JPH0275860A - Method and apparatus for preventing compressed refrigerant gas of refrigerating compressor from abnormally overheating - Google Patents
Method and apparatus for preventing compressed refrigerant gas of refrigerating compressor from abnormally overheatingInfo
- Publication number
- JPH0275860A JPH0275860A JP22706988A JP22706988A JPH0275860A JP H0275860 A JPH0275860 A JP H0275860A JP 22706988 A JP22706988 A JP 22706988A JP 22706988 A JP22706988 A JP 22706988A JP H0275860 A JPH0275860 A JP H0275860A
- Authority
- JP
- Japan
- Prior art keywords
- evaporator
- heat transfer
- refrigerant gas
- compressor
- refrigerant
- 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
- 239000003507 refrigerant Substances 0.000 title claims abstract description 109
- 238000013021 overheating Methods 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims description 6
- 230000003247 decreasing effect Effects 0.000 claims abstract description 7
- 238000005057 refrigeration Methods 0.000 claims description 37
- 230000002159 abnormal effect Effects 0.000 claims description 9
- 238000001704 evaporation Methods 0.000 claims description 5
- 230000008020 evaporation Effects 0.000 claims description 5
- 238000009833 condensation Methods 0.000 claims description 3
- 230000005494 condensation Effects 0.000 claims description 3
- 230000002265 prevention Effects 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 18
- 230000000694 effects Effects 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000009834 vaporization Methods 0.000 description 3
- 230000008016 vaporization Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- PZZOEXPDTYIBPI-UHFFFAOYSA-N 2-[[2-(4-hydroxyphenyl)ethylamino]methyl]-3,4-dihydro-2H-naphthalen-1-one Chemical compound C1=CC(O)=CC=C1CCNCC1C(=O)C2=CC=CC=C2CC1 PZZOEXPDTYIBPI-UHFFFAOYSA-N 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000012530 fluid Substances 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
- F25B2600/00—Control issues
- F25B2600/21—Refrigerant outlet evaporator temperature
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野〕
本発明は通常の冷凍装置又は二元冷凍装置における低温
側の蒸発器の処理熱量に関係なく、また蒸発器出口の冷
媒圧力を変化させることなく冷媒ガスの過熱度を抑制し
、かつ冷凍能力を維持したまま圧縮機での圧縮冷媒ガス
の過熱を防止する冷凍圧縮機の圧縮冷媒ガス異常過熱防
止方法並びにその装置に関するものである。Detailed Description of the Invention (Industrial Field of Application) The present invention is applicable to a normal refrigeration system or a dual refrigeration system, regardless of the amount of heat processed by the evaporator on the low temperature side, and by changing the refrigerant pressure at the outlet of the evaporator. The present invention relates to a method and apparatus for preventing abnormal overheating of compressed refrigerant gas in a refrigeration compressor, which suppresses the degree of superheating of refrigerant gas and prevents overheating of compressed refrigerant gas in the compressor while maintaining refrigeration capacity.
従来、この種冷凍装置における冷凍圧縮機の圧縮冷媒ガ
スの過熱を防止する方法および装置には、圧縮機吸入管
内の過熱吸入ガス中に凝縮器で凝縮した冷媒液を噴射弁
により供給し、該冷媒液の気化熱を利用して過熱冷媒ガ
スを冷却し、該冷媒ガスを圧縮機で圧縮するようにし、
圧縮冷媒ガスの過熱を防止するもの等がある。Conventionally, a method and a device for preventing overheating of compressed refrigerant gas in a refrigeration compressor in this type of refrigeration equipment include supplying refrigerant liquid condensed in a condenser to superheated suction gas in a compressor suction pipe through an injection valve; Cooling the superheated refrigerant gas using the heat of vaporization of the refrigerant liquid, and compressing the refrigerant gas with a compressor,
There are devices that prevent overheating of compressed refrigerant gas.
