JPH03294750A - Freezing apparatus - Google Patents
Freezing apparatusInfo
- Publication number
- JPH03294750A JPH03294750A JP9670890A JP9670890A JPH03294750A JP H03294750 A JPH03294750 A JP H03294750A JP 9670890 A JP9670890 A JP 9670890A JP 9670890 A JP9670890 A JP 9670890A JP H03294750 A JPH03294750 A JP H03294750A
- Authority
- JP
- Japan
- Prior art keywords
- condenser
- refrigerant
- valve
- compressor
- circuit
- 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
- 230000008014 freezing Effects 0.000 title 1
- 238000007710 freezing Methods 0.000 title 1
- 239000003507 refrigerant Substances 0.000 claims abstract description 34
- 239000007788 liquid Substances 0.000 claims abstract description 22
- 238000005057 refrigeration Methods 0.000 claims description 22
- 238000007906 compression Methods 0.000 claims description 4
- 238000004134 energy conservation Methods 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 13
- 239000007791 liquid phase Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 238000004781 supercooling Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/13—Economisers
-
- 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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/23—Separators
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、冷凍装置の改良に係り、特に回転式圧縮機
の特性を生かして省エネルギー化を図った冷凍装置に関
するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to improvement of a refrigeration system, and particularly relates to a refrigeration system that takes advantage of the characteristics of a rotary compressor to save energy.
従来の冷凍装置において省エネルギー化を図ったものは
数多く考え出されているが、既知の冷凍サイクルのサブ
クールを増加させるために、他からの入力を必要とする
ものか殆んどであった。Although many conventional refrigeration systems have been devised to save energy, most of them require input from other sources in order to increase the subcooling capacity of known refrigeration cycles.
第４図は例えば特開昭５６−３４０６９号公報に示され
たこの種従来の冷凍装置の構成を示す冷媒回路図である
。図において、（１）は圧縮機、（２）はこの圧縮機（
１）の吐出側に接続された凝縮器、（３）はこの凝縮器
（２１の出口側に接続された第１膨張弁、（４）はこの
第１膨張弁（３）の出口側に接続された気液分離器で、
液相部（４ａ）と気相部（４ｂ）を有している。FIG. 4 is a refrigerant circuit diagram showing the configuration of a conventional refrigeration system of this type, which is disclosed in, for example, Japanese Patent Laid-Open No. 56-34069. In the figure, (1) is a compressor, (2) is this compressor (
A condenser connected to the discharge side of 1), (3) a first expansion valve connected to the outlet side of this condenser (21), and (4) connected to the outlet side of this first expansion valve (3). The gas-liquid separator
It has a liquid phase part (4a) and a gas phase part (4b).
（５１は気液分離器（４）の液相部（４ａ）側と接続さ
れた第２膨張弁、（６）はこの第２膨張弁（５）の出口
側に接続された第１蒸発器であり、これら（１）ないし
く６）は順次接続されて主冷媒回路Ｃ１を構成している
。(51 is a second expansion valve connected to the liquid phase part (4a) side of the gas-liquid separator (4), and (6) is a first evaporator connected to the outlet side of this second expansion valve (5). These (1) to 6) are connected in sequence to constitute the main refrigerant circuit C1.
