absorbent. Again, in this case,
The same operation and effect as those of the first embodiment can be obtained.
【００２４】なお、上記実施例以外の低圧冷媒と高圧冷
媒との組み合わせとしては、以下に挙げるものがある。Other combinations of the low-pressure refrigerant and the high-pressure refrigerant other than the above-described embodiment include the following.
【００２５】Ｒ４０１Ａ 高圧冷媒であるクロロジフルオロメタン（ＣＨＦ2Ｃ
ｌ）（以下Ｒ２２という）と低圧冷媒である１，１−ジ
フルオロエタン（ＣＨＦ2ＣＨ3）（以下Ｒ１５２ａとい
う）および１−クロロ−１，２，２，２−テトラフルオ
ロエタン（ＣＨＦＣｌ−ＣＨ3）との組み合わせであ
り、（Ｒ２２：Ｒ１５２ａ：Ｒ１２４＝５３：１３：３
４）とされる。この場合、高圧冷媒の方が低圧冷媒より
多くなるとともに、塩素を含む分子構造を有している。R401A High pressure refrigerant chlorodifluoromethane (CHF 2 C
1) (hereinafter referred to as R22) and 1,1-difluoroethane (CHF 2 CH 3 ) (hereinafter referred to as R152a) and 1-chloro-1,2,2,2-tetrafluoroethane (CHFCl-CH 3 ) which are low-pressure refrigerants And (R22: R152a: R124 = 53: 13: 3
4). In this case, the high-pressure refrigerant has a higher molecular weight than the low-pressure refrigerant and has a molecular structure containing chlorine.
【００２６】Ｒ４０１Ｂ 高圧冷媒であるＲ２２と低圧冷媒であるＲ１５２ａおよ
びＲ１２４との組み合わせであり、（Ｒ２２：Ｒ１５２
ａ：Ｒ１２４＝６１：１１：２８）とされる。この場
合、高圧冷媒の方が低圧冷媒より多くなるとともに、塩
素を含む分子構造を有している。R401B is a combination of R22, which is a high-pressure refrigerant, and R152a and R124, which are low-pressure refrigerants, wherein (R22: R152
a: R124 = 61: 11: 28). In this case, the high-pressure refrigerant has a higher molecular weight than the low-pressure refrigerant and has a molecular structure containing chlorine.
【００２７】Ｒ４０４Ａ 高圧冷媒であるＲ１２５および１、１、１−トリフルオ
ロエタン（ＣＦ3−ＣＨ3）（以下Ｒ１４３ａという）と
低圧冷媒であるＲ１３４ａとの組み合わせであり、（Ｒ
１２５：Ｒ１４３ａ：Ｒ１３４ａ＝４４：５２：４）と
される。この場合、高圧冷媒の方が低圧冷媒より多くな
るとともに、塩素を含まない分子構造を有している。R404A is a combination of R125 and 1,1,1-trifluoroethane (CF 3 —CH 3 ) (hereinafter referred to as R143a) which are high-pressure refrigerants and R134a which is a low-pressure refrigerant.
125: R143a: R134a = 44: 52: 4). In this case, the high-pressure refrigerant has a higher molecular weight than the low-pressure refrigerant and has a molecular structure containing no chlorine.
【００２８】Ｒ４０７Ａ 高圧冷媒であるＲ３２と低圧冷媒であるＲ１２５および
Ｒ１３４ａとの組み合わせであり、（Ｒ３２：Ｒ１２
５：Ｒ１３４ａ＝２０：４０：４０）とされる。この場
合、低圧冷媒の方が高圧冷媒より多くなるとともに、塩
素を含まない分子構造を有している。R407A is a combination of R32 which is a high-pressure refrigerant and R125 and R134a which are low-pressure refrigerants.
5: R134a = 20: 40: 40). In this case, the low-pressure refrigerant has a higher molecular weight than the high-pressure refrigerant and has a molecular structure containing no chlorine.
【００２９】Ｒ４０７Ｂ 高圧冷媒であるＲ３２と低圧冷媒であるＲ１２５および
Ｒ１３４ａとの組み合わせであり、（Ｒ３２：Ｒ１２
５：Ｒ１３４ａ＝１０：７０：２０）とされる。この場
合、低圧冷媒の方が高圧冷媒より多くなるとともに、塩
素を含まない分子構造を有している。R407B A combination of R32 which is a high-pressure refrigerant and R125 and R134a which are low-pressure refrigerants, wherein (R32: R12
5: R134a = 10: 70: 20). In this case, the low-pressure refrigerant has a higher molecular weight than the high-pressure refrigerant and has a molecular structure containing no chlorine.
【００３０】Ｒ４１０Ａ 高圧冷媒であるＲ３２と低圧冷媒であるＲ１２５との組
み合わせであり、（Ｒ３２：Ｒ１２５＝５０：５０）と
される。この場合、低圧冷媒と高圧冷媒とが同量となる
とともに、塩素を含まない分子構造を有している。R410A A combination of R32 as a high-pressure refrigerant and R125 as a low-pressure refrigerant, where R32: R125 = 50: 50. In this case, the low-pressure refrigerant and the high-pressure refrigerant have the same amount, and have a molecular structure containing no chlorine.