従来の冷凍圧縮機の吸入管内に、凝縮器で凝縮した冷媒
液を噴射弁により供給するものでは、該冷媒液の気化熱
によって吸入管内の過熱冷媒吸入ガスを冷却し、該冷却
された冷媒ガスを圧縮機に吸入するから、圧縮機より吐
出される圧縮冷媒ガスは過熱が防止された状態となるが
、凝縮器よりの冷媒液を冷凍圧縮機に分流するため、膨
張弁および蒸発器を通過する冷媒の循環量が減少し、目
的とする被冷却流体を冷却することには寄与せず、それ
だけ蒸発器の処理熱量を低下させるという欠点がある。In a conventional refrigeration compressor in which refrigerant liquid condensed in a condenser is supplied into the suction pipe by an injection valve, superheated refrigerant suction gas in the suction pipe is cooled by the heat of vaporization of the refrigerant liquid, and the cooled refrigerant gas is Since the compressed refrigerant gas is sucked into the compressor, the compressed refrigerant gas discharged from the compressor is prevented from overheating, but in order to divert the refrigerant liquid from the condenser to the refrigeration compressor, it passes through an expansion valve and an evaporator. This has the drawback that the circulating amount of refrigerant decreases, does not contribute to cooling the intended fluid to be cooled, and reduces the amount of heat processed by the evaporator.
また、蒸発器出口の冷媒ガスの過熱度が大きく、圧縮機
の圧縮冷媒ガスが異常に過熱する場合には、蒸発器出口
の冷媒ガスの過熱度を小さくするために、蒸発器内を循
環する冷媒流量を多くする必要があり、そのために蒸発
器内の冷媒蒸発圧力が上昇し、圧縮機の過負荷運転を引
き起こす欠点がある。In addition, if the degree of superheating of the refrigerant gas at the evaporator outlet is large and the compressed refrigerant gas of the compressor is abnormally overheated, in order to reduce the degree of superheating of the refrigerant gas at the evaporator outlet, circulation is performed within the evaporator. It is necessary to increase the refrigerant flow rate, which increases the refrigerant evaporation pressure in the evaporator, which has the drawback of causing overload operation of the compressor.
更に該過負荷運転を防止するために、蒸発器内の冷媒循
環量を少なくすると、蒸発器出口の冷媒ガスは過熱度が
大きくなり、圧縮機では該過熱度の大きい冷媒ガスを吸
入して圧縮することになるから、圧縮冷媒ガスが過熱し
、圧縮機の圧縮冷媒ガスが極度の過熱状態になると、圧
縮機中の潤滑油が高温となり、種々の機械的悪影響を与
えるだけでなく、圧縮機の軸動力が上昇し、エネルギー
ロスを引き起こしたりする欠点がある。Furthermore, in order to prevent overload operation, if the amount of refrigerant circulated in the evaporator is reduced, the degree of superheat of the refrigerant gas at the outlet of the evaporator increases, and the compressor takes in and compresses the highly superheated refrigerant gas. If the compressed refrigerant gas in the compressor becomes extremely overheated, the lubricating oil in the compressor becomes high temperature, which not only causes various adverse mechanical effects, but also damages the compressor. The disadvantage is that the shaft power increases, causing energy loss.
本発明は以上の欠点を除去した、冷凍装置における蒸発
器の処理熱量に関係なく、また、蒸発器出口の冷媒圧力
を変化させることなく冷媒ガスの過熱度を抑え、冷凍能
力を維持しながら、冷凍圧縮機の圧縮冷媒ガスの異常過
熱を防止する方法並びにその装置を提供することを目的
とする。The present invention eliminates the above drawbacks, suppresses the degree of superheating of refrigerant gas regardless of the amount of heat processed by the evaporator in the refrigeration system, and without changing the refrigerant pressure at the outlet of the evaporator, and maintains the refrigerating capacity. It is an object of the present invention to provide a method and device for preventing abnormal overheating of compressed refrigerant gas in a refrigeration compressor.