（１１）は圧縮機（１）とは別の第２圧縮機、（１２）
はこの第２圧縮機（１１）の吐出側と凝縮器（２）の入
口側とを連通ずる管路中に接続され、吐出方向の流れを
許容する第１逆止弁、（１３）は気液分離器（４）の液
相部（４ａ）と接続された第２蒸発器、（１４）はこの
第２蒸発器（１３）の出口側に接続され、気液分離器（
４）と第２ｍ張弁（５）とを連通する管路に接触して設
けられた熱交換器、（１５）は熱交換器（１４）の出口
側に接続され感温部の温度か下ると弁が絞られ、温度が
上ると弁が開放するように制御される蒸発圧力調整弁で
、出口側は第２圧縮機（１１）の吸込側に接続されてい
る。（１６）は第１の蒸発器（６）の出口側と第２圧縮
機（Ｉｆ）の吸込側とを連通ずる管路中に接続され、吸
込方向の流れを許容する第２逆止弁、（Ｉ７）は気液分
離器（４）の気相部（４ｂ）と第２圧縮機（１１）の吸
込側との間に接続された絞り弁である。そして、これら
（１１）ないしく１５）は主冷媒回路Ｃ１を構成する凝
縮器（２）、膨張弁（３）および気液分離器（イ）を共
通として順次接続され副冷媒回路Ｃ２を構成している。(11) is a second compressor different from compressor (1); (12)
(13) is a first check valve connected to a pipe connecting the discharge side of the second compressor (11) and the inlet side of the condenser (2) and allows flow in the discharge direction; The second evaporator (14) connected to the liquid phase part (4a) of the liquid separator (4) is connected to the outlet side of this second evaporator (13), and the second evaporator (14) is connected to the liquid phase part (4a) of the liquid separator (4).
A heat exchanger (15) provided in contact with the pipe line communicating between the heat exchanger (15) and the second m tension valve (5) is connected to the outlet side of the heat exchanger (14) to lower the temperature of the temperature sensing part. The evaporation pressure regulating valve is controlled so that the valve is throttled and opened when the temperature rises, and the outlet side is connected to the suction side of the second compressor (11). (16) is a second check valve connected to a pipe connecting the outlet side of the first evaporator (6) and the suction side of the second compressor (If) and allowing flow in the suction direction; (I7) is a throttle valve connected between the gas phase part (4b) of the gas-liquid separator (4) and the suction side of the second compressor (11). These (11) to 15) are sequentially connected to each other with the condenser (2), expansion valve (3), and gas-liquid separator (a) that constitute the main refrigerant circuit C1 in common, and constitute the sub-refrigerant circuit C2. ing.
次に上記のように構成された従来の冷凍装置の作用を説
明する。Next, the operation of the conventional refrigeration system configured as described above will be explained.
第５図のモリエル線図におけるサイクル線図上の符号は
第４図において同符号を付した個所に対応しているもの
とする。まず、第４図において、副冷媒回路Ｃ２を伴な
わない場合の主冷媒回路Ｃ８をサイクル線図て示すと、
第５図のように１ａ→２ａ→３ｂ→３ａ→（弁１７や熱
交換器（１４）が無いものとして図示破線を経由して）
→５ａ′→６ａ→１ａとなる。次に副冷媒回路Ｃ２を伴
なった場合の主冷媒回路Ｃ１をサイクル線図で示すと、
第５図のように１ａ→２ａ→３ｂ→３ａ→２９→（熱交
換器１４による５ｂの冷却により）→５ｂ→５ａ→６ａ
→１ａとなる。It is assumed that the symbols on the cycle diagram in the Mollier diagram of FIG. 5 correspond to the parts with the same symbols in FIG. First, in FIG. 4, the main refrigerant circuit C8 without the auxiliary refrigerant circuit C2 is shown as a cycle diagram.
As shown in Fig. 5, 1a → 2a → 3b → 3a → (via the broken line shown, assuming that there is no valve 17 or heat exchanger (14))
→5a'→6a→1a. Next, the main refrigerant circuit C1 when accompanied by the sub-refrigerant circuit C2 is shown in a cycle diagram.
As shown in Fig. 5, 1a → 2a → 3b → 3a → 29 → (by cooling 5b by heat exchanger 14) → 5b → 5a → 6a
→ becomes 1a.
つまり、副冷媒回路Ｃ２を主冷媒回路Ｃ□に付属させる
ことで、主冷媒回路Ｃ１のサブクールを第５図中３ａ→
５ｂまで増加させることができ、省エネルギー化が実現
される。In other words, by attaching the sub-refrigerant circuit C2 to the main refrigerant circuit C□, the sub-cooling of the main refrigerant circuit C1 can be changed from 3a in Fig. 5 to
It can be increased up to 5b, realizing energy saving.