【００３１】Ｒ４１０ＪＡ 高圧冷媒であるＲ３２と低圧冷媒であるＲ１２５との組
み合わせであり、（Ｒ３２：Ｒ１２５＝４８：５２）と
される。この場合、低圧冷媒の方が高圧冷媒より多くな
るとともに、塩素を含まない分子構造を有している。R410JA A combination of R32 which is a high-pressure refrigerant and R125 which is a low-pressure refrigerant, and is expressed as (R32: R125 = 48: 52). In this case, the low-pressure refrigerant has a higher molecular weight than the high-pressure refrigerant and has a molecular structure containing no chlorine.
【００３２】Ｒ４１２Ａ 高圧冷媒であるＲ２２およびパーフルオロプロパン（Ｃ
3Ｆ8）（以下Ｒ２１８という）と低圧冷媒である１−ク
ロロ−１，１−ジフルオロエタン（ＣＦ2Ｃｌ−ＣＨ3）
（以下Ｒ１４２ｂという）との組み合わせであり、（Ｒ
２２：Ｒ２１８：Ｒ１４２ｂ＝７０：５：２５）とされ
る。この場合、高圧冷媒の方が低圧冷媒より多くなると
ともに、塩素を含む分子構造を有している。R412A R22 as a high-pressure refrigerant and perfluoropropane (C
3 F 8) (hereinafter referred to as R218) and is low-pressure refrigerant 1-chloro-1,1-difluoroethane (CF 2 Cl-CH 3)
(Hereinafter referred to as R142b) and (R142b).
22: R218: R142b = 70: 5: 25). In this case, the high-pressure refrigerant has a higher molecular weight than the low-pressure refrigerant and has a molecular structure containing chlorine.
【００３３】Ｒ４０７Ｄ 高圧冷媒であるＲ３２と低圧冷媒であるＲ１２５および
Ｒ１３４ａとの組み合わせであり、（Ｒ３２：Ｒ１２
５：Ｒ１３４ａ＝１５：１５：７０）とされる。この場
合、低圧冷媒の方が高圧冷媒より多くなるとともに、塩
素を含まない分子構造を有している。R407D is a combination of R32 which is a high-pressure refrigerant and R125 and R134a which are low-pressure refrigerants, wherein (R32: R12
5: R134a = 15: 15: 70). In this case, the low-pressure refrigerant has a higher molecular weight than the high-pressure refrigerant and has a molecular structure containing no chlorine.
【００３４】10Ｒ９００ＪＡ 高圧冷媒であるＲ３２と低圧冷媒であるＲ１３４ａとの
組み合わせであり、（Ｒ３２：Ｒ１３４ａ＝３０：７
０）とされる。この場合、低圧冷媒の方が高圧冷媒より
多くなるとともに、塩素を含まない分子構造を有してい
る。10R900JA A combination of R32 which is a high-pressure refrigerant and R134a which is a low-pressure refrigerant, where (R32: R134a = 30: 7
0). In this case, the low-pressure refrigerant has a higher molecular weight than the high-pressure refrigerant and has a molecular structure containing no chlorine.
【００３５】11Ｒ５０９Ａ 高圧冷媒であるＲ２２と低圧冷媒であるＲ２１８との組
み合わせであり、（Ｒ２２：Ｒ２１８＝４４：５６）と
される。この場合、低圧冷媒の方が高圧冷媒より多くな
るとともに、塩素を含む分子構造を有している。11R509A This is a combination of R22 which is a high-pressure refrigerant and R218 which is a low-pressure refrigerant, and is expressed as (R22: R218 = 44: 56). In this case, the low-pressure refrigerant has a higher molecular weight than the high-pressure refrigerant and has a molecular structure containing chlorine.
【００３６】また、吸収剤としては、上記ＤＥＧＤＭＥ
以外の有機溶剤または冷凍機油が使用可能である。例え
ば、ＴＥＧＤＭＥ:ビス（１，２−２−メトキシエトキ
シエタン、ＤＭＦ:Ｎ，Ｎ−ジメチルホルムアミド、Ｄ
ＭＡ:Ｎ，Ｎ−ジメチルアセトアミド等が使用できる。As the absorbent, the above DEGDME is used.
Other organic solvents or refrigeration oils can be used. For example, TEGDME: bis (1,2-methoxyethoxyethane, DMF: N, N-dimethylformamide, D
MA: N, N-dimethylacetamide and the like can be used.