圧縮機で圧縮した冷媒ガスを凝縮器で液化し、膨張弁で
減圧して蒸発器で蒸発した冷媒ガスを再び圧縮機に戻す
ようにそれぞれの機器を管路で連結して該各機器で圧縮
、凝縮、膨張および蒸発の各作用を行う通常の冷凍装置
の蒸発器又は二元冷凍装置の低温側蒸発器において、そ
れぞれの蒸発器の伝熱管を複数の回路に分割し、膨張弁
出口に分流器を連結し、該分流器の各分岐管に自動弁を
介して前記複数の回路に分割した伝熱管とそれぞれ連結
し、各分岐管の自動弁により複数の回路に分割した伝熱
管の管路の何れかを閉塞するようにしたものである。The refrigerant gas compressed by the compressor is liquefied by the condenser, the pressure is reduced by the expansion valve, and the refrigerant gas evaporated by the evaporator is returned to the compressor. Each device is connected by a pipe and compressed by each device. In the evaporator of a normal refrigeration system or the low-temperature side evaporator of a binary refrigeration system that performs the functions of condensation, expansion, and evaporation, the heat transfer tubes of each evaporator are divided into multiple circuits, and the flow is divided to the outlet of the expansion valve. the heat exchanger tubes are connected to the heat exchanger tubes divided into the plurality of circuits through automatic valves to each branch pipe of the flow divider, and the heat exchanger tubes are divided into the plurality of circuits by the automatic valve of each branch pipe. It is designed to block one of the following.
膨張弁７出ロ連結した分流器８の各分岐管８ａに介在し
た自動弁１０により複数の回路２ａに分割した伝熱管２
の何れかを閉塞するから、全数の自動弁１０を開状態と
したり、一部の自動弁１０を閉状態等にすることができ
、伝熱管２の流路断面積の増減が可能となり、蒸発器１
の全伝熱面積を広くしたり、狭くしたりすることができ
る。Heat exchanger tube 2 divided into a plurality of circuits 2a by automatic valve 10 interposed in each branch pipe 8a of flow divider 8 connected to expansion valve 7 output.
Since one of the automatic valves 10 is closed, all the automatic valves 10 can be opened, some automatic valves 10 can be closed, etc., and the cross-sectional area of the heat transfer tube 2 can be increased or decreased. Vessel 1
The total heat transfer area can be increased or decreased.
これにより同一冷媒循環量下において、蒸発器１の伝熱
管２出口での冷媒ガスの過熱度が大きくなる現象が生し
た場合には、蒸発器１の全伝熱面積を狭くするように自
動弁ＩＯの開閉状態を変更するごとによって、実効伝熱
面積が維持され、該出口における冷媒ガスの過熱度を小
さくし、圧縮機は該過熱度の小さい冷媒ガスを吸入する
ことによって圧縮冷媒ガスの異常過熱を防止することが
できるものである。As a result, if the degree of superheating of the refrigerant gas at the outlet of the heat transfer tube 2 of the evaporator 1 increases under the same amount of refrigerant circulation, an automatic valve is activated to narrow the total heat transfer area of the evaporator 1. By changing the opening/closing state of the IO, the effective heat transfer area is maintained, the degree of superheat of the refrigerant gas at the outlet is reduced, and the compressor takes in refrigerant gas with a small degree of superheat, thereby preventing abnormalities in the compressed refrigerant gas. It can prevent overheating.
第２図は蒸発器１の伝熱管２の全断面積における冷媒の
気液の状態を示す図示で、これを用いて蒸発器１の全伝
熱面積を縮小し、実効伝熱面積を維持することにより圧
縮冷媒ガスの異常過熱が防止可能なことを説明する。Ａ
は複数の回路２ａに分割した伝熱管２の全断面積に対し
分流器８の各分岐管８ａに介在した自動弁１０を全開と
して冷媒を供給する状態を示し、従来の冷凍装置と同様
のもので、伝熱管２の全断面積に対して冷媒を供給する
状態を表し、伝熱管冷媒入口から伝熱管有効長までの右
下がりの直線は冷媒の気液分離線であり、該伝熱管有効
長までの伝熱有効部分は実効伝熱面積に相当する部分で
あり、こごで冷媒液は１００％冷媒ガスとして蒸発する
。該伝熱有効部分は冷媒液が逐次冷媒ガスとなる冷媒気
液存在部分で、一定温度で冷却する冷却作用を有するが
、伝熱管の全長から伝熱管有効部分を差し引いた残りの
部分は冷却作用が殆どなく、逐次冷媒ガスを過熱する冷
媒ガス過熱部分となり、図示のようにかなり大きな部分
を占める。Ｂは複数の回路２ａに分割した伝熱管２に、
分流器８の各分岐管８ａに介在した自動弁１０の一部を
閉として伝熱管２の全断面積に対して該自動弁ＩＯの一
部を閉とした部分を除き冷媒を供給する状態を示し、本
発明の場合のもので、前記Ａと冷媒流量を同一とし、伝
熱管入口から自動弁１０の一部を閉とした複数の回路２
ａの伝熱管断面積を伝熱無効断面積とし、該部分を伝熱
管全断面積より差し引いた部分を伝熱管有効断面積とし
、前記同様の気液分離線を描いて冷媒気液存在部分（伝
熱有効部分）即ち実効伝熱面積に相当する部分を画した
もので、該伝熱管全長より伝熱有効部分を差し引いた図
示のような小さな部分が冷媒ガス過熱部分となり、従来
のものと比較して冷媒ガス過熱部分が僅少または皆無と
なり、それだけ冷凍圧縮機５の吸入管５ａに供給される
蒸発器１の伝熱管２出口からの冷媒ガスの過熱度が抑制
されることになり、冷凍圧縮機５での異常過熱が防止で