従来の冷凍装置は以上のように構成されているので、省
エネルギー化を図るためには例えば第２圧縮機、第２蒸
発器、第２膨張弁など必要部品が多くなり、部品のコス
トアップならびに収納スペースか大きくなると言う問題
点があった。Conventional refrigeration equipment is configured as described above, so in order to save energy, many parts are required, such as the second compressor, second evaporator, and second expansion valve, which increases the cost of parts and requires storage. The problem was that it would take up a lot of space.
この発明は上記のような問題点を解消するためになされ
たもので、少ない部品点数で省エネルギー化が可能な冷
凍装置を得ることを目的としてぃ（４）
る。This invention was made to solve the above-mentioned problems, and its purpose is to provide a refrigeration system that can save energy with a small number of parts (4).
この発明に係る冷凍装置は、凝縮器で凝縮された冷媒液
を回転式圧縮機の圧縮過程へ導くバイパス回路を設け、
このバイパス回路には絞り装置及びこの絞り装置で絞ら
れた冷媒液と凝縮器と絞り弁との間の冷媒液とを熱交換
する熱交換器を設けたものである。The refrigeration system according to the present invention includes a bypass circuit that guides the refrigerant liquid condensed in the condenser to the compression process of the rotary compressor,
This bypass circuit is provided with a throttle device and a heat exchanger for exchanging heat between the refrigerant liquid squeezed by the throttle device and the refrigerant liquid between the condenser and the throttle valve.
この発明に係る冷凍装置の熱交換器は、絞り弁へ流入す
る冷媒液の過冷却度を増加させエンタルピの増加をもた
らす。The heat exchanger for a refrigeration system according to the present invention increases the degree of subcooling of the refrigerant liquid flowing into the throttle valve, resulting in an increase in enthalpy.
以下、この発明の一実施例における冷凍装置を図に基づ
いて説明する。第１図において、回転式圧縮機（１）、
凝縮器（２）、絞り弁（３）および蒸発器（６）は従来
装置におけるものと同様である。（７）は凝縮器（２）
の出口側に接続され、冷媒を回転式圧縮機（１）の圧縮
過程へ導くバイパス回路、（８）はこのバイパス回路（
７）に設けられた絞り装置、（９）はこの絞り装置（８
）の出口側に設けられた熱交換器で、絞り装置（８）か
ら吐出された冷媒液と凝縮器（２）、絞り弁（３）間の
冷媒液とを熱交換する。DESCRIPTION OF THE PREFERRED EMBODIMENTS A refrigeration system according to an embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, a rotary compressor (1),
The condenser (2), throttle valve (3) and evaporator (6) are similar to those in conventional devices. (7) is the condenser (2)
A bypass circuit (8) is connected to the outlet side of the rotary compressor (1) and leads the refrigerant to the compression process of the rotary compressor (1).
7) is the diaphragm device installed, and (9) is this diaphragm device (8).
) is used to exchange heat between the refrigerant liquid discharged from the throttle device (8) and the refrigerant liquid between the condenser (2) and the throttle valve (3).
次に、上記のように構成されたこの発明の一実施例にお
ける冷凍装置の作用を説明する。Next, the operation of the refrigeration system in one embodiment of the present invention configured as described above will be explained.
第２図のモリエル線図におけるサイクル線図上の符号は
第１図において同符号を付した個所に対応しているもの
とする。まず、第３図に示すように凝縮器（２）から導
出された冷媒を、熱交換することなくバイパス回路（７
）を経て回転式圧縮機（１）ヘバイパスすると言うすで
に公知の冷凍回路の場合をサイクル線図で示すと、第２
図のように１ａ→３ｄ→３ａ′→６ａ→１ａとなり過冷
却はほとんど増加することなく、絞り弁（３）で絞られ
るためエンタルピは１６ａ、１３ｄとなり成績係数の改
善、すなわち、省エネルギー化には寄与しない。It is assumed that the symbols on the cycle diagram in the Mollier diagram of FIG. 2 correspond to the parts given the same symbols in FIG. First, as shown in Fig. 3, the refrigerant drawn out from the condenser (2) is transferred to the bypass circuit (7) without heat exchange.