【００３７】[0037]
【発明の効果】本願発明の基本構成（請求項１の発明）
によれば、比較的蒸発圧力の低い低圧冷媒に対して該低
圧冷媒に比較して蒸発圧力の高い高圧冷媒を少なくとも
１種類を組み合わせた混合冷媒を用いて、低圧冷媒を単
独で用いる場合に比べて、蒸発器での圧力が高くなるよ
うにしたので、吸収器での冷媒溶解度が向上し、吸収サ
イクルにおける溶液循環量を減少させることが可能とな
り、ＣＯＰが改善できる。なお、高圧冷媒を単独で用い
ると、一般に吸収液との相溶性が悪いため、ＣＯＰは低
下するという優れた効果がある。また、発生器２におけ
る加熱量の節約ができ、ランニングコストが低減できる
という効果もある。The basic structure of the present invention (the invention of claim 1)
According to the comparative example, a low-pressure refrigerant having a relatively low evaporation pressure is compared with a low-pressure refrigerant using a mixed refrigerant obtained by combining at least one type of a high-pressure refrigerant having a high evaporation pressure as compared with the low-pressure refrigerant, compared with a case where the low-pressure refrigerant is used alone Since the pressure in the evaporator is increased, the solubility of the refrigerant in the absorber is improved, the amount of circulating solution in the absorption cycle can be reduced, and the COP can be improved. In addition, when the high-pressure refrigerant is used alone, there is an excellent effect that COP is reduced because the compatibility with the absorbing liquid is generally poor. In addition, there is an effect that the amount of heating in the generator 2 can be saved and the running cost can be reduced.
【００３８】請求項２あるいは請求項３の発明における
ように、前記低圧冷媒として１，１，１，２−テトラフ
ルオロエタンおよび（あるいは）ペンタフルオロエタン
を用い、高圧冷媒としてジフルオロメタンを用いた場
合、いずれの冷媒も塩素を含まない分子構造を有してい
るのでオゾン層破壊規制に適合できる。According to the second or third aspect of the present invention, when 1,1,1,2-tetrafluoroethane and / or pentafluoroethane is used as the low-pressure refrigerant and difluoromethane is used as the high-pressure refrigerant Since each of the refrigerants has a molecular structure containing no chlorine, it can comply with ozone depletion regulations.
【図１】本願発明の実施の形態にかかる吸収式冷凍装置
の冷媒回路図である。FIG. 1 is a refrigerant circuit diagram of an absorption refrigeration apparatus according to an embodiment of the present invention.
【図２】本願発明の実施の形態にかかる吸収式冷凍装置
において用いられ低圧冷媒（Ｒ１３４ａ、Ｒ１２５）お
よび高圧冷媒（Ｒ３２）の４５℃における圧力と組成と
の関係を示す特性図である。FIG. 2 is a characteristic diagram showing a relationship between pressure and composition at 45 ° C. of low-pressure refrigerants (R134a, R125) and high-pressure refrigerant (R32) used in the absorption refrigeration apparatus according to the embodiment of the present invention.
２は発生器、４は室外熱交換器、５Ａは冷房用減圧機
構、５Ｂは暖房用減圧機構、６は室内熱交換器、７は吸
収熱交換器、８は吸収器（空冷吸収器）、１３は四路切
換弁。2 is a generator, 4 is an outdoor heat exchanger, 5A is a decompression mechanism for cooling, 5B is a decompression mechanism for heating, 6 is an indoor heat exchanger, 7 is an absorption heat exchanger, 8 is an absorber (air cooling absorber), 13 is a four-way switching valve.
Claims (3)
該低圧冷媒に比較して蒸発圧力の高い高圧冷媒を少なく
とも１種類を組み合わせた混合冷媒を用いたことを特徴
とする吸収式冷凍装置。1. An absorption refrigeration system using a mixed refrigerant obtained by combining at least one type of high-pressure refrigerant having a higher evaporation pressure than a low-pressure refrigerant with respect to a low-pressure refrigerant having a relatively low evaporation pressure. .
トラフルオロエタンおよびペンタフルオロエタンを用
い、高圧冷媒としてジフルオロメタンを用いたことを特
徴とする前記請求項１記載の吸収式冷凍装置。2. The absorption refrigeration system according to claim 1, wherein 1,1,1,2-tetrafluoroethane and pentafluoroethane are used as the low-pressure refrigerant and difluoromethane is used as the high-pressure refrigerant. .
ンを用い、前記高圧冷媒としてジフルオロメタンを用い
たことを特徴とする前記請求項１記載の吸収式冷凍装
置。3. The absorption refrigeration system according to claim 1, wherein pentafluoroethane is used as the low-pressure refrigerant, and difluoromethane is used as the high-pressure refrigerant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9188134A JPH1137589A (en) | 1997-07-14 | 1997-07-14 | Absorption type refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9188134A JPH1137589A (en) | 1997-07-14 | 1997-07-14 | Absorption type refrigerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1137589A true JPH1137589A (en) | 1999-02-12 |
Family
ID=16218340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9188134A Pending JPH1137589A (en) | 1997-07-14 | 1997-07-14 | Absorption type refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1137589A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170167767A1 (en) * | 2014-02-06 | 2017-06-15 | Carrier Corporation | Ejector Cycle Heat Recovery Refrigerant Separator |
-
1997
- 1997-07-14 JP JP9188134A patent/JPH1137589A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170167767A1 (en) * | 2014-02-06 | 2017-06-15 | Carrier Corporation | Ejector Cycle Heat Recovery Refrigerant Separator |
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