きるものである。FIG. 2 is a diagram showing the gas-liquid state of the refrigerant in the entire cross-sectional area of the heat transfer tubes 2 of the evaporator 1. This is used to reduce the total heat transfer area of the evaporator 1 and maintain the effective heat transfer area. This will explain how abnormal overheating of the compressed refrigerant gas can be prevented. A
1 shows a state in which refrigerant is supplied by fully opening the automatic valve 10 interposed in each branch pipe 8a of the flow divider 8 to the entire cross-sectional area of the heat transfer tube 2 divided into a plurality of circuits 2a, which is similar to a conventional refrigeration system. represents the state in which the refrigerant is supplied to the entire cross-sectional area of the heat exchanger tube 2, and the straight line downward to the right from the refrigerant inlet of the heat exchanger tube to the effective length of the heat exchanger tube is the gas-liquid separation line of the refrigerant, and the effective length of the heat exchanger tube is The effective heat transfer area up to this point corresponds to the effective heat transfer area, and the refrigerant liquid evaporates as 100% refrigerant gas at this point. The heat transfer effective portion is the refrigerant vapor/liquid existing portion where the refrigerant liquid gradually becomes refrigerant gas, and has a cooling effect of cooling at a constant temperature, but the remaining portion after subtracting the heat transfer tube effective portion from the total length of the heat transfer tube has a cooling effect. The refrigerant gas overheating portion gradually overheats the refrigerant gas, and occupies a fairly large portion as shown in the figure. B is a heat exchanger tube 2 divided into a plurality of circuits 2a,
A state is established in which a part of the automatic valve 10 interposed in each branch pipe 8a of the flow divider 8 is closed, and refrigerant is supplied to the entire cross-sectional area of the heat transfer tube 2, except for the part where the automatic valve IO is partially closed. This is the case of the present invention, in which the refrigerant flow rate is the same as that of A, and a plurality of circuits 2 with a part of the automatic valve 10 closed from the heat transfer tube inlet
The cross-sectional area of the heat exchanger tube in a is taken as the heat transfer ineffective cross-sectional area, and the part subtracted from the total cross-sectional area of the heat exchanger tube is taken as the effective cross-sectional area of the heat exchanger tube, and the same gas-liquid separation line as above is drawn to determine the refrigerant gas-liquid present area ( The effective heat transfer area), that is, the area corresponding to the effective heat transfer area, is delineated.The small area shown in the figure, which is obtained by subtracting the effective heat transfer area from the total length of the heat transfer tube, becomes the refrigerant gas overheating area, and compared to the conventional one. As a result, the superheated portion of the refrigerant gas becomes slight or non-existent, and the degree of superheating of the refrigerant gas from the outlet of the heat transfer tube 2 of the evaporator 1, which is supplied to the suction pipe 5a of the refrigeration compressor 5, is suppressed accordingly. This can prevent abnormal overheating in the machine 5.
〔実施例］
今、ここに本発明実施の一例を示した添付図面について
詳説する。[Example] The accompanying drawings showing an example of carrying out the present invention will now be described in detail.