) to the rotary compressor (1) is shown in a cycle diagram.
As shown in the figure, the order changes from 1a → 3d → 3a' → 6a → 1a, and the supercooling hardly increases, and since it is throttled by the throttle valve (3), the enthalpy becomes 16a, 13d, which is effective for improving the coefficient of performance, that is, for energy saving. Does not contribute.
そこで、第１図に示す冷凍回路のように、絞り装置（８
）から吐出された冷媒液と凝縮器（２）、絞り弁（３）
間の冷媒液とを熱交換装置（９）により熱交換する場合
をサイクル線図で示すと、第２図のように１ ａ→３
ｂ−＋３ ａ−＋６ ａ−＋ １ ａとなり、絞り弁（
３）の入口側の過冷却度は第２図に示すように３ｄから
３ｂまで増加し、エンタルピの増加は１３ｄ１３ｂとな
り、省エネルギー化か達成される。なお、回転式圧縮機
（１）の吸込量は、バイパス回路（７）からのバイパス
量か変化しても、圧縮機固有の吸込量が決まっているた
め、蒸発器（６）への冷媒循環量は一定である。Therefore, as in the refrigeration circuit shown in Fig. 1, a throttling device (8
), the refrigerant liquid discharged from the condenser (2), and the throttle valve (3)
A cycle diagram showing the case where the heat exchange device (9) exchanges heat with the refrigerant liquid between 1 a and 3 as shown in Figure 2
b-+3 a-+6 a-+ 1 a, and the throttle valve (
In 3), the degree of supercooling on the inlet side increases from 3d to 3b as shown in FIG. 2, and the enthalpy increases to 13d13b, achieving energy saving. Note that even if the suction amount of the rotary compressor (1) changes from the bypass amount from the bypass circuit (7), the suction amount specific to the compressor is fixed, so the refrigerant circulation to the evaporator (6) is The amount is constant.
以上のように、この発明によれは凝縮器で凝縮された冷
媒液を回転式圧縮器の圧縮過程へ導くバイパス回路を設
け、このバイパス回路には絞り装置及びこの絞り装置で
絞られた冷媒液と凝縮器、絞り弁間の冷媒液とを熱交換
する熱交換器を設けたので、絞り弁入口側の過冷却度を
増加させることができ、少ない部品点数で省エネルギー
化が可能な冷凍装置を得ることができる。As described above, according to the present invention, a bypass circuit is provided which guides the refrigerant liquid condensed in the condenser to the compression process of the rotary compressor, and this bypass circuit includes a throttle device and the refrigerant liquid squeezed by the throttle device. By installing a heat exchanger that exchanges heat between the refrigerant liquid between the condenser, the condenser, and the throttle valve, it is possible to increase the degree of subcooling on the throttle valve inlet side, creating a refrigeration system that can save energy with a small number of parts. Obtainable.
第１図はこの発明の一実施例における冷凍装置の構成を
示す冷媒回路図、第２図は第１図における冷凍装置の冷
凍サイクルのモリエル線図、第３図は凝縮器から導出さ
れた冷媒を圧縮機ヘバイパスするようになされた一般の
冷凍装置の構成を示す冷媒回路図、第４図は従来の冷凍
装置の構成を示す冷媒回路図、第５図は第４図における
冷凍装置の冷凍サイクルのモリエル線図である。
図において、（１）は回転式圧ｍ機、（２１は凝縮器、
（３）は絞り弁、（６）は蒸発器、（７）はバイパス回
路、（８）は絞り装置、（９）は熱交換器である、なお
、各図中、同一符号は同一または相当部分を示す。Fig. 1 is a refrigerant circuit diagram showing the configuration of a refrigeration system in an embodiment of the present invention, Fig. 2 is a Mollier diagram of the refrigeration cycle of the refrigeration system in Fig. 1, and Fig. 3 is a refrigerant drawn out from a condenser. FIG. 4 is a refrigerant circuit diagram showing the configuration of a conventional refrigeration system, and FIG. 5 is a refrigeration cycle of the refrigeration system shown in FIG. 4. It is a Mollier diagram of . In the figure, (1) is a rotary pressure machine, (21 is a condenser,
(3) is a throttle valve, (6) is an evaporator, (7) is a bypass circuit, (8) is a throttle device, and (9) is a heat exchanger. In each figure, the same symbols are the same or correspond to each other. Show parts.