１は通常の冷凍装置又は二元冷凍装置における低温側の
蒸発器で、ヘアーピン状に多段かつ多列に配置した伝熱
管２より成り、２ａは該伝熱管２を複数に分割したその
個々の回路である。Reference numeral 1 denotes a low-temperature side evaporator in a normal refrigeration system or a binary refrigeration system, which consists of heat exchanger tubes 2 arranged in multiple stages and in multiple rows in the shape of hairpins, and 2a represents individual circuits in which the heat exchanger tubes 2 are divided into a plurality of parts. It is.
３は該個々の回路２ａの伝熱管冷媒入口で、４は同伝熱
管冷媒出口である。５は冷凍圧縮機で、６は該圧縮機５
の吐出管５ｂと入口管６ａとを連結した凝縮器であり、
通常の冷凍装置においでは冷凍圧縮機５よりの圧縮冷媒
ガスを冷却して該冷媒ガスを凝縮するもので、二元冷凍
装置においては高温側の蒸発器となり、該凝縮器６内の
伝熱管外に高温側冷媒を流し、高温側冷媒が蒸発する気
化熱を凝縮器６内の伝熱管内を通過する冷凍圧縮機５よ
りの圧縮冷媒ガスから奪い、圧縮冷媒ガスを凝縮するも
のである。７は −膨張弁で、該凝縮器６の出
口管６ｂに介在したもので、該圧縮機５で圧縮されて凝
縮器６で液化した高圧冷媒液を減圧し、低圧の冷媒液と
一部の冷媒ガスとなるものである。８は分流器で、膨張
弁７の出口に連結したもので、該膨張弁７よりの低圧の
主として冷媒液を、前記複数回路に分割した個々の回路
２ａの伝熱管冷媒人口３と該分流器８の各分岐管８ａと
を連結し、該各分岐管８ａを介して個々の回路２ａに分
流するものである。９は前記各伝熱管冷媒出口４と連結
したヘッダーで、該−・ラダー９の集合管９ａを冷凍圧
縮機５の吸入管５ａに連結したものである。ｌＯは分流
器８の各分岐管８ａに介在した電磁弁等より成る自動弁
で、それぞれの自動弁１０とヘッダー９の集合管９ａに
設備した温度検出器１１と結線し、ヘッダー９の集合管
９ａでの医発器ｌの出口よりの冷媒ガスの過熱度を温度
検出器１１により感知して各自動弁１０を操作し、全数
の自動弁１０を開状態にしたり、一部の自動弁１０を閉
状態にする等、伝熱管２の流路断面積を増減するよう装
置したものである。3 is a heat exchanger tube refrigerant inlet of each circuit 2a, and 4 is a heat exchanger tube refrigerant outlet. 5 is a refrigeration compressor; 6 is the compressor 5;
It is a condenser in which a discharge pipe 5b and an inlet pipe 6a are connected,
In a normal refrigeration system, the compressed refrigerant gas from the refrigeration compressor 5 is cooled and the refrigerant gas is condensed. The high-temperature refrigerant is passed through the refrigerant, and the heat of vaporization of the high-temperature refrigerant is taken away from the compressed refrigerant gas from the refrigeration compressor 5 passing through the heat transfer tube in the condenser 6, thereby condensing the compressed refrigerant gas. 7 is an expansion valve, which is interposed in the outlet pipe 6b of the condenser 6, and reduces the pressure of the high-pressure refrigerant liquid compressed by the compressor 5 and liquefied in the condenser 6, and combines it with the low-pressure refrigerant liquid and a part of it. It becomes refrigerant gas. Reference numeral 8 denotes a flow divider, which is connected to the outlet of the expansion valve 7, and connects the low-pressure mainly refrigerant liquid from the expansion valve 7 to the heat transfer tube refrigerant population 3 of each circuit 2a divided into the plurality of circuits and the flow divider. 8 branch pipes 8a are connected to each other, and the flow is divided into individual circuits 2a via the respective branch pipes 8a. Reference numeral 9 denotes a header connected to each heat transfer tube refrigerant outlet 4, and connects the collecting pipe 9a of the ladder 9 to the suction pipe 5a of the refrigeration compressor 5. IO is an automatic valve consisting of a solenoid valve etc. interposed in each branch pipe 8a of the flow divider 8, and each automatic valve 10 is connected to a temperature sensor 11 installed in the collecting pipe 9a of the header 9, and The degree of superheating of the refrigerant gas from the outlet of the medical generator 1 at 9a is detected by the temperature detector 11 and each automatic valve 10 is operated to open all the automatic valves 10 or open some of the automatic valves 10. This device is designed to increase or decrease the flow passage cross-sectional area of the heat transfer tube 2, such as by closing the heat transfer tube 2.
〔発明の効果）
通常の冷凍装置又は二元冷凍装置の低温側の蒸発器１に
本発明装置を設備すると、従来のように凝縮器６で凝縮
した冷媒液を噴射弁により冷凍圧縮機５の吸入管５ａ内
の過熱冷媒ガス中に供給するごとがないので、膨張弁７
及び蒸発器ｌを通過する冷媒の循環量には変動がなく、
−定となり、蒸発器１の処理熱量を低下させることがな
い。[Effect of the invention] When the device of the present invention is installed in the evaporator 1 on the low temperature side of a normal refrigeration device or a binary refrigeration device, the refrigerant liquid condensed in the condenser 6 is injected into the refrigeration compressor 5 using an injection valve as in the conventional method. Since there is no need to supply superheated refrigerant gas in the suction pipe 5a, the expansion valve 7
and there is no fluctuation in the amount of refrigerant circulating through the evaporator l,
- constant, and the amount of heat processed by the evaporator 1 does not decrease.
また伝熱管冷媒出口４の冷媒ガス過熱度が太きい場合に
は、前記のように蒸発器１を通過する冷媒の循環量は一
定であり、ヘッダー９の集合管９ａで蒸発器ｌ出口（伝
熱管冷媒出口４）の冷媒ガスの過熱度を温度検出器１１
で感知して。Furthermore, when the refrigerant gas superheat degree at the heat exchanger tube refrigerant outlet 4 is large, the amount of refrigerant circulating through the evaporator 1 is constant as described above, and the evaporator l outlet (transfer A temperature detector 11 detects the degree of superheating of the refrigerant gas at the heat tube refrigerant outlet 4).
Sense it with.
各分岐管８ａに介在した自動弁１０の一部を閉状態にし
、蒸発器１の伝熱管流路断面積を減少し、反対に伝熱管
冷媒出口４の冷媒ガス過熱度が小さい場合には温度検出
器１１により各分岐管８ａに介在した自動弁１０の全て
を開状態とし、伝熱管流路断面積を増加するから、何れ
の場合も実効伝熱面積が維持され、蒸発器１内の冷媒蒸
発圧力を変化させることなく、蒸発器冷媒出口４の冷媒
ガスの過熱度が減少する。これにより冷凍圧縮機５が過
負荷運転を起こすことがないと共に、蒸発器ｌ出口での
冷媒ガスの過熱度を抑制し、該冷媒ガスを吸入する冷凍
圧縮機５の圧縮冷媒ガスの異常過熱が防止でき、冷凍圧
縮機５中の潤滑油が高温となることもなく、種々の機械
的悪影響も受けず、冷凍圧縮機５の軸動力が上昇しない
から、エネルギーロスを引き起こしたりすること等もな
く、省エネルギー化が可能となる。A part of the automatic valve 10 interposed in each branch pipe 8a is closed, and the cross-sectional area of the heat transfer tube flow path of the evaporator 1 is reduced. Since all the automatic valves 10 interposed in each branch pipe 8a are opened by the detector 11 and the cross-sectional area of the heat transfer tube flow path is increased, the effective heat transfer area is maintained in any case, and the refrigerant in the evaporator 1 is The degree of superheat of the refrigerant gas at the evaporator refrigerant outlet 4 is reduced without changing the evaporation pressure. This prevents overload operation of the refrigeration compressor 5, suppresses the degree of superheating of the refrigerant gas at the evaporator l outlet, and prevents abnormal overheating of the compressed refrigerant gas of the refrigeration compressor 5 that sucks the refrigerant gas. This can be prevented, the lubricating oil in the refrigeration compressor 5 does not become high temperature, it is not affected by various mechanical adverse effects, and the shaft power of the refrigeration compressor 5 does not increase, so there is no energy loss. , it becomes possible to save energy.