Claims (1)
続して構成される冷凍装置において、上記凝縮器で凝縮
された冷媒液を上記回転式圧縮機の圧縮過程へ導くバイ
パス回路を設け、上記バイパス回路には絞り装置及び、
この絞り装置で絞られた上記冷媒液と、上記凝縮器と上
記絞り弁との間の冷媒液とを熱交換する熱交換器を設け
たことを特徴とする冷凍装置。In a refrigeration system configured by sequentially connecting a rotary compressor, a condenser, a throttle valve, and an evaporator, a bypass circuit is provided for guiding refrigerant liquid condensed in the condenser to the compression process of the rotary compressor, The bypass circuit includes a throttle device and
A refrigeration system comprising a heat exchanger for exchanging heat between the refrigerant liquid squeezed by the throttle device and the refrigerant liquid between the condenser and the throttle valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9670890A JPH03294750A (en) | 1990-04-11 | 1990-04-11 | Freezing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9670890A JPH03294750A (en) | 1990-04-11 | 1990-04-11 | Freezing apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03294750A true JPH03294750A (en) | 1991-12-25 |
Family
ID=14172251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9670890A Pending JPH03294750A (en) | 1990-04-11 | 1990-04-11 | Freezing apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03294750A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6293123B1 (en) | 1999-07-30 | 2001-09-25 | Denso Corporation | Refrigeration cycle device |
| US6347528B1 (en) | 1999-07-26 | 2002-02-19 | Denso Corporation | Refrigeration-cycle device |
| USRE43805E1 (en) | 2004-10-18 | 2012-11-20 | Mitsubishi Electric Corporation | Refrigeration/air conditioning equipment |
| US8899058B2 (en) | 2006-03-27 | 2014-12-02 | Mitsubishi Electric Corporation | Air conditioner heat pump with injection circuit and automatic control thereof |
| JPWO2021084743A1 (en) * | 2019-11-01 | 2021-05-06 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5625643A (en) * | 1979-08-08 | 1981-03-12 | Hitachi Ltd | Refrigerating cycle |
| JPS5837457A (en) * | 1981-08-29 | 1983-03-04 | 富士電機株式会社 | Refrigerant circuit for refrigerator |
-
1990
- 1990-04-11 JP JP9670890A patent/JPH03294750A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5625643A (en) * | 1979-08-08 | 1981-03-12 | Hitachi Ltd | Refrigerating cycle |
| JPS5837457A (en) * | 1981-08-29 | 1983-03-04 | 富士電機株式会社 | Refrigerant circuit for refrigerator |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6347528B1 (en) | 1999-07-26 | 2002-02-19 | Denso Corporation | Refrigeration-cycle device |
| US6293123B1 (en) | 1999-07-30 | 2001-09-25 | Denso Corporation | Refrigeration cycle device |
| USRE43805E1 (en) | 2004-10-18 | 2012-11-20 | Mitsubishi Electric Corporation | Refrigeration/air conditioning equipment |
| USRE43998E1 (en) | 2004-10-18 | 2013-02-19 | Mitsubishi Electric Corporation | Refrigeration/air conditioning equipment |
| US8899058B2 (en) | 2006-03-27 | 2014-12-02 | Mitsubishi Electric Corporation | Air conditioner heat pump with injection circuit and automatic control thereof |
| JPWO2021084743A1 (en) * | 2019-11-01 | 2021-05-06 | ||
| WO2021084743A1 (en) * | 2019-11-01 | 2021-05-06 | 三菱電機株式会社 | Refrigeration cycle device |
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