添付図面は本発明実施の一例を示したもので、第１図は
本発明装置の概略配管図、第２図は冷媒の蒸発器伝熱管
内における気液の状態を示す図表で、Ａは自動弁を全開
訣態のもの、Ｂは自動弁を一部閉状態としたものである
。
１−・・蒸発器、２・・−伝熱管、２ａ−・分割した回
路、３−・−伝熱管冷媒入口、４−伝熱管冷媒出口、５
−・冷凍圧縮機、５ａ−吸入管、５ｂ−吐出管、６・・
−凝縮器、６ａ−人口管、６ｂ−出口管、７−・膨張弁
、８−分流器、８ａ−・・分岐管、９−ヘッダー、９ａ
−集合管、１０−・自動弁、１１・−温度検出器。The attached drawings show an example of the implementation of the present invention. Figure 1 is a schematic piping diagram of the apparatus of the present invention, Figure 2 is a diagram showing the state of gas and liquid in the refrigerant evaporator heat transfer tube, and A is an automatic B shows the valve in the fully open state, and B shows the automatic valve in the partially closed state. 1--evaporator, 2--heat exchanger tube, 2a--divided circuit, 3--heat exchanger tube refrigerant inlet, 4-heat exchanger tube refrigerant outlet, 5
- Refrigeration compressor, 5a-suction pipe, 5b-discharge pipe, 6...
- Condenser, 6a - Artificial pipe, 6b - Outlet pipe, 7 - Expansion valve, 8 - Divider, 8a - Branch pipe, 9 - Header, 9a
-Collecting pipe, 10-・Automatic valve, 11.-Temperature detector.
Claims (4)
通過させ、再び圧縮機に循環させる冷凍サイクルにおい
て、冷媒が通過する該蒸発器の伝熱管流路断面積を増減
して蒸発器の伝熱面積を変更し、冷凍圧縮機に供給する
冷媒ガスの過熱を防止することを特徴とする冷凍圧縮機
の圧縮冷媒ガス異常過熱防止方法。1. In a refrigeration cycle in which refrigerant is sequentially passed through a compressor, a condenser, an expansion valve, and an evaporator, and then circulated back to the compressor, the cross-sectional area of the heat transfer tube of the evaporator through which the refrigerant passes is increased or decreased. A method for preventing abnormal overheating of compressed refrigerant gas in a refrigeration compressor, characterized by changing a thermal area and preventing overheating of refrigerant gas supplied to the refrigeration compressor.
弁で減圧し、蒸発器で蒸発した冷媒ガスを再び圧縮機に
戻すようにそれぞれの機器を管路で連結し、該各機器で
圧縮、凝縮、膨張および蒸発の各作用をそれぞれ行う冷
凍装置において、該蒸発器の伝熱管を複数の回路に分割
し、膨張弁出口に分流器を連結し、該分流器の各分岐管
に自動弁を介して前記蒸発器の複数の回路に分割した各
伝熱管を連結し、各分岐管の自動弁により複数の回路の
各伝熱管の何れかを閉塞し、冷媒が通過する伝熱管数を
制限して伝熱管の流路断面積を増減し、蒸発器の伝熱面
積を変更することを特徴とする冷凍圧縮機の圧縮冷媒ガ
ス異常過熱防止装置。2. The refrigerant gas compressed by the compressor is liquefied by the condenser, the pressure is reduced by the expansion valve, and the refrigerant gas evaporated by the evaporator is returned to the compressor again. In a refrigeration system that performs each of the functions of condensation, expansion, and evaporation, the heat transfer tube of the evaporator is divided into multiple circuits, a flow divider is connected to the expansion valve outlet, and an automatic valve is installed in each branch pipe of the flow divider. The heat exchanger tubes divided into multiple circuits of the evaporator are connected through the evaporator, and an automatic valve in each branch pipe closes any of the heat exchanger tubes in the multiple circuits to limit the number of heat exchanger tubes through which the refrigerant passes. A device for preventing abnormal overheating of compressed refrigerant gas in a refrigeration compressor, characterized in that the heat transfer area of an evaporator is changed by increasing or decreasing the flow passage cross-sectional area of a heat transfer tube.
通過させ、再び圧縮機に循環させる二元冷媒サイクルの
低温側において、冷媒が通過する該蒸発器の伝熱管流路
断面積を増減して蒸発器の伝熱面積を変更することを特
徴とする請求項１記載の冷凍圧縮機の圧縮冷媒ガス異常
過熱防止方法。3. On the low-temperature side of a binary refrigerant cycle in which refrigerant is passed through a compressor, condenser, expansion valve, and evaporator in sequence and then circulated back to the compressor, the cross-sectional area of the heat transfer tube flow path of the evaporator through which the refrigerant passes is increased or decreased. 2. The method for preventing abnormal overheating of compressed refrigerant gas in a refrigeration compressor according to claim 1, characterized in that the heat transfer area of the evaporator is changed by changing the heat transfer area of the evaporator.
弁で減圧し、蒸発器で蒸発した冷媒ガスを再び圧縮機に
戻すようにそれぞれの機器を管路で連結し、該各機器で
圧縮、凝縮、膨張および蒸発の各作用を行うようにした
二元冷凍装置の低温側において、蒸発器の伝熱管を複数
の回路に分割し、膨張弁出口に分流器を連結し、該分流
器の各分岐管に自動弁を介して前記蒸発器の複数の回路
に分割した各伝熱管を連結し、各分岐管の自動弁により
複数の回路の各伝熱管の何れかを閉塞することを特徴と
する請求項２記載の冷凍圧縮機の圧縮冷媒ガス異常過熱
防止装置。4. The refrigerant gas compressed by the compressor is liquefied by the condenser, the pressure is reduced by the expansion valve, and the refrigerant gas evaporated by the evaporator is returned to the compressor again. On the low-temperature side of a binary refrigeration system that performs the functions of condensation, expansion, and evaporation, the heat exchanger tube of the evaporator is divided into multiple circuits, a flow divider is connected to the expansion valve outlet, and a flow divider is connected to the expansion valve outlet. Each heat transfer tube divided into a plurality of circuits of the evaporator is connected to each branch pipe via an automatic valve, and the automatic valve of each branch pipe closes any one of the heat transfer tubes of the plurality of circuits. The compressed refrigerant gas abnormal overheating prevention device for a refrigeration compressor according to claim 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22706988A JPH0275860A (en) | 1988-09-09 | 1988-09-09 | Method and apparatus for preventing compressed refrigerant gas of refrigerating compressor from abnormally overheating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22706988A JPH0275860A (en) | 1988-09-09 | 1988-09-09 | Method and apparatus for preventing compressed refrigerant gas of refrigerating compressor from abnormally overheating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0275860A true JPH0275860A (en) | 1990-03-15 |
Family
ID=16855043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22706988A Pending JPH0275860A (en) | 1988-09-09 | 1988-09-09 | Method and apparatus for preventing compressed refrigerant gas of refrigerating compressor from abnormally overheating |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0275860A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1975525A1 (en) * | 2006-01-16 | 2008-10-01 | Daikin Industries, Ltd. | Air conditioner |
| JP2010529410A (en) * | 2007-06-12 | 2010-08-26 | ダンフォス・アクチ−セルスカブ | Method for controlling a vapor compression system |
| CN109114847A (en) * | 2018-09-25 | 2019-01-01 | 珠海格力电器股份有限公司 | A kind of air-conditioning and its control method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5316999U (en) * | 1976-07-26 | 1978-02-13 |
-
1988
- 1988-09-09 JP JP22706988A patent/JPH0275860A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5316999U (en) * | 1976-07-26 | 1978-02-13 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1975525A1 (en) * | 2006-01-16 | 2008-10-01 | Daikin Industries, Ltd. | Air conditioner |
| EP1975525A4 (en) * | 2006-01-16 | 2014-07-23 | Daikin Ind Ltd | Air conditioner |
| JP2010529410A (en) * | 2007-06-12 | 2010-08-26 | ダンフォス・アクチ−セルスカブ | Method for controlling a vapor compression system |
| US9303901B2 (en) | 2007-06-12 | 2016-04-05 | Danfoss A/S | Method for controlling a vapour compression system |
| CN109114847A (en) * | 2018-09-25 | 2019-01-01 | 珠海格力电器股份有限公司 | A kind of air-conditioning and its control method |